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农药是保证现代化农业高产、稳产的重要因素。据国外统计如不使用农药,粮食总收成的一半就会被各种病虫害和荒草所吞噬。我国自解放以来,农药总产量居世界第四位,品种达九十余种。随着当代新农药的不断出现,旧农药毒性高而残留期长的已被淘汰。但我国目前新农药的生产,尚不能完全满足需要,以致个别毒性高而残留期长的农药,还不得不继
Pesticide is an important factor to ensure the high yield and stable yield of modern agriculture. According to foreign statistics, if pesticides are not used, half of the total grain output will be swallowed up by various pests and weeds. Since the liberation of our country, the total output of pesticides ranks the fourth in the world, with more than 90 varieties. With the continuous emergence of new modern pesticides, old pesticides with high toxicity and long residual period have been eliminated. However, at present, the production of new pesticides in our country still can not fully meet the needs. As a result, some pesticides with high toxicity and long residual period still have to be followed