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Cucurbit Crops – Diseases 128 Midwest Veg Guide 2022 applications. Do not follow soil applications of Orondis Gold. REI: 12-hour. PHI: 0-day. FRAC 49, FRAC M05. Orondis Ultra Premix (SC) (oxathiapiprolin, mandipropamid) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 5.5-8.0 fl. oz. 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: 4-hour. PHI: 0-day. FRAC 49, FRAC 40. phosphite and phosphorous acid products (phosphorous acid, potassium phosphite, mono-dipotassium salts of phosphorous acid, mono- and dibasic sodium, potassium, and ammonium phosphites, fosetyl-aluminum) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Several phosphite or phosphorus acid products (Aliette, Phostrol, ProPhyt, Rampart) are labeled at various rates. Label includes different crops, PHIs, resistance instructions, and other important information. Some manufacturers recommend tank-mixing. These products may be used in a preventative program until the disease is observed. REI: 4 to 12-hour. FRAC 33. Presidio (4SC) (fluopicolide) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 4 fl. oz. per acre. REI: 12-hour. PHI: 2-day. FRAC 43. Previcur Flex (6) (propamocarb) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | For Pythium in the field, apply 0.6-1.2 pts. per acre directed to base of plant and surrounding soil, or through drip irrigation or transplant water. In the greenhouse, maintain a 1:1000 stock solution of 12.8 fl. oz. per 100 gals. of water. Use that stock at 3.4-6.8 fl. oz per plant. REI: 12-hour. PHI: 2-day. FRAC 28. Ranman 400SC (34.5) (cyazofamid) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 2.75 fl. oz. per acre. Mixing Ranman with a nonionic surfactant may increase efficacy. REI: 12-hour. PHI: 0-day. FRAC 21. Revus (2.08SC) (mandipropamid) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 8 fl. oz. per acre. Suppression only. REI: 4-hour. PHI: 0-day. FRAC 40. Zampro (SC) (ametoctradin, dimethomorph) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 14 fl. oz. per acre. REI: 12-hour. PHI: 0-day. FRAC 45, FRAC 40. Zing! (zoxamide, chlorothalonil) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 36 fl. oz. per acre. REI: 12-hour. PHI: 0-day. FRAC 22, FRAC M05. Fruit Rot of Cucurbits - Fusarium Fungus Fruit with Fusarium fruit rot are often observed from fields where other disease or cultural problems are present. May be seedborne. Non-Pesticide Cantaloupe/Muskmelon, Pumpkin | Avoid fields with a history of the disease and excess water. Improve drainage with raised beds. Rotate to non-Cucurbit crops for >4 years. Manage foliar diseases for better fruit health. Fusarium Wilt of Vine Crops - Fusarium Fungus Non-Pesticide Cantaloupe/Muskmelon, Watermelon | Avoid fields with a history of the disease and excess water. Improve drainage with raised beds. Rotate to non-Cucurbit crops for 5-7 years. Resistant varieties are available. Pesticide Proline 480SC (4) (prothioconazole) Watermelon | 5.7 fl. oz. per acre. May be applied by ground or chemigation application equipment. Do not use in water used for hand transplanting REI: 12-hour. PHI: 7-day. FRAC 03. VAPAM HL (4.25L) (metam sodium) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 37.5-75 gals. per acre. Use high rates on muck, and lower rates on sands. In the fall, when soil at 6 inches is above 50 F and moist, place VAPAM HL or Sectagon K42 about 8 inches beneath the surface through shank-injectors, or broadcast sprayers directly in front of tillage tools to bury it. Seal with soil packing or irrigation. Or, in the spring, it can be applied through drip irrigation under unperforated plastic beds. Before planting, allow product to dissipate for 1 week for every 10 gals. per acre plus 1 more week. REI: 5-day. IRAC 08F, FRAC M03, HRAC NC. RUP. Gummy Stem Blight/Black Rot of Cucurbits - Didymella Fungus Gummy stem blight may occur on cucurbits from transplant through harvest. The leaves and stems may be affected. Occasionally, fruit are affected, which is known as black rot. The black rot phase of the disease is more common in pumpkins than the gummy stem blight phase. May be seedborne.