squash vine borer

The squash vine borer is a type of clearwing moth, scientifically known as Melittia satyriniformis. These moths are characterized by their slender bodies, often with bright red or yellow markings, and transparent wings that lack scales. They are notable for mimicking wasps, a form of protective coloration.12

The larvae of the squash vine borer are pale, wormlike borers that can be injurious to cultivated plants. They bore into the stems of squash and related plants, such as gourds, pumpkins, and cucumbers. Infested vines may wilt, and yellowish-green material may protrude from holes in the stem. The larvae typically spend about a year boring into the plant before pupating in the soil. The squash vine borer is found east of the Rocky Mountains, ranging from Canada to South America.2