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2022 Midwest Vegetable Guide

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Cucurbit Crops – Diseases 126 Midwest Veg Guide 2022 Pumpkin, Squash, Watermelon | 1.75-2.5 pts. per acre. Make no more than 2 sequential applications before rotating to a different mode of action. When 3 fungicide applications are used, Orondis can be in no more than 33% of the applications. Do not follow soil applications of Orondis Gold. REI: 12-hour. PHI: 0-day. FRAC 49, FRAC M05. Pristine 38WG (boscalid, pyraclostrobin) Cantaloupe/Muskmelon, Cucumber, Watermelon | 12.5-18.5 oz. per acre. REI: 12-hour. PHI: 0-day. FRAC 07, FRAC 11. Quadris Opti (SC) (azoxystrobin, chlorothalonil) Cantaloupe/Muskmelon, Cucumber, Watermelon | 3.2 pts. per acre. REI: 12-hour. PHI: 1-day. FRAC 11, FRAC M05. Quadris Top (SC) (azoxystrobin, difenoconazole) Cantaloupe/Muskmelon, Cucumber, Watermelon | 12-14 fl. oz. per acre. REI: 12-hour. PHI: 1-day. FRAC 11, FRAC 03. Tanos (DF) (famoxadone, cymoxanil) Cantaloupe/Muskmelon, Cucumber, Watermelon | 8 fl. oz. per acre. REI: 12-hour. PHI: 3-day. FRAC 11, FRAC 27. Topsin 4.5FL (thiophanate-methyl) Cantaloupe/Muskmelon, Cucumber, Watermelon | Use 4FL formulation or Cercobin at 10 fl. oz. per acre, or 70WSB formulation at 0.5 lb. per acre. REI: 24-hour to 3-day. PHI: 1- day. FRAC 01. Zing! (zoxamide, chlorothalonil) Cantaloupe/Muskmelon, Cucumber, Watermelon | 36 fl. oz. per acre. REI: 12-hour. PHI: 0-day. FRAC 22, FRAC M05. Bacterial Fruit Blotch of Cucurbits - Acidovorax Bacteria Pesticide Actigard (0.5WDG) (acibenzolar-s-methyl) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 0.5-1 oz. per acre. Apply with two of the fixed copper product applications described for bacterial fruit blotch. REI: 12-hour. PHI: 0-day. FRAC P01. copper products (copper hydroxide, copper octanoate, copper oxychloride, copper sulfate, copper diammonium diacetate complex, cuprous oxide) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Copper products (copper hydroxide, copper octanoate, copper oxychloride, copper sulfate, copper diammonium diacetate complex, cuprous oxide) mixed with mancozeb products (Dithane, Manzate, Penncozeb) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Several formulations of copper (Badge, Champ, Kocide) are labelled for use. See label for directions. Apply fixed copper 2 weeks prior to the opening of the first female bloom until fruit maturity. , at first female bloom, and 2 weeks after the first female bloom. Later in the season, fixed copper products may be applied to help reduce disease spread. No more than 6 applications per season. See labels for directions. REI: 4 to 48-hour. PHI: 0- day. FRAC M01. OMRI-listed. Bacterial Wilt of Cucurbits - Erwinia Bacteria Primarily a disease of cucumber and melon. Pumpkins and squash are only affected when striped and spotted beetles feed on the plants at or before the 5 true leaf stage. Disease control depends on control of striped and spotted cucumber beetles. See insect section. Pesticide Insecticides Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash | Apply systemic insecticides such as Admire or Platinum (see insect section) at transplant. Apply contact insecticides after systemic insecticides after systemic insecticides lose effectiveness (2-3 weeks). Apply foliar insecticides only when cucumber beetles are present. When large numbers are present, treatments may be required twice weekly. Scout fields regularly for cucumber beetles. Damping-Off Seed and Seedling Rots of Multiple Crops - Multiple Pathogens Using treated seed may help reduce the severity of damping- off if used with the cultural methods discussed above. Seed treated with contact fungicides with the active ingredients thiram or captan may help reduce the decay of the seed prior to emergence. Systemic products are designed to move into the seedling and help manage damping-off in the first two to three weeks. Examples of systemic products include Apron XL, Dynasty, and Maxim 4FS. Seed that is treated with all three of these systemic products is available with the trade name Farmore 300. Vegetable seed that is usually transplanted (such as muskmelon and watermelon) are less likely to benefit from fungicide seed treatments than crops that are direct seeded (such as pumpkin). Non-Pesticide Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Practice good greenhouse sanitation of equipment, tools propagation trays/pots, and surfaces. Avoid excess moisture to the transplants in the greenhouse by monitoring irrigation frequency. Plant in warm field soils. The fungi responsible for damping-off in field soils cause more loss when the seedling is slow to emerge. Pesticide Apron XL (3) (mefenoxam) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 0.085-0.64 fl. oz. per 100 lb of seed. Seed treatment will help prevent damping-

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