A comparative resistance of several pine species to brown spot needle blight (caused by Lecanosticta acicola) and the origin of the disease
1988
Lin Zhaosheng | Liang Zichao (South China Agricultural Univ., Guangzhou (China). Dept. of Forestry)
A comparative resistance of several pine species to brown spot needle blight was studied by means of a field survey and some natural and artificial inoculations. Pinus massoniana appeared to be most resistant and P. elliottii most susceptible. P. taeda and P. caribaea belonged to intermediate types. This resistance could be differentiated by the number and type of the needle spots. At room temperature and at 5 C degrees the pathogen, Lecanosticta acicola, may survive for over 7 months in pieces of the infected leaves, which were always carried along with seeds. The cultural characteristics and the pathogenicity of the P. thunbergii isolates from Jiangxi Province were significantly different from those of P. elliottii isolates from Guangdong, Guangxi and Fujian Province. Presumably the pathogens of brown spot needle blight on P. elliottii were introduced from U.S.A. in 1970's.
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