Defoliation Research on Pima and Upland Cotton at the Maricopa Agricultural Center in 1992
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AbstractField studies were conducted at the Maricopa Agricultural Center to evaluate the effectiveness of selected defoliation treatments on Pima and Upland cotton under warm and cool weather conditions. Weather conditions during September and October defoliation tests were warm and dry. Several cool weather tests in November were terminated by an early frost. Dropp used alone was effective as a single application in September tests, but not in October. In October, Dropp used with the adjuvant Sylgard was superior to Dropp with Agridex and resulted in defoliation similar to Dropp combination treatments. An experimental defoliant, SN597 NA300, was as effective as the Dropp+ Def +Accelerate treatment in October tests with botlu Pima and DPL 90 cotton.