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INVESTIGATION ON BROWN-SPOT NEEDLE BLIGHT OF PINES IN CHINA
Author(s): 
Pages: 11-18
Year: Issue:  2
Journal: Journal of Nanjing Forestry University(Natural Sciences Edition)

Keyword:  Brown-spot needle blight of pineLecanosticta acicolaPinus elliottiiPinus taedaPinus thunbergii;
Abstract: The brown-spot needle blight which destroyed hundreds has of young plantations of exotic pines has been found in southeast China since 1S78. The exotic pines, Pinus elliottii, P. taeda and P. thunbergii are severely damaged, P, palustris, P. echinata, P. caribaea and P. clause are also susceptible. The indigenous pines, P. massoniana and P. taiwanensis are highly resistent, while P. fenzeliana has never been infected. The causal fungus is identified as Lecanosticia acicola (Thum.) Syd., the conidial state of Scirrhia acicola (dearm) Siggers, Conidial stromata subepidermal becoming erumpent, dark brown, 100~275 75~225m in cross section; conidiophores pale brown, cylindrical,15~25 3m conidia pale brown to olive brown, cylindrical, straight or curved, l~6 mostly 3 septate, 24.5~5l.0 x3.4~6.3 m with a rounded apex and truncate base. The asco state of the fungus has never been observed in China. The disease is found in Fujian, Jiangxi, Zhejiang, Jiangsu, Anhui, Guangdong and Guangxi provinces but it is most common and severe in Fujian.
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