| 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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| Efficacy/Crop Safety (E/CS) Data Required: |
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| E/CS Research Comments: |
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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;
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