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Cotton Stalk Destruction with 2,4-D Herbicide

Robert Lemon, Danny Fromme, Rick Jahn, and D. Joel Pigg

ABSTRACT

Early harvest and stalk destruction when performed on an area-wide basis are among the most effective practices for managing overwintering boll weevils. The objective of this field study was to assess the effectiveness of 2,4-D amine for post-harvest cotton stalk destruction on both shredded and standing stalks. Six treatments were evaluated in the study: untreated shredded and standing stalks, shredded stalks sprayed one hour after shredding, shredded stalks sprayed seven days after shredding, standing stalks sprayed one day after picker-harvest, and standing stalks sprayed seven days after picker-harvest. Treatments sprayed immediately showed significantly greater control over treatments sprayed seven days later. However, both application timing treatments were acceptable, exhibiting over 95% control of cotton stalk regrowth 38 days after initial applications. At all observation periods, there were no differences in herbicide effectiveness between shredded or standing stalk treatments. Results from this study and monitoring of grower fields treated similarly in 2003 provide evidence that picker-harvested standing stalks can be effectively destroyed with 2,4-D amine.





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Document last modified 04/27/04