Abstract
Mature larvae of the codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae), a key pest of apples and pears, leave infested fruit and spin cocoons in which they transform to pupae. These larvae may either immediately transform to pupae from which moths emerge two to three weeks later, or they overwinter in a state of diapause (Headlee 1929; Steiner 1929; Cutright 1937; Gould & Geissler 1941; Yothers & Carlson 1941; MacLellan 1960; Geier 1963; Wearing & Skilling 1975a,b; Howell 1994; Lacey et al. 2006).
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