Codling moth (Laspeyresia pomonella) egg and 1st instar larval mortality was evaluated during 1970–1971 on ‘Bartlett’ pear in southern Oregon. Average egg mortality was 20 and 33% in 1970 and 1971 respectively. Parasitism byTrichogramma minutumRiley accounted for 10% of the total. Mortality to 1st instar larvae averaged 55% and total egg-1st instar mortality 69% for the 2-yr period. Favored sites for oviposition on pear were the lower surface of fruit cluster leaves; 80–90% of the fruit entries were through the calyx or beneath the calyx lobes. Susceptibility of various pear cultivars to entry by the first instar larvae was compared to the Golden Delicious apple variety. A moderate to high degree of antibiosis was detected in the D'Anjou, Bosc and Comice cultivars. This resistance is believed related to lignification and formation of stone cells which prevent or hamper larval entrance into the fruit.