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Asian Citrus Psyllid

ACP Information

Asian Citrus Psyllid Picture
Asian citrus psyllid (Diaphorina citri Kuwayama) The Asian citrus psyllid, Diaphorina citri, is a tiny, mottled brown insect about the size of an aphid. This insect poses a serious threat to California's citrus trees because it vectors the pathogen that causes huanglongbing disease (HLB). This disease is the most serious threat to citrus trees worldwide—including those grown in home gardens and on farms. The psyllid feeds on all varieties of citrus (e.g., oranges, grapefruit, lemons, and mandarins) and several closely related ornamental plants in the family Rutaceae (e.g., calamondin, box orange, Indian curry leaf, and orange jessamine/orange jasmine). Click here to learn more about this psyllid and disease control from Citrus Insider.

Distribution of ACP, HLB and parasites in California

Here you'll find a zoomable map to see how many trap cards have had Asian Citrus Psyllids (ACP) since 2008 at the section level (one mile square area).

The Asian Citrus Psyllid and Citrus Disease Huanglongbing

Report A Psyllid

If you think you've spotted Asian Citrus Psyllids on your tree or your tree is infected with Huanglongbing act fast. Call the free statewide pest hotline at 800-491-1899 to speak to an expert. For other inquiries, complete the form below.