Tomato Psyllid
The adult psyllid is a small insect (about 0.12 inches) that resembles a cicada. The adults have white or yellowish markings on the thorax, clear wings, and lines on the abdomen between segments. The tiny eggs are ... [... more]
University of California IPM |
Cyclamen
(Fusarium oxysporum f. sp. cyclaminis) A progressive yellowing and wilting of leaves starts with oldest. Brown discoloration of the vascular tissues in tubers. Tuber remains firm unless secondary bacteria are ... [... more]
University of California IPM |
Peach Leaf Curl
Leaves produced in spring are thickened, curled, and colored red or yellow instead of normal green. Severely affected shoots die. Irregular, reddish lesions are sometimes seen on fruit. Badly diseased leaves fall by ... [... more]
University of California IPM |
Lygus Bugs
After fruit has formed, sample the cover crop with a sweep net to determine if lygus bugs are present in the orchard. If they are, or if an orchard has had a history of lygus injury, take fruit samples at least every ... [... more]
University of California IPM |
Crabgrasses
Large crabgrass, D. sanguinalis, is a widely distributed annual that germinates throughout the summer. Seedlings sprout quickly, forming a clump with extensive roots where soil is moist. Once established, it is ... [... more]
University of California IPM |
Monitoring Aphids And Whitefly (1st Open Boll To Preharvest)
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. Also ... [... more]
University of California IPM |
Pythium Stalk Rot
Pythium stalk rot commonly becomes apparent when the plant suddenly falls over. Infection usually involves a single internode near the soil line. Diseased areas are dark brown, water-soaked, soft, and collapsed. The ... [... more]
University of California IPM |
Strawflower
(Plasmopara halstedii) Yellow foliage with downy white sporulation on the undersurface. Leaves roll downward. Tissues sometimes are killed Disease is favored by cool (59°F), wet weather. Spores (sporangia) are ... [... more]
University of California IPM |
Verticillium Wilt
Orchards can be adversely affected by the disease even when low pathogen numbers in soil (2-3 propagules per gram) are present. Avoid interplanting young orchards with susceptible crop plants, such as cotton, ... [... more]
University of California IPM |
Cucumber Mosaic
Silver reflective plastic mulches applied at planting have been shown to be effective in repelling aphids from plants, thereby reducing or delaying virus infection. Mulches help plants off to a healthy start and are ... [... more]
University of California IPM |
Ringspot
In California, this disease occurs only on Brussels sprouts. Symptoms consist of circular leafspots (0.5 inch in diameter) that range in color from light brown to black. With time these spots develop concentric rings ... [... more]
University of California IPM |
Susceptibility Of Weeds To Herbicide Control
ATR = atrazine (Drexel Atrazine) ETH = ethofumesate (Prograss) PEN = pendimethalin (Pre-M, Pendulum) ... [... more]
University of California IPM |
