济南百亩园园林绿化有限公司 

Twig dieback type disease rapidly after dead, no obvious symptoms of ulcer. Pathogen for the family of imperfect mushrooms having multiple fungal subphylum. The incidence of 3-4 in the can, 5-6 months for the period after July September, ease, and stop after.

发病与气候、树体长势、土壤条件和栽培措施有关。温度为10-15℃、相对湿度为60%-80%有利于病害发生。该类病菌只能为害长势衰弱或濒临死亡的树皮组织。春季干旱、夏季易发日灼、冬季易受冻害均易促发此病。新移植的幼树灌水不及时或受到干旱时发病尤为严重。病斑多出现在苗木的西南面。苗木假植时间过长，移栽时根系受伤严重都有可诱发此病。

With the onset of climate, soil, tree growth conditions and cultivation measures. The temperature of 10-15 DEG C, relative humidity of 60%-80% is conducive to disease. The bacteria can damage the growing weakness or dying bark tissue. The spring drought, Xia Jiyi sent a sunburn, vulnerable to cold in winter are easy to trigger the disease. Newly transplanted trees irrigation is not timely or by the drought is more serious disease. The lesion occurred in the southwest of seedlings. Seedling transplanting time is too long, seriously injured when transplanting roots are induced disease.