英语语法分析

Larvicidal oil or larvicide (such as temephos, Bacillus thuringiensis subspecies israelensis etc.) can be applied to stagnant water.

可向积水中加入蚊油或杀幼虫剂（例如双硫磷、杆菌属亚种苏云金杆菌等）。

The larvicidal activity of avermectin was significantly higher than that of spinosad, and both decreased with increase of the larval age.

对幼虫的生物活性，均随虫龄的增加而下降，且集琦虫螨克的活性远比菜喜高。

Objective:To observe the larvicidal activity of the dried genetically engineered Cyanobacteria against the larvae of Culex pipiens pallens.

目的：观察干燥贮存的基因工程藻对淡色库蚊幼虫的杀灭效果。