Antifeedant Activity and Active Ingredients Against Plutella xylostella from Momordica charantia Leaves  

作　　者：LING Bing WANG Guo-cai YA Ji ZHANG Mao-xin LIANG Guang-wen 

机构地区：[1]Laboratory of Insect Ecology, South China Agricultural University, Guangzhou 510642, P.R.China [2]Institute of Traditional Chinese Medicine ＆ Natural Products, Jinan University, Guangzhou 510632, P.R.China

出　　处：《Agricultural Sciences in China》2008年第12期1466-1473,共8页中国农业科学（英文版）

基　　金：the grants from the National Natural Science Foundation of China (39930120)

摘　　要：With the bioguided fractionation of the ethanol extracts from the leaves of Momordica charantia, we obtained two most active compounds against the feeding of the diamondback moth, Plutella xylostella larvae. The antifeedant activity of momordicine Ⅰ and momordicine Ⅱ against the second and the third instar larvae of Plutella xylostella were tested using leaf discs of cabbage in the laboratory. The results showed that momordicin Ⅰ and momordicin Ⅱ had significant antifeedant activity on the larvae of P. xylostella, and momordicin Ⅱ was more active than momordicin Ⅰ. The concentrations for 50% antifeedant effects （AFC50） of momordicin Ⅱ against the second and the third instar larvae of P. xylostella were 76.69 and 116.24μg mL^-1, whereas that of momordicin I was 144.08 and 168.42μg mL^-1, respectively. In addition, momordicin Ⅰ and momordicin Ⅱ had significant inhibitive effect on the rate of weight gain and survival of P. xylostella larvae.With the bioguided fractionation of the ethanol extracts from the leaves of Momordica charantia, we obtained two most active compounds against the feeding of the diamondback moth, Plutella xylostella larvae. The antifeedant activity of momordicine Ⅰ and momordicine Ⅱ against the second and the third instar larvae of Plutella xylostella were tested using leaf discs of cabbage in the laboratory. The results showed that momordicin Ⅰ and momordicin Ⅱ had significant antifeedant activity on the larvae of P. xylostella, and momordicin Ⅱ was more active than momordicin Ⅰ. The concentrations for 50% antifeedant effects （AFC50） of momordicin Ⅱ against the second and the third instar larvae of P. xylostella were 76.69 and 116.24μg mL^-1, whereas that of momordicin I was 144.08 and 168.42μg mL^-1, respectively. In addition, momordicin Ⅰ and momordicin Ⅱ had significant inhibitive effect on the rate of weight gain and survival of P. xylostella larvae.

关 键 词：Momordica charantia Plutella xylostella antifeedant activities momordicin Ⅰ momordicin Ⅱ 

分 类 号：S48[农业科学—农药学]