野生植物苦皮藤种油对几种主要害虫防治研究报告

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,丝绵木金星■蠖、缀叶丛螟等六种害虫有明显的拒食作用;田间试验效果:防治菜青虫,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,苦皮藤种油与氯氰菊酯的效果相近,但优于苦皮藤根皮粉;防治黄守瓜,其防效与增产均优于DDVp。苦皮藤资源丰富,其种油将有可能成为一种很有发展前途的植物性天然产物杀虫剂或拒食剂。

THE CONTROLLING EFFECT OF ANGLED BITTERSWEET OIL ON SOME MAJOR INSECT PESTS ATTACKING VEGETABLE PLANTS

In laboratory conditions the seed oil of angled bittersweet (Celastrus angulatus Maxim.), termed CA oil, possesses obvious antifeedant effect on Pieris rapae, Aulacophora femoralis, Henosepilachna vigintioctopunctata, Locastra muscosalis, Colaphellus bowringi and Calospilos suspecta.In the field experiments the efficiency of controlling Pieris rapae has been shown as follows: 86.5%, 91.16% and 85.37% obtained respectively by using 2%, 0.66% and 0.5% CA oil; 89.6% by using 10% Cypermethrin diluted 5000 times; and 79.81% by using the root-bark powder of angled bittersweet, which indicates that the controlling effect of CA oil is approximate to that of Cypermethrin and better than that of the root-bark powder.The field experiments have also proved that the CA oil exceeds DDVpboth in controlling effect and in yield increase when used against Aulacophora femoralis.Since the angled bittersweet has not only reliable pest-controlling substance in its seed oil, but also many other advantages, such a bundant resources, wide distribution, strong adaptability and high survival rate, it can be expeeted to be an important source of pest-controlling material and the CA oil to be a very promising natural plant insecticide or antifeedant agent.