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2022 Midwest Vegetable Guide

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Cole Crops and Brassica Leafy Greens – Diseases Midwest Veg Guide 2022 105 Pesticide Blocker 4F (PCNB) Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens | 2.8- 3.75 gals. per acre of 4F formulation or 3.4 lbs. per 1,000 feet of linear row of 10G formulation. See label for other application methods and rates. The 10G formulation is labeled for wirestem and bottom rot on cauliflower only. REI: 12-hour. FRAC 14. Endura (WG) (boscalid) Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens | 6-9 oz. per acre. Suppression only for bottom rot and powdery mildew. REI: 12-hour. PHI: 14-day for collard, kale and mustard; 0-day for broccoli, Brussels sprouts, cabbage and cauliflower. FRAC 07. Club Root of Brassicas - Plasmodiophora Fungus Club root is a long-surviving pathogen that can live on some grasses, clovers, weeds, and other plants, which makes crop rotation difficult. The disease tends to be more prevalent in soils with acidic pH. Non-Pesticide Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens, Turnip Greens | Use disease-free transplants. Choose resistant varieties. Rotate to a non-Brassica crop for 5-7 years. Avoid poorly drained soils with a history of club root. Serious losses can be avoided by raising the pH to 7.2 -7.3. Pesticide Blocker 4F (PCNB) Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens | 3 pts. per acre of 4F formulation or 5.15 lbs. per 1,000 feet of linear row of 10G formulation. See label for other application methods and rates. REI: 12-hour. FRAC 14. Omega 500F (4.17) (fluazinam) Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens | 6.45 fl. oz. per 100 gals. of water. Apply 3.4 fl. oz. of soulution to each plant applied as a transplant soil drench. REI: 12-hour. PHI: 50-day for heading vegetables. FRAC 29. Damping-Off Seed and Seedling Rots of Multiple Crops - Multiple Pathogens Non-Pesticide Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens, Turnip Greens | 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 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) Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens | 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. PHI: 0-day. FRAC 33. Downy Mildew of Brassicas - Hyaloperonospora Oomycete May be seedborne. Non-Pesticide Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens, Turnip Greens | Use disease-free seeds and transplants. Hot water seed treatment may help to reduce this seedborne pathogen. Use temperatures and times of 122 for 25 minutes for Brussels sprouts and cabbage, 122 for 15 minutes for mustard greens, and 122 for 20 minutes for other Brassicas. Resistant broccoli varieties are available. Rotate to a non-Brassica crop for 2-3 years. Prompt destruction of the finished crop with tillage to rapidly breakdown tissue is an important method to prevent disease build-up. Pesticide Actigard (0.5WDG) (acibenzolar-s-methyl) Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens, Turnip Greens | 0.5-1.0 oz. per acre. Suppression only. Do not apply to stressed plants. REI: 12-hour. PHI: 7-day. FRAC P01. azoxystrobin products (azoxystrobin) Broccoli, Brussels sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard Greens, Turnip Greens | Use 2 lb. a.i. per gallon formulations (Quadris) at 6.0-15.5 fl. oz. per acre. Use 3.3 lb. per gallon formulations (Azteroid) at 3.9-9.7 fl. oz. per acre. Use 0.5 lb. per gallon formulations (Heritage) on greenhouse transplants only at 0.08-0.18 oz. per 1,000 sq. ft. REI: 4-hour. PHI: 0-day. FRAC 11.

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