棉铃虫中长期预报技术赵瑗玲（湖北枝江县植保站，４４３０００）我站建站以来，棉铃虫系统测报资料至今已有３ｌ年。为了进一步提高预测预报水平，笔者将其中长期预报技术介绍如下。ｌ发生期预报我县多年来发生期预报主要采用以下几种方法：期距法、虫龄分析法、物候法及... Long-term forecasting technology of cotton bollworm Zhao Ling (Plant Protection Station, Zhijiang County, Hubei Province, 443000) The data of the bollworm system has been reported for 31 years since the establishment of the station. In order to further improve the level of forecasting and forecasting, the author introduces the medium and long term forecasting technologies as follows. l Occurrence of forecasting Occurrence in the county forecast over the years mainly uses the following methods: period method, insect age analysis method, phenological method and ...