Recovery effects on constant temperature cost of 1st-4th stage pupae of Bactrocera minax briefly exposed to lower temperature
Bactrocera minax (Enderlein) is an important citrus pest in southern China.To demonstrate the recovery effects on constant temperature cost of the 1st-4th stage pupae of B.minax,the pupae were exposed to a series of lower temperatures (10℃,15℃,20℃,based on constant temperature of 25℃) for 2 h,4 h and 8 h and the adult eclosion was observed.The results showed that the eclosion growth rate was 14％-47％ when the 1st stage pupae were exposed to 15℃or 20℃ for 2 h,4 h and 8 h,while it was 2％-45％ when the 2nd-3rd stage pupae were exposed to 10℃ or 15℃ for 2 h,4 h and 8 h and 20℃ for 4 h;it was 28％-46％ when the 4th-stage pupae were exposed to 10℃,15℃ or 20℃ for 2 h,4 h,8 h,with a positive growth.It indicated that there were recovery effects on the constant temperature cost.The recovery effect of the 4th-stage pupae exposed to 10℃,15℃ and 20℃ for 2 h and 8 h was significantly higher than those of the 2nd-3rd stage pupae.It was concluded that the pupae at certain stages exposed to exact lower temperatures with particular exposure time could produce recovery effects on constant temperature cost and there was significant recovery difference between pupae of different stages.The results could provide reference for the preservation of B.minax pupae in the laboratory and adult population forecasting in the field with rapid warm-up in early spring or cold spell in later spring.
Bactrocera minaxshort-term lower temperaturelst-4th stage pupaeconstant temperature costrecovery effect
NETL
NSTL
万方数据
维普
