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一、化学除草剂应用简况我省属低纬度、高海拔季风湿润气候区,雨量充沛,雨热同季,无霜期长,给杂草繁衍创造了有利条件,所以杂草种类繁多,随作物生态环境不同,杂草群组成也不一样。据全国农田草害调查,我国农田受杂草危害损失粮食产量约175亿公斤,所以我国从50年代末开始施用除草剂,我省60年代开始试验,70年代示范推广,但化除面积少,发展不平衡,局面未打开。到了80年代,特别是最近几年,化除发展速度快,农民对化除的要求愈来愈迫切,如1985年以前,
First, the application of chemical herbicide Brief introduction The province is a low latitude, high-altitude monsoon humid climate zone, abundant rainfall, heat season, long frost-free period to the weed breeding has created favorable conditions, so a wide range of weeds, with crop ecological environment Different, weed group is not the same composition. According to the survey of farmland grassland disease in our country, the farmland in China has lost about 17.5 billion kilograms of grain due to damage from weeds. Therefore, our country started to apply herbicides from the late 1950s. Experiments began in the 1960s and were demonstrated in the 1970s. However, Unbalanced development, the situation is not open. By the 1980s and especially in recent years, the demand for chemical elimination by peasants has become more and more urgent. For example, by 1985,