Diaphania nitidalis, the pickleworm, is a serious agricultural pest insect in the family Crambidae. It damages squash primarily, but it is also a common pest of other cucurbits such as cucumbers and melons. It is a tropical species which can be found in the southern United States. The pickleworm adult is a flashy moth with wide triangular wings and a wingspan of about one inch. The wings are mostly iridescent brown with a central band of yellow and thin white borders. The legs are white. The