中国东北的吉林省和黑龙江省多个市县近日发现蝗虫,一平方米的密度最高达到50只。
吉林省吉林市农业农村局近日发布紧急通知,该市蛟河市、桦甸市、永吉县、龙潭区、昌邑区、船营区等地的部分荒地、林地、岗地等处已发生蝗虫为害,呈点片发生。
当局指出,全市蝗虫发生面积约13.4公顷,平均发生密度10只-20只/平方米,密度高的可达50只/平方米,为害部位大都为阔叶草本植物的嫩叶,危害状为缺刻状,个别导致整片叶子被吃光。
无论如何,当局表示,全市农田尚未发生蝗虫为害,目前蝗虫处于蝗蝻阶段,要求全力做好蝗虫监测与防控。
另一方面,黑龙江省林业和草原局也发通报,自5月中旬以来,黑龙江省哈尔滨市周边区、县(市)在林地边缘出现小面积高密度蝗蝻,局部区域情况相对比较严重。
通报说,截至目前,全省除哈尔滨市周边已报告的5个区、县(市)发生蝗虫虫情2万4631亩外,佳木斯市郊区和桦川县也发现小面积蝗虫虫情,总计面积约50亩左右。
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