Omnivorous Leaf Tier, Cnephasia Longana Haw.: A Relatively New Pest of Strawberries, Iris and Other Crops in Oregon

Abstract

The first knowledge of this insect in N. America was recorded in 1929. Larvae appear when early strawberries are blooming and upon bulbous iris later. Damage by the larvae continues for about 6 weeks followed by pupation, generally upon the hosts. Adults are present throughout June and into July. Mating and oviposi-tion take place in 2-7 days. Newly-hatched larvae spin silken hibernacula in July and overwinter without feeding, resuming activity in spring. 29 hosts, in 12 plant families, have been found to date. Most serious injury noted is to strawberry, iris and flax though peas, wheat, hops, filbert and leguminous hay crops are attacked.