核桃青皮中次生代谢物质的生物活性研究Ⅰ杀虫活性

A Study on the Bioactivity of Secondary Metabolites from Walnut Green Gull

对核桃青皮中次生物质的杀虫活性研究,结果表明:核桃青皮95%乙醇粗提物及其乙酸乙酯萃取部分对粘虫有较明显的拒食作用,且乙酸乙酯萃取部分有明显的胃毒作用。但对小菜蛾而言,石油醚萃取物和乙酸乙酯萃取物的拒食作用不如对粘虫作用明显。研究还表明,随乙酸乙脂萃取物浓度的变化,粘虫的拒食率、死亡率及生长发育抑制率都会有相应变化。且随着萃取物浓度的增加,对粘虫的拒食作用增强。

The green walnut hull extract with 95% ethanol and the fraction extracted from the extract above with ethyl acetate have obvious anti-feeding effect on armyworm and small vegetable-moth, and the fraction has obvious stomach poisoning effect. On contrast, the anti-feeding effects of the extracts from petroleum ether and ethyl acetate to small vegetable-moth are smaller than those to armyworm. The results also indicate that anti-feeding rate and death rate as well as growth inhibition rate of armyworm have correspondingly changed with the concentration change of the extract： the higher the concentration of extracts applied on armyworm, the bert the anti-feeding effect.