Studies on the Mycoflora of Pinus thunbergii Infected by Bursaphelenchus xylophilus

44 isolates of fungi were isolated from the xylem of the Pinus thunbergii samples(healthy stem,weak stem and withered stem)infected by the pine wilt disease caused by pine wood nematode,Bursaphelenchus xylophilus,from infected trees at Zhoushan and Pinghu of Zhejiang Province in China,and these isolates were identified as:Trichoderma spp.,Penicillium spp.,Pestalotia spp.These identified isolates took 70.62% of total isolates of the fungi.Among the 12 isolates unidentified,one sporiferous fungus was found,the other 11 isolates were nonsporiferous.Trichoderma spp.was the dominant fungus in P.thunbergii,the total rate was 53.34%,followed by Penicillium spp.,18.89%.