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日本群岛的地理位置为各种植物的生长、也为大量病害的流行提供了温暖、湿润的有利气候条件。日本约有一半耕地(540万公顷)用于种植水稻,另一半用来栽培蔬菜、水果和其他作物。与水稻栽培比较,蔬菜和水果的种植面积较小。因此,为了增加收入,农民不得不进行集约化耕作和连作。伴随着大量施肥的集约化栽培的发展,农作物产量增加了,但也使作物的发病率提高了。杀菌剂在植物病害防治中起了重要的作用。现在,若不使用防治主要病害的化学药剂,
The geographical location of the Japanese archipelago for the growth of a variety of plants, but also for the epidemic of a large number of diseases provides a warm, moist and favorable climatic conditions. About half of Japan’s cultivated land (5.4 million hectares) is used to grow rice and the other half is used to grow vegetables, fruits and other crops. Compared with rice cultivation, vegetables and fruits planted a smaller area. Therefore, in order to increase their income, farmers have to carry out intensive farming and continuous cropping. With the intensive cultivation of large amounts of fertilizers, crop yields have increased, but crop yields have also increased. Fungicides play an important role in plant disease control. Now, if you do not use chemicals that control major diseases,