A IDENTIFICATION OF PHYSIOLOgICAI RACES OF THE BIACK SHANK PATHOGEN (PHYTOPHTHORA PARASITICA VAR.NICOTIANAE) IN SHANDONG PROVICE
Zhu Xian-Chao, Guo Zhen-Ye, Liu Bao-an
Acta Phytopathologica Sinica . 1987, (2): 90 -95 . 

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