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Cucurbit Crops – Weeds 142 Midwest Veg Guide 2022 Watermelon | 1-2% by volume. Must contact insect to be effective. REI: 12-hour. PHI: 0-day. IRAC UN, FRAC NC. OMRI-listed. Neemix (0.39) (azadirachtin) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 6-16 fl. oz. per acre. REI: 4-hour. PHI: 0-day. IRAC UN. OMRI-listed. Oberon 2SC (spiromesifen) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 7.0-8.5 fl. oz. per acre. Do not exceed 3 applications per season. REI: 12-hour. PHI: 7-day. IRAC 23. Platinum 2SC (thiamethoxam) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 5-11 fl. oz. per acre. Use 2SC formulations as a soil treatment at 5-11 fl. oz. per acre and do not exceed 11 fl. oz. per acre per season. Use 75SG formulations as a soil treatment at 1.66-3.67 oz. per acre and do not exceed 3.67 oz. per acre per season. Should never be used in combination with insecticide seed treatments. REI: 12-hour. PHI: 30-day. IRAC 04A. Scorpion 35SL (3.24) (dinotefuran) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Soil application: Use Scorpion 35SL at 9.0- 10.5 oz. per acre, or Venom 70SG at 5.0-7.5 oz. per acre. Foliar application: Use Scorpion 35SL at 2.0-7.0 fl. oz. per acre, or Venom 70SG at 1-4 oz. per acre. See pollination precautions. REI: 12-hour. PHI: 21-day for soil application, 1-day for foliar application. IRAC 04A. Sivanto 200 (1.67SL) (flupyradifurone) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 21-28 fl. oz. per acre soil application, or 7-12 fl. oz. per acre foliar application. Should never be used in combination with insecticide seed treatments. REI: 4-hour. PHI: 21-day for soil application, or 1-day for foliar application. IRAC 04D. Venom 70SG (dinotefuran) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | Soil application: 5-7.5 oz. per acre and do not exceed 12 oz. per acre per season. Foliar application: 1-4 oz. per acre and do not exceed 6 oz. per acre per season. See pollination precautions. REI: 12-hour. PHI: 21-day for soil application, 1-day for foliar application. IRAC 04A. Verimark (1.67SC) (cyantraniliprole) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 10.0-13.5 fl. oz. per acre. Apply via drip irrigation or soil injection. Do not exceed 30.65 fl. oz. per acre per season, or 2 applications per season. REI: 4-hour. PHI: 1-day. IRAC 28. Wireworms Pesticide Capture LFR (1.5) (bifenthrin) Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | 0.2-0.39 fl. oz. per 1,000 linear ft. of row. Do not exceed 8.5 fl. oz. per acre per season. REI: 12-hour. IRAC 03A. RUP. Cucurbit Crops – Weeds Reviewed by Stephen Meyers, Ben Phillips – Sept 2021 Recommended Controls All Weeds Weed control methods in cucurbits vary by production system. For cucurbits that are no-till planted into a killed crop (such as a rye cover crop, or wheat) growers often use a burndown herbicide with a preemergence herbicide. For cucurbits planted into tilled soil, growers often combine one or more preemergence herbicides at planting with one or more cultivations. Sometimes, growers also apply a preemergence herbicide at the last cultivation to improve control of late- emerging weeds. Small, emerged weeds in both systems can be controlled with selective postemergence herbicides and/or shielded applications of nonselective herbicides. When cucurbits are transplanted into plastic mulch, some growers apply a preemergence herbicide under the mulch as well as between the rows. Other growers only apply between the rows. Growers may also use one or more cultivations, and if needed, postemergence herbicides or a shielded application of a nonselective herbicide in row middles. 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 Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash, Watermelon | A stale seedbed can be prepared prior to transplanting with flame weeding or very shallow cultivation to control emerged weeds, instead of herbicides. Cucurbits lend themselves to this stale seedbed practice because they are often planted after common weeds have emerged in tilled