Yellow Sticky Cards Reduce the Numbers of (Hymenoptera: Trichogrammatidae) Following Augmentative Releases against the Fruit Borers (Lepidoptera: Carposinidae) and (Lepidoptera: Tortricidae) in a Pear Orchard.

Integrated pest management relies upon mutual compatibility among pest control tactics. The fruit-boring moths and can be devastating pests of pome and stone fruit production. parasitizes the eggs of these pests, preventing their eclosion, but its efficacy can be reduced by other pest control tactics. We tested attraction to five colors, and moth attraction to six colors, in laboratory choice tests, and thereafter deployed yellow sticky cards in tandem with releases of in field trials in a pear orchard. Yellow sticky cards deployed at high density trapped and reduced their numbers post-release. They also trapped adult , which appeared to compensate for reduced egg parasitism on this species, but not on , which had higher abundance in plots with yellow sticky cards. The cards also captured adult lacewings, likely reducing their numbers in the field, but did not capture large numbers of lady beetles. The results suggest that yellow sticky cards can be used at high density to control aphids, psyllids and leafhoppers in early spring (March and April) when natural enemies are in low numbers, then removed in May so as not to interfere with augmentative releases of that must be timed to coincide with peak flights of fruit-boring moths. This strategy should enhance the compatibility of yellow sticky cards with egg parasitoid releases.