摘要
１９９０～１９９３年，从国内外收集的松材线虫９个株系和拟松材线虫５个株系，用皮接法接种３～６年生的松苗，测定线虫的致病性。结果表明，松材线虫的致病力明显高于拟松材线虫，其中国内的５个株系致病力最高。拟松材线虫通常不致病或致病力极低。在同一线虫种内，株系间致病力随寄主不同而不同。在寄主死亡速度上，寄主相同并死亡率相同或相近时，采自南京、广东马尾松病树上的线虫株系接种后，寄主平均死亡时间略短于其它株系。供试的８种松树，依死亡率及感病率，马尾松最为抗病，黑松、华山松最为感病。
From 1990～1993,the wirulence of 9 isolates of Bursaphelenchus xylophilusfrom
Japan(S-6),Canada(STJ,STW,BxBC)and China and 5 isolates of B.mucronatus
fromFrance(Bspfrance),Canada (Q1426),Norway(Norway)and China was tested.Each isolatewas
inoculated(1500～2000 nematodes/per seedling)on 3～6-yr-old seedlings of 8 pinespecies
through cutting the bark of the stem.As a result,the virulence of B.xylophilus iso-lates is
significantly higher than that of B.mucronatus wherever they are from.For each iso-late
inoculated,the graph of host mortality of 8 pine species is different even within the
samenematode species.The most virulent B.xylophilusn among them,are 5 isolates from
China.Isolates from Japan and Canada are moderate while isolates of B. mucronatus are less
virulentor avirulent.The result of disease development is related not only to mortality but to
meandeath speed(MDS).The MDS is different for different host pines inoculted with the
sameisolate and is different for the same pine species inoculted with different isolates as well.
Two isolates from China(both from Pinus massoniana in Nanjing and Shenzhen Cities)have
asomewhat higher MDS than other isolates.P.massoniana is the most resistant pine
afterinoculation while P.thunbergii and P.armandi are the most susceptible.The
relationshipamong host,nematode and other factors is also discussed.
出处
《林业科学研究》
CSCD
北大核心
1994年第4期381-385,共5页
Forest Research
基金
国家科委重点科技项目
国家自然科学基金
关键词
松材线虫
拟松材线虫
致病性
Bursaphelenchus xylophilus,B.mucronatus,pathogenicity
