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每种农药都有一定理化性质和防治对象,弄清施药窍门就有可能取得较好的防治效果。 1、硫制剂对白粉病类有特效,而对霜霉病类无效;铜制剂对霜霉病类有效,而对白粉病类无效。 2、代森锌对锈病、晚疫病、炭疽病有特效,而对白粉病无效。 3、辛硫磷杀虫剂、氟乐灵除草剂遇光易分解;而西玛津、克芜踪等除草剂光照越强,杀草效果越好。 4、在湿度高、雾气大、露水重时喷施波尔多液,容易发生药害。 5、甲胺磷应严禁在蔬菜、果树、茶树上使用,粮食作物在收获前一个月也应禁止使用。
Each pesticide has certain physical and chemical properties and prevention and treatment targets, clarify the application of tricks may be able to achieve better control effect. 1, Sulfur preparations have special effects on powdery mildew, but not on downy mildew; copper preparations are effective against downy mildew and powdery mildew. 2, dezincin zinc rust, late blight, anthrax have special effects, and powdery mildew invalid. 3, phoxim insecticide, trifluralin herbicide in case of light easy to decompose; and Simazine, 克 芜 trace and other herbicides light stronger, the better grass killing effect. 4, in the high humidity, fog, spray heavy dew when Bordeaux mixture, prone to injury. 5, methamidophos should be strictly prohibited on vegetables, fruit trees, tea trees, food crops in the month before harvest should also be banned.