一、2002年发生与防治情况 2002年全省森林病虫鼠害实际发生面积为549万宙,其中虫害451万亩、病害93万亩、鼠害5万亩。重点是红脂大小蠹、松毛虫、杨树蛀干害虫、美国白蛾和杨树食叶害虫等。 (一)松毛虫:实际发生面积155万亩,中重度发生80万亩,主要发生地区为承德市的平泉、隆化、滦平、兴隆、承德 I. Occurrence and Control in 2002 In 2002, the actual area of ​​pests and diseases occurring in forests throughout the province was 5.49 million hectares, of which 451 million were pests, 93 million were diseases and 50,000 mu were rats. The focus is red beetles, pine caterpillars, poplar borer pests, white moth and poplar leaf insect pests. (A) Dendrolimus: The actual area of ​​1550000 mus, the occurrence of 800000 acres of moderate and severe, the main occurrence areas of Chengde city of Pingquan, Longhua, Xinglong, Xinglong, Chengde