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2022 Midwest Vegetable Guide

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Fruiting Vegetables – Diseases Midwest Veg Guide 2022 161 20 gals. water per acre incorporated 2-4 inches deep by water or mechanical means, or drip chemigate after transplanting with at least 40 gals. water per acre. Allow 14 days between applications. For eggplants, do not exceed 16 pts. per acre per season. For peppers, do not exceed 24 pts. per acre per season. For tomatoes, do not exceed 32 pts. per acre per season. In Kansas, only drip treatment allowed for eggplant, only low rate allowed for peppers, and up to 8 pts. allowed for tomato drip applications. In Missouri, up to 8 pts. per acre allowed for tomato drip applications. REI: 48-hour. PHI: 7- day for eggplants and peppers, 3-day for tomatoes. IRAC 01A. RUP. Phytophthora Blight of Multiple Crops - Phytophthora Oomycete Phytophthora may cause damping-off, stem infection, and fruit rot in tomatoes and peppers. It is often associated with heavy rains and fields with poor drainage. The first symptoms are usually observed in low areas. It has a wide host range of crops and weeds, including vine crops, beans, nightshades and velvetleaf. Ponds and streams with run-off water from infested soil may be contaminated with Phytophthora. At planting, use a transplant drench to help prevent Phytophthora infection of young plants. At fruit set, apply contact or systemic fungicides at first sign of the disease to prevent fruit rots. Systemic fungicides are available. Non-Pesticide Eggplant, Pepper, Tomato | Rotate to non-Cucurbit, non- Legume, and non-Solanaceous crops for 3 years. Avoid fields with a history of the disease and poor drainage. Use raised beds, staking, and mulch to improve drainage, air flow, and reduce splashing. Do not irrigate with surface water. Pepper varieties with moderate to good resistance to the crown and root rot phase of Phytophthora blight include the Bell-types, Paladin, Aristotle, Archimedes, Revolution, Declaration, Intruder, and Vanguard; Jalapeno-types, Hechicero; and Ancho-type, Sequoia. These varieties are susceptible to the foliar and fruit rot phases of Phytophthora blight. Prompt destruction of the finished crop with tillage to rapidly breakdown tissue is an important method to prevent disease build-up. Anaerobic soil disinfestation (ASD) is an effective sterilization method for greenhouse and high tunnel soils that contain this pathogen. Pesticide Elumin (4SC) (ethaboxam) Eggplant, Pepper | 8 fl. oz. per acre. REI: 12-hour. PHI: 2-day. FRAC 22. Omega 500F (4.17) (fluazinam) Eggplant, Pepper | 16-24 fl. oz. per acre. Apply 24 fl. oz. per acre as a soil drench at transplanting. Then, begin foliar applications using low rates under low disease pressure, and high rates under high disease pressure. REI: 12-hour. PHI: 30-day. FRAC 29. Orondis Gold (DC) (oxathiapiprolin, mefenoxam) Eggplant, Pepper, Tomato | 28-55 fl. oz. per acre. Use as an at-plant soil drench, banded spray in furrow, or through drip irrigation. Do not follow soil applications of Orondis Gold with foliar applications of Orondis Opti, or Orondis Ultra. REI: 4-hour. PHI: 7-day. FRAC 49, FRAC 04. Orondis Ultra Premix (SC) (oxathiapiprolin, mandipropamid) Tomato | 5.5-8.0 fl. oz. per acre. Alternate with fungicides that have a different mode of action. Use either soil applications or foilar applications of oxathiapiproplin products, but not both. REI: 4-hour. PHI: 1- 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) Pepper, Tomato | 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) Eggplant, Pepper, Tomato | 3- 4 fl. oz. per acre. Must be tank-mixed with a product with a different mode of action. REI: 12-hour. PHI: 2-day. FRAC 43. Ranman 400SC (34.5) (cyazofamid) Eggplant, Pepper, Tomato | 2.1-2.75 fl. oz. per acre. For Buckeye rot and Phytophthora blight, apply to base of plant or in transplant water. Another formulation is Segway O. REI: 12-hour. PHI: 0-day. FRAC 21. Revus (2.08SC) (mandipropamid) Eggplant, Pepper | 8 fl. oz. per acre. Phytophthora blight suppression only. REI: 4- hour. PHI: 1-day. FRAC 40. Ridomil Gold SL (4SC) (mefenoxam) Eggplant, Pepper, Tomato | 1 pt. per acre. Soil treatment at 1 pt. per acre broadcast (use less for band applications) before transplanting. Subsequent directed sprays may be needed. Phytophthora crown rot only. Fungicides will not be effective if plants are planted in poorly drained fields with a history of the disease. Damping-off treatments for tomato are 1-2 pts. per acre. Other formulations include MetaStar, Subdue Maxx, Ultra Flourish, and Xyler. Rates vary by formulation. REI: 48-hour. PHI: 7-day. FRAC 04. Zampro (SC) (ametoctradin, dimethomorph) Eggplant, Pepper, Tomato | 14 fl. oz. per acre. REI: 12-hour. PHI: 4- day. FRAC 45, FRAC 40.

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