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农村实行生产责任制以来,农民学科学、用科学的要求十分迫切。本文仅就许多读者的咨询,谈谈合理使用农药的几个问题:①农药的分类;②农作物部分病虫害及适用药剂;③农药的使用方法;④安全使用农药。一、农药的分类凡是保护农林作物不受虫害、病菌、鼠害和杂草为害,保证正常生长和收获的药剂(包括各种植物生长调节剂),统称为农药。农药的种类很多,一般按其用途、作用和成分来分类。以用途来分,防治害虫的叫杀虫剂;防治螨类(如红蜘蛛)的叫杀螨剂;防治病害的叫杀菌剂;防治线虫的叫杀线虫剂;毒杀鼠类的叫杀鼠剂;消灭杂草的叫除草剂;调节植物生长的叫植物生长调节剂.有些药剂,既能杀虫,又可灭菌,或兼具杀虫、灭菌、除草等多种作用,通常按其主要
Since the implementation of the responsibility system for production in rural areas, peasants’ scientific and scientific requirements are very urgent. This article only on the consultation of many readers to talk about the rational use of pesticides several issues: ① classification of pesticides; ② crop pests and diseases and some pesticides; ③ the use of pesticides; ④ the safe use of pesticides. First, the classification of pesticides Any protection of agriculture and forestry crops from pests, germs, rodents and weeds to ensure the normal growth and harvest of the agents (including a variety of plant growth regulators), collectively referred to as pesticides. There are many types of pesticides, generally classified according to their purpose, role and composition. To use points to control pests called pesticides; control mites (such as red spider) called acaricide; control of diseases called fungicides; control of nematodes called nematicides kill; Called weeds to eliminate weeds; plant growth regulators to regulate plant growth. Some agents, both insecticidal, but also sterilization, or both insecticidal, sterilization, weeding and other effects, usually by Its main