山东省农作物病虫测报站近日预报今年全省主要棉区二代棉铃虫发生5级(大发生),潍坊、鲁南棉区部分地区4级(中等偏重发生)。大部分棉区一代成虫发生盛期比历年偏晚1~5天,为6月15日至30日左右,而鲁南棉区一代成虫发生盛期则比历年偏早1~2 Shandong Province pest forecasting station recently predicted that the second generation cotton bollworm in the main cotton area of ​​this year occurred in the fifth grade (large occurrence), Weifang and Lunan cotton areas in some areas (moderate emphasis occurred). The prevalence of the first generation of adult cotton in the cotton area lasted 1 to 5 days later than the previous year, ranging from June 15 to June 30, while the peak in the first generation of adult cotton in the Lunan cotton area was 1-2 days earlier than previous years