Disease Control

NOTE:  For the products for disease control listed below, one product trade name and formulation is provided for each active ingredient (common name) as an example of rates, days to harvest (dh), REI, and special instructions. In many cases there are other products available with the same active ingredient. Please see Table 22 and Alphabetical Listing by Trade Name for more information on products with the same active ingredients.

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 three 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 (0 dh, REI 4h, Group 11). Apply at the first sign of disease and alternate with chlorothalonil after 7 to 14 days. Do not apply more than 2.88 qt/A. Do not rotate with other strobilurins such as Cabrio.

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

copper hydroxide (Kocide 3000): 0.75 lb/A (0 dh, REI 24h, Group M1). Apply on a 5- to 7-day interval as soon as disease appears.

maneb (Maneb 80 WP): 1.5 to 2 lb/A (5 dh, REI 24h, Group M3). Apply on a 7- to 10-day interval as soon as disease appears.

pyraclostrobin (Cabrio EG): 8 to 12 oz/A (0 dh, REI 12h, Group 11). Apply at the first sign of disease and alternate with chlorothalonil after 7 to 14 days if necessary. Apply only six applications per season or 96 oz/A. Do not rotate with other strobilurins such as Quadris.

Damping-Off

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

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.

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

mefenoxam (Ridomil Gold):  0.5-1 pt/A. (7 dh, REI 48h, Group 4). Crown rot phase only. Apply as a drench at planting or as a banded application. Must be moved into soil mechanically or by irrigation. 

Verticillium Wilt

Verticillium species can persist in the soil for many years in the absence of susceptible plants. Follow a 4-5 year crop rotation with non-solanaceous crops and strawberry to reduce inoculum levels in fields.  Include grain crops in the rotation. Control weeds as many weeds are susceptible to Verticillium. Remove and destroy infested plant material after harvest. Reistance 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.