Tree canker is a kind of most serious tree trunk disease which have a various of pathogens, a wide distribution of host and complex symptoms.
树木溃疡病是一类危害严重的枝干病害，病原种类多，寄主范围广，症状复杂。
The effects of S-921 strain (Streptomyces aureus) and its fermented broth on apple tree canker, Valsa mali, were tested by plating and free culture methods.
采用平板和离体培养法测定S-921菌株及其发酵液对苹果树腐烂病菌的作用。
A canker-root stopped in that big tree.
一只黄鹂鸟落在那棵大树上。
A canker-root stopped in that big tree.
一只黄鹂鸟落在那棵大树上。
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