Abstract:

150 persimmon orchards distributed in suburbs of Guilin, Pingle County and Gongcheng County in Guangxi province were investigated for more than 3 years, 7 soil samples from 6 orchards in suburbs of Guilin, Pingle County and Gongcheng County and 14 leaf samples from 4 orchards in Pingle County and Gongcheng County were analyzed and boron was applied as fertilizer in Gongcheng County. The results showed that lack of boron was the main cause of top rot disease; reducing basic fertilizer, improper ringbark, lack of controlling on other plant disease were correlated with disease severity, Gongcheng Water Persimmon, persimmon planting in flat land and high temperature in late September is vulnerable to top rot. Disease severity has no relationship with root stock and the age of persimmon tree.