菜虫净对辣椒棉铃虫的防效评价

菜虫净是中国热带农业科学院环境与植物保护研究所研发出的一种环境友好复合型防治瓜类、辣椒、豇豆害虫、害螨与线虫中试药剂。为了进一步科学、合理使用菜虫净防治瓜类、辣椒、豇豆害虫、害螨与线虫的发生与危害，探讨其对作物生长发育的安全性，以辣椒品种台湾特大黄皮角辣椒为研究对象，就菜虫净对棉铃虫的防治效果及其处理前后辣椒种子发芽率、幼苗长势、移栽后辣椒株高、主茎粗、叶宽、分枝茎长、花蕾数进行了比较分析。试验结果表明，菜虫净1000倍液、1500倍稀释液不仅对棉铃虫具有良好的防治效果，而且对植株生长具有良好的促进作用；菜虫净500倍液虽然对棉铃虫具有良好防治效果，但植株生长畸形。因此，综合考虑经济、高效和简便等因素，菜虫净1000—1500倍稀释液可广泛用于防治棉铃虫的发生与危害。

Control effects of Caichongjin on Helicoverpa armigera of capsicum

Abstract： The Calchongjin developed by Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sci- ences, is a non-polluted compound pesticide and very effective to insects of vegetable crops. To scientifically and reasonably control insects of vegetable crops with it and make sure of its safety to crop development, its control effects and safety to the rate of seed ger- mination, Seedling growth, transplanted plant height, main stem diameter, leaf width, length of branching stems, number of buds were studied with the large and yellow Taiwan~ t：ultivar capsicum. The results showed that, 1000-~old dilution and 1500-fold dilution were better to control Helicoverpa armigera and for the development of capsicum; 500-fold dilution was also better to control H. ar- migera, but the plants could not normally develop. However, 2500-fold dilution and 3000-fold dilution were not effective to control H. armigera. Given the economic, efficient and simple operation, 1000- 1500-fold dilution of Caichongjin can be widely applied to control H. armigera.