幼螨
- 网络larva;chigger
![幼螨](../cache/1421161.jpg)
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幼螨期仅3对足。
Barely three pairs of leg in larva .
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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 % .
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由幼螨传播并且在亚洲广泛传播。
Transmitted by larval mites and widespread in Asia .
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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 .
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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 .
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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 .
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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 .
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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 % .
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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 .
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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 .