| Reduced Risk Status: |
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| IPM Compatibility: |
Per Requester: Very Good Fit: Glufosinate-ammonium use will offer a new mode of action for weed control in sugarcane and will aid in resistance management.
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| Reasons for need: |
Itchgrass [Rottboellia cochinchinensis (Lour.). Currently, the sugarcane industry is limited to paraquat for non-selective weed control utilizing post-directed/shielded/hooded applications. With concerns about the future of paraquat’s registration status, other herbicide options are needed. Glufosinate-ammonium may also provide benefits in controlling troublesome broadleaf weeds such as divine nightshade [Solanum nigrescens (Mart. & Gal.)], ragweed parthenium (Parthenium hysterophorus L.), & morningglory (Ipomoea spp.):06/24; FL-Ragweed parthenium is becoming a difficult weed to control & has been documented as having resistance or tolerance to glyphosate. Glufosinate is very effective on broadleaf weeds & would be an important tool"07/24; FL/It will meet our needs for broadleaf weed control & for guineagrass control which is difficult to manage with current sugarcane herbicides in FL. Post-directed application of glufosinate will be an important tool that we currently do not have for guineagrass mgmt:07/24; LA/Itch grass is becoming increasingly hard to manage with preemergent herbicides. A good safe post emergent herbicide is needed to successfully manage this weed. Paraquat has limitations with the biggest one being crop injury:07/24;
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| Requesting State(s): |
FL:Clark, B, Baucum, L, Odero, C, ; LA:Finger, A*, Gravois, K, Viator, R ;
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| PCR Use Pattern: |
Make one application of Liberty/Rely per year to small weeds as 1) a directed spray, at 29 fl oz/a to row middles and across the lower (12" or less) canes or 2) shielded/hodded to row middles at 29 to 48 fl oz/a. Application shall be at least 75 days before cane harvest.
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| EPA Default Residue Trials: |
3-3 4-3 6 13
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| IR-4 Residue Trial Plan: |
3-3 4-2 13; 1 PROCESSING (MOLASSES, REFINED SUGAR)
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| Residue Protocol Use Pattern: |
USE THE LIBERTY ULTRA HERBICIDE PRODUCT (1.76 LB AI/GAL OF GLUFOSINATE-P-AMMONIUM ACTIVE INGREDIENT; ALTERNATE PRODUCT NAME IS BAS 1010 05 H); MAKE 1 SOIL BROADCAST (BELOW CROP CANOPY) APPLIC OF 0.468 LB AI/A IN 30-50 GPA; APPLIC SHALL INCLUDE AMMONIUM SULFATE (AMS) AT A RATE OF 3 LB/A; MAKE APPLIC BETWEEN CANE ROWS AND ACROSS THE INTERROW AREA, BELOW THE CANOPY WITH SPRAY PATTERN OVERLAPPING ACROSS ONLY THE LOWER 12 IN OF THE PLANTS, AT 75 {±3) DAYS BEFORE HARVEST; AT APPLIC, SUGARCANE MUST BE AT LEAST 3.3 FT TALL (OVERALL HEIGHT - TOP OF PLANTS); AVOID ALL SPRAY CONTACT WITH CANE SHOOT GROWING POINTS AND MINIMIZE SPRAY CONTACT WITH GREEN CANE FOLIAGE; IN THE TRIAL FOR PROCESSING SAMPLES, INCLUDE A 2ND TREATED PLOT WITH A 3X RATE OF AI/A
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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: |
ORANGE:08/24
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| EPA Status: |
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| EPA PRIA Date: |
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| MRID: |
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| Comments: |
No key exports noted. The use pattern requested is for a directed or hooded/shielded placement and is different from PR# 09960; Glufosinate will injure foliage that is contacted. This injury to is both intentional and acceptable. Supporting data shows effectiveness against itchgrass, a weed of particular interest, according to American Sugar Cane League representatives:06/24/sb; LA-we need glufosinate post-directed applications after layby cultivations & FL-Glufosinate will allow broader diversity in chemistries used for weed management in Sugar Cane:07/24/sb; BASF supports as Reseachable, Requires Residue Data only:08/24/sb; EPA HOLD CAUTION:08/24; BASF suggested this chemical be changed from Glufosinate to Glufosinate-P and the PCR requester was in agreement, so the chemical has been updated accordingly:01/25/sb; Status updated to "Complete w ongoing trials" 05/25/ds
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| International Status: |
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| Archive Location: |
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| QA Archive: |
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