对进口湿地松、火炬松种子抽样检验没有发现种子带菌,也未发现其中夹杂有针叶碎片。松针褐斑病菌分生孢子在湿地松或火炬松种子表面存活期不到34d。人工喷雾接种可使出土一个月的幼苗感病,但将病针叶随种子一起播入土中不能引起幼苗发病,病菌随针叶在土壤中存活期不到36d。因此认为种子和混杂在种子中的有病针叶碎片不能传播松针褐斑病。 On the import of Pinus elliottii, loblolly pine seed sampling test found no seed carriers, but also did not find inclusion of coniferous fragments. Conidiophora spores conidia in slash pine or lobular seed surface survival less than 34d. Artificial spray inoculation can make a month of young seedlings susceptible, but the sick needle with the seeds sowing into the soil can not cause seedling disease, the survival of the bacteria with the needles in the soil less than 36d. Therefore, it is considered that the seed and the sick coniferous fragments mixed in the seed can not transmit pine needle brown spot.