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2022 Midwest Vegetable Guide

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Celery – Diseases 90 Midwest Veg Guide 2022 Aster Yellows (Purple-Top Wilt) of Multiple Crops - Phytoplasma Mollicutes Pesticide Insecticides | Use an insecticide to control leafhoppers that transmit the disease. Leafhoppers must be controlled before they feed. See Insect section. Bacterial Blight of Celery - Pseudomonas Bacteria Symptoms include leaf blight and extensive leaf death that requires additional trimming at harvest, resulting in yield loss. May be seedborne. Non-Pesticide Use disease-free seed. Hot water seed treatment may reduce this seedborne disease. Use temperatures and times of 118 F for 30 minutes for celery. Rotate to non-host crops for 2 years. Varieties with partial resistance are available. Prompt destruction of the finished crop with tillage to rapidly breakdown tissue is an important method to prevent disease build-up. Pesticide copper products (copper hydroxide, copper octanoate, copper oxychloride, copper sulfate, copper diammonium diacetate complex, cuprous oxide) | Several formulations of copper (Badge, Champ, Kocide) are labelled for use and may slow the spread of bacterial blight. See label for directions. REI: 4 to 48-hour. PHI: 0-day. FRAC M01. OMRI-listed. Crater Rot of Celery - Rhizoctonia Fungus Non-Pesticide Clean and sanitize transplant trays, benches, and tools. Rogue infected transplants. Avoid working field under wet conditions. Prompt destruction of the finished crop with tillage to rapidly breakdown tissue is an important method to prevent disease build-up. Pesticide azoxystrobin products (azoxystrobin) | Products include AzoxyStar, AframeTM , Satori Fungicide , Gold Rush, Dexter SC, Quadris Flowable, Acadia 2 SC, Heritage, Tetraban Fungicide, Willowood Azoxy 2SC. See product labels for various rates. REI: 4-hour. PHI: 0-day. FRAC 11. Catamaran (potassium phosphite, chlorothalonil) | 4-5 pts. per acre. REI: 12-hour. PHI: 7-day. FRAC 33, FRAC M05. chlorothalonil products (chlorothalonil) | Several formulations of chlorothalonil (Bravo, Echo, Equus) are labeled at various rates. See label for directions. REI: 12- hour. PHI: 7-day. FRAC M05. Evito (3.98SC) (fluoxastrobin) | Rate depends on formulation. Also available as Tepera and Aftershock. Do not apply more than 4 applications per acre per year, with a minimum re-treatment interval of 7-day between applications REI: 12-hour. PHI: 3-day. FRAC 11. Luna Sensation (fluopyram, trifloxystrobin) | 5.8 fl. oz. per acre. Apply using ground, aerial or chemigation equipment. Apply at the critical timings for disease control. Refer to university and/or extension guidelines for best application timings. Continue as needed on a 14-day interval. Do not apply more that 15.3 fl. Oz. of Luna Sensation per acre per year. Do not make more than 2 sequential application of Luna sensation or any group 7 or group 11 containing fungicide before rotating with fungicide from a different Group. REI: 12-hour. FRAC 07, FRAC 11. 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) | Rates vary depending on formulation. REI: 4 to 12-hour. PHI: 0- day. FRAC 33. Quadris Opti (SC) (azoxystrobin, chlorothalonil) | 2.4-3.7 pts. per acre. REI: 12-hour. PHI: 7-day. FRAC 11, FRAC M05. Damping-Off Seed and Seedling Rots of Multiple Crops - Multiple Pathogens Michigan State University research has found Pythium spp. causing damping-off of celery in greenhouses can result in poor field establishment. Non-Pesticide 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 Ridomil Gold SL (4SC) (mefenoxam) | 1-2 pts. per acre. Preplant incorporated (broadcast or band): Apply as a soil application in sufficient water or liquid fertilizer to provide

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