| Reduced Risk Status: |
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| IPM Compatibility: |
Per Requester: Very Good Fit; growing need to investigate the potential of metamitron herbicide for use in carrot production, particularly in light of increasing pigweed resistance to linuron, a key herbicide currently used in the crop. This shares structural similarities with metribuzin, which is labeled for postemergence use in carrots after the crop has developed 5 to 6 true leaves. Further research is warranted to evaluate crop safety, application timing, & eff against problematic weed species:06/25; GF:NY:alternative chemistries can reduce the selective pressure placed on linuron & VGF:NJ: excellent crop safety on red beets grown on NJ sandy soils demonstrated in 2024 trials, but addl research is needed to confirm crop safety on carrot under these edaphic conditions, as carrots exhibit greater sensitivity to herb injury during early dev stages & may respond differently to soil-applied herb due to their distinct root morphology & slower initial growth rate compared to beets-add'l info in IR-4 files:08/25;
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| Reasons for need: |
Pigweeds, lambsquarters, other weeds. Pigweeds in NYS and other locations have confirmed resistance to linuron, a key herbicide. Herbicides for use in carrots are limited:06/25; NJ: Limited herbicide options for effective residual weed control in carrots grown in the Northeast region, with increasing presence of challenging herbicide resistance weed species (pigweed, ragweed):09/25;
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| Requesting State(s): |
NJ:Besancon, T ; NY:Sosnoskie, L* ; WI:Heider, D ;
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| PCR Use Pattern: |
Make 3 broadcast applications of metamitron at 1.03 lb ai/a. The first shall be made preemergence (PRE) after seeding but prior to crop emergence, while the second and third shall be 7-10 days apart, beginning when weeds are in cotyledon stage. Alternatively, the PRE application may be 1.25 lb ai/a followed by postemergence applications of 0.94 lb ai/a. A total postemergence program is also allowed; three applications at 1.03 lb ai/a, 7-10 days apart, beginning when weeds are cotyledon stage. Registrant advice is needed on appropriate adjuvant(s) for postemergence applications.
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| EPA Default Residue Trials: |
3 5 6 10-4 11, 1 DECLINE TRIAL
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| IR-4 Residue Trial Plan: |
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| Residue Protocol Use Pattern: |
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| Efficacy/Crop Safety (E/CS) Data Required: |
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| E/CS Research Comments: |
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| Label Use Pattern Submitted To EPA: |
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| EPA PIF Status: |
YELLOW:08/25;
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| EPA Status: |
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| EPA PRIA Date: |
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| MRID: |
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| Comments: |
EPA CAUTION:08/25; during the 2025 FUW, Adama supports as Potential: E/CS Before Approval for Residue:09/25/sb;
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| International Status: |
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| Archive Location: |
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| QA Archive: |
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