How to Manage Pests
UC Pest Management Guidelines
Monitoring Spider Mites, Aphids, and Whitefly (Early Squaring to Boll Development)
(Reviewed 5/13, updated 5/13)
In this Guideline:
HOW TO SAMPLE
Take a combined sample for spider mites, aphids, and whitefly at least once a week from early squaring through boll development. 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 and mites 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 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, mites, and whiteflies including western flower thrips, western predatory mites, bigeyed bugs, minute pirate bugs, lacewing larvae, syrphid fly larvae, lady beetles, as well as parasitized aphids and whiteflies.
(See specific pest sections for more details on thresholds and treatment options.)
UC IPM Pest Management Guidelines:
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