幼虫的

The antifeedant activity of the compoud was tested against larvae of Pieris rapae by leaf dipping method and topical application method.

本文研究了该活性成分对菜粉蝶幼虫的拒食作用和对乙酰胆碱酯酶活性的影响。

The antifeedant activity of extract from Heynea trijuga against Pieris rapae larvae,and AshE activity and proteases activity of the highest antifeedant activity of H.

测试了海木提取物对菜青虫幼虫的拒食活性，并对拒食活性高的部分进行了乙酰胆碱酯酶活性、蛋白水解酶活性等测定。

To provide data for toxicity assessment of avermectin on diamond back moth, Plutella xylostella, the leaf protection role of avermectin was studied.

尝试采用叶片保护率评价阿维菌素对小菜蛾2龄、3龄幼虫的毒力，以期为该药毒力的准确评价提供资料。

The Ikonos data and the QuickBird data identified every rice land aquatic habitat by village and strata. Ikonos and QuickBird visible and NIR data of geo-referenced riceland An. arabiensis aquatic habitats can develop and implement an Integrated Vector Management program based on larval productivity.

因此，可根据QuickBird 0.6 m卫星数据的土地利用和覆盖指数和阿拉伯按蚊滋生点幼虫的增殖特性，在当地建立和应用媒介综合防治系统(IVM-Integrated Vector Management)。

A certain degree of stem solidness results in damaged and desiccated eggs and impaired larval movements.

一定的茎秆硬度会致使虫卵损伤和脱水，削移幼虫的移动。

Five species of solvents, namely, acetone, ethyl acetate, ether, trichloromethane and petroleum ether were selected to obtain extracts from Portulaca oleracea L. with microwave assistance and the biological activities of each extract was tested against Plutella xylostella L.

在微波加热条件下，以丙酮、乙酸乙酯、乙醚、三氯甲烷和石油醚为溶剂对马齿苋干粉进行提取，试验了各溶剂提取物对小菜蛾幼虫的触杀、胃毒及拒食活性，确定了石油醚提取物触杀作用的LD50。

The survival and pupation rates of over-wintered SSB collected from rice field were 67.30%and 70.06%,much higher than SSB collected from Zizania fields.The emerging rates were similar between SSB collected from both habitats.

水稻田二化螟越冬幼虫的存活率和化蛹率分别为67.30%和70.06%，茭白田二化螟则分别比其低20.90%和21.69%；二者的羽化率差不多，分别为90.28%和89.19%。

The results indicate that the two kinds of oil dispersions have high toxicities on two and four arm larvae.

随着受试液质量浓度的增加，幼虫的体长变短，畸形率及死亡率显著增大。

The results of RT-PCR showed that PPO mRNA was expressed in the integument,haemocyte,head,testis,ovary,fat body and midgut of 5th instar larvae and at different developmental stages of B.mandarina.

组织特异性表达分析表明了该基因在野桑蚕5龄幼虫的血细胞、体壁、头部、精巢、卵巢、脂肪体和中肠等组织及其不同的发育阶段均有表达。

The hatching rates of the eggs laid by ladybirds pretreated with 6 insecticides by two methods all reduced compared with that of control.

药剂处理异色瓢虫成虫后，其所产卵的孵化率和初孵幼虫的存活率均明显降低。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。