据山东省林业局统计,2006年全省林业有害生物中等偏重发生,全年发生面积759.24万亩,发生率14.67%,同比下降8.17%。其中病害发生203.83万亩,同比下降16.84%;虫害发生555.4万亩,同比下降4.52%。检疫性林业有害生物美国白蛾在全省形成新的扩散,疫情点增加,全省发生16.96万亩,发生面积上升,危害较重;松材 According to the statistics of Shandong Provincial Forestry Bureau, in 2006 the forestry pest in the province was moderately weighted with the annual area of ​​7,592,400 mu, a rate of 14.67%, down 8.17% from the same period of last year. Among them, the occurrence of diseases was 2.0383 million mu, down by 16.84% over the same period of the previous year; and the incidence of pests was 5.55 million mu, down by 4.52% over the same period of last year. Quarantine forestry pest Hyphantria cunea in the province formed a new proliferation, the epidemic increased, the province occurred 169600 acres, the occurrence of an area increased, more damaging; pine