Studies on the Nutritional Disorders of Apple Bark. I.

On“Sohibyo”caused by manganese excess

Abstract

Some apple varieties growing in Aomori prefecture show severe bark disorder known as“Sohibyo”, which greatly reduces their production.“Sohibyo”, as here reported, resembles to the pimply and necrotic conditions of Internal bark necrosis which has been shown by BERG and his co-workers to be caused by excessive intake of manganese.