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Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Caterpillars, maggots, grubs, and similar immature insects - Under than 1/4 inch long > Plum curculio larva

Plum curculio larva
Photo Credit: Michigan State Univ

Plum curculio larva
Conotrachelus nenuphar
Size: Up to ¼ inch long

Where/When: Apple and plum; also apricot, pears, peach, cherry, and crabapple are hosts.  The larva appears in June and is active for a period of about 2 weeks.

Significance: Feeding causes scarring or lumpiness on fruits.  The fruit is damaged internally by the burrowing larva causing premature fruit drop.
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