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2022 Midwest Vegetable Guide

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Fruiting Vegetables – Diseases Midwest Veg Guide 2022 153 Damping-Off Seed and Seedling Rots of Multiple Crops - Multiple Pathogens Non-Pesticide Eggplant, Pepper, Tomato | 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 Aliette WDG (80) (fosetyl-aluminum) Tomato | 2.5-5 lbs. per acre. For Pythium spp., apply 2.5-5 lbs. per acre at 2-4 leaf stage for direct seeded plants or immediately after transplanting. REI: 12-hour. PHI: 14-day. FRAC 33. Apron XL (3) (mefenoxam) Eggplant, Pepper, Tomato | For Pythium damping-off, 0.085 fl. oz. per 100 lb. of seed. REI: 48-hour. FRAC 04. 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. Previcur Flex (6) (propamocarb) Eggplant, Pepper, Tomato | For Pythium spp., apply 1.2 pts. (eggplants or peppers) or 1.5 pts. per acre (tomato) per acre with nozzles directed at base of plants, or via drip irrigation, transplant water or sprinklers. For late blight, 0.7-1.5 pts. per acre. REI: 12-hour. PHI: 5-day. FRAC 28. 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. Regalia (5) (Reynoutria sachalinensis extract) Eggplant, Pepper, Tomato | 1-4 qts. per acre. Use in a program with copper products. For damping-off, | For Fusarium, Pythium, Rhizoctonia spp., use 1-4 qts. per acre. On greenhouse- produced seedlings, drench planting medium with 1-2 qts. per gal. water or dip seedlings in solution of 1-2 qts. per 100 gal. water immediately before transplanting. REI: 4-hour. PHI: 0- day. FRAC P05. OMRI-listed. 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. Serifel (Bacillus amyloliquifaciens strain MBI-600) Eggplant, Pepper, Tomato | 4-16 oz. per acre. Soil treatment in-furrow, drench, shanked in and chemigation applications at 4-16 oz. per acre for Pythium spp. damping-off and other root rots. REI: 4-hour. PHI: 0-day. FRAC 44. OMRI-listed. SoilGard (12) (Gliocladium virens strain GL-21) Eggplant, Pepper, Tomato | 0.5-2 lbs. per acre. Soil treatment in-furrow, drench, shanked in and chemigation applications at 0.5-2 lbs. per acre for Pythium, Rhizoctonia, Fusarium and other spp. causing damping-off and root rots. For greenhouse-grown transplants, drench medium with 2-4 oz. per gal. water. REI: see label. PHI: 0-day. FRAC NC. OMRI-listed. Early Blight of Fruiting Vegetables - Alternaria Fungus This pathogen can infect peppers and tomatoes, but is mainly a problem in tomatoes. This disease initially causes lesions on lower leaves of the tomato plant. After field planting, begin protective fungicide applications on a 7-14 day schedule. May be seedborne. Group 11 Resistance: Strains of the fungus that causes early blight that are resistant to group 11 fungicides have been observed in Indiana and Ohio. Group 11 products labeled for tomato and early blight include Cabrio and Quadris. Tank- mix group 11 fungicides with products that have a different mode of action, or alternate group 11 fungicides with fungicides that have a different group number. Non-Pesticide Eggplant, Pepper, Tomato | Use disease-free seed and transplants. Hot water seed treatment may reduce this seedborne disease. Use temperatures and times of 122 F for 25 minutes for tomato. Avoid fields with a history of Fusarium and Verticillium wilts. Rotate to non-Solanaceous crops for 3-4 years. Varieties with partial resistance are available, and varieties resistant to Fusarium and Verticillium wilt will hold up better against Alternaria. Use raised beds, staking, and mulch to improve drainage, air flow, and reduce splashing. Prompt destruction of the finished crop with tillage to rapidly breakdown tissue is an important method to prevent disease build-up.

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