Study on pathogenicity of Cytospora on Poplus and Salix in Xinjiang
[Objective]This project aims to clarify Cytospora on the pathogenicity of Poplus and Salix in Xinjiang.[Methods]In this study,the representative strains of 13 species of Cytospora identified previously were inoculated on Poplus alba and Salix alba by branch scalding in vitro and then the lesion area was meas-ured to compare the pathogenicity of different species of Cytospora on Poplus and Salix.[Results]Strains 2067-3(C.nivea)and 1579-1(C.chrysosperma)had the strongest pathogenicity on Poplus and Salix,with the highest lesion areas of 6,021.30 and 5,661.87 mm2,respectively.5 species of Cytospora isolated from Poplus sp.and Salix sp.were selected and inoculated on the detached branches of Poplus alba and Salix alba respectively.The lesion area of detached branches of Poplus alba was significantly larger than that of Salix al-ba.3 species of Cytospora isolated from Poplus sp.and 5 species of Cytospora isolated from Salix sp.could cause disease after cross infection,and there were significant differences in pathogenicity.Strains 2191-2(C.leucostoma)and 1010-1(C.salicacearum)were more pathogenic on poplar than those isolated from wil-low.[Conclusion]The 13 species of Cytospora from Poplus and Salix are pathogenic to Poplus and Salix,and the pathogenicity is significantly different.
Populus sp.Salix sp.Cytosporapathogenicitycross-contaminationgrowth laws
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