Disease Control : New England Vegetable Management Guide : UMass Amherst

Outdoor Tomato - General Outdoor Tomato Insect Control Outdoor Tomato Physiological Disorders Outdoor Tomato Weed Control

Anthracnose (Colletotrichum spp.)

Anthracnose is a problem on ripening fruit, but the fungus can also invade leaves and stem tissues.. Lesions are typically tan to brown and may have concentric rings in the center. Leaf lesions may have yellow haloes. Small black fruiting bodies within the lesions produce masses of salmon-colored spores. Rotate away from solanaceous crops for at least one year. Control weeds. Stake plants or use mulch to reduce fruit contact with soil. Avoid overhead irrigation. Harvest fruit regularly to avoid excessively ripe fruit. Apply fungicides according to a disease forecasting system. Disease development, based on weather conditions near your farm, can be monitored online (www.newa.cornell.edu).

FRAC Group 3:

azoxystrobin + difenoconazole (Quadris Top): 8.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3.
azoxystrobin + flutriafol (TopGuard EQ): 4.0 to 8.0 oz/A; PHI 0d, REI 12h, Groups 3 & 11. See label for tank mix precautions.
difenoconazole + benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12h. Groups 7 & 3. Do not make less than 2" applications before switching to a non-Group 7 fungicide.
difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Group 3 & 9. Do not use on varieties where the mature fruit is less than 2" (e.g., cherry tomatoes).
flutriafol (Rhyme): 5.0 to 7.0 fl oz/A; PHI 0d, REI 12.
mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 40 & 3. Addition of a spreading/penetrating adjuvant is recommended.
tetraconazole (Mettle 125ME): 6.0 to 8.0 oz/A; PHI 0d, REI 12h. Begin application before disease onset. Make no more than 2 consecutive applications before alternating to another fungicide with a different mode of action.

FRAC Group 7:

difenoconazole + benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12h. Groups 7 & 3. Do not make less than 2" applications before switching to a non-Group 7 fungicide.
fluxapyroxad + pyraclostrobin (Priaxor Xemium): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11. Do not mix with any other products, adjuvants, additives, nutrients, or anything other than water.

FRAC Group 9:

difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Group 3 & 9. Do not use on varieties where the mature fruit is less than 2" (e.g., cherry tomatoes).

FRAC Group 11:

azoxystrobin (Quadris F): 5.0 to 6.2 fl oz/A; PHI 0d, REI 4h. Do not rotate with other Group 11 fungicides.
azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. See label for tank mix precautions.
azoxystrobin + difenoconazole (Quadris Top): 8.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3.
azoxystrobin + flutriafol (TopGuard EQ): 4.0 to 8.0 oz/A; PHI 0d, REI 12h, Groups 3 & 11. See label for tank mix precautions.
famoxadone + cymoxanil (Tanos): 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27. Must be tank-mixed with an appropriate contact fungicide from a different FRAC Group and alternated with a fungicide from a different FRAC group after 1 application.
fluxapyroxad + pyraclostrobin (Priaxor Xemium): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11. Do not mix with any other products, adjuvants, additives, nutrients, or anything other than water.
pyraclostrobin (Cabrio EG): 8.0 to 12.0 oz/A; PHI 0d, REI 12h. Apply only 6 applications per season or 96 oz/A. Do not make more than two (2) sequential applications before alternating to a labeled non-Group 11 fungicide with a different mode of action.

FRAC Group 19:

polyoxin D zinc salt (Oso 5%SC^OG): 6.5 to 13.0 fl oz/A; PHI 0d, REI 4h. For suppression only.

FRAC Group 27:

famoxadone + cymoxanil (Tanos): 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27. Must be tank-mixed with an appropriate contact fungicide from a different FRAC Group and alternated with a fungicide from a different FRAC group after 1 application.

FRAC Group 40:

mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 40 & 3. Addition of a spreading/penetrating adjuvant is recommended.

FRAC Group M01:

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette. An OMRI-listed formulation is available (Kocide 3000-O^OG).
mancozeb + copper hydroxide (ManKocide): 1.7 lb/A processing, 1.0 to 3.0 lb/A fresh market; PHI 5d, REI 48h, Groups M03 & M01.

FRAC Group M03:

mancozeb (Dithane F45): 1.2 to 2.4 qt/A; PHI 5d, REI 24h.
mancozeb + copper hydroxide (ManKocide): 1.7 lb/A processing, 1.0 to 3.0 lb/A fresh market; PHI 5d, REI 48h, Groups M03 & M01.
ziram (Ziram 76 DF): 3.0 to 4.0 lb/A; PHI 7d, REI 48h. Do not use on cherry tomatoes.

FRAC Group M05:

azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. See label for tank mix precautions.
chlorothalonil (Bravo Weather Stik): 2.0 to 2.75 pt/A; PHI 0d, REI 12h.
chlorothalonil + phosphorous acid (Catamaran): 7.0 pt/A; PHI 0d, REI 12, Groups M05 & P07. Apply to fruit. Not labeled for New Hampshire.

FRAC Group NC:

hydrogen peroxide + peroxyacetic acid (Oxidate 2.0OG): 1:40 (rescue), 1:100 dilution (curative), or 1:200 to 1:400 dilution (preventative); PHI 0d, REI until sprays dry (field), 1h fogging/spraying or 0h other methods (enclosed areas). Do not tank mix with copper.

FRAC Group P07:

chlorothalonil + phosphorous acid (Catamaran): 7.0 pt/A; PHI 0d, REI 12, Groups M05 & P07. Apply to fruit. Not labeled for New Hampshire.

Gray Mold (Botrytis cinerea)

Grey mold is a common disease of tomato and is particularly damaging in greenhouses but can also be seen in the field in humid or wet years. The pathogen infects leaves, stems, petioles, and fruit. White ring spots or “ghost spots” develop on fruit when the pathogen invades the fruit then ceases growth prior to causing decay. Injured transplants can develop dark brown cankers that may girdle the stem.Gray, fuzzy fungal growth may be visible. . Reduce plant wetness by avoiding overhead irrigation. Practice strict sanitation, removing senescent tissues and infected crop debris. Pruning of lower leaves to clean-cut stubs aids in disease prevention by improving air circulation through the crop. Fungicides are useful in protecting fruit; a diversity of fungicides with different modes of action must be used as Botrytis commonly develops fungicide resistance. Many products labeled for leaf spots will also provide some control for gray mold. See Leaf Spots section.

FRAC Group 3:

fluopyram + difenoconazole (Luna Flex): 8.0 to 13.6 fl oz/A; PHI 0d, REI 12h, Groups 3 & 7.

FRAC Group 7:

fluopyram + difenoconazole (Luna Flex): 8.0 to 13.6 fl oz/A; PHI 0d, REI 12h, Groups 3 & 7.
penthiopyrad (Fontelis): 16.0 to 24.0 fl oz/A; PHI 0d, REI 12h. Make no more than 2 sequential applications before switching to a fungicide with a different mode of action.

FRAC Group 9:

pyrimethanil (Scala SC): 7.0 fl oz/A; PHI 1d, REI 12h.

FRAC Group 19:

polyoxin D (Oso 5%SC^OG): 6.5 to 13.0 fl ox/A; Phi 0d, REI 4h.

FRAC Group BM02:

Ulocladium oudemansii U3 strain (BotryStop WP^OG): 2.0 to 4.0 lb/A; PHI 0d, REI 4h. Begin application when conditions are conducive to disease development.

Leaf Spots: Early Blight (Alternaria solani) and Septoria Leaf Spot (Septoria lycopersici)

Early blight appears as large, irregular, brown lesions, often with concentric rings and yellow haloes. Septoria leaf spots tend to be smaller and have light tan centers surrounded by a dark border. In contrast to those caused by Stemphylium, Septoria leaf spots often appear on stems and petioles. Both early blight and Septoria leaf spot generally begin on the lower leaves and move upward. Lesions may coalesce and blight entire leaves. These diseases may occur together or separately and both may be seedborne. Hot water treat seeds at 122ºF for 25 minutes to destroy potential seed-borne pathogens. Plow under plant debris after harvest. Rotate away from tomatoes for at least 2 years. Provide optimum nutrition throughout the season. Stake tomatoes to improve air circulation and use mulch to prevent rainsplash. If planting in an area with a history of either disease, begin fungicide applications before disease is evident, usually when first fruit are half grown or approximately the first week of July. Follow fungicide intervals recommended by a disease forecasting system (TOMCAST) if weather and forecast data are available in your region. Disease development, based on weather conditions near your farm, can be monitored online (www.newa.cornell.edu).

FRAC Group 3:

azoxystrobin + difenoconazole (Quadris Top): 7.5 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3. See label for adjuvant precautions.
azoxystrobin + flutriafol (TopGuard EQ): 4.0 to 8.0 oz/A; PHI 0d, REI 12h, Group 3 & 11. On fresh market tomatoes, do not use adjuvants or EC formulated tank mix partners.
difenoconazole + benzovindiflupyr (Aprovia Top): 8.5 to 13.5 fl oz/A; PHI 0d, REI 12. Groups 7 & 3. Do not apply to greenhouse tomato. Do not use for commercial transplant production.
difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Group 3 & 9.
flutriafol (Rhyme, aka Flutriafol 250 G/L SC): 3.5 to 7.0 fl oz/A; PHI 0d, REI 12.
mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 40 & 3. Addition of a spreading/penetrating adjuvant is recommended.
tetraconazole (Mettle 125 ME): 6.0 to 8.0 fl oz/A; PHI 0d, REI 12h. Begin application at onset of disease.

FRAC Group 7:

difenoconazole + benzovindiflupyr (Aprovia Top): 8.5 to 13.5 fl oz/A; PHI 0d, REI 12. Groups 7 & 3. Do not apply to greenhouse tomato. Do not use for commercial transplant production.
fluopyram (Velum Prime): 4.0 to 6.8 fl oz/A; PHI 0d, REI 12h. Do not make more than 2 applications per year.
fluopyram + pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Group 7 & 9.
fluxapyroxad + pyraclostrobin (Priaxor Xemium): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11.
penthiopyrad (Fontelis): 16.0 to 24.0 fl oz/A; PHI 0d, REI 12h.

FRAC Group 9:

cyprodinil + fludioxonil (Switch 62.5 WG): 11.0 to 14.0 oz/A; PHI 0d, REI 12h, Groups 9 & 12. After 2 applications, alternate with another fungicide with a different mode of action for 2 applications.
difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Group 3 & 9.
fluopyram + pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Group 7 & 9.
pyrimethanil (Scala SC): 7.0 fl oz/A; PHI 1d, REI 12h. Use only in a tank mix with another fungicide labeled for control of early blight.

FRAC Group 11:

azoxystrobin (Quadris F): 5.0 to 6.2 fl oz/A; PHI 0d, REI 4h. Do not apply more than 1 application before alternating with a non-Group 11 fungicide. On fresh market tomatoes do not use adjuvants or tank mix with any emulsifiable concentrate (EC) product.
azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. Do not use with adjuvant as they may increase the potential for severe phytotoxicity. See label for tank mix precautions.
azoxystrobin + difenoconazole (Quadris Top): 7.5 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3. See label for adjuvant precautions.
azoxystrobin + flutriafol (TopGuard EQ): 4.0 to 8.0 oz/A; PHI 0d, REI 12h, Group 3 & 11. On fresh market tomatoes, do not use adjuvants or EC formulated tank mix partners.
famoxadone + cymoxanil (Tanos): 6.0 to 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27. Must be tank-mixed with an appropriate contact fungicide from a different FRAC Group and alternated with a fungicide from a different FRAC Group after 1 application.
fenamidone (Reason 500 SC): 5.5 to 8.2 fl oz/A; PHI 14d, REI 12h.
fluxapyroxad + pyraclostrobin (Priaxor Xemium): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11.
pyraclostrobin (Cabrio EG): 8.0 to 12.0 oz/A; PHI 0d, REI 12h. Do not rotate with other Group 11 fungicides.
trifloxystrobin (Flint): 2.0 to 3.0 oz/A (for early blight), 3.0 to 4.0 oz/A (for Septoria suppression); PHI 3d, REI 12h. Do not rotate with other Group 11 fungicides.

FRAC Group 12:

cyprodinil + fludioxonil (Switch 62.5 WG): 11.0 to 14.0 oz/A; PHI 0d, REI 12h, Groups 9 & 12. After 2 applications, alternate with another fungicide with a different mode of action for 2 applications.

FRAC Group 19:

polyoxin D (Oso 5%SC^OG): 6.5 to 13.0 fl oz/A; PHI 0d, REI 4h.

FRAC Group 22:

mancozeb + zoxamide (Gavel 75DF): 1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups M03 & 22.

FRAC Group 27:

famoxadone + cymoxanil (Tanos): 6.0 to 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27. Must be tank-mixed with an appropriate contact fungicide from a different FRAC Group and alternated with a fungicide from a different FRAC Group after 1 application.

FRAC Group 28:

propamocarb HCl (Previcur Flex): 0.7 to 1.5 pt/A; PHI 5d, REI 12h.

FRAC Group 40:

mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 40 & 3. Addition of a spreading/penetrating adjuvant is recommended.

FRAC Group BM02:

Bacillus pumilus strain QST 2808 (Sonata^OG): 2.0 to 4.0 qt/A; PHI 0d, REI 4h.
Bacillus subtilis strain QST 713 (Serenade Opti^OG): 14.0 to 20.0 oz/A; PHI 0d, REI 4. Not for Septoria leaf spot.

FRAC Group M01:

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette. An OMRI-listed formulation is available (Kocide 3000-O^OG).
mancozeb + copper hydroxide (ManKocide): 1.7 lb/A (processing), 1.0 to 3.0 lb/A (fresh market); PHI 5d, REI 48h, Groups M03 & M01.

FRAC Group M03:

mancozeb (Dithane F45): 1.2 to 2.4 qt/A; PHI 5d, REI 24h. See label for surfactant information.
mancozeb + copper hydroxide (ManKocide): 1.7 lb/A (processing), 1.0 to 3.0 lb/A (fresh market); PHI 5d, REI 48h, Groups M03 & M01.
mancozeb + zoxamide (Gavel 75DF): 1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups M03 & 22.
ziram (Ziram 76DF): 3.0 to 4.0 lb/A; PHI 7d, REI 48h. Do not use on cherry tomato.

FRAC Group M05:

azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. Do not use with adjuvant as they may increase the potential for severe phytotoxicity. See label for tank mix precautions.
chlorothalonil (Bravo Weather Stik): 1 3/8 to 2.0 pt/A; PHI 0d, REI 12h.
chlorothalonil + phosphorous acid (Catamaran): 4.5 to 5.5 pt/A; PHI 0d, REI 12h, Groups M05 & P7.

FRAC Group NC:

hydrogen peroxide + peroxyacetic acid (Oxidate 2.0^OG): 1:40; PHI 0d, REI until sprays dry (field), 1h fogging/spraying or 0h other methods (enclosed areas). Do not tank mix with copper.

FRAC Group P06:

Bacillus mycoides Isolate J (LifeGard LC^OG): 1 gal/100 gal water; PHI 0d, REI 4h.

FRAC Group P7:

chlorothalonil + phosphorous acid (Catamaran): 4.5 to 5.5 pt/A; PHI 0d, REI 12h, Groups M05 & P7.

Late Blight (Phytophthora infestans)

Younger foliage tends to be more susceptible to late blight than older foliage. Large, irregular, brown lesions appear on leaves and petioles. Lesions may be surrounded by a light-colored halo. Under humid conditions, white sporulation may be observed on the undersides of leaves. Entire leaves may wilt and turn brown. Firm brown lesions may also appear on fruit. Protectant fungicides are a key tool for management; however, many strains of P. infestans have become resistant to mefenoxam, so fungicide rotation is critical. Disease development, based on weather conditions near your farm, can be monitored online (www.newa.cornell.edu). Disease progression throughout the US can also be monitored (www.usablight.org). Avoid the use of overhead irrigation. Promptly plow under old tomato fields after harvest. Eliminate cull piles and volunteer plants of both tomato and potato. Some resistant cultivars are available.

FRAC Group 3:

mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 3 & 40. The addition of a spreading/penetrating type adjuvant is recommended.

FRAC Group 4:

mefenoxam + chlorothalonil (Ridomil Gold Bravo SC): 2.5 pt/A; PHI 7d, REI 48h, Groups 4 & M05.
mefenoxam + mancozeb (Ridomil Gold MZ): 2.5 lb./A; PHI 5d, REI 48h, Groups 4 & M03. Do not plant any crop which is not registered for use with Ridomil Gold active ingredient in treated soil for a period of 12 months.

FRAC Group 11:

azoxystrobin (Quadris F): 6.2 fl oz/A; PHI 0d, REI 4h. Do not rotate with other Group 11 fungicides.
azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. See label for tank mix restrictions.
famoxadone + cymoxanil (Tanos): 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27. Must be tank-mixed with an appropriate contact fungicide from a different FRAC Group and alternated with a fungicide from a different FRAC Group after 1 application.
fenamidone (Reason 500SC): 5.5 to 8.2 fl oz/A; PHI 14d, REI 12h. Do not make more than 1 application before rotating to a fungicide from a different FRAC Group.
pyraclostrobin (Cabrio EG): 8.0 to 16.0 oz/A; PHI 0d, REI 12h.
trifloxystrobin (Flint): 4.0 oz/A; PHI 3d, REI 12h. Apply in a tank mixture with 75% of a labeled rate of a protectant fungicide. Do not rotate with other Group 11 fungicides.

FRAC Group 19:

polyoxin D zinc salt (Oso 5%SC^OG): 6.5 to 13.0 fl oz/A; PHI 0d, REI 4h. For suppression only.

FRAC Group 21:

cyazofamid (Ranman 400 SC): 2.1 to 2.75 fl oz/A; PHI 0d, REI 12h. Begin applications when forecast systems (NEWA) predict disease infection periods. If other diseases are present, tank mix with a Group M03 or M05 fungicide.

FRAC Group 22:

zoxamide + chlorothalonil (Zing!): 30.0 to 36.0 fl oz/A; PHI 5d, REI 12h, Groups 22 & M05.
zoxamide + mancozeb (Gavel 75 DF): 1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups 22 & M03.

FRAC Group 27:

cymoxanil (Curzate 60 DF): 3.2 to 5.0 oz/A; PHI 3d, REI 12h. Use only in combination with a labeled rate of a protectant fungicide (e.g., copper, chlorothalonil).
cymoxanil + chlorothalonil (Ariston, aka Echo 459): 1.9 to 3.0 pt/A; PHI 3d, REI 12h, Groups 27 & M05. For foliage or fruit applications.
famoxadone + cymoxanil (Tanos): 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27. Must be tank-mixed with an appropriate contact fungicide from a different FRAC Group and alternated with a fungicide from a different FRAC Group after 1 application.

FRAC Group 28:

propamocarb HCl (Previcur Flex): 0.7 to 1.5 pt/A; PHI 5d, REI 12h.

FRAC Group 40:

ametoctradin + dimethomorph (Zampro): 14.0 fl oz/A; PHI 4d, REI 12h, Groups 45 & 40. Do not make more than two (2) sequential applications before alternating to a labeled fungicide with a different mode of action.
dimethomorph (Forum): 6.0 fl oz/A; PHI 4d, REI 12h. Must be applied as a tank-mix with another fungicide from a different FRAC Group.
mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 3 & 40. The addition of a spreading/penetrating type adjuvant is recommended.

FRAC Group 43:

fluopicolide (Presidio 4SC): 3.0 to 4.0 fl oz/A; PHI 2d, REI 12h. Must be tank mixed with a fungicide from a different FRAC Group.

FRAC Group 45:

ametoctradin + dimethomorph (Zampro): 14.0 fl oz/A; PHI 4d, REI 12h, Groups 45 & 40. Do not make more than two (2) sequential applications before alternating to a labeled fungicide with a different mode of action.

FRAC Group 49:

oxathiapiprolin (Orondis Gold 200): 4.8 to 9.6 fl oz/A; PHI 0d, REI 4h. Apply at planting.
oxathiapiprolin + chlorothalonil (Orondis Opti): 1.75 to 3.6 pt/A; PHI 0d, REI 12h, Groups M05 & 49.

FRAC Group BM02:

Bacillus amyloliquefaciens strain D747 (Double Nickel 55^OG): 0.125 to 1 lb/A (soil), 0.25 to 3 lb/A (foliar); PHI 0d, REI 4h.

FRAC Group M01:

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette. An OMRI-listed formulation is available (Kocide 3000-O^OG).
mancozeb + copper hydroxide (ManKocide): 1.7 lb/A processing, 1.0 to 3.0 lb A fresh market; PHI 5d, REI 48h, Groups M03 & M01.

FRAC Group M03:

mancozeb (Dithane F45): 1.2 to 2.4 qt/A; PHI 5d, REI 24h. See label for surfactant instructions.
mancozeb + copper hydroxide (ManKocide): 1.7 lb/A processing, 1.0 to 3.0 lb A fresh market; PHI 5d, REI 48h, Groups M03 & M01.
mefenoxam + mancozeb (Ridomil Gold MZ): 2.5 lb./A; PHI 5d, REI 48h, Groups 4 & M03. Do not plant any crop which is not registered for use with Ridomil Gold active ingredient in treated soil for a period of 12 months.
zoxamide + chlorothalonil (Zing!): 30.0 to 36.0 fl oz/A; PHI 5d, REI 12h, Groups 22 & M05.
zoxamide + mancozeb (Gavel 75 DF): 1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups 22 & M03.

FRAC Group M05:

azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. See label for tank mix restrictions.
chlorothalonil (Bravo Weather Stik, aka Bravo 720SC): 1.375 to 2.0 pt/A; PHI 0d, REI 12h.
chlorothalonil + phosphorous acid (Catamaran): 4.5 to 5.5 pt/A; PHI 0d, REI 12h, Groups M05 & P07.
cymoxanil + chlorothalonil (Ariston, aka Echo 459): 1.9 to 3.0 pt/A; PHI 3d, REI 12h, Groups 27 & M05. For foliage or fruit applications.
mefenoxam + chlorothalonil (Ridomil Gold Bravo SC): 2.5 pt/A; PHI 7d, REI 48h, Groups 4 & M05.
oxathiapiprolin + chlorothalonil (Orondis Opti): 1.75 to 3.6 pt/A; PHI 0d, REI 12h, Groups M05 & 49.

FRAC Group P06:

Bacillus mycoides Isolate J (LifeGuard LC^OG): 1.0 gal/100 gal water/A; PHI 0d, REI 4h.

FRAC Group P07:

chlorothalonil + phosphorous acid (Catamaran): 4.5 to 5.5 pt/A; PHI 0d, REI 12h, Groups M05 & P07.
potassium phosphite (ProPhyt): 4.0 pt/A; PHI 0d, REI 4h, Group P07. Apply in tank mix with contact products like chlorothalonil (Group M05) or mancozeb (Group M03). Read label; rates vary between products.

Phytophthora Blight and Watery Fruit Rot (P. capsici, Pythium spp.)

Phytophthora capsici fruit infection is also called buckeye rot. The lesions of buckeye rot are typically firm and brown, often with concentric circles. Both green and ripe fruit may be affected. Pythium fruit infection, is called watery fruit rot or cottony rot. Cottony rot causes a soft, messy rot of ripe fruit. Both pathogens may cause symptoms on other plant parts under flooded conditions.To avoid fruit rots, keep plant tops dry by avoiding overhead irrigation and using drip irrigation instead. Prepare the soil and beds so as to enhance drainage and avoid planting in low areas. Stake plants and/or use mulches to minimize fruit contact with the soil. Fungicides may be used to control crown, foliar, and fruit infections.

See the Pepper disease control section for more information on Phytophthora blight.

Powdery Mildew (several genera)

Powdery mildew appears as white mycelium on both sides of the foliage. It is more common in the greenhouse than in the field, but in either case it can cause early plant senescence and reduced yields. This pathogen is favored by low light, high humidity, and cool temperatures. In contrast to other fungal plant pathogens, it does not require free water to germinate and cause disease. Powdery mildews are obligate parasites and survive on overwintering tomato, alternate weed hosts, or perhaps as sexual fruiting bodies. Promptly remove or plow under tomato crop debris after harvest. Control volunteer tomatoes and solanaceous weeds. Stake plants and/or space them properly to encourage air circulation. Resistant varieties are available.

FRAC Group 3:

azoxystrobin + flutriafol (TopGuard EQ): 4.0 to 8.0oz/A; PHI 0d, REI 12h, Groups 11 & 3. See label for tank mix precautions.
difenoconazole + benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12. Groups 7 & 3.
difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Group 3 & 9. The addition of a spreading/penetrating type adjuvant may enhance efficacy.
flutriafol (Rhyme, aka Flutriafol 250 G/L SC): 5.0 to 7.0 fl oz/A; PHI 0d, REI 12.
mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 3 & 40. The addition of a spreading/penetrating type adjuvant is recommended.
myclobutanil (Rally 40WSP): 2.5 to 4.0 oz/A; PHI 0d, REI 24h. Observe a 30-day plant-back interval between last spray and the planting of new crops.
tetraconazole (Mettle 125ME): 6.0 to 8.0 fl oz/A; PHI 0d, REI 12h.

FRAC Group 7:

difenoconazole + benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12. Groups 7 & 3.
fluopyram + pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Group 7 & 9. Suppression only.
fluxapyroxad + pyraclostrobin (Priaxor Xemium): 6.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11.

FRAC Group 9:

cyprodinil + fludioxonil (Switch 62.5 WG): 11.0 to 14.0 oz/A; PHI 0d, REI 12h, Groups 9 & 12.
difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Group 3 & 9. The addition of a spreading/penetrating type adjuvant may enhance efficacy.
fluopyram + pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Group 7 & 9. Suppression only.

FRAC Group 11:

azoxystrobin (Quadris F): 5.0 to 6.2 fl oz/A; PHI 0d, REI 4h. Do not rotate with other Group 11 fungicides.
azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. See label for tank mix precautions.
azoxystrobin + flutriafol (TopGuard EQ): 4.0 to 8.0oz/A; PHI 0d, REI 12h, Groups 11 & 3. See label for tank mix precautions.
fluxapyroxad + pyraclostrobin (Priaxor Xemium): 6.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11.

FRAC Group 12:

cyprodinil + fludioxonil (Switch 62.5 WG): 11.0 to 14.0 oz/A; PHI 0d, REI 12h, Groups 9 & 12.

FRAC Group 19:

polyoxin D (OSO 5%SC^OG): 6.0 to 13.0 fl oz/A; PHI 0d, REI 4h.

FRAC Group 40:

mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 3 & 40. The addition of a spreading/penetrating type adjuvant is recommended.

FRAC Group 50:

metrafenone (Vivando): 10.3 to 15.4 fl oz/A; PHI 0d, REI 12h. Do not mix with horticultural oils when making applications to crops in the fruiting vegetables group.

FRAC Group BM02:

Bacillus pumilus Strain QST 2808 (Sonata ASO^OG): 2.0 to 4.0 qt/A; PHI 0d, REI 4h. For improved performance, use in a tank mix or rotational program with other registered fungicides for powdery mildew control.

FRAC Group M02:

sulfur (Microthiol Disperss^OG): 3.0 to 10.0 lb/A; PHI 0d, REI 24h. Do not apply when temperatures will exceed 90°F within 3 days of application.

FRAC Group M05:

azoxystrobin + chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M05. See label for tank mix precautions.

FRAC Group NC:

hydrogen peroxide + peroxyacetic acid (Oxidate 2.0OG): 1:40 (rescue), 1:100 dilution (curative), or 1:200 to 1:400 dilution (preventative); PHI 0d, REI until sprays dry (field), 1h fogging/spraying or 0h other methods (enclosed areas). Do not tank mix with copper.
paraffinic oil (JMS Stylet-Oil): 3.0 to 6.0 qt/100 gal water; PHI 0d, REI 4h. Spray for thorough coverage of upper leaf surface. An organic formulation is available.
potassium bicarbonate (MilStop^OG): 2.0 to 5.0 lb/100 gal water/A; PHI 0d, REI 1h. Thorough crop coverage is required. Do not store unused spray solution.

White Mold, Timber Rot (Sclerotinia sclerotiorum)

Sclerotinia produces robust white mycelium and hardened black fungal survival structures called sclerotia that can survive several years in the soil. These signs typically occur in stems at or above the soil line. Plants do not thrive and eventually collapse. This pathogen has many vegetable hosts but is particularly destructive to tomatoes. Rotate with corn or other grass species. Do not plant tomatoes in fields with a history of this disease. Encourage rapid soil drying by irrigating in the morning and/or using drip irrigation. Avoid excessive nitrogen levels and ensure adequate potassium fertility. Soil sterilization with chemical, steam, or heat treatments (solarization) can significantly reduce sclerotia (inoculum) in the soil. Research has shown promise from incorporating broccoli biomass or brassica cover crops and the biocontrol agent, Contans (Coniothyrium minitans strain CON/M/91-08) .

Note: the current Bayer and Lallemand labels for Coniothyrium minitans (Contans WG) do not include tomato. The labels do include most other vegetable fruit crops, which are also hosts for the disease, and so the product can be applied prior to planting a labeled crop to act on sclerotia in the field and manage the disease in a subsequent tomato crop.

FRAC Group 7:

fluxapyroxad + pyraclostrobin (Priaxor Xemium): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11. For suppression only.
fluopyram + trifloxystrobin (Luna Sensation): 7.6 fl oz/A; PHI 3d, REI 12h, Group 7 & 11. For suppression only.

FRAC Group 11:

fluxapyroxad + pyraclostrobin (Priaxor Xemium): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11. For suppression only.
fluopyram + trifloxystrobin (Luna Sensation): 7.6 fl oz/A; PHI 3d, REI 12h, Group 7 & 11. For suppression only.
pyraclostrobin (Cabrio EG): 12.0 to 16.0 oz/A; PHI 0d, REI 12h. For suppression only.

Bacterial Canker (Clavibacter michiganensis subsp. michiganensis), Bacterial Speck (Pseudomonas syringae pv. tomato), and Bacterial Leaf Spot (Xanthomonas spp.)

Bacterial canker is the most destructive bacterial disease of tomatoes in our region. For more information, see the Tomato, Greenhouse and High Tunnel disease control section for more information on bacterial canker. Bacterial speck (aka pepper spot) primarily affects fruit, causing very small black spots. It can also affect stems and leaves, causing spots that may coalesce and affect larger areas. The pathogen typically only affects tomato, but it may also be harbored on some weeds. This disease is favored by temperatures of 55 to 77°F and wet conditions. Bacterial spot causes brown leaf lesions that may dry out and become cracked in the center. In severe cases, leaves can become blighted and drop. On fruit, the superficial spots are dark and raised but can become sunken as fruit expands. Pepper and ground cherry are also susceptible. This disease is favored by temperatures of 75 to 86°F and wet conditions. All three bacterial diseases may be seedborne or may overwinter in crop debris in the field and on wooden stakes. No resistant cultivars are available. Buy hot water treated seed or seed certified to be free of bacteria. See the Hot Water Treatment of Seed in the Disease Management section. Avoid working in fields when plants are wet. Rotate out of tomatoes for at least 2 years. Use copper or streptomycin on plants before transplanting. Disinfect stakes before reusing.

FRAC Group 11:

famoxadone + cymoxanil (Tanos): 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27.

FRAC Group 22:

zoxamide + mancozeb (Gavel 75DF): 2.0 lb/A; PHI 5d, REI 48h, Groups 22 & M03. For bacterial leaf spot and speck only. Use full rate of a fixed copper tank mixed with a full rate of Gavel.

FRAC Group 25:

streptomycin sulfate (Agri-Mycin 17): 0.5 to 1.0 lb/50 to 100 gal; REI 12h. For bacterial leaf spot and speck only. For use on transplants only, prior to transplanting. Not for field use.

FRAC Group 27:

famoxadone + cymoxanil (Tanos): 8.0 oz/A; PHI 3d, REI 12h, Groups 11 & 27.

FRAC Group BM02:

Bacillus subtilis strain QST 713 (Serenade ASO^OG): 2.0 to 4.0 qt/A; PHI 0d, REI 4h.
Bacillus subtilis var. amyloliquefaciens strain FZB24 (Taegro 2.0^OG): 2.6 to 5.2 oz/A; PHI 0d, REI 4h. For bacterial leaf spot and speck only.

FRAC Group M01:

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h. For bacterial leaf spot and speck only. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette. An OMRI-listed formulation is available (Kocide 3000-O^OG).
copper sulfate (Cuprofix Ultra 40 Disperss): 0.75 to 3 lb/A (fresh market), 0.75 to 1.33 lb/A (processing); PHI 0d, REI 48h. Rates and REIs vary by product.
mancozeb + copper hydroxide (ManKocide): 1.0 to 3.0 lb/A; PHI 5d, REI 48h, Groups M03 & M01. For bacterial leaf spot and speck only.

FRAC Group M03:

mancozeb (Dithane F45): 1.2 to 2.4 qt/A; PHI 5d, REI 24h. For bacterial leaf spot and speck only. Use a full rate of fixed copper in a tank mix with half to full rate of Dithane F45.
mancozeb + copper hydroxide (ManKocide): 1.0 to 3.0 lb/A; PHI 5d, REI 48h, Groups M03 & M01. For bacterial leaf spot and speck only.
zoxamide + mancozeb (Gavel 75DF): 2.0 lb/A; PHI 5d, REI 48h, Groups 22 & M03. For bacterial leaf spot and speck only. Use full rate of a fixed copper tank mixed with a full rate of Gavel.

FRAC Group P01:

acibenzolar-S-methyl (Actigard 50 WG): 0.33 to 0.75 oz/A; PHI 14d, REI 12h. Apply to healthy, actively growing plants preventively. For bacterial leaf spot and speck only.

FRAC Group P06:

Bacillus mycoides Isolate J (LifeGard LC^OG): 1.0 gal/100 gal water; PHI 0d, REI 4. For bacterial leaf spot and speck only.

FRAC Group P07:

potassium salts of phosphorous acid + hydrogen peroxide (Oxiphos): 2.5 to 5.0 qt/A; PHI 0d, REI 4h. For bacterial leaf spot and speck only. Apply as dilute foliar spray or via irrigation applied immediately after planting. Do not exceed more than 2.5% v/v solution.

Cucumber Mosaic Virus (CMV)

The host range of CMV includes plants in at least 31 different families, and several strains of the virus are known. In tomato, symptoms include mosaic, mottling, leaf distortion, and stunting. Symptoms of CMV can be confused with those of tobacco mosaic virus as well as other virus diseases. The disease is spread by several species of aphids in a nonpersistent manner, meaning the virus is only transmitted by the vector for a short period of time; therefore, insecticides are not helpful for virus control Reduce weeds, especially chickweed, pokeweed, and milkweed, as much as practical. Isolate tomato fields from cucurbits especially where there has been a history of CMV. No resistant varieties are currently available.

Tobacco and Tomato Mosaic Virus (TMV, ToMV)

Several strains of tobacco mosaic virus (TMV) exist including the closely related tomato mosaic virus (ToMV). Symptoms on tomato can vary considerably as will the severity of disease and the effect on yield. Either virus can be seedborne or transferred from previously infected plant debris, weeds, transplants, other crops, or workers using tobacco products. Unlike most other viruses, TMV and ToMV are easily spread from plant to plant by contact with hands and tools. Insects are not considered to be important vectors. Grow resistant varieties, which are widely available. Control weeds as much as practical. Hands and clothes soiled with tobacco or from handling infected plants (including weeds) can transmit the virus. When working with plants, avoid wearing soiled clothes. Wash hands after weeding or smoking. Do not plant susceptible pepper or tomato varieties for at least 2 years on land that previously had TMV-infected crops. Handle plants as little as possible. Do not allow workers to use tobacco products while working with plants

Tomato Brown Rugose Fruit Viruses (ToBRFV)

Tomato brown rugose fruit virus (ToBRFV) is a recently identified virus infecting tomatoes, pepper, and possibly their solanaceous relatives. Leaf symptoms of ToBRFV include wrinkling with an accompanying mosaic pattern. Infected fruit has a brown calyx and is undersized with a rough surface. Fruit abortion may occur, and fruit may be blotchy and pale with brown, dead spots. ToBRFV spread and control is similar to TMV and ToMV. There are no reports of transmission by aphids, leafhoppers, or white flies. Good sanitation is the key to avoidance. Purchase certified seed from reputable sources and have greenhouse workers wash and sterilize hands and tools often. Dispose of symptomatic plants and plants within 5' of infected plants. Dispose of plants, trays, and media through incineration. ToBRFV can survive in plant debris and on stakes for extended periods. There are no sprays effective in reducing the virus’ spread. Tomato varieties with tolerance to TOBRFV are just becoming available. Peppers with tolerance to TMV and pepper mild mottle virus (PMMoV) have shown some tolerance. There is rigorous testing of transplants, seeds, and fruit to prevent the risk of the virus’ spread into the US. Confirmation of the virus requires laboratory identification testing.

Gray Leaf Spot (Stemphylium lycopersici, S. solani, and S. botryosum)

Gray leaf spot of tomato is caused by Stemphylium lycopersici, S. solani, and S. botryosum. Peppers and eggplant are also susceptible. Symptoms begin as small brown lesions that may or may not have a yellow halo. Severely affected leaves may turn yellow or brown and defoliate. Symptoms are seldom seen on petioles or stems (in contrast with Septoria), and fruit is not affected. Stemphylium species survive in infected crop debris and solanaceous weeds. They may also be seedborne. The optimum temperature for spore germination and disease development is 75-80°F. Management options include proper plant spacing and removal of lower leaves to increase air circulation. Avoid overhead watering if possible. Control weeds and remove volunteer solanaceous plants from fields. Remove or plow under infected crop debris and rotate away from Solanaceous crops for at least 3 years. Plant tomato cultivars that have the Sm resistance gene.

FRAC Group 3:

azoxystrobin + difenoconazole (Quadris Top): 8.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3. A tank mixture with Dimethoate may cause crop injury. On fresh market tomatoes, do not use adjuvants or tank mix with any EC product.
difenoconazole + benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12h, Groups 3 & 7. Do not apply to greenhouse tomatoes.
difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Groups 3 & 9. Use of a spreading adjuvant is recommended.
difenoconazole + fluopyram (Luna Flex): 8.0 to 13.6 fl oz/A; PHI 0d, REI 12h, Groups 3 & 7.
mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 3 & 40. Begin applications prior to disease development. The addition of a spreading/penetrating type adjuvant is recommended.
tetraconazole (Mettle 125ME): 6.0 to 8.0 fl oz/A; PHI 0d, REI 12h.

FRAC Group 4:

chlorothalonil + mefenoxam (Ridomil Gold Bravo SC): 2.5pt/A; PHI 7d, REI 48h, Groups M05 & 4. Begin preventive applications early when conditions are favorable for disease.

FRAC Group 7:

difenoconazole + benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12h, Groups 3 & 7. Do not apply to greenhouse tomatoes.
difenoconazole + fluopyram (Luna Flex): 8.0 to 13.6 fl oz/A; PHI 0d, REI 12h, Groups 3 & 7.
fludioxonil + pydiflumetofen (Miravis Prime): 9.2 to 11.4 fl oz/A; PHI 0d, REI 12h, Groups 7 & 12. Do not use in greenhouse. Apply by ground, air, or chemigation.
fluopyram + pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Groups 7 & 19.

FRAC Group 9:

difenoconazole + cyprodinil (Inspire Super): 16.0 to 20.0 fl oz/A; PHI 0d, REI 12h, Groups 3 & 9. Use of a spreading adjuvant is recommended.

FRAC Group 11:

azoxystrobin + difenoconazole (Quadris Top): 8.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3. A tank mixture with Dimethoate may cause crop injury. On fresh market tomatoes, do not use adjuvants or tank mix with any EC product.
trifloxystrobin (Flint): 4.0 oz/A; PHI 3d, REI 12h. Begin applications preventively.

FRAC Group 12:

fludioxonil + pydiflumetofen (Miravis Prime): 9.2 to 11.4 fl oz/A; PHI 0d, REI 12h, Groups 7 & 12. Do not use in greenhouse. Apply by ground, air, or chemigation.

FRAC Group 19:

fluopyram + pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Groups 7 & 19.

FRAC Group 22:

chlorothalonil + zoxamide (Zing!): 30.0 to 36.0 fl oz/A; PHI 5d, REI 12h, Groups M05 & 22.
mancozeb + zoxamide (Gavel 75DF):1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups M03 & 22. Start applications when seedlings emerge or transplants are set.

FRAC Group 40:

mandipropamid + difenoconazole (Revus Top): 5.5 to 7.0 fl oz/A; PHI 1d, REI 12h, Groups 3 & 40. Begin applications prior to disease development. The addition of a spreading/penetrating type adjuvant is recommended.

FRAC Group 49:

chlorothalonil + oxathiapiprolin (Orondis Opti (Premix): 1.75 to 3.6 pt/A; PHI 0d, REI 12h, Groups M05 & 49.

FRAC Group M01:

basic copper sulfate (Basic Copper 53OG):0.75 to 3.0 lb/A; PHI 0d, REI 48h. May cause crop injury.
copper hydroxide (Nu-Cop 50WP^OG): 1.0 lb/A; PHI 1d, REI 48h.
mancozeb + copper (ManKocide):1.0 to 3.0 lb/A; PHI 5d, REI 24 or 48h, Groups M03 & M01.

FRAC Group M03:

mancozeb (Dithane F-45 Rainshield): 1.2 to 2.4 qt/A; PHI 5d, REI 24h. Start applications when seedlings emerge or transplants are set. The addition of a surfactant to spray solutions will improve performance.
mancozeb + copper (ManKocide):1.0 to 3.0 lb/A; PHI 5d, REI 24 or 48h, Groups M03 & M01.
mancozeb + zoxamide (Gavel 75DF):1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups M03 & 22. Start applications when seedlings emerge or transplants are set.

FRAC Group M05:

chlorothalonil (Echo 720):1.38 to 2.0 pt/A; PHI 0d, REI 12h. Apply in sufficient water to obtain adequate coverage. Begin applications when dew or rain occur and disease threatens.
chlorothalonil + mefenoxam (Ridomil Gold Bravo SC): 2.5pt/A; PHI 7d, REI 48h, Groups M05 & 4. Begin preventive applications early when conditions are favorable for disease.
chlorothalonil + oxathiapiprolin (Orondis Opti (Premix): 1.75 to 3.6 pt/A; PHI 0d, REI 12h, Groups M05 & 49.
chlorothalonil + zoxamide (Zing!): 30.0 to 36.0 fl oz/A; PHI 5d, REI 12h, Groups M05 & 22.

Tomato Spotted Wilt Virus (TSWV)

Symptoms include numerous small brownish spots, purpling and upward rolling of leaves, and stunted leaves and plants. Fruit symptoms can include yellow ringspots but brown, necrotic sunken areas may form. The host range for TSWV is one of the largest of any virus. Hundreds of plant species are susceptible including many commercial floriculture crops. Do not raise vegetable transplants in the same greenhouse as ornamentals. Monitor thrips and control, as necessary. Some resistant varieties are available. Resistance-breaking strains have been reported in recent years but have not been detected in New England thus far.

Fusarium and Verticillium Wilts (Fusarium oxysporum f. sp. lycopersici and Verticillium spp.)

Symptoms of vascular wilt diseases include stunting, yellowing, and browning of foliage. These symptoms may involve the entire plant, or they may be observed only one side. Plants may be seen to wilt on sunny afternoons and recover at night. Both Fusarium and Verticillium cause brown to black discoloration of the vascular system. Fungicides are marginally effective for vascular wilts, but they may be helpful as part of a comprehensive IPM program. Plant resistant varieties. Pre-plant treatment of soil with effective fumigants will give short-term control but will not completely eliminate the pathogens from fields. Rotate tomatoes with non-host crops such as corn or small grains for at least 4 years. Avoid bringing contaminated soil on equipment to new land.

FRAC Group 3:

flutriafol (Rhyme): 7.0 fl oz/A; PHI 0d, REI 12h. Labeled for Fusarium. Suppression only. Do not make more than 4 applications per year.

FRAC Group 7:

fluopyram (Velum Prime): 3.0 to 6.84 fl oz/A; PHI 0d, REI 12h. For Fusarium only. Soil application. Do not make more than 2 sequential applications before rotating with a fungicide from a different Group.