| Trichogramma ostriniae Pang et Chen is an important egg parasitoid for controlling corn borer Mass production of T.ostriniae needs suitable temperature in rearing rooms. In this study, using eggs of Sitotroga cerealellaas host, the longevity, fecundity, emergence rate and developmental duration ofT.ostriniaewere investigated at different temperatures of 18, 20, 23, 25, 28, 30, 33 and 36℃. Results showed that females lived the longest at the temperature from 20℃-25℃ with the longevity of 7.9-9.0 d. The fecundity and emergence rate were 40.9-61.7,74.3%-84.2%respectively, at 20℃-28℃, and there was no significant difference. Developmental duration of the immature stages decreased with an increase of temperature.It was 22.6 d at 18℃ and 7.0 d at 33℃.The adult female only can live 0.56 d at 36℃, and reproductive activity was also greatly affected by high temperatures. When mass producing of T.Ostriniae on Sitotroga cerealellaeggs, the suitable temperature was 28℃-30℃.If just for stock rearing of T.Ostriniae, the suitable temperature was 18℃-20℃. |
About Journal