Effects of Heat Stress on Cotton Production in the Low Deserts of Arizona​

June 2021 | 26 min., 31 sec.
by Randy Norton
The University of Arizona


High-temperature trends in the low desert of Arizona can have a severe negative impact on cotton production. Heat stress indices have been developed for tracking the effects on cotton fruiting patterns and ultimately yields. The current research evaluates the effects of level two heat stress (L2: crop canopy temperature above 86 degrees Fahrenheit) on flower formation, pollen shed, fruit retention and distribution, and yield. The overall objective of the current work is to develop a set of infield measurements that can accurately describe the heat tolerance level of a given variety of cotton.​

About the Presenter

Randy Norton ​​Randy Norton is an associate regional Extension specialist with the University of Arizona and also serves as the resident director of the Safford Agricultural Center. He has a BS degree in plant sciences with an emphasis in crop science and MS and PhD degrees in soil and water science with an emphasis in soil fertility and soil chemistry. The primary focus of his work is improving the efficiency and sustainability of desert agricultural systems through a broad research and Extension program directed at solving production chal​lenges faced by growers across Arizona. Areas of research and Extension focus include soil fertility, variety evaluation, and management of certain pests and diseases in Arizona crop production systems.

Contact Information:
Email: rnorton@cals.arizona.edu


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