摘要
目的：了解三七根腐病的发生与环境条件的关系，为综合防治积累资料。方法：采用田间小区定点定期观察与分析进行研究。结果：文山地区三七根腐病普遍发生，每年有两次发病高峰期，第１次出现于３～４月，第２次出现于７～８月，气温２０℃，相对湿度大于９５％有利于病害发生和蔓延。透光率过大（＞３０％），发病严重。连作地较轮作地和新栽地发病重，且连作年限越长病情越重。田间管理水平也影响病害的发生和发展。结论：三七根腐病的发生、发展与环境条件密切相关。
Objective:To probe into the relationship between root rot on Panax notoginseng and its environmental coditions for integrate control of the desease.Method:Field observation and analysis on the planting plots were conducted regularly.Results:Root rot on P.notoginseng occurs extensively in Wenshan Prefecture,with two peaks of incidence per year.The first peak appears in March April;and the second July August.Air temperatures around 20℃ and relative humidities of higher than 95% are farorable for the disease to occur and spread.The root rot is severe when the light transmitting rate in the shade shed is too high(>30%).The disease is severer in land of continuous cropping than in land of rotational cropping and land of new cropping.The severity of the rot increases with the years of continuous cropping.The art of field management also influences the occurring and spreading of the disease.Conclusion:The occurring and spreading of P.notoginseng root rot are closely related to its environmental conditions.
出处
《中国中药杂志》
CAS
CSCD
北大核心
1998年第12期714-716,共3页
China Journal of Chinese Materia Medica
基金
国家自然科学基金
云南省应用基础研究基金
关键词
三七
根腐病
环境条件
荫棚透光率
种植制度
Panax notoginseng
root rot
environmental conditions
light transmitting rate in the shade shed
cultural system
field management
