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Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Caterpillars, maggots, grubs, and similar immature insects - 1/4 inch - 1/2 inch long > Imported currantworm

Imported currantworm
Photo Credit: Jeff Hahn

Imported currantworm
Nematus ribesii
Size: Up to ¾ inch long

Where/When: Feeds on currants and gooseberry. The larvae are active in May and June.

Significance: They feed on the leaves, sometimes severely defoliating plants.  They are generally not a common problem in Minnesota gardens, although they can become abundant in localized sites.
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