在日本由于结构的原因,1991年农药的总体形势和农药的需要仍呈下降趋向.其因包括继续实行减少稻田耕种面积(83万公顷或30%)以及存在减少使用农药的普遍观点所致.1991年是一个多雨的气候,终年少晴且台风经常侵袭,这就导致水稻病害大发生和叶蝉暴虐.这样,在连续11年的丰收后,于1991年出现了水稻减产收成仅为常年的95%,总产量约965.4万吨,比原计划减少了60万吨.对此,日本农业厅作出了相应的反应,他们决定重新考虑水稻种植的政策,并调查暂缓减少水稻栽种面积5~10万公顷的可能性.在 In Japan, due to structural reasons, the overall situation of pesticides and the need for pesticides continued to decline in 1991. This was due to the continued implementation of reduced rice cultivation area (830,000 hectares or 30%) and the existence of a general view of reducing the use of pesticides. In 1991, it was a rainy climate, with very little sunshine and typhoons all the year round. This led to the occurrence of rice diseases and leaf plague. As a result, after 11 years of bumper crops, rice production was reduced only in 1991. 95% of the total output is about 9.654 million tons, which is 600,000 tons less than originally planned. In response to this, the Japanese Agriculture Department responded accordingly. They decided to reconsider the rice planting policy and investigated the deferred reduction of rice planting area 5~10. 10,000 hectares of possibilities.