苦皮藤种油对几种蔬菜和贮粮害虫拒食的研究

室内测定表明:苦皮藤种油对菜青虫、黄守瓜、猿叶虫、28星瓢虫等4种蔬菜害虫有明显的拒食作用,对赤拟谷盗、谷蠹具有较明显忌避作用,对玉米象有明显的拒食作用、干扰产卵及抑制卵的孵化作用,对四纹豆象有较高的防治效果。田间试验效果:防治青菜虫用2%、0.66%、0.5%的苦皮藤种油,防效分别为86.5%、91.16%、85.37%,10%氯氰菊酯5000倍液为89.6%,苦皮藤根皮粉为79.81%。所以,苦皮藤种油与菊酯类农药的效果相似。

THE CONTROLLING EFFECTS OF ANGLED BITTERSWEET OIL ON SOME MAJOR DESTRUCTIVE INSECT FOR VEGETABLES AND STORED GRAINS

In laboratory, the seed oil of angled bittersweet possed obvious antifeedent effect on Pieris rapae, Aulacophora femoralis Coiaphellus bowringi, Henosepilachna vigintioctopunctata, and other insects attacking vegetable. In addition it also had obvious repellent effects on Rhizopertha dominica, Tribolium castaneum. When this seed oil was applied, it showed obvious antifeedant effect on Sitophilus zeamains. It also disturbed Sitophilus zeamains to produce eggs and eggs to be hatched. It is effective to control Callosobruchus maculatus. In the field experiments, the effect of controlling Pieris rapae has been showed as follows: 86.5%, 91.6%, 85.37% was obtained respectively by using 2%, 0.66%, 0.5%the seed oil of angled bittersweet; 89.6% by using 10% Cypermethrin diluted 5000 times; and 79.81% by using root-bark powder of angled bittersweet. So the controlling effect of the seed oil of angled bittersweet is closed to that of the insectidies like Cyperthrin.