University of Minnesota Extension
www.extension.umn.edu
612-624-1222
Menu Menu

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 > Squash vine borer

Squash vine borer
Photo Credit: Jeff Hahn

Squash vine borer
Melitta curcurbitae
Size: Up to 1 inch long

Where/When: Commonly attacks summer squash, winter squash and pumpkins. Cucumbers and melons are less frequently affected. The larva is active from mid-July through August.

Significance: Serious pest of vine crops. The larva feeds through the center of the stems, blocking the flow of water to the rest of the plant. Plants become wilted, may collapse, and ultimately die.
Give us your feedback
  • © 2014 Regents of the University of Minnesota. All rights reserved.
  • The University of Minnesota is an equal opportunity educator and employer. Privacy