| Reduced Risk Status: |
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| IPM Compatibility: |
Per Requester: Very Good Fit; This use would be a good fit in asparagus IPM because it would be applied post-harvest, immediately after the last harvest of spears, when emerged weeds can be targeted before fern development. Glufosinate-P has little soil residual activity and would be useful for managing resistant weed populations, especially glyphosate- and ALS-resistant pigweed species. It could be integrated with residual herbicides and other cultural practices to improve weed control and resistance management:06/26;
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| Reasons for need: |
Broadleaf weeds and grasses, especially glyphosate- and ALS-resistant pigweed species. Primary: Pigweed species, including redroot pigweed and Powell amaranth. This use is needed to provide asparagus growers with an effective post-harvest option for emerged broadleaf and grass weeds, particularly glyphosate- and ALS-resistant pigweed species. Redroot pigweed and Powell amaranth are major weeds in asparagus and can be very difficult to control when resistant biotypes are present. Glufosinate-P would provide improved postemergence weed control compared with currently available contact herbicides and would help diversify weed management programs. Current technologies used: Glyphosate, 2,4-D, Dicamba:06/26; MD:Effective postemergence options are limited. This addition would provide an additional moa to help mitigate herbicide resistance:08/26;
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| Requesting State(s): |
IN:Meyers, S ; MD:Vollmer, K ; MI:Miranda, J* ;
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| PCR Use Pattern: |
Use Liberty Ultra as a foliar postemergence application once at 0.53 lb ai/A. BASF supports the proposed use pattern post-harvest (after spear harvest is complete but before fern emergence targeting emerged weeds as a postemergence spray) with one application of 0.47 lb ai/A of Glufosinate-P (use rate of LIBERTY ULTRA at 34 fl ozs/A):08/26;
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| EPA Default Residue Trials: |
2 5-2 10-3 11-2
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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: |
BASF needs cs only, at least 3 crop safety trials in prominent asparagus growing areas when glufosinate-P is applied post-harvest at exaggerated rates and indicated: of particular interest is the impact on the spear re-emergence for fern formation during the reminder of the current year and also the impact on health and vigor of the asparagus crown into the next year from the post-harvest applications when the non-selective herbicide (glufosinate-P) contacts the emerged but non-harvestable spears. Crop response the following year is important for a perennial crop:08/26;
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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: |
Green:08/26;
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| EPA Status: |
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| EPA PRIA Date: |
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| MRID: |
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| Comments: |
BASF supports as Researchable, Res & E/CS:08/26/sb;
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| International Status: |
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| Archive Location: |
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| QA Archive: |
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