(一)趋势预报据各棉铃虫区域测报站监测,今年全国大部棉区一代棉铃虫幼虫总残虫量普遍偏低;受春季异常气候影响,棉花前期长势较弱,一类棉田面积比率较常年下降;结合6月份气象条件综合分析,预计今年第二代棉铃虫发生面积约3300万亩;黄河流域棉区为重点发生地区,其中,山东西北部、河北南部大(5级)发生,山东和河北其余地区、河南北部和东部、新 (I) Trend Forecast According to the monitoring stations of each bollworm regional monitoring station, the total amount of the larvae of the first generation cotton bollworms in most cotton-producing areas in China this year is generally low. Due to the abnormal climate in spring, cotton has a weak growth in the first half of the year. According to the comprehensive analysis of meteorological conditions in June, it is estimated that the second generation of cotton bollworm will have an area of ​​33 million mu this year; the cotton area of ​​the Yellow River Basin will be the key area of ​​occurrence, of which, the northwestern Shandong and southern Hebei will occur in Grade 5, And the rest of Hebei, northern and eastern Henan, new