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玉米耕葵粉蚧(Trionymus agrealisWang et Zhang)是我省玉米新发现的一种害虫。80年代末在赵县、满城玉米田内发现,目前已扩散到保定、廊坊、唐山等地。今年我市在安次区、固安、永清、香河等县点片发生,发生面积10万亩左右。成为我市玉米上的主要害虫之一。玉米耕葵粉蚧不但为害玉米,还为害小麦、高粱等禾本科作物和杂草。1 为害及发生1.1 为害玉米耕葵粉蚧以若虫和雌成虫群体在地表以下玉米、小麦茎基部吸食汁液,进行为害造成小麦、玉米叶片发黄,生长缓慢或枯萎。玉米受害严重时茎基变粗,不能结
Trionymus agrealis Wang et Zhang is a newly discovered pest of corn in our province. In the late 1980s, it was found in the cornfields of Zhao County and Mancheng that it has now spread to places like Baoding, Langfang and Tangshan. This year, the city in Anci District, Gu’an, Yongqing, Xianghe and other county spots occurred, the area of about 10 acres. Become one of the major pests on our city corn. Corn Anemones mealybugs not only harm corn, but also damage to wheat, sorghum and other grasses and weeds. 1 Harmful and Occurred 1.1 Harmful corn Cornflower mealybug to nymphal and female adult population below the surface of corn, wheat stem base to drink juice, causing damage to wheat, corn leaves yellow, slow growth or withered. Corn serious damage stem base thick, can not knot