Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 1/1/2010
Publication Date: 2/15/2010
Citation: Steckel, L., Culpepper, S., Smith, K., Bond, J., Marshal, M., York, A., Stephenson, D., Mueller, T., Patterson, M., Price, A.J. 2010. Situation in Southern US Row Crops [abstract]. Bayer CropScience Pan American Weed Conference. CDROM. Interpretive Summary:
Technical Abstract: In research from southern University weed scientists pre applied herbicides appear to provide the best chance for successful Palmer amaranth control without relying on glyphosate. Fomesafen applied 14 days before cotton planting (DBP) or flumioxazin applied 21 DBP has provided good control if activated by rainfall or irrigation. In soybeans those same herbicides or premixes with those herbicides have also provided good weed control if activated by rainfall or irrigation. In dryland situations in both cotton and soybeans where the success of a pre applied herbicide is dictated by rainfall a combination of an early pre plant, pre plant and/or early post applications would provide the best chance to catch an activating rainfall. Post emergence Palmer amaranth control in soybean and cotton can be successful with PPO herbicides in soybean or glufosinate in cotton. However, timing is critical as good control can only be obtained if those herbicides are applied on Palmer amaranth less than 6” tall.