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棉铃虫是关中棉区棉花上的主要害虫,开展测报工作已达多年,长期以来,由于测报水平落后,加之行政区域限制,对棉铃虫测报缺乏宏观指导,与生产发展不相适应。为了掌握不同地区棉铃虫的发生规律,在不同区域建立预测模型,开展分区预报。1986年到1988年,我们通过整理分析大荔泾阳等县历年棉铃虫发生世代、发生期、发生程度为害损失等观测资料,研究本省棉铃虫预测预报区的划分,制定了关中棉区棉虫测报资料统计标准现分述如下:
Cotton bollworm is the main pest on cotton in Guanzhong cotton area. The work of measuring and reporting for cotton bolls has been carried out for many years. For a long time, cotton bollworm lacks macroscopical guidance and incompatible with the development of production because of the backward reporting level and administrative restrictions. In order to grasp the occurrence rules of cotton bollworm in different regions, a prediction model was established in different regions to carry out zonal prediction. From 1986 to 1988, by analyzing and analyzing the observed data of generation, occurrence and degree of damage of cotton bollworm in Dali Jingyang County over the past years, we studied the division of forecast and forecast area of cotton bollworm in this province, Data statistics standards are as follows: