杉木是我国的主要用材树种之一。在毛主席关于“绿化祖国”教导指引下,我县广大贫下中农在“农业学大寨”运动中,综合治理山、水、田、林、路,以社队林场集体造林为主,大力绿化宜林荒山,杉木用材林基地的建设取得了可喜的成绩。但近两年来,在新城镇、沙河、狮子、城门等公社调查时,发现五种象鼻虫危害杉木幼林,其中尤以杉象虫危害最高。1975年4月据在新城镇东风大队林场(九江地区革委会试验林)内调查,发现有虫株数占总株数的90%以上,虫口密度1-20头/株不等。个别小区有虫株率高达100%,1棵杉木植株上最多达40头,严重地影响了杉木的 Chinese fir is one of the main timber species in China. Under the guidance of Chairman Mao’s guidance on “greening the motherland,” the vast majority of poor and middle peasants in our county, in the course of “learning from agriculture in Dazhai”, comprehensively managed the mountain, water, fields, forests and roads, Afforestation barren hills, fir timber base construction has made gratifying achievements. However, in the recent two years, in the investigation of communes such as the new towns, Shahe, Lions and Shing Mun, five kinds of weevil were found to be endangering the young Chinese fir plantations, of which Cunninghamia lanceolata was the most harmful. In 1975 April according to the new town of Dongfeng team farm (Jiujiang District Revolutionary Committee test forest) survey found that the number of insect pests accounted for more than 90% of the total number of plants, insect population density of 1-20 head / plant range. In individual communities, the rate of pests is as high as 100% and up to 40 on one fir plant, which seriously affects the growth of Chinese fir