Disease Control

NOTE: For the disease control products listed below, one product trade name and formulation is provided for each active ingredient (common name) as an example of rates, preharvest interval (PHI), restricted entry interval (REI), and special instructions. In many cases, there are other products available with the same active ingredient. Please see Table 28 and Fungicides and Bactericides Alphabetical Listing by Trade Name for more information on products with the same active ingredients.

The symbol OG   indicates a product is listed by the Organic Materials Review Institute (OMRI) as approved for use in organic production. See Organic Certification section for more details.

Anthracnose (Colletotrichum species)

Anthracnose is a problem on fruit when it ripens on the plant, but the fungus can also invade the stem tissues resulting in premature death. Rotate crops such that non-host crops are grown at least every other year. Control weed hosts. 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 (i.e., TOMCAST). Disease development, based on weather conditions near your farm, can be monitored on-line (www.newa.cornell.edu).

azoxystrobin (Quadris): 6.0 to 15.0 fl oz/A; PHI 0d, REI 4h, Group 11.  Do not rotate with other Group 11 fungicides. See label for precautions.

azoxystrobin plus chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M5. See label for tank mix precautions.  

azoxystrobin plus difenoconazole (Quadris Top): 8.0 fl oz/A; PHI 0d, REI 12h,Groups 11 & 3.

azoxystrobin plus flutriafol (Topgard EQ): 4.0 to 8.0 oz/A; PHI 0d, REI 12h, Groups 3 & 11. See label for tank mix precautions.

chlorothalonil (Bravo Weather Stik): 2.0 to 2.75 pt/A; PHI 0d, REI 12h, Group M5.

chlorothalonil plus phosphorous acid (Catamaran): 7.0 pt/A; PHI 0d, REI 12, Groups M5 & 33. Apply to fruit. See label for restrictions.

chlorothalonil plus zoxamide (Zing!): 36.0 fl oz/A; PHI 7d, REI 12, Groups M5 & 22.

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h, Group M1. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette.

difenoconazole plus benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12h. Groups 7 & 3. Do not make more than 2 applications before switching to a non-Group 7 fungicide.

difenoconazole plus 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 2 inches (cherry tomatoes).

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

flutriafol (Rhyme): 5.0 to 7.0 fl oz/A; PHI 0d, REI 12, Group 3.

fluxapyroxad plus propiconazole (Priaxor): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11.

hydrogen dioxide plus peroxyacetic acid (Oxidate 2.0OG): 0.25 to 2.5% v/v solution; PHI 0d, REI 1h, Group 33. Labeled as preventive and curative. See label for specific application instructions and dilution rates.

mancozeb (Dithane DF Rain Shield): 1.2 to 2.4 qt/A; PHI 5d, REI 24h, Group M3.

mancozeb plus copper hydroxide (ManKocide): 1.7 lb/A (processing); 1.0 to 3.0 lb/A (fresh market); PHI 5d, REI 48h, Groups M3 & M1.  

mandipropamid plus difenconazole (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.

polyoxin D (OSO 5%SC): 3.75 to 13.0 fl oz/A; PHI 0d, REI 4h, Group 19.

pyraclostrobin (Cabrio EG): 8 to 12 oz/A; PHI 0d, REI 12h, Group 11. Apply only 6 applications per season or 96 oz/A. Do not rotate with other Group 11 fungicides.

tetraconazole (Mettle 125ME): 6.0 to 8.0 oz/A; PHI 0d, REI 12h, Group 3. Begin application before disease onset. Make no more than 2 consecutive applications. See label for restrictions.

ziram (Ziram 76 DF): 3 to 4 lb/A; PHI 7d, REI 48h, Group M3. Do not use on cherry tomatoes. See label for restrictions.

Gray Mold (Botrytis cinerea)

Grey mold is a common disease of tomato and is particularly damaging in greenhouses where the relative humidity is high. The pathogen infects leaves, stems, petioles, and fruit. Ghost Spots develop when the pathogen invades the fruit then ceases growth prior to causing decay; the resulting white to yellow rings make fruit unmarketable. Injured transplants can develop gray mold infections of the stem which girdle the plant and cause plant death. Reduce plant wetness by avoiding overhead irrigation. 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 labveled for leaf spots will also provide some control for gray mold. See: Leaf Spots.

Ulocladium oudemansii (BotryStopOG): 2.0 to 4.0 lbs/A; PHI 0d, REI 4h, Group NC. Begin application when conditions are conducive to disease development.

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

Early blight and Septoria leafspot are very destructive of tomato. Both diseases may occur together, and both may be seed-borne. Hot water treat seeds at 122oF for 25 minutes. Plow under plant debris after harvest. Rotate away from tomatoes for at least 2 years. Provide optimum nutrition throughout the season. 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 on-line (www.newa.cornell.edu).

azoxystrobin (Quadris): 5 to 6.2  fl oz/A; PHI 0d, REI 4h, Group 11. Do not apply more than 1 application of Quadris before alternating with a fungicide that has a different mode of action. See label for other precautions.

azoxystrobin plus chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M5. See label for tank mix precautions.  

azoxystrobin plus difenoconazole (Quadris Top): 8.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3.

azoxystrobin plus flutriafol (Topguard EQ): 4.0 to 8.0 oz/A; PHI 0d, REI 12h, Group 3 & 11.

Bacillus mycoides Isolate J (LifeGardOG): 4.5 oz/100 gal water; PHI 0d, REI 4, Group P6.

Bacillus pumilis Strain QST 2808 (SonataOG): 2.0 to 4.0 qt/A; PHI 0d, REI 4, Group 44.

Bacillus subtilis Strain QST 713 (Serenade OptiOG): 14.0 to 20.0 oz/A; PHI 0d, REI 4, Group 44. Not for Septoria leaf spot.

chlorothalonil (Bravo Weather Stik): 1 3/8 to 2.0 pt/A; PHI 0d, REI 12h, Group M5.

chlorothalonil plus phosphorous acid (Catamaran): 4.5 to 5.0 pt/A (foliage), 7.0 pt/A (fruit); PHI 0d, REI 12h, Groups M5 & 33.

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h, Group M1. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette.

cyprodinil plus fludioxonil (Switch 6.25 WG): 11.0 to 14.0 oz/A; PHI 0d, REI 12h, Groups 9 & 12.

difenoconazole plus benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12. Groups 7 & 3. Do not make more than 2 applications before switching to a non-Group 7 fungicide.

difenoconazole plus 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 inches (cherry tomatoes).

famoxadone plus 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 with a different mode of action and alternated with a fungicide from a different group (FRAC Code) after one application. Do not alternate with Quadris, Cabrio, or Flint.

fenamidone (Reason 500 SC): 5.5 to 8.2 fl oz/A; PHI 14d, REI 12h, Group 11. Do not make more than one application before rotating to a fungicide from a different resistance management group (not Group 11).

fluopyram plus pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Group 7 & 9.

flutriafol (Rhyme): 3.5 to 7.0 fl oz/A; PHI 0d, REI 12, Group 3.

fluxapyroxad plus propiconazole (Priaxor): 4.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11.

hydrogen dioxide plus peroxiacetic acid (Oxidate 2.0OG): 0.25 to 2.5% v/v solution; PHI 0d, REI 1h, Group P7. Use as a preventive or curative. See label for application instructions and specific dilution rates.

mancozeb (Dithane F45): 1.2 to 2.4 qt/A; PHI 5d, REI 24h, Group M3.

mancozeb plus copper hydroxide (ManKocide): 1.7 lb/A (processing); 1.0 to 3.0 lb A (fresh market); PHI 5d, REI 48h, Groups M3 & M1.  

mancozeb plus zoxamide (Gavel 75DF): 1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups M3 & 22. Add Latron surfactants to improve performance.

mandipropamid plus difenconazole (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.

penthiopyrad (Fontelis): 16.0 to 24.0 fl oz/A; PHI 0d, REI 1h, Group 7.

polyoxin D (OSO 5%SC): 3.75 to 13.0 fl oz/A; PHI 0d, REI 4h, Group 19.

propamocarb HCl (Previcur Flex): 0.7 to 1.5 pt/A; PHI 5d, REI 12h, Group 28.

pyraclostrobin (Cabrio EG): 8.0 to 12.0 oz/A; PHI 0d, REI 12h, Group 11.  Do not rotate with other Group 11 fungicides.

pyrimethanil (Scala SC): 7.0 fl oz/A; PHI 1d, REI 12h, Group 9.  Use only in a tank mix with another fungicide labeled for control of early blight. Using with a protectant fungicide (M3 or M5) will expand the spectrum of activity adding control of late blight and Septoria leaf spot.

tetraconazole (Mettle 125ME): 6.0 to 8.0 oz/A; PHI 0d, REI 12h, Group 3. Begin application at onset of disease. Do not make more than two consecutive applications before switching to different Group.

trifloxystrobin (Flint): 2.0 to 3.0 oz/A; PHI 3d, REI 12h, Group 11. Do not rotate with other Group 11 fungicides.

ziram (Ziram 76 DF): 3.0 to 4.0 lb/A; PHI 7d, REI 48h, Group M3.

Late Blight (Phytophthora infestans)

Protectant fungicides are a key tool for management; however, many strains of P. infestans have become resistant to mefenoxam. When resistant strains are present,  some newer foliar fungicides (higher group numbers) will give as much, or more protection, against late blight as mefenoxam combinations. Several forecasting systems can be used for identifying late blight infection periods. Disease development, based on weather conditions near your farm, can be monitored on-line (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.

ametoctradin plus dimethomorph (Zampro): 14.0 fl oz/A; PHI 4d, REI 12h, Groups 45 & 40.

azoxystrobin (Quadris): 6.2 fl oz/A; PHI 0d, REI 4h, Group 11. Do not rotate with other Group 11 fungicides. See label for precautions.

azoxystrobin plus chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M5. See label for tank mix precautions. 

Bacillus amyloliquefaciens strain D747 (DoubleNickel 55OG): 0.25 to 3.0 lb/A; PHI 0d, REI 4 h, Group 44. Use for disease suppression only. For improved control; mix or rotate with a chemical fungicide.

Bacillus mycoides Isolate J (LifegardOG): 4.5 oz/100 gal of water/A; PHI 0d, REI 4h, Group P6.

chlorothalonil (Bravo Weather Stik): 1 3/8 to 2.0 pt/A; PHI 0d, REI 12h, Group M5.

chlorothalonil plus phosphorous acid (Catamaran): 4.5 to 5.0 pt/A (foliage), 7.0 pt/A (fruit); PHI 0d, REI 12h, Groups M5 & 33.

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h, Group M1. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette.

cyazofamid (Ranman): 2.1 to 2.75 fl oz/A; PHI 0d, REI 12h, Group 21.  Begin applicatons when forecast systems (NEWA) predict disease infection periods. Use the lowest rates and longest intervals when disease pressure is low. Use the highest rates and shortest spray intervals when late blight is present in the area. Do not make more than 3 consecutive sprays, then follow with three or more applications of fungicides with a different Group #. If other diseases are present, tank mix with a Group M3 or M5 fungicide.

cymoxanil (Curzate 60 DF): 3.2 to 5.0 oz/A; PHI 3d, REI 12h, Group 27. Use only in combination with a labeled rate of a protectant fungicide (copper, chlorothalonil).

cymoxanil plus chlorothalonil (Ariston): 1.9 to 3.0 pt/A (foliage); 1.9 pt/A (fruit); PHI 3d, REI 12h, Groups 27 & M5.

dimethomorph (Forum): 6  fl oz/A; PHI 4d, REI 12h, Group 40. Must be applied as a tank mix with another fungicide with a different mode of action. Do not make more than two consecutive applications of Forum before alternating to a non-Group 15 fungicide.

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

fenamidone (Reason 500 SC): 5.5 to 8.2 fl oz/A; PHI 14d, REI 12h, Group 11. Do not make more than one application before rotating to a fungicide from a different resistance management group (not Group 11).

fluopicolide (Presidio): 3.0 to 4.0 fl oz/A; PHI 2d, REI 12h, Group 43. Must be tank mixed with a fungicide with a different mode of action.

mancozeb (Dithane Rain Shield F45): 1.2 to 2.4 qt/A; PHI 5d, REI 24h, Group M3.

mancozeb plus copper hydroxide (ManKocide): 1.7 lb/A (processing); 1.0 to 3.0 lb A (fresh market); PHI 5d, REI 48h, Groups M3 & M1.   

mandipropamid plus 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

mefenoxam plus chlorothalonil (Ridomil Gold Bravo): 2.5 pt/A; PHI 5d, REI 48h, Groups 4 & M5.

mefenoxam plus manzate (Ridomil Gold MZ): 2.5 lb./A; PHI 5d, REI 48h, Groups 4 & M3.  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.

oxathiapiprolin plus chlorothalonil (Orondis Opti): 1.75 to 2.25 pt/A; PHI 0d, REI 12h, Groups M5 & 49.

oxathiapiprolin (Orondis Ultra A): 2 to 4 fl oz/A; PHI 0d, REI 4h, Group 49.

phosphorus acid (ProPhyt): 4.0 pt/A; PHI 0d, REI 4h, Group 33. Apply at first report of late blight in your area and use shortest interval. Thorough coverage is essential. Apply in tank mix with contact products like chlorothalonil (Group M5) or mancozeb (Group M3). Read label: rates vary between products.

polyoxin D (OSO 5% SC): 3.75 to 13.0 fl oz/A; PHI 0d, REI 4h, Group 19.

propamocarb HCl (Previcur Flex): 0.7 to 1.5 pt/A; PHI 5d, REI 12h, Group 28.

pyraclostrobin (Cabrio EG): 8.0 to 16.0 oz/A; PHI 0d, REI 12h, Group 11. Do not rotate with other Group 11 fungicides.

trifloxystrobin (Flint): 4.0 oz/A; PHI 3d, REI 12h, Group 11. Apply in a tank mixture with 75% of a labeled rate of a protectant fungicide. Do not rotate with other Group 11 fungicides.

zoxamide + chlorothalonil (Zing!): 36.0 fl oz/A; PHI 5d, REI 12h, Groups 22 & M5.

zoxamide plus mancozeb (Gavel 75 DF): 1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups 22 & M3.

Phytophthora Blight and Fruit Rot (P. capsici) and Pythium species)

Phytophthora fruit infections are called buck-eye rot and Pythium fruit infections, which usually infect ripe fruit, are called watery rot. To avoid fruit rots, keep plant tops dry by avoiding overhead irrigation or by using buried drip irrigation. Prepare the soil and beds 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 Late Blight and Pepper Phytophthora sections.

Powdery Mildew (Oidium neolycopersici)

Powdery mildew is a relatively new disease of tomato in the Eastern United States. It is more common in the greenhouse than in the field, but in either case it can cause early plant senescence and reduced yields. Powdery mildews are obligate parasites and survive on overwintering tomato, alternate weed hosts, or perhaps as sexual fruiting bodies. Promptly plow under tomato crop debris after harvest. Control volunteer tomatoes and Solanaceous weeds.

azoxystrobin (Quadris): 5.0 to 6.2 oz/A; PHI 0d, REI 14h, Groups 11.

azoxystrobin plus chlorothalonil (Quadris Opti): 1.6 pt/A; PHI 0d, REI 12h, Groups 11 & M5. See label for tank mix precautions.

azoxystrobin plus flutriafol (Topguard EQ): 4.0 to 8.0oz/A; PHI 0d, REI 12h, Groups 11 & 3. See label for tank mix precautions.

Bacillus pumilis Strain QST 2808 (SonataOG): 2.0 to 4.0 qt/A; PHI 0d, REI 4, Group 44.

botanical oil (cottonseed, corn, garlic) (Mildew Cure): 1 gal/100 gal water; PHI 0d, REI 0h, Group NC.

cyprodinil plus fludioxonil (Switch 6.25 WG): 11.0 to 14.0 oz/A; PHI 0d, REI 12h, Groups 9 & 12.

difenoconazole plus benzovindiflupyr (Aprovia Top): 10.5 to 13.5 fl oz/A; PHI 0d, REI 12. Groups 7 & 3. Do not make more than 2 applications before switching to a non-Group 7 fungicide.

difenoconazole plus 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 inches (cherry tomatoes).

fluopyram plus pyrimethanil (Luna Tranquility): 11.2 fl oz/A; PHI 1d, REI 12h, Group 7 & 9. For disease suppression. See label for application timing.

flutriafol (Rhyme): 5.0 to 7.0 fl oz/A; PHI 0d, REI 12h, Group 3.

fluxapyroxad plus propiconazole (Priaxor): 6.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11.

hydrogen dioxide plus peroxiacetic acid (Oxidate 2.0OG): 0.25 to 2.5% v/v solution; PHI 0d, REI 1h, Group P7. Use as a preventive or curative. See label for application instructions and specific dilution rates.

mandipropamid plus 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.

metrafenone (Vivando): 15.4 fl oz/A; PHI 0d, REI 12 hr, Group U8.

myclobutanil (Rally 40WSP): 2.5 to 4.0 oz/A; PHI 0d, REI 24h, Group 3. Observe a 30-day plant-back interval between last spray and the planting of new crops.

paraffinic oil (JMS Stylet-Oil): 3.0 to 6.0 qt/100 gal water; PHI 0d, REI 4h, Group NC.  Spray for thorough coverage of upper leaf surface. An organic formulation is available.

polyoxin D (OSO 5%SC): 3.75 to 13.0 fl oz/A; PHI 0d, REI 4h, Group 19.

potassium bicarbonate (MilStopOG): 2.5 to 5.0 lb/100 gal water/A; PHI 0d, REI 1h, Group NC.  Use solution within 12 hours of preparation. Thorough crop coverage is required. See label.

sulfur (Microthiol DisperssOG): 5 to 20 lb/A; PHI 0d, REI 24h, Group M2. Do not apply when temperatures will exceed 90°F within three days of application.

tetraconazole (Mettle 125ME): 3.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Group 3. See label for restrictions.

White Mold, Sclerotinia Blight (Sclerotinia species)

Sclerotinia survives for years in the soil and is particularly destructive to ground tomatoes. Many vegetable crops are hosts. Rotate with corn or other grass species. Do not plant seed that is contaminated with sclerotia (survival structures). Encourage rapid soil drying by irrigating in the morning and/or buried 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, (NOTE: the current Bayer label for Coniothyrium minitans (Contans) does not include tomato).

fluxapyroxad plus propiconazole (Priaxor Xenium): 6.0 to 8.0 fl oz/A; PHI 0d, REI 12h, Groups 7 & 11. Use for suppression only.

fluopyram plus trioflosystrobin (Luna Sensation): 7.6 fl oz/A; PHI 0d, REI 12h, Group 7 & 11. For disease suppression. See label for timing.

Trichoderma asperellum, T. gamsii (Bio-Tam 2.0OG): See label for rates an application methods; PHI 0d, REI 4h, Group NC.

pyraclostrobin (Cabrio EG): 12.0 to 16.0 oz/A; PHI 0d, REI 12h, Group 11. Suppression only.

Bacterial Canker (Clavibacter), Bacterial Speck (Pseudomonas), and Bacterial Spot (Xanthomonas)

Bacterial canker is the most destructive bacterial disease of tomatoes in our region. All three bacterial diseases may be seed-borne or may overwinter in crop debris in the field. Buy hot-water treated seed or seed certified to be free of bacteria. Hot water seed treatment can be done at home. Treat seed for 25 minutes at 122°F. Some lots of seed can be vulnerable to heat treatment. Always treat a small amount of seed (50 to 100) of each lot before treating the remainder of the lot. See Disease Management. 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.

acibenzolar-S-methyl (Actigard 50 WG): 0.33 to 0.75 oz/A; PHI 14d, REI 12h, Group 21. Apply to healthy, actively growing plants preventively. Plant defense activator.

Bacillus mycoides Isolate J (LifeGardOG): 4.5 oz/100 gal water; PHI 0d, REI 4, Group P6. (Not labeled for bacterial canker).

Bacillus subtilis (SerenadeOG):  See labels for specific instructions; REI 4h, Group 44.

Bacillus subtilis v. amyloliquefaciens (Taegro ECOOG): 2.6 to 5.2 oz/A; PHI 0d, REI 24h, Group NC.

copper hydroxide (Kocide 3000): 0.75 to 1.75 lb/A; PHI 0d, REI 48h, Group M1. Do not apply in a spray solution having a pH less than 6.5 or tank mix with Aliette. An organic formula (Kocide 3000-O) is available.

copper sulfate (Cuprofix Ultra): Rates and REI vary with products - see labels; PHI 0d, REI 48h, Group M1.

famoxadone plus cymoxanil (Tanos): 8 oz/A; PHI 3d, REI 12h, Groups 11 & 27. Must be tank mixed with an appropriate contact fungicide with a different mode of action and alternated with a fungicide from a different group (FRAC Code) after one application.

mancozeb (Dithane Rain Shield F45): 1.2 to 2.4 qt/A; PHI 5d, REI 24h, Group M3. Use a full rate of fixed copper in a tank mix  with half to full rate of Dithane F45.

mancozeb plus copper hydroxide (ManKocide): 1.7 lb/A (processing), 1.0 to 3.0 lb A (fresh market); PHI 5d, REI 48h, Groups M3 & M1.

potassium salts of phosphorous acid plus hydrogen oxide (Oxiphos): 2.5 to 5.0 qt/A; PHI 0d, REI 12h, Group P7. Apply as dilute foliar spray or via irrigation applied immediately after planting. Do not exceed more than 2.5% v/v solution. See label for instructions and restrictions.

streptomycin (Agri-Mycin 17): 0.5 lb/50 gal; REI 12h, Group 25. For use on transplants only, prior to transplanting. NOT for field use.

zoxamide plus mancozeb (Gavel 75 DF): 1.5 to 2.0 lb/A; PHI 5d, REI 48h, Groups 22 & M3.  Use full rate of a fixed copper tank mixed with a full rate of Gavel.

Cucumber Mosaic Virus (CMV)

Many different strains of this virus occur and the host range includes plants in more than 31 different families. In tomato, the symptoms can be confused with Tobacco Mosaic as well as other virus diseases. The disease is spread by several species of aphids in a nonpersistent manner. Reduce weeds, especially chickweed, pokeweed, and milkweed, as much as practical. Insecticides will not control this virus. Isolate tomato fields from cucurbits especially where there has been a history of CMV. Resistant varieties cannot be recommended at this time.

Tobacco and Tomato Mosaic Virus (TMV, ToMV)

Several strains of TMV exist including the closely related tomato (TomMV) strain. Symptoms on tomato can vary considerably as will the severity of disease and the effect on yield. Either strain can be seed-borne or transferred from previously infected plant debris, weeds, transplants, other crops, or workers using tobacco products. Unlike other viruses, TMV and TomMV are easily spread from plant to plant by contact with hands and tools. Insects are not considered to be important vectors. Grow resistant varieties. Control weeds as much as practical. Hands and clothes soiled with tobacco or from weeding 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 Spotted Wilt Virus (TSWV)

Do not raise tomato, pepper, eggplant, or cauliflower transplants in the same greenhouse as ornamentals. Monitor thrips and control as necessary. Resistant varieties are not available at this time. The host range for TSWV is one of the largest of any virus. Hundreds of plant species are susceptible including many commercial floriculture crops.

Wilt (Fusarium and Verticillium)

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 to lower inoculum levels. Avoid bringing contaminated soil on equipment to new land.

Trichoderma asperellum, T. gamsii (Bio-tam 2.0OG): See label for in-furrow, drench, and broadcast rates; PHI 0d, REI 1h, Group NC.