Spider Mites, Aphids, and Thrips on Seedling Cotton
Each name links to more information on identification and management.
Click on photos to enlarge
Spider mites Identification tip: To the naked eye, spider mites appear as tiny moving dots. Adult females
are about 0.01 inch (0.3 mm) long. Spider mites live in colonies, mostly on the lower surfaces of leaves,
and produce a webbing that can cover much of the undersurface of the leaf. Adults have 8 legs and an
oval body, usually with 2 red eyespots near the head. Eggs are spherical and translucent. Immatures resemble
adults and feed on leaves in the same way.
Cotton Aphid Identification tip: Cotton aphid is highly variable in body size and color, and adults may be winged
or wingless. Nymphs and adults of wingless cotton aphids vary in color from yellow to green to nearly black.
Thrips Identification tip: Thrips are tiny, slender insects less than 0.06 inch (1.55 mm) long.
They are light colored; adults have clear, slender wings. Damaged leaves are distorted.
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specific pest problems. See our Home page,
or in the U.S., contact your local Cooperative Extension office
May 17, 2013.