佛肚竹枯萎病病原、发病规律及防治

Identification of the Pathogen, Outbreak Regularity and Control Method of Wilt Disease of Bambusa ventricosa

佛肚竹枯萎病病原鉴定为:有性阶段为鲜红丛赤壳菌NectriaditissimaTul ,无性阶段为半裸镰孢霉FusariumsemitectumBerk ＆Rav 病菌平时在土壤中营腐生生活,在佛肚竹遭受冻害后,借风雨传播,从竹秆基竹节伤口侵入 病害于2月下旬至3月初开始发病,3月上旬～4月中旬霉雨季节为发病高峰期,5月中下旬停止蔓延

The symptom, identification, inoculation, cultivated characteristics of the pathogen and outbreak regularity of the wilt disease of Bambusa ventricosa were well studied. The species was identified as Nectria ditissima Tul. at sexual phase, and as Fusarium semitectum Berk.& Rav. at anamorphic state. The results of experiments showed that the pathogen of wilt disease was overwintering at soil, and disseminated by winds and rains to infect the wounded stem base of Bambusa ventricosa. The primary infection occurred from the last ten days of February or the first days of March. The peak infection occurred from the first ten days of March to the second ten days of April during early summer rains.The stop infection occurred from the second ten days or the last ten days of May.The freeze injury was important factor to induce infection of the wilt disease.