近年来我旗各地普遍发生地老虎,造成轻重不同程度的损失,特别在甜菜产区被害轻的缺苗断壠,严重的毁种。在历午防治经验的基础上,1964午采用毒土、毒砂的办法进行示范防治,收到了圆满的防治效果,杀虫率达94.2％,对四龄以上老熟幼虫亦有85％以上的效果。具体办法是:每亩用6％666粉一份、湿 In recent years, common occurrences of tigers in various parts of the country have caused losses of different degrees of severity. In particular, they have been severely damaged by the lack of light seedlings that have been killed in sugar beet producing areas. On the basis of experience in the prevention and treatment of the floods in the past 1964, poisonous sand and arsenopyrite were used for demonstration control. The control effect was achieved satisfactorily with a pesticidal rate of 94.2% and over 85% of mature larvae over the fourth age effect. The specific approach is: a 666% powder with 6% per acre, wet