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When treated with propiconazole for 48 h and 72 h, the LD50 values of propiconazole against 4th instar larvae of S.

在注射处理后48 h和72 h，丙环唑对斜纹夜蛾4龄幼虫的LD50值分别为0.91μg/头和0.63μg/头。

It′s alsoshown that the smaller instar of the larva,the easier the control is.

同时也表明松墨天牛幼虫虫龄越小，越容易防治。

Bimaculata is lay more eggs on the 3〓 instar of B.

在有龄期可选择的条件下，蚜小蜂更多地选择2~3龄若虫产卵。

The toxicity of supernate and precipitate from above treatments to 3 instar armyworm and mealworm larvae were tested.

它必需在合适的PH和蛋白酶的作用下才能释放出对敏感昆虫有毒力的蛋白。

Objective: To investigate toxicity of deoxypodophyllotoxin against 3rd instar larvae of Pieris rapae L. and its effects on activities of AChE and ATPase, and to study its insecticidal mechanism.

目的：研究脱氧鬼臼毒素对3龄菜青虫的毒杀作用及中枢神经系统AChE、ATPase活性的影响，探讨其杀虫机制。

However, the damaged incurred by third instar larvae of the maize stalk borer for 48h had an opposite effect.

信号物质和虫害处理叶片对根际细菌群落的种类和结构产生一定的影响。

Rate of growth of the regenerate legs is faster than that of the normal legs and rate increases with the increase of instar stage.

观察中尚发现，再生足生长速度明显高于正常足。而且，断肢的龄期越高，再生足生长速度越快。

Coli and Tn cells were mixed with Bt and fed to the larvae of second instar of the silkworm B.

结果表明，2种表达产物对Bt杀虫剂均有明显的增效作用。

There were no significant differences in the relative consumption rate and approximate digestibility between the 6 instar larvae reared with two tobacco species.

26龄幼虫对两种烟草的相对取食量和近似消化率无显著差异，但是对黄花烟草的利用率、转化率及其相对生长率显著下降。

The green fluorescence can't be seen in the posterior silk glands of 400 individuals in fifth instar under UV light.

发现这些丝腺都没有出现明显的绿色萤光。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。