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2022 Midwest Vegetable Guide

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Cucurbit Crops – Weeds 143 soil. The more quickly vines cover the soil surface, the better they will suppress late-emerging weeds. In-row plant spacing can be decreased to close canopy more quickly. Planting on the square will allow cultivation in two directions. Cucurbits can benefit from the soil warming properties of plastic mulch in addition to the in-row weed control it provides. Materials include landscape cloth/fabric, plastic, and biodegradeable plastic. Straw mulch can delay early season growth by suppressing soil temperatures. Weeds between beds and along the edges of beds can be controlled with a combination of cultivation, mowing, or hand hoeing/pulling. Weeds along the edge of the mulches can be a particular challenge to avoid ripping the mulch. Some fresh market plantings are often small enough to accommodate some hand hoeing or pulling. For larger plantings it may make more sense to mechanically cultivate with tow-able tools between plastic rows or between bare-soil rows. Pesticide Aim EC (2) (carfentrazone) POST Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 0.5-2 fl. oz. per acre. Apply a minimum of 1 day prior to transplanting or 7 days prior to direct-seeding, or apply between crop rows with hooded sprayer. Do not allow spray to contact crop. Add 1 qt. COC (1% v/v) or 0.5 pt. NIS per 25 gal. of spray solution (0.25% v/v). Weeds must be actively growing and less than 4 inches tall. Do not exceed 6.1 fl. oz. per acre per season REI: 12-hour. HRAC 14. Chateau SW (51WDG) (flumioxazin) PRE Cantaloupe/Muskmelon, Watermelon | 4 oz. per acre. For cantaloupe, honeydew, and watermelon in Indiana only (IN 24c accessed through Indiana Vegetable Growers Association): use a shielded or hooded sprayer to apply before transplanting to row middles between plastic mulch- covered raised beds. Bed must be at least 4 inches higher than treated area and at least 24 inches wide. Spray must remain between raised beds and contact no more than the bottom 1 inch of plastic. Do not apply after crops are transplanted. Rainfall or irrigation over beds is required after application but before transplanting. REI: 12-hour. HRAC 14. clethodim products (clethodim) POST Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Use 2EC formulations at 6-8 fl. oz. per acre with 1 qt. COC per 25 gals. of spray solution (1% v/v). Do not exceed 32 fl. oz. per acre per season. Use Select Max at 9-16 fl. oz. per acre with 1 qt. COC (1% v/v) or 0.5 pt. NIS per 25 gals. of spray solution (0.25% v/v). Do not exceed 64 fl. oz. per acre per season. Use lower rates for annual grasses, the high rates for perennial grasses. Spray on actively growing grass. Wait at least 14 days between applications. REI: 24-hour. PHI: 14-day. HRAC 01. Command 3ME (clomazone) PRE Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | For cucumber: use 0.4-1.0 pt. per acre. For cantaloupe/muskmelon and watermelon: use 0.4-0.67 pt. per acre. For summer squash: use 0.67-1.33 pts. per acre. For winter squash and processing pumpkins: use 0.67-2.0 pts. per acre. Not for jack-o-lantern pumpkins. See label for sensitive varieties. Apply prior to seeding or transplanting, or after seeding before crop emergence. Does not control pigweed species. Rates below 1 pt. will only suppress weeds. May cause temporary bleaching of crop leaves. REI: 12-hour. PHI: 30-day for cucumber; 30-day for summer squash; 45- day for winter squash and processing pumpkins. HRAC 13. Curbit EC (3) (ethalfluralin) PRE Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 3-4 pts. per acre. Use lower rates on coarse soils. Direct-seeded crops: apply to soil surface within 2 days after seeding. Do not incorporate. Transplants: apply as a banded spray between rows. Does not control large-seeded broadleaves. Needs 0.5 inch of water within 5 days of application to be effective. If no rain occurs, cultivate shallowly. Do not apply over or under hot caps, row covers, or plastic mulch. Do not broadcast over top of plants. Under cool temperatures may cause crop injury or failure. REI: 24- hour. HRAC 03. Dacthal Flowable (6F) (DCPA) PRE Cantaloupe/Muskmelon, Watermelon | 6-14 pts. per acre. Apply when plants have 4-5 true leaves and growing conditions favor good plant growth. Crop injury may occur if applied under unfavorable growing conditions or earlier than recommended. REI: 12-hour. HRAC 03. Dual Magnum (7.62EC) (s-metolachlor) PRE Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Illinois, Indiana, Michigan, Minnesota, and Ohio only. IL 24c exp. 03/25/24. MI 24c exp. 12/31/21. MN 24c exp. 12/31/25. OH 24c exp. 12/31/22. For cantaloupes/muskmelon and watermelon: use 0.67-1.27 pts. per acre before transplanting or after seeding and before crop emergence. For cucumbers: use 0.67-1.0 pt. per acre after seeding before weeds or crop emerge, or broadcast after cucumbers have 1-2 true leaves. For pumpkins and winter squash: use 1.0-1.33 pts. per acre between rows after seeding and before emergence, or after emergence leaving an untreated area at least 6 inches from planted seed or pumpkin leaves. Broadcast application over top of pumpkin rows after seeding and before crop emergence permitted in all states listed above except Ohio. For summer squash in all states Midwest Veg Guide 2022

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