摘要
室内测定了水葫芦Eichhornia crassipes(Mart.)Solms.乙醇提取物对小菜蛾PlutellaxylostellaL.3龄幼虫的生物活性.结果表明,水葫芦提取物能使小菜蛾幼虫取食量、体重增加量减少,幼虫死亡率增加.提取物浓度越高,这些作用效果越明显.在选择性和非选择性的条件下,水葫芦提取物对3龄幼虫的拒食中浓度(AFC50)分别为66.09 g/L和293.35 g/L.
The effects of ethanol extracts from Eichhornia crassipes on the larvae of diamondback moth Plutella xylostella were investigated in laboratory by measuring antifeeding action of the extracts, body weight gains of the larvae and larval mortality after the larvae had fed on the extracts-coated cabbage leaves. The results indicated that leaf consumption by the insects and body weight gain of the larvae were reduced, and the larval mortality was increased. The higher the concentration of the extracts was, the more severe the effects on the pest were. The results showed that the medium antifeedant concentrations （AFC50） of the extract in case of 3rd instar P. xylostella larvae were 66.09 g/L and 293.35 g/L for conditions of choice and no-choice tests, respectively.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2005年第5期567-571,共5页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
国家自然科学基金重点项目(39930120)
关键词
水葫芦
植物提取物
小菜蛾
拒食作用:生长抑制
杀虫活性
Eichhornia crassipes
plant extract
Plutella xylostella
antifeeding action
growth inhibition
insecticidal activity
