今年6月以来,一种危害玉米的害虫——二点委夜蛾在我国大面积发生,河北、河南、山东、安徽等省发生较为严重,其中河北发生面积近1000万亩,尤以中南部地区为重。针对二点委夜蛾这种新耕作制度下的新发生害虫,河北 Since June this year, a pest that endangers corn - two-spotted night-worm occurs in our country in a large area, with serious occurrences in Hebei, Henan, Shandong and Anhui provinces, of which nearly 10 million mu have occurred in Hebei, The area is heavy. Aiming at the new pest occurring under the new tillage system of the second order litura, Hebei