Studies on Repelling Activity of Extracts from Chromolaena Odorata L. Against Plutella Xylostella l.
飞机草提取物对小菜蛾产卵驱避活性的研究。
The indices of aggregation indicate that the larvae and pupae of plutella xylostella present aggregated distribution in the field.
聚集度指标检验结果显示，幼虫、蛹在田间呈聚集分布。
Using the method of relational grade of grey system, the abiological factor influencing Plutella xylostella population from 1991 to 1995 were analyzed.
应用灰色系统关联度分析方法，对1991～1995年的5年间影响小菜蛾成虫田间种群数量的非生物因子进行分析。
Parasitizing ability and interspecific competition of Trichogramma confusum Viggiani and T. pretiosum Riley on the eggs of Plutella xylostella (L. ) in the laboratory;
在实验室内研究了本地天敌拟澳洲赤眼蜂和外来天敌短管赤眼蜂在不同卵龄和不同空间条件下对小菜蛾卵的寄生和种间竞争。
The Plutella xylostella can be controlled after using wood vinegar 500x combined with spinosad 1000x. The utilization of the pesticide can be reduced in the actual production.
木酢液500倍液混用菜喜1000倍液，可较好地控制小菜蛾的发生与为害，在实际生产中，可以进一步减少农药的使用量。
The extracts of acetone and petroleum ether had no effect to the hatching rate and egg development duration, but they were toxic to the newly hatched larvae of Plutella xylostella.
丙酮和石油醚提取物对小菜蛾卵的孵化及卵的发育历期没有影响，但有增加初孵幼虫死亡率的作用。
Studies on the controls of Diamondback moth plutella xylostella by complex biological pesticide of Bacillus thuringiensisIn this study, biological test was performed based on plutella xylostella .
本研究以小菜蛾为试虫进行生物测定，在苏云金杆菌菌株筛选基础上对菌株混用、复配剂配方筛选及其田间防治效果进行了研究。
Studies on the controls of Diamondback moth plutella xylostella by complex biological pesticide of Bacillus thuringiensisIn this study, biological test was performed based on plutella xylostella .
本研究以小菜蛾为试虫进行生物测定，在苏云金杆菌菌株筛选基础上对菌株混用、复配剂配方筛选及其田间防治效果进行了研究。
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