How to Manage Pests
UC Pest Management Guidelines
Monitoring Aphids and Whitefly (1st Open Boll to Preharvest)
(Reviewed 5/13, updated 5/13)
In this Guideline:
HOW TO SAMPLE
After the first open boll, you can stop sampling for spider mites but continue to take a combined sample for aphids and whitefly at least once a week.
Beginning at least 50 paces into the field, choose a sample plant at random and select the 5th mainstem node leaf from the terminal. Using a hand lens, turn the leaf over and check for insects on the underside (these are called leaf-turns). Record monitoring results.
Repeat these leaf-turn samples on 10 plants in this area of the field, walking at least 20 paces between sample plants. Then move on to another area, repeating the procedure in a total of 4 areas of the field. Be sure to check the edges of the field for whiteflies migrating in. Also check for natural enemies of aphids and whiteflies including bigeyed bugs, minute pirate bugs, lacewing larvae, syrphid fly larvae, lady beetles as well as parasitized aphids and whiteflies.
UC IPM Pest Management Guidelines:
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