Effects of cold storage on the quality of Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) reared on artificial medium.

In vitro reared T. dendrolimi can be reared following cold storage. The quality of the parasitoid was strongly affected by cold storage, likely due to the negative effects of storage on the artificial medium. Storage of the prepupal stage at 13 °C for 4 weeks is optimum for in vitro reared T. dendrolimi. Trichogramma reared in vitro were able to parasitize natural eggs after storage and, thus, have potential for use as biological control agents in the field. © 2018 Society of Chemical Industry.