apple valsa canker

常見(jiàn)例句

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.
采用平板和離體培養(yǎng)法測(cè)定S-921菌株及其發(fā)酵液對(duì)蘋(píng)果樹(shù)腐爛病菌的作用。
It was revealed in an extensive survey that the occurrence of apple Valsa canker (Valsa ceratosperma) is correlated negatively with potassium content in bark.
矯治試驗(yàn)結(jié)果表明，春季增施鉀肥，可提高樹(shù)皮含鉀量并減輕腐爛病發(fā)生程度。
But recently, the apple tree valsa canker caused by Cytospora spp occurred seriously and prevalently, which had became a threaten that held back the apple industry development.
然而，近年來(lái)蘋(píng)果樹(shù)腐爛病的普遍嚴(yán)重發(fā)生，已經(jīng)對(duì)陜西蘋(píng)果產(chǎn)業(yè)的順利發(fā)展構(gòu)成了嚴(yán)重的威脅。