病菌群体对所测定的30个抗瘟基因均表现出毒性，毒力频率为17。
The strains population was virulent to all 30 rice blast monogenic lines, virulence frequency(VF)ranged from 17.
在实验室条件下，采用菌丝生长速率测定法，测定了1.5 %卡松水剂对苹果炭疽病菌的毒力。
Under the condition of laboratory, the inhibitive activity of 1.5% Kathan to the pathogen of apple anthracnose, Colletotrichum gloeosprioides, was studied by means of mycelium growth rate method.
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