马尾松是我县主要用材树种。历年来松毛虫危害十分严重,每年受害面积达几十万亩。在县委领导重视下,从一九六三年以来,十一年中有六年是飞机除虫,五年人工除虫,从未间断。但来用飞机喷药、人工捕捉、药械喷杀等方法投资大、用工多,特别是连续单一使用 Masson pine is my main timber species. The damage caused by the caterpillars over the years is very serious, with an area of ​​hundreds of thousands of mu each year. Under the leadership of the county Party committee, since 1963, six years in eleven years have been the pest-killing of aircraft and the artificial insemination of five years has never stopped. However, the use of aircraft spraying, manual capture, spraying and other methods of drug injection large, more labor, especially the continuous single use