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毒性过高的除草剂很容易造成药害问题,因此不建议使用,但是如果判定自己购买除草剂的毒性呢?判定除草剂的毒性通常有4种方法。1喷雾法模拟林间实际防治情况下而设计的喷雾方法,为了减少试验误差,使每一个供试昆虫尽量接受到相同的药量,要求喷雾器有一定的压力,使雾点大小一致,喷雾均匀。2液浸法将供试昆虫分别放入不同浓度的稀释药液中浸渍一下,立即取出,放在吸水纸上吸去过多的药液,移入每一组的盛器中,给以新鲜叶片作饲料,盛器上加盖纱布或纱网,饲养于室内,记录室温,观察不同时
Too toxic to the herbicide is very easy to cause phytotoxicity problems, it is not recommended to use, but if you determine the toxicity of the purchase of herbicides it? Determination of the toxicity of herbicides usually have 4 ways. 1 spray method to simulate the actual prevention and control of the forest and the design of the spray method, in order to reduce the test error, so that each test insect as much as possible to receive the same dose, the sprayer requires a certain pressure to fog point the same size, uniform spray . 2 liquid immersion test insects were placed in different concentrations of diluted liquid immersion, immediately removed, put on absorbent paper to absorb too much liquid, into each group of containers, give fresh leaves for Feed, containers stamped gauze or gauze, reared in the room, record room temperature, observe different time