由于持续干旱、水库及洼淀大面积脱水,今年东亚飞蝗在河北省的岗南水库、衡水湖、岳城水库、白洋淀周围发生严重,面积达40余万亩。 据省、地、县植保站调查,岗南水库发生6.4万亩,一般每平方米4—7头,最高达300—500头;衡水湖发生10余万亩,平均每平方米1头左右,其中每平方米1000头以上 Due to the continuous drought and the large-scale dewatering of reservoirs and depressions, this year East Asian migratory locusts have been severely damaged in Gangnan Reservoir, Hengshui Lake, Yuecheng Reservoir and Baiyangdian Lake in Hebei Province, covering an area of ​​more than 40 mu. According to the provincial, prefectural and county plant protection station survey, Gangnan Reservoir occurred 6.4 million mu, usually 4-7 per square meter, up to 300-500 head; Hengshui Lake occurred more than 10 mu, an average of about 1 per square meter, Of which more than 1,000 per square meter