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2022 Midwest Vegetable Guide

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Root Crops – Weeds 265 spring and thoroughly cover to limit attractiveness of rotting vegetation to the first generation of flies to lay eggs on. Pesticide Diazinon AG500 (4ES) (diazinon) Rutabaga | Use 50W formulations at 4-6 lbs. per acre as a pre-plant incorporation and do not exceed 6 lbs. per acre per season. Use AG500 formulations at 2-4 lbs. per acre as a pre-plant incorporation and do not exceed 4 lbs. per acre per season. Use AG600 formulations at 51-102 fl. oz. per acre as a pre-plant incorporation and do not exceed 102 fl. oz. per acre per season. REI: 2 to 4-day. PHI: 14-day. IRAC 01B. RUP. Mustang Maxx (0.8) (zeta-cypermethrin) Beet, Carrot, Celeriac, Horseradish, Parsnip, Radish, Rutabaga, Turnip | 3.2-4.0 fl. oz. per acre. Do not exceed 24 fl. oz. per acre per season. Apply weekly, broadcast applications starting at fly emergence and continuing through the activity period, typically 6 applications. Allow 4 days between applications. Leaves can not be used for food or feed. REI: 12-hour. PHI: 1-day. IRAC 03A. RUP. Root Crops – Weeds Reviewed by Stephen Meyers, Ben Phillips – Sept 2021 Recommended Controls All Weeds Herbicide are not widely labeled across the many root crops. Instead, herbicides are labeled based on the root crop plant families. For example, beets have several herbicides that can be applied over the top of the crop that would damage any other root crop. 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. In fields with lower weed pressure, it may be possible to plant into some emerged weeds, and then use an approved burndown herbicide prior to crop emergence to control emerged weeds. For crops like carrots and parsnips that take a long time to emerge, a burndown application made just prior to crop emergence is especially useful, but it can also pay off for faster-emerging species like radishes or beets. 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 Beet, Carrot, Celeriac, Horseradish, Parsnip, Radish, Rutabaga, Turnip | Weed control in root crops 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 root crops includes basket weeders, narrow-bladed hoes, finger weeders, and others. Prepare a stale seedbed with flaming or very shallow cultivation, instead of herbicides. Pesticide Aim EC (2) (carfentrazone) POST Beet, Carrot, Celeriac, Horseradish, Parsnip, Radish, Rutabaga, Turnip | 0.5-2.0 fl. oz. per acre. Apply with hooded sprayers as a directed application between crop rows. Use COC or NIS. Weeds must be actively growing and less than 4 inches tall. Do not allow spray to contact crop. Do not exceed 6.1 fl. oz. per acre per season. REI: 12-hour. HRAC 14. Caparol 4L (prometryn) POST PRE Carrot, Celeriac | Use lower rates on sandy soils. For carrot: Apply 2-4 pts. per acre preemergence and/or postemergence through the 6-leaf stage of carrot development. Do not exceed 8 pts. per acre per year. For transplanted celeriac: Make a single application of 1.6-4 pts. per acre after crop the crop has 6-8 leaves. REI: 12-hour. PHI: 30-day for carrot, 60-day for celeriac. HRAC 05. clethodim products (clethodim) POST Beet, Carrot, Celeriac, Horseradish, Parsnip, Radish, Rutabaga, Turnip | Use 2EC formulations at 6-8 fl. oz. per acre with 1 qt. of COC per 25 gals. of spray solution (1% v/v). Use Select Max at 9-16 fl. oz. per acre with 8 fl. oz. of NIS per 25 gals. of spray solution (0.25% v/v). Spray on actively growing grass. Use lower rates for annual grasses, the higher rates for perennial grasses. Spray on actively growing grass. Wait at least 14 days between applications. Do not exceed 32 fl. oz. of 2EC formulations or 64 fl. oz. of Select Max per acre per season. REI: 24-hour. PHI: 15-day for radish, 30-day for beet, carrot, celeriac, horseradish, parsnip, rutabaga, and turnip. HRAC 01. Midwest Veg Guide 2022

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