developmental threshold
1.Developmental threshold temperature and effective thermal summation of Phthanandria atrilineata Butler.
2.The threshold temperatures and effective accumulated temperatures of development of Hemiberlesia potysiphila have been determined. The developmental threshold temperature of the Ⅰ instar nymph is 6.7±0.6℃, the Ⅱ instar nymph 10.4+2.6℃, the pupal stage 13.8±3.3℃, the female adult stage 11.5±2.0℃, the whole life history 13±2.8℃.
3.The threshold temperatures and effective accumulate temperature of development of Hemiberlesia potysiphila have been determined. The developmental threshold temperature of the I instar nymph is 6.6℃ ±0.8℃ ,the II instar nymph9.0℃±1.0 ℃ , the pupal stage 12.0℃ ±1.6℃ , the female adult stage 9.7℃±1.4℃, the whole life history10.1℃±0.7℃ .
4.The developmental threshold temperature(DTT) and effective accumulated temperature(EAT) of the larvae and whole larval stage and whole generation of Acyrthosiphon pisum were determined under 80% relative humidity and 6 temperature treatments(12 ℃,15 ℃,18 ℃,21 ℃,24 ℃ and 27 ℃).
