UC Cooperative Extension | Agricultural Experiment Station

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California red scale is one of the key pests of citrus in California. This pest can damage and kill citrus trees when it attains very large populations, which is a rare occurrence. The more common economic damage results from these scale insects settling on the fruit, causing cosmetic flaws and a downgrading of the fruit. Significant economic losses from this cosmetic damage occur at much lower population densities than the high densities required to damage the trees. Consequently, there is a very low threshold for California red scale in citrus orchards. To keep populations below the threshold, growers have traditionally relied on high-volume sprays (up to 1,000 gallons per acre) of insecticides.

Read about: High-Pressure Washer Removes Red Scale for Citrus Fruits | View Other Stories

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UCANR

Event Name	Date
Maintaining Your Edible Landscaping - Marin Master Gardeners	5/22/2013
Introduction to Grasses - California Naturalist	5/24/2013
State 4-H Field Day - State 4-H Office	5/25/2013
Calaveras MG Open Garden Day - Planting a Veggie Garden - Calaveras County Master Gardeners	5/25/2013
Composting with Chicken Manure at Central Park Garden - Yolo County	5/25/2013

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