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Onions and Related Crops – Weeds 230 Midwest Veg Guide 2022 2.5 oz. per acre and do not exceed 9 oz. per acre per season. Observe resistance management restrictions. Allow 4 days between applications. REI: 4-hour. PHI: 1-day. IRAC 05. OMRI-listed. Exirel (0.83SE) (cyantraniliprole) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 13.5-20.5 oz. per acre. Use at 1 thrips per leaf threshold. For suppression only. For best results, use highest rate listed. If thrips populations are high, use Radiant before using Exirel. Tank mix with nonionic surfactant (0.25%-0.5% v/v) for best efficacy. Allow 5 days between applications. Do not make more than 2 consecutive applications before switching to another mode of action. Therefor, do not use in sequence before or after Minecto Pro since it contains the same active ingredient. REI: 12-hour. PHI: 1-day. IRAC 28. Lannate LV (2.4L) (methomyl) Onion (Dry), Onion (Green) | 3 pts. per acre. Do not exceed 18 pts. per acre per season on green bunching onions, or 12 pts. per acre per season on dry bulb onions. REI: 48-hour. PHI: 7-day. IRAC 01A. RUP. Minecto Pro (1.13SC) (cyantraniliprole, abamectin) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 7.0-10 oz. per acre. Use at 1 thrips per leaf threshold. For suppression only. For best results, use highest rate listed. Not for rescue treatments. Tank mix with nonionic surfactant (0.25%-0.5% v/v) for best efficacy. Allow 5 days between applications. Do not make more than 2 consecutive applications before switching to another mode of action. Do not use before or after Exirel or Agri-Mek since these contain the same active ingredients. REI: 12-hour. PHI: 30-day for dry onion, shallots, and garlic.; 7-day for green bunching onion, shallots, and leek IRAC 28, IRAC 06. RUP. Movento (2SC) (spirotetramat) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 5 oz. per acre. Use in June or July when populations reach the 1 thrips per leaf threshold for the first time of the season. Tank mix with nonionic surfactant (0.25%-0.5% v/v) for best efficacy. Allow 7 days between applications. Do not make more than 2 consecutive applications before switching to another mode of action. REI: 24-hour. PHI: 3-day for dry onion, shallots, and garlic.; 7-day for green bunching onion, shallots, and leek IRAC 23. Perm-Up 25DF (permethrin) Garlic, Onion (Dry) | Use 25W, 25WP, and 25DF formulations at 9.6-19.2 oz. per acre for dry onion or 9.6-12.8 oz. per acre for garlic, and not exceed 64 oz. per acre per season for dry onion or 51.2 oz. per acre per season for garlic. Use 3.2EC formulations at 6-12 fl. oz. per acre for dry onion and 6-8 fl. oz. per acre for garlic, and do not exceed 40 fl. oz. per acre per season on dry onion or 32 fl. oz. per acre per season on garlic. Many onion thrips populations have developed resistance to this insecticide, so efficacy may vary. REI: 12-hour. PHI: 1-day. IRAC 03A. RUP. Radiant 1SC (spinetoram) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 6-10 fl. oz. per acre. Use at 3 thrips per leaf threshold. Do not exceed 30 fl. oz. per acre per season or 5 applications. Do not make more than 2 consecutive applications before switching to another mode of action. REI: 4-hour. PHI: 1-day. IRAC 05. Torac (1.29SC) (tolfenpyrad) Garlic, Leek, Onion (Dry), Onion (Green), Shallot | 24 fl. oz. per acre. Do not exceed 72 fl. oz. per acre per year. REI: 12-hour. PHI: 7-day. IRAC 21A, FRAC 39. Warrior II (2.08CS) (lambda-cyhalothrin) Garlic, Onion (Dry) | 1.28-1.92 fl. oz. per acre. Many onion thrips populations have developed resistance to this insecticide so efficacy may vary. Do not exceed 15.36 fl. oz. per acre per season. REI: 24-hour. PHI: 14-day. IRAC 03A. RUP. Onions and Related Crops – Weeds Reviewed by Stephen Meyers, Ben Phillips – Sept 2021 Recommended Controls All Weeds Onions and related crops pose challenges for weed control because the narrow leaves and short height of the crop provide little shade to suppress weed growth, and, except for green onions, the crops grow for several months. Prepare a stale seedbed several weeks in advance of planting, allow weeds to emerge, and kill weeds without bringing new weed seeds to the surface with a burndown herbicide, flame weeder, or very shallow cultivation. For specific weeds controlled by each herbicide, check the Relative Effectiveness of Herbicides for Vegetable Crops table. Rates provided in the recommendations below are given for overall coverage. For a banded treatment, reduce amounts according to the portion of acre treated. Non-Pesticide Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Weed control in onions often relies heavily on cultivation and hand weeding for full season weed control. These operations are most efficient when planting arrangement is designed with weed control in mind and is designed to work with available weed control equipment. Specialized weeding equipment for onions includes basket weeders, narrow-bladed hoes, finger