毒麦是麦田常见的一种检疫性杂草,目前已在全国不少地区造成危害,对三麦生产威胁较大,试验结果表明,每平方米麦田毒麦的密度达到5～10、11～20、21～35株时,麦子产量分别减少0.5～4.8％、4.9～8.4％和8.6～12.6％。不仅如此,而且对人畜也是有害的,据报道,人畜如果食用含4％毒麦成分的面粉,即可发生中毒现象。因此,必须认真防除。我们在近5年内对毒麦进行化学防除,其技术介绍如下: 一、用药时间在毒麦两叶期用药效果较佳,此时幼苗嫩弱,抗逆性差,易被杀害,药液又可直接喷酒到植株上;在麦子播种后出苗前这段时间也可用药。二、用药种类经过1987～1989三年的多点 Poisonous wheat is a common quarantine weed in wheat field, which has caused harm in many areas of the country and threatens the production of Sanmai. The test results show that the density of wheat per square meter of wheat field reaches 5 ~ 10,11 ~ The yield of wheat decreased by 0.5 ~ 4.8%, 4.9 ~ 8.4% and 8.6 ~ 12.6% respectively when it was 20 and 21 ~ 35 plants. Not only that, but it is also harmful to humans and animals. It is reported that poisoning can occur if people and animals eat flour containing 4% toxic wheat ingredients. Therefore, we must carefully control it. We in the past 5 years on the toxic chemical control of wheat, its technology is as follows: First, the medication time in the two-leaf stage of drug use better, then tender young seedlings, resistance is poor, easy to be killed, the liquid can be Spray directly to the plant; in the wheat seedling before this time can also be used medicine. Second, the type of medication after 1987 ~ 1989 three years of more