近两年来,我们和郊区贫下中农一起,开展使用超低量喷雾器防治农作物病虫的试验,结果表明,使用超低量喷雾器应注意以下几个问题、一、不同防治对象,使用效果不同,要注意区别对待。对作物上部活动为害的病虫,如麦穗部蚜虫、赤霉病、稻纵卷叶螟、稻瘟病等,超低量喷雾的雾点分布复盖较好。在用药剂量相等的情况下,可以达到以至超过常用喷雾器的防治效果。对作物中下部和叶背面活动为害的病虫,如三麦粘虫、棉蚜、水稻纹枯 In the past two years, we have carried out the experiment of using ultra-low-volume sprayers to control crop pests and diseases together with the poor and middle-level peasants in the suburbs. The results show that the following problems should be paid attention to when using ultra-low-volume sprayers. First, Pay attention to different treatment. Plant diseases and insect pests that are harmful to the upper part of crops, such as wheat aphids, scab, rice leaf winters, rice blast, etc, the fog point distribution of ultra-low-volume spray coverage is better. In the case of the same dosage, you can achieve and even exceed the control effect of common sprayer. Diseases and pests that are damaging to the activities of the lower part of the crop and the back of leaves, such as Myrica rubra, cotton aphid,