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经实践证明；采用天然无公害杀虫剂防虫具有安全、经济有效等优点，它无污染、无残留、速杀性强、持效期短、配制简便、经济实用、功效独特，是生产天然无公害蔬菜的有效途径。现将几种常用方法介绍如下： 草木灰杀虫法：草木灰是重要的农家肥，它含有丰富的钾等矿物质，有极好
It has been proven by practice that it is safe, economical and effective to use natural pollution-free insecticide. It has no pollution, no residue, quick kill, short holding time, simple preparation, economical and practical, Effective ways of pollution of vegetables. Now introduce several common methods are as follows: Straw ash insecticidal law: Ash is an important manure, it is rich in potassium and other minerals, there are excellent