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 |
Caneberries
Relative Toxicities of Insecticides and Miticides Used in Caneberries to Natural Enemies and Honey Bees (6/03) ... [... more]
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Leafrollers
Begin examining plants in spring. Look for evidence of infestation by inspecting both leaves and fruit for larvae, pupae, pupal cases, webbing, and feeding damage. Concentrate monitoring activities in suspected or ... [... more]
University of California IPM |
Leaf Spot
Leaf spot is found on erect and trailing blackberry, dewberry, ollalieberry, and boysenberry. Conidia are disseminated by wind and water splash throughout the growing season, and infection increases with increased ... [... more]
University of California IPM |
Botrytis Fruit Rot
To promote air circulation and quicken drying of plant tissue, heavily prune the plants to open the canopy. A narrow row can be maintained by removing the first flush of primocanes (first-year canes), minimizing ... [... more]
University of California IPM |
Raspberry Horntail
Beginning in April, female horntails insert their eggs just under the epidermis of both blackberry and raspberry canes, about 2 inches (5 cm) below the tips. A few days later eggs hatch into very small larvae that ... [... more]
University of California IPM |
Phytophthora Root Rot
Phytophthora is a soilborne fungus that survives in the soil as a resting spore (oospore). When soils become saturated with water for prolonged periods, infectious motile spores (zoospores) are released into the soil ... [... more]
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Root Weevils
Adult root weevils are beetles. They feed at night and hide around the crowns of plants during the day; they cannot fly. The adults, nearly all females, emerge in late spring or early summer, feed on foliage, and lay ... [... more]
University of California IPM |
Orange Rust
Young blackberry shoots infected with orange rust are spindly, stunted, and bushy, producing a witch's broom type of growth in spring. Unfolding leaves are usually stunted, misshapen, and pale green to yellow. ... [... more]
University of California IPM |
Yellow Rust
Disease incidence and severity can vary with location, spring rainfall, and cultivar. A late fall or early spring cultivation to cover fallen leaves, old cane stubs, and refuse before budbreak can eliminate infection ... [... more]
University of California IPM |
Powdery Mildew
Raspberry leaves infected with powdery mildew develop light green (chlorotic) spots on the upper surface, often with white mycelial growth on the lower leaf surface. The spots may appear water-soaked, and leaves have ... [... more]
University of California IPM |
Downy Mildew
Downy mildew initially causes a yellow discoloration on the upper leaf surface of blackberries that progresses to red and purple. Lesions are often angular and restricted by veins. On some cultivars, leaf symptoms ... [... more]
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