植物粗提物对褐稻虱成虫取食的影响

分别用31科47种非嗜食植物乙醇提取物处理的稻株饲养褐稻虱Nilaparvata lugensStal成虫,研究对褐稻虱成虫的拒取食作用。结果表明,大多数供试植物提取物对褐稻虱有一定程度的拒取食效果。大蒜、苦楝油、白花非洲山毛豆的提取物对褐稻虱成虫拒食效果最好,24h后的拒取食率分别达89.19%、75.63%与63.74%。薇甘菊、蟛蜞菊、荚竹桃、含羞草、鱼尾葵、艾蒿、人心果和走马箭8种植物提取物拒取食率均达50%以上。相反,莎草、鸡矢藤、甘草、飞机草、地肤、水葫芦、华南毛蕨、假连翘、鼬瓣草、尾叶桉和白花丹11种植物提取物对褐稻虱成虫取食具有一定的刺激作用。

Effect of the ethanol extracts from the non-host plant species on the feeding of the brown planthopper, Naaparvata lugens

Effect of ethanol extracts from the non-host plants of 47 species belonging to 31 families on the feeding of brown planthopper(BPH),Nilapavata lugens Stl was studied in laboratory.The result indicated that majority of the ethanol extracts possessed certain levels of antifeeding effect on BPH adults.At 24 hours after applied the ethanol extracts of Allium ampeloprasum,Melia azedarach,Tephrosia vogelli,the antifeeding rates on BPH adults were 89.19%,75.63%,63.74%,respectivelly.The ethanol extracts from Mikania micrantha,Wedelia chinensis,Nerium indicum,Mimosa pudica,Caryota ochlandra,Artemisia princeps,Manikara zapota and Sambucus chinensis,had relatively stronger antifeeding effect on BPH with >50.0% of antifeeding rate.On the contrast,the ethanol extracts from Cyperus spp,Paederia scandena,Glycyrrhiza uralensis,Chromolaena odorata,Kochia scoparia,Eichhornia crassipes,Cyclosorus parasiticus,Durantarepens,Galeopsis bifida,Eucalyptus urophlyl and Plumbago zeylanica,had stimulant effect on BPH feeding.