幼螨

幼螨期仅3对足。

Barely three pairs of leg in larva .

结果表明，该螨完成一个世代需（613±129）d；存活率高，卵孵化率为100%，幼螨存活率为975%，若螨存活率为974%；

The result showed that the mite had a short generation ( 6 13 ± 1 29 ) days , the survival rate was high , hatch rate of egg was 100 % , larva was 97 5 % , nymph 97 4 % .

由幼螨传播并且在亚洲广泛传播。

Transmitted by larval mites and widespread in Asia .

致死低温对卵的临界作用期位于幼螨即将破壳而出的发育阶段。

The crucial developmental period of the eggs to low relative humidity was on the verge of shell-breaking stage .

对幼螨、若螨、成螨和卵等螨的各发育阶段均有效。

David mite right , the nymph and the adult mites and mite eggs , etc. in the development stage effective .

在低剂量下，杀卵活性低，但是通过残留接触可有效地杀死新孵化的幼螨。

The ovicidal activity is very low at low dosage . However , it is very effective in killing the newly hatched larvae by residual contact action .

浏阳霉素对3种叶螨均无杀卵作用，但施药5～6天后，对初孵幼螨仍能杀死90%以上。

The antibiotic showed no effect on the eggs of the leaf mites . But the mortality of newly hatched mites was above 90 % 5-6 days after the-application .

用马铃薯薄片法在室内已连续饲养3代，卵孵化率、幼螨、若螨存活率均超过90%，该方法可用于室内大量饲养刺足根螨。

We have successively reared the mite for 3 generations using this method . The egg hatching rate and survival of larvae and nympha were all above 90 % .

幼螨、若螨的存活率以27℃最高，高温不利于幼螨、若螨的存活，33℃下仅为55.72%发育为成螨。

The survival of the larvae and nymphs was highest at 27 ℃ . Higher temperatures were unfavorable for their survival : at 33 ℃, only 55.72 % developed into the adult stage .

在26℃恒温中，每天12小时以下经低湿（30%RH）处理，对卵和幼螨的存活无明显影响；

Under a fixed temperature of 26 ℃ in the laboratory , a 12 br . treatment , with 30 % RH showed no significant effect on the survival rate of eggs and early instar nymphs of the predator .