近几年来我国森林病虫害发生严重,虫情呈上升趋势,1987年来势更猛。马尾松毛虫在南方诸省、油松毛虫在河北、山西和辽宁等地小发生。广东省松突圆蚧已蔓延到600万亩以上,严重威胁着我国南方大片松林。江苏省南京地区的松材线虫日趋势严,如不采取果断措 In recent years, the occurrence of forest pests and diseases in our country has been serious, and the insects are on the rise. In 1987, the situation was even more fierce. Masson pine caterpillars in the southern provinces, oil pine caterpillars occur in places such as Hebei, Shanxi and Liaoning. Pine ciliate scale has spread to more than 6 million mu in Guangdong Province, which seriously threatens the vast pine forests in southern China. Pine wood nematodes in Nanjing, Jiangsu Province, the increasingly stringent, if not take decisive measures