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 detail.

Anthracnose (Colletotrichum coccodes)

Start with certified, disease-free seed, fungicide treated seed, or treat seed with hot water to disinfest. Rotate with non-solanaceous crops for at least 3 years to allow infested crop residues to decompose completely. Keep fields free or solanaceous weeds and volunteers.

azoxystrobin (Quadris): 6.0 to 15.5 fl oz/A; PHI 0d, REI 4h, Group 11. Do not apply more than 1 application or other Group 11 fungicides before alteration with a non-Group 11 fungicide.

azoxystrobin plus difenoconazole (Quadris Top): 8.0 to 14.0 fl oz/A; PHI 0d, REI 12h, Groups 11 & 3. 

chlorothalonil (Bravo Weather Stik): 1.5 pt/A; PHI 3d, REI 12h, Group M5.

copper hydroxide (Kocide 3000): 0.75 to 1.5 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.

flutriafol (Rhyme): 7 fl oz/A; PHI 0d, REI 12h, Group 11.

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.  Do not apply more than 1 application or other Group 11 fungicides before alteration with a non-Group 11 fungicide.

tetraconazole (Mettle 125ME): 6.0 to 8.0 fl oz/A; PHI 0, REI 12, Group 3. Apply no more than twice before alternating to a fungicide with a different MOA (Group #).

trifloxystrobin (Flint Extra): 3 to 4 oz/A; PHI 3d, REI 12h, Group 11. Do not apply more than 1 application or other Group 11 fungicides before alteration with a non-Group 11 fungicide.

Damping-Off

Buy treated seed. Do not use treated seed for food, feed or oil purposes.

fludioxonil (Maxim 4FS): 0.08 to 0.16 oz/100 lb seed; REI 12h, Group 12. For protection against seed-borne and soil-borne fungi. Does not control Pythium and Phytophthora.

thiram (Thiram 42 S): 8 lb/100 lb seed; REI 24h, Group M3

Phytophthora Crown and Fruit Rot (Phytophthora capsici)

Phytophthora capsici cannot be managed by fungicide applications alone; successful disease control is achieved only by a season-long effort to manage water and other cultural practices. The single most effective way to control this disease is to prevent its movement into clean fields by equipment, humans, or infested water. Plant susceptible crops (tomatoes, peppers, eggplant, and all cucurbit species) in fields that have no history of this disease and are well-drained. Plant non-vining crops on raised beds, avoid planting in low areas where water puddles, and improve drainage by sub-soiling after heavy rain events. Promptly disk under small areas where the disease appears along with a border of healthy appearing plants. Avoid working in wet fields and compacting the soil.

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

dimethomorph (Forum): 6.0 fl oz/A; PHI 0d, REI 12h, Group 40. Must be applied in a tank mix with a  fungicide with a different mode of action.

fenamidone (Reason 500 SC): 8.2 fl oz/A; PHI 14d, REI 12, Group 11. For suppression only.

fluazinam (Omega 500): 1 to 1.5 pt/A; PHI 30d, REI 12, Group 29. First application can be made as a soil drench at transplanting.

fluopicolide (Presidio): 3 to 4 fl oz/A; PHI 2d, REI 12h, Group 43. Must be applied in a tank mix with a fungicide with a different mode of action.

mefenoxam (Ridomil Gold SL): 1.0 pt/A preplant or at planting; PHI 7d, REI 48h, Group 4. For crown rot phase only. Apply as a drench at planting or as a banded application. Must be moved into soil mechanically or by irrigation. Use as a preventative, will not cure infected plants.

phosphorus acid (Fosphite): 1 to 3 qts/A; PHI 1d, REI 4h, Group 33. Best efficacy when tank mixed with fungicides with a different mode of action.

Verticillium Wilt

Verticillium species can persist in the soil for many years in the absence of susceptible plants. Follow a 4 to 5-year crop rotation with non-solanaceous crops to reduce inoculum levels in fields.  Include grain crops in the rotation. Control weeds as many weeds are susceptible to Verticillium. Remove and destroy infected plant material after harvest. Resistance to Verticillium species in pepper and eggplant is poor. Fumigate in fall with Vapam as directed on the label. Mulching plants with black plastic may reduce disease severity. See Soil Fumigation, Outdoors.

Trichoderma asperellum, T. gamsii (Bio-tamOG): See label for in-furrow, drench, and broadcast rates; REI 1h, Group NC.