Cotton - Production, Insects and Diseases
Insect populations vary from year to year and field to field during the growing season. All fields should be monitored for insect pests and beneficial populations at least weekly during the season, preferably twice weekly after blooming has begun. In areas of high insect pressure or increasing populations, twice-a-week scouting is recommended. Monitoring plant growth and development is an important aspect of crop management, maximizing yield potential and managing insects.
"W128-Scouting Insects in Cotton," The University of Tennessee Agricultural Extension Service, W128 4/07 E12-4615 06-0326, http://trace.tennessee.edu/utk_agexcrop/1