河南省森防站3月22日预计2013年全省主要林业有害生物总体呈偏重发生态势,发生面积预计为902万亩。松材线虫病控灾形势依然严峻,美国白蛾呈扩散加剧态势,杨树食叶害虫呈高发态势,杨树病害、经济林有害生物发生稳中略有上升;草履蚧、杨树蛀干害虫、松树食叶害虫、栎类食 Forest Prevention Station of Henan Province on March 22 It is estimated that in 2013 the province’s major forestry pests will generally have the tendency to occur with an area of ​​902 million mu. Pine wood nematode disease control situation is still grim, the United States showed an aggravating trend of the proliferation of white moths, poplar leaf pests showed a high posture, poplar disease, economic forest pests steady rise slightly; Carassius auratus, poplar borer pests, pine Leaf insect pests, oak-type food