1发病症状:大叶黄杨茎腐病最初在长势较弱植株上,自距地面10~15cm的个别茎部发生,周圈均腐烂至木质部,其后的几天上部枝叶失绿直至干枯,但是叶片始终在枝条上不会脱落。2病原菌:引起大叶黄杨茎腐病的病菌为半 Symptoms of disease: Stem rot of Buxus Orchard was initially on weaker plants, occurring from individual stems 10 cm to 15 cm above the ground, with rotting to the xylem in the circumference, and degeneration of the upper leaves to dryness after a few days, The leaves are always on the branches will not fall off. 2 pathogenic bacteria: cauliflower caused stalk rot bacteria half