摘要
病菌主要以分生孢子在植株病残体、种子及土壤中越冬 ,成为初侵染源 ,在常温 2 5℃饱和湿度条件下 ,48h左右病菌就能通过气孔侵入植株叶片组织 ,在一个生长季节可多次侵染 ,并可借助雨水、风传播蔓延 ,一般病害于 6～ 8月为发病期。防治技术主要是培育壮苗、种苗消毒、土壤消毒和药剂喷药等。
The pathogen which leads to the spot blight of Gentiana live through the winter in the soil, dead body and seeds of the Gentiana mainly in the form of conidiophores. This pathogen becomes original source of infection and it can get into the leave tissue of Gentiana through the stomate at average temperature in 48 hours /The pathogen can infect several times during the one growing season and it can spread with the help of rain and wind. The disease occurs from June till August. The controlling technique of this disease is mainly by means of cultivating strong seedlings, sterilizing seeds, seedling soil and spraying the pesticide to prevent the pathogen from spreading.
关键词
龙胆草
斑枯病
发病规律
防治技术
Gentiana
spot blight
developing rule
controlling technique
