An Oak Leaf Tier, Croesia semipurpurana (Lepidoptera: Tortricidae) in Connecticut1

A detailed study of an oak leaf tier, Croesia semipurpurana (Kearfott), was conducted at Stamford, Connecticut during 1961 and 1962. The various stages of the insect are described briefly. The seasonal development is presented for the Connecticut area. Eggs are laid in kite June and early July and hatch the following April. The immature larvae enter the expanding buds and feed upon the young leaves. Major defoliation occurs when the larvae feed more openly in the later instars, usually from within protective webbing. The larvae spin down on threads during late May; pupation occurs primarily in the litter on the ground. Adults emerge 1 to 2 weeks later.