Asian Citrus Psyllid

What is it The Citrus Psyllid is an insect that feeds on the leaves and stems of citrus trees, and the Asian variety (Diaphorina citri, ACP) is a threat to citrus crops in the U.S. The adult ACP is very small (usually 2-4 millimeters) and is typically mottled brown in color. Pregnant females and nymphs (juveniles) are yellowish orange, and nymphs have bright red eyes. Adults are often found feeding on the underside of leaves, but the nymphs feed only on new growth. The ACP eggs are yellow in color and are usually found on the newest growth, tucked in the folds of new leaves. How does it cause harm? The adult ACP feeds on the sap of leaves and twigs of citrus trees (including orange, lemon, lime, mandarin, pomello, kumquat, grapefruit and tangerine) producing sticky honeydew, which can cause the leaves to mold. Nymphs are equally dangerous to young plants as they feed only on new growth and can cause leaves to grow misshapen and deformed. Excessive feeding can cause leaf buds to die preventing leaves from forming. Established plants can survive the nymphs feeding, but young plants often die before they can establish healthy leaf growth. Though excessive […]
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