Weed Photo Gallery
The UC IPM Weed Photo Gallery includes many, but not all, weed species commonly found in California farms and landscapes. Additional species will be added over time. Acknowledgments ... [... more]
University of California IPM |
Cherry
Relative Toxicities of Insecticides and Miticides Used in Cherries to Natural Enemies and Honey Bees (1/02) ... [... more]
University of California IPM |
Cribrate Weevil
Adults feed on foliage, giving it a ragged appearance. Under high population pressure, only the mid-vein of the leaf will remain. Adult feeding on the bark of young twigs may cause dieback. Mature trees can withstand ... [... more]
University of California IPM |
Nematodes
Symptoms described below are indicative of a nematode problem, but are not diagnostic as they could result from other causes as well. Symptoms of a nematode infestation are reduced vegetative vigor and fruit yield, ... [... more]
University of California IPM |
Branch And Twig Borer
The branch and twig borer is a slender brown beetle about 0.5 to 0.66 inch long. The body is cylindrical and the head and prothorax are narrower than the body proper. The beetle lays its eggs in the dead wood of a ... [... more]
University of California IPM |
European Earwig
COMMENTS: Sprays most commonly used in very large, older blocks where baiting is difficult. Spray on trunks and crotches of trees at the beginning of spring activity. Once high populations are found in trees such an ... [... more]
University of California IPM |
Fruittree Leafroller
The fruittree leafroller overwinters in the egg stage on twigs. Eggs hatch in early spring; larvae are dark green caterpillars with black heads and are about an inch long when fully grown. They pupate inside a webbed ... [... more]
University of California IPM |
Redhumped Caterpillar
The redhumped caterpillar is easily recognized because of its striking appearance: the main body color is yellow and is marked by longitudinal reddish and white stripes; the head is bright red, and the fourth ... [... more]
University of California IPM |
Powdery Mildew
The fungus overwinters in buds on twigs and as cleistothecia, which are spore-containing structures, on the bark of twigs and branches. Secondary spores produced in spring spread the fungus to new growth. Infections ... [... more]
University of California IPM |
European Fruit Lecanium
COMMENTS: Organophosphate insecticides used during delayed dormancy are very toxic to honey bees. Remove bees from orchard if cover crops or weeds are in bloom. Oil sprays may injure trees that are water stressed. It ... [... more]
University of California IPM |
Crown Gall
Crown gall is best prevented by purchase of trees from a reputable nursery accompanied by careful handling to avoid injury as much as possible, both during planting and during the life of the tree in the orchard. ... [... more]
University of California IPM |
Mountain Leafhopper
The mountain leafhopper is a slender, dark brown leafhopper with red eyes and a yellow band behind the head and a yellow spot in the center of each wing. The leafhopper overwinters in weedy sugarbeet fields. If the ... [... more]
University of California IPM |
