Armillaria Root Rot (Oak Root Fungus)
Before chemical treatment, remove all infected trees, stumps, and as many roots greater than 1 inch in diameter as possible. Healthy-appearing trees adjacent to those showing symptoms are often infected also. Removal ... [... more]
University of California IPM |
Peachtree Borer
Look for the presence of frass and gum at the bases of trees when monitoring orchards in the spring. Also check trees in the fall for signs of peachtree borer activity. At this time, you can kill larvae by carefully ... [... more]
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Integrated Weed Management
Direct Field Seeding. In direct seeding, asparagus is seeded into raised beds that may be cultivated during stand establishment to control weeds in the furrow and bed shoulders. The seedling asparagus is slow to ... [... more]
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Verticillium Wilt
Soil Fumigation. Dry soil by withholding water during summer and using cover crops not susceptible to Verticillium wilt, such as sudangrass. The drier the soil, the better for deep penetration of methyl bromide. Deep ... [... more]
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Green Fruitworms
COMMENTS: Apply at the beginning of egg hatch or at the first sign of larval infestation. A second application may be necessary 10-14 days later. Tebufenozide is an insect growth regulator that must be consumed by ... [... more]
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Downy Mildew
Infections begin as irregular yellow patches on leaves; these chlorotic lesions later turn tan to light brown. If conditions are favorable, white fluffy growth of the fungus develops on the undersides of leaves. If ... [... more]
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Armyworms
Armyworms are attacked by a parasitic wasp, Hyposoter sp.. Parasitized worms can be identified by pulling the larvae apart and looking for the green parasite larvae that pop out. Hyposoter is usually not active in ... [... more]
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Cladosporium Fruit Rot
Cladosporium fruit rot of caneberry is primarily a postharvest storage disease. Even though these fungi cause little actual damage to fruit, the mycelial growth on the fruit is unappealing, so the fruit is ... [... more]
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Broad Mite
Broad mites feed on fruit and leaves, preferring young fruit up to about 1 inch (2.5 cm) in diameter that are located on the inside of the canopy. Feeding results in scarred tissue that cracks as fruit grows, leaving ... [... more]
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Southern Blight
Initial symptoms of southern blight include a yellowing of the foliage with slight darkening of the stem just above the soil line. Lesions on the stem at or near the soil line develop rapidly, girdling the stem and ... [... more]
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Begonia
(Erysiphe cichoracearum, Odium begoniae) White, powdery spots develop on upper and lower leaf surfaces and small, greasy spots occur on undersides of leaves. Also may appear on flowers of some fibrous begonias. On ... [... more]
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Fig Beetle
The adult fig beetle (family Scarabaeidae) is 0.75 to 1.25 inches long, velvet green on top with a brownish yellow band around the edge of the wings and a bright metallic green color on its ventral side. The head has ... [... more]
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