摘要
对8种重要农林害虫的生测结果说明,苦皮藤麻醉有效成分对昆虫具有选择麻醉作用。槐尺蠖(Cemiothisa cinerearia)、粘虫(Mythimna separata)和菜青虫(Pieris rapae)5龄幼虫分别摄食97.4、122.6和142.1μg(药剂)/g(体重)的剂量,即有50%的试虫被麻醉;而甘蓝夜蛾(Barathra brassicae)、小地老虎(Agrotis ypsilon)、八字地老虎(Agrotis c-nigrum)、银纹夜蛾(Plusia agnata)和黄地老虎(Agrotissegetum)5龄幼虫分别摄食2620.5、1406.5、1980.3、2407.7和1925.0μg(药剂)/g(体重)的剂量亦无一供试个体被麻醉或中毒。生化分析结果进一步指出,昆虫中肠羧酸酯酶的活性及酯酶同功酶的差异是这种选择麻醉作用的重要机制。
The bioassay results of the narcotic ingredients of Celastrus angulatus against 8 species of insect pests showed that the ingredients had selective narcotic action., the 5th—instar larvae of Cemiothisa cinerearia, Mythimna separata, Pieris rapae could be narcotized, ND_(50) (the dose required to narcotize 50% of the population) was 97.4, 122. 6, 142. 1 μg/g; no individual of the 5th—instar larvae of Barathra brassicae, Agrotis ypsilon, Agrotis c-nigrum, Plusia agnata, Agrotis segetum would be narcotized or poisoned even though the dose was 2620. 5, 1406.5, 1980.3, 2407.7, 1925.0 μg/g respectively. The results of biochemical analysis indicated that the difference of the activity of carboxylesterase and esterase isozymes in the larval midguts were the main mechanism of this selective toxicity.
出处
《西北农业学报》
CAS
CSCD
1993年第2期31-36,共6页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家自然科学基金
关键词
苦皮藤
毒性
昆虫
Celastrus angulatus
Selective toxicity
Carboxyesterase
Esterase isozyme
