苍耳、万寿菊、菖蒲粗提液对菜青虫的防效试验

Effect of Extracts from Siberian Cocklebur, Aztec marigold, Calamus Against Cabbage Worm

将苍耳种子、茎，万寿菊茎叶、花，菖蒲根、叶分别加入适量水稍加处理得到浸出液即粗提液。用粗提液直接防治菜青虫的试验结果表明，室内试验，苍耳籽、菖蒲叶粗提液浸包莱叶片饲喂3～6龄菜青虫，死亡率达100．0％，同时拒食率达70％以上；田间试验，苍耳籽、万寿菊花粗提液的防效高达100．0％，菖蒲叶粗提液防效达88．2％。

The Siberian cocklebur seed, stem, the aztec marigold stem and leaf, flower, the calamus root, leaf were put into water separately to be extracted. The fluid was used to prevent the eabbage worm in the laboratory directly, using the achene of xanthium sibiricum, calamus leaf extract the fluid soaks, the cabbage leaf blade to feed 3-6 instar cabbage worms, the mortality rate reaches 100%, simultaneously the hunger strike rate reaches 70% rounds. In the field trial, the long life chrysanthemum extract raise the against effect rate of the athene of siberian cocklebur, and aztec marigold to 100%, of calamus is 88.2%.