贮花仓库内的越冬红铃虫是田间红铃虫发生的主要虫源之一。过去曾利用多种防治方法,但效果还不够理想。据中国农业科学院江苏分院报告:近两年来试用敌敌畏防治越冬红铃虫,已获初效。在此基础上,我们于1964年4月下旬至5月中旬,对全县的贮花棉仓开展了敌敌畏(50％乳油,天津农药厂1964年2月产品)大面积的防治示范。全县13个植棉公社2,299个生产队和13个轧花厂、28个棉花收购站,共有3,217个贮 Overwintering pink bollworm in the storage warehouse is one of the main insect sources in the field. In the past, various prevention and treatment methods were used, but the effect was not satisfactory. According to the report of Jiangsu Branch of Chinese Academy of Agricultural Sciences, trial of dichlorvos in the past two years to control overwintering red bollworm has been early effect. On this basis, we conducted a large-scale prevention and control demonstration of dichlorvos (50% EC and Tianjin Pesticide Factory in February 1964) on cotton storage silos throughout the county from late April to mid-May 1964. The county 13 cotton plantations 2,299 production teams and 13 ginning plants, 28 cotton acquisition stations, a total of 3,217 storage