DISEASE CONTROL TABLE 3-30. DISEASE CONTROL PRODUCTS FOR POTATO (cont'd) S. Rideout, Plant Pathologist, Virginia Tech Disease/Material POWDERY MILDEW azoxystrobin (various) azoxystrobin + chlorothalonil (Quadris Opti) FRAC Code 11 11+M Rate of Material Formulation See label 1.6 pt/acre Minimum Days Harv. 14 14 4h 0.5 Reentry Method, Schedule, and Remarks See label. Rates may vary depending on the product. Apply in furrow at planting according to label direction. Do not apply more than one application without alternating away from fungicides in Group 11. Do not apply more than 1.5 lb a.i./acre/year of azoxystrobin; do not apply more than 11.25 lb a.i./acre/year of chlorothalonil. Do not make more than 1 application before alternating with a fungicide with a different mode of action. Do not apply this product or other fungicides in Group 11 more than 6 times in a season. azoxystrobin + difenoconazole (Quadris Top) 11+3 8 to 14 fl oz/acre 14 0.5 Apply at 7- to 14-day intervals. Apply no more than 2 sequential applications without alternating with a fungicide with a different mode of action. Do not apply more than 55.3 lb product per acre per year. Do not apply more than 0.46 lb a.i./acre/year of difenoconazole-containing products; do not apply more than 2.0 lb a.i./acre /year of azoxystrobin-containing products. fluopyram + pyrimethanil (Luna Tranquility) fluxapyroxad + pyraclostrobin (Priaxor Xemium) mancozeb + azoxystrobin (Dexter Max) mandipropamid + difenoconazole (Revus Top) metconazole (Quash) metiram + pyraclostrobin (Cabrio Plus) penthiopyrad (Vertisan) pyraclostrobin (Headline; Headline SC) sulfur (various) M2 See label - 7+9 7+11 M+11 40+3 11.2 fl oz/acre 6 to 8 fl oz/acre 1.6 to 2.1 lb/acre 5.5 to 7 fl oz/acre 7 7 14 14 0.5 0.5 1 0.5 Do not make more than 2 sequential applications without switching to a fungicide outside of Group 7 or Group 9. Limit 54.7 fl oz/acre/season. Limit 3 applications per season and no more than 2 applications before switching to a different mode of action. Do not apply more than 24 fl oz/ acre/season including in furrow and foliar uses. Do not exceed 16 lbs product/acre/crop. Season limits apply for azoxystrobin. For suppression of powdery mildew. Begin applications when conditions favor disease development, on 7- to 10day intervals. Do not apply more than twice before alternating with fungicides that have a different mode of action. Do not apply more than 28 fl oz per acre per season. 3 M+11 7 2.5 to 4 oz/acre 2.9 lb/acre 10 to 24 fl oz/acre 1 14 7 0.5 1 0.5 Limit 16 oz/acre/season. Make no more than 2 applications before changing modes of action. Limit to 4 applications per year. Use the 4 oz rate for white mold. Apply at 7- to 14-day intervals. Do not apply more than 17.4 lb/acre product per season. Do not apply more than 2 sequential applications before alternating with a fungicide with a different mode of action. Apply at 7- to 14-day intervals. Make no more than 2 applications before alternating with a fungicide with a different mode of action. Do not exceed 72 oz per acre per year. Do not apply more than 11.25 oz a.i. per acre per year in total from any combination of seed, soil, or foliar applications. 11 6 to 12 fl oz/acre 3 0.5 DO NOT exceed more than six foliar applications or 72 total oz of product per acre per season. Do not apply more than one time before alternating with a fungicide with a different mode of action. 1 Rates vary among products; see label. PUMPKIN SEE CUCURBITS WINTER SQUASH SEE CUCURBITS SUMMER SQUASH SEE CUCURBITS RADISH SEE ROOT VEGETABLES RUBARB SEE LEAFY PETIOLE VEGETABLES SCALLION SEE ONION, GREEN SHALLOT SEE ONION, DRY 266 2022 Vegetable Crop Handbook for Southeastern United States