我县种植榆树近千万株,几年来连续大发生榆兰叶甲(即榆兰金花虫),对榆树危害十分严重。曾用乐果乳剂涂环防治,也取得良好效果,但花费资金多,用药多,而且对人畜安全有很大影响。从去年开始摸索生物防治的途径,经调查,饲养和观察,初步取得一些线索,现作如下简单介绍,仅供参考。 Nearly 10 million elm trees planted in our county, a large number of consecutive years occurred Elm leafhopper (ie, elm gold flower insects), the elm tree is very serious harm. Had dimethoate emulsion ring control, also achieved good results, but spent more money, medication and more, but also have a great impact on human and animal safety. Starting from last year, we explored the ways of biological control. After investigation, feeding and observation, we initially obtained some clues. The brief introduction is as follows for reference only.