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松针褐斑病(Lecanosticta acicola)是湿地松(Pinus elliottii)、火炬松(P.taeda)和黑松(P.tunbergii)的重要病害,防治比较困难。从1982年开始采用对比法在重病林分中选择湿地松抗病优树122株,嫁接繁殖建立抗病湿地松采穗圃2.7ha,并用自然感染法和人工接种法对繁殖成的122个优树无性系进行抗病性测定和筛选,其中约有1/2的无性系表现具极高的抗病性。利用筛选出的抗病无性系建成湿地松无性系抗病种子园4ha。
Lecanosticta acicola is an important disease of Pinus elliottii, P. teda and P. tunbergii, and it is difficult to control. From 1982, the comparative method was used to select 122 elite trees for disease resistance in severely wooded stands. Grafting was used to establish the 2.7ha for anti-disease wetland harvesting. The natural and artificial inoculation methods were used to reproduce 122 excellent Tree clones for disease resistance determination and screening, of which about 1/2 clones show a very high resistance. Using the selected clones of resistant clones of Pinus elliottii seed germination garden 4ha.