2005 Annual Report 4d.Progress report. This report serves to document research conducted under a cooperative agreement with the Institute for Environmental Studies, Shepherd University. Additional details of this research can be found in the report for the parent CRIS 1931-21000-015-00D, Integrated Orchard Management for Deciduous Tree Fruit Crops. Nectar production from peach extrafloral nectar was found to be greatest in the early morning and also greater June than in July and August. Nectar production also varied among cultivars. Electroantennograms, conducted in collaboration with the Chemicals Affecting Insect Behavior Laboratory in Beltsville, showed that the ladybeetle Harmonia axyridis cannot detect volatiles emitted by peach extrafloral nectar. Feeding on nectar by this ladybeetle is therefore a result of foraging along the stem rather than a directed search specifically for the nectar. This project supplements the parent CRIS by providing detailed information on the interaction between biological control and extrafloral nectar, contributing to objective 2a, enhancing natural biological control of insect pests of apple.