How to Manage Pests
Pests in Gardens and Landscapes
Tomato pinworm—Keiferia lycopersicella
Tomato pinworm caterpillars are tiny and have a mottled pattern. The color varies from gray to yellowish
with red or purple coloring around each segment. Caterpillars may sometimes be quite dark.
Identification of species |
Pinworms cause leaf mines and folded shelters on leaves. They bore into fruit at the stem ends, creating
narrow, blackened tunnels. Damage is hard to detect at first, but after larvae have been feeding for some
time, a brown, granular frass usually appears at the edge of the calyx.
Tomato pinworms are difficult to control with insecticides, and natural enemies are not effective. Disc
all plants immediately after harvest. A host-free period of 3 months or more is essential to control pinworms.
folds in leaf