夏棉晚春播对棉铃虫的控制效果近年来山东省一些单位为了繁殖夏棉良种，将夏棉品种中棉所１６号提前到５月上中旬播种，称晚春棉，棉铃虫危害减轻。据在陵县调查，二代棉铃虫卵盛朗，晚春棉还未达到盛蕾期，落卵量少，百株累计卵仅为春棉的３３％，不必施药防治，而春棉需... Control effect of cotton bollworm on bollworm in late spring cotton In recent years, some units in Shandong Province planted cotton bollworm No. 16 ahead of middle May in order to breed summer cotton varieties, alleviating the harm of late spring cotton and bollworm. According to the investigation in Ling County, the second generation of cotton bollworm eggs Shenglai, late spring cotton has not yet reached Shenglei period, less eggs, a total of 100 strains of spring cotton only 33%, no pesticide control, and spring cotton needs. ..