How to Manage Pests
UC Pest Management Guidelines
Monitoring Spider Mites, Aphids, and Thrips (Seedling Cotton)
(Reviewed 5/13, updated 5/13)
In this Guideline:
Start sampling for aphids, spider mites, and thrips as soon as plants emerge. Go to the specific pest sections for more information on when to treat and treatment options.
WHEN AND HOW TO SAMPLE
- Sample once or twice a week.
- Walk down rows in four quadrants of the field.
- Use a hand lens to examine the first true leaves or cotyledons of random plants looking for damage and insects and mites.
||No treatment is generally required. Treat for thrips only if plants show poor growth, there is terminal damage, and thrips are present in significant numbers.
||Treat for mites before defoliation occurs and the mite populations are high.
||Treat for aphids if high populations persist for 7 or more days.
UC IPM Pest Management Guidelines:
UC ANR Publication
- L. D. Godfrey, Entomology, UC Davis
- P. B. Goodell, UC IPM Program and Kearney Agricultural Research and Extension Center, Parlier
- E. T. Natwick, UC Cooperative Extension - Desert Research and Extension Center, Imperial County
- D.R. Haviland, UC Cooperative Extension, Kern County and UC IPM Program
- V. M. Barlow, UC Cooperative Extension, Riverside County and UC IPM Program
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