​Insecticide Termination in Cotton: Plant Monitoring to Know When to Quit

March 2022 | 14 min., 09 sec.
by Tina Gray Teague
Arkansas State University


​​Identifying the last effective (i.e., profitable) bolls is often challenging for crop managers, particularly in the humid midsouthern and southeastern U.S. cotton production regions. Public researchers from land-grant universities, in cooperation with Cotton Incorporated, performed long-term studies and developed insect control termination guides based on plant monitoring to identify the last effective bolls. Cotton producers and crop advisors from across the U.S. Cotton Belt, from Texas to Virginia, collaborated with researchers and Extension scientists to validate those monitoring methods and recommendations. This presentation describes the plant monitoring methods used to identify the date of cutout, which is defined as the flowering date of the last economically significant boll population. Crop managers will learn how to track DD60s to gauge boll maturity and know with confidence when to quit insect control for particular insect pest species, as well as field methods to take node above white flower counts, identify cutout, and calculate heat units—all to determine timing for terminating late-season crop protection in cotton.​

About the Presenter

Tina Gray Teague ​​Tina Gray Teague is a professor of entomology and plant science at Arkansas State University in Jonesboro. She holds a joint appointment with the University of Arkansas System Division of Agriculture. Teague received her BS in zoology and MS in entomology at the University of Arkansas and her PhD in entomology from Texas A&M University. Her research in cotton systems has spanned over 30 years, extending from early work in the Texas Lower Rio Grande River to her current location in northeastern Arkansas. Teague’s major research goal has been directed at making U.S. cotton production more economically and environmentally sustainable. She has built collaborations for a successful project that used long term on-farm records to perform a cotton carbon life cycle assessment. Her commitment to agricultural sustainability is further demonstrated by her founding of the Arkansas Soil and Water Education Conference. Held annually for the past 23 years, the conference attracts more than 500 producers, consultants, students, and other ag stakeholders interested in soil and water conservation.

Contact Information:
Email: tteague@astate.edu


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