Cotton Pest Management Guidelines
UC agricultural management guidelines for control of cotton pests. Monitoring Spider Mites, Aphids, and Thrips (Seedling Cotton) (2/05) Monitoring Spider Mites, Aphids, and Whitefly (Early Squaring to Boll Development)(1/08) Monitoring Aphids and ... [... more]
University of California IPM |
Damping-off: Pythium spp.
Pythium causes water-soaked lesions on the roots or hypocotyl of infected seedlings. Lesions may collapse and turn light brown. Girdled plants often die. Pythium may rot seeds and seedlings before germination or emergence through the soil. The ... [... more]
University of California IPM |
Cotton Aphid
Cotton aphid is the most common aphid on cotton in California and it can be present at any time during the growing season. Cotton aphid is highly variable in body size and color, and adults may be winged or wingless. Nymphs and adults of wingless ... [... more]
University of California IPM |
Scientific Name: Blapstinus spp.
Darkling beetle adults range from 0.12 to 0.25 inch (3-6 mm) long and are about half as wide. They are dirty black to rusty brown in color, but this may be obscured by dust or a thin layer of soil. Larvae are very similar to wireworms in ... [... more]
University of California IPM |
Pathogen: Fusarium oxysporum f.sp. vasinfectum
Symptoms of Fusarium wilt include a general wilt, which is especially evident on warm days, and yellowing and necrosis of lower leaf margins. The vascular system of infected plants is brown. This is most apparent in the lower stem and upper ... [... more]
University of California IPM |
Alfalfa and Cabbage Loopers
UC Management Guidelines for Alfalfa and Cabbage Loopers on Cotton. Alfalfa and cabbage loopers are quite similar in appearance. The greenish larvae crawl by arching their bodies and are 1 to 1.5 inches long when mature. Looper eggs are similar ... [... more]
University of California IPM |
Transgenic herbicide-tolerant cotton
Effective, economical weed control in cotton requires an integrated approach that includes cultural, mechanical, biological, and chemical methods. Controlling undesirable vegetation around field roadsides, fencerows, and ditch banks is also an ... [... more]
University of California IPM |
UC Management Guidelines for Root Knot Nematode on Cotton
Root knot nematodes are microscopic roundworms that are widely distributed throughout California on many crops, and cause varying degrees of damage to cotton. Root knot nematodes are damaging to cotton as a single pest problem and as part of the ... [... more]
University of California IPM |
Scientific Name: Delia platura
The adult is a light gray fly about 0.2 inch (5 mm) long. Larvae are white, cylindrical, tapered anteriorly, and are also about 0.2 inch (5 mm) long. Larvae can be found inside damaged seeds or in the soil nearby. Damage generally occurs in ... [... more]
University of California IPM |
Cotton Leaf Perforator
UC Management Guidelines for Cotton Leaf Perforator on Cotton. Cotton leaf perforator is a pest only in the southern desert areas of California. Early larval instars of the cotton leaf perforator are flattened, yellow to orange caterpillars that ... [... more]
University of California IPM |
EARLY TO MID-SEASON (Light population mid-season)
Several species of whiteflies may infest cotton. Proper identification of silverleaf whitefly is important because other whitefly species do not usually cause economic damage in cotton. Use a hand lens to examine both immatures and adults. ... [... more]
University of California IPM |
Field Crickets
Field crickets are about 1 inch (25 mm) long and dark brown to black with stiff forewings, large, folded fan-shaped hind wings, and enlarged legs for jumping. Field crickets are usually hidden, although males may be detected by their loud ... [... more]
University of California IPM |
