The clouded drab moth, Orthosia incerta (Hfn.) (Lep., Noctuidae), a pest of orchard fruit

Abstract

In Britain adults of the clouded drab moth, Orthosia incerta (Hfn.), appear in the spring and are especially common during April and early May. The larvae feed on various trees and shrubs from May to June or early July, and in orchards may cause damge to the flowers or developing fruitlets. There are six larval instars. These are described, and illustrations are given of the immature stages and adults.