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2022 Midwest Vegetable Guide

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Onions and Related Crops – Diseases Midwest Veg Guide 2022 225 shallots, and garlic; 14-day for green bunching onions and leek. FRAC 04, FRAC M05. Scala (SC) (5) (pyrimethanil) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 18 fl. oz. per acre. Use 9-18 fl. oz. per acre rate when tank mixing with another effective fungicide. REI: 12-hour. PHI: 7-day. FRAC 09. Switch 62.5WG (cyprodinil, fludioxonil) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 11-14 oz. per acre. REI: 12-hour. PHI: 7-day. FRAC 09, FRAC 12. Vangard WG (75) (cyprodinil) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 10 oz. per acre. REI: 12-hour. PHI: 7-day. FRAC 09. Zing! (zoxamide, chlorothalonil) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 30 fl. oz. per acre. REI: 12-hour. PHI: 7-day. FRAC 22, FRAC M05. Leaf Blight of Alliums - Xanthomonas Bacteria Applying fixed copper products may reduce the spread of these bacterial diseases. For emerged annuals, apply before planting or crop emergence. Pesticide copper products (copper hydroxide, copper octanoate, copper oxychloride, copper sulfate, copper diammonium diacetate complex, cuprous oxide) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Several formulations of copper (Badge, Champ, Kocide) are labelled for use and may slow the spread of bacterial blights. See label for directions. REI: 4 to 48-hour. PHI: 0-day. FRAC M01. OMRI-listed. ManKocide (DF) (copper hydroxide, mancozeb) Garlic, Onion (Dry), Shallot | 1.5-2.25 lbs. per acre. REI: 48-hour. PHI: 7-day. FRAC M01, FRAC M03. Leaf Streak of Alliums - Pseudomonas Bacteria Applying fixed copper products may reduce the spread of these bacterial diseases. For emerged annuals, apply before planting or crop emergence. Pesticide copper products (copper hydroxide, copper octanoate, copper oxychloride, copper sulfate, copper diammonium diacetate complex, cuprous oxide) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Several formulations of copper (Badge, Champ, Kocide) are labelled for use and may slow the spread of bacterial blights. See label for directions. REI: 4 to 48-hour. PHI: 0-day. FRAC M01. OMRI-listed. ManKocide (DF) (copper hydroxide, mancozeb) Garlic, Onion (Dry), Shallot | 1.5-2.25 lbs. per acre. REI: 48-hour. PHI: 7-day. FRAC M01, FRAC M03. Neck Rot of Alliums - Botrytis Fungus Treatments for Botrytis leaf blight may retard or prevent symptomless spread of Botrytis neck rot in the field prior to harvest. Non-Pesticide Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Rotate to non-host crop for 3 years. Avoid late-season fertilizer applications or overhead irrigation. Prompt destruction of the finished crop with tillage to rapidly breakdown tissue is an important method to prevent disease build-up. For dry-bulb crops: windrow plants until neck tissues are dry before topping and storage. Cure rapidly and properly. Artificial drying may be necessary (forced heated air at 93-95 degrees F for 5 days). Pesticide chlorothalonil products (chlorothalonil) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Suppression only. Several formulations of chlorothalonil (Bravo, Echo, Equus) are labeled at various rates. See label for directions. REI: 12- hour. PHI: 7-day for dry bulb onion, shallot, and garlic; 14- day for green bunching onion and leek. FRAC M05. Dexter Max (DG) (mancozeb, azoxystrobin) Garlic, Onion (Dry), Shallot | 3.2 lb. per acre. REI: 24-hour. PHI: 7-day. FRAC M03, FRAC 11. Dexter Xcel (mancozeb, azoxystrobin, tebuconazole) Onion (Dry) | 48-72 fl. oz. per acre. REI: See label. PHI: 7- day. FRAC M03, FRAC 11, FRAC 03. Fontelis (1.67SC) (penthiopyrad) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 16-24 fl. oz. per acre. REI: 12-hour. PHI: 3-day. FRAC 07. Gavel 75DF (zoxamide, mancozeb) Garlic, Onion (Dry), Shallot | 1.5-2 lbs. per acre. REI: 48-hour. PHI: 7-day. FRAC 22, FRAC M03. iprodione products (iprodione) Onion (Dry) | Formulations of iprodione include Nevado and Rovral. REI: 24-hour. PHI: 14-day. FRAC 02. Luna Experience (fluopyram, tebuconazole) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 8-12.8 fl. oz. per acre. REI: 12-hour. PHI: 7-day. FRAC 07, FRAC 03.

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