| 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. This would provide improved postemergence weed control compared with currently available contact herbicides and would help diversify weed mgmt programs. Current technologies used:Glyphosate, 2,4-D, Dicamba:06/26; MD:Effective postemergence options are limited. This addition would provide an addl moa to help mitigate herbicide resistance:08/26; DE:useful alternative to Group 4 herbicides, which are limited in use due to drift and volatility issues:09/26; NY:particularly to help mitigate glyphosate resistance development & spread:09/26; NJ:limited postharvest options for pigweeds and other emerged weeds. This would provide an adddl moa, particularly where glyphosate- or ALS-resistant pigweed & horseweed populations occur:09/26;
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| Requesting State(s): |
DE:VanGessel, M ; IN:Meyers, S ; MA:Gannett, M ; MD:Vollmer, K ; MI:Miranda, J* ; NJ:Besancon, T ; NY:Sosnoskie, L ;
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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: |
2 5-2 10-2 11
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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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