邵阳地区柑桔根腐病流行规律及防治研究

对湖南邵阳地柑桔根腐病的流行规律及防治进行了研究。结果表明：该病病菌主要在病株根系内越冬，越夏；感病植株一年四季均可表现黄叶，落叶或树势衰弱症状；５月下旬至７月中旬，９月下旬至１２月下旬为黄化症状发生盛期，不良的气候，栽培，土壤条件有利于病害发生；在防治上应贯彻以农业防治为基础，结合病株施药的综合防治原则。

RESEARCH ON EPIDEMIC AND CONTROL OF CITRUS ROOT ROT IN SHAOYANG

The epidemic law and control of citrus root rot disease in the district of Shaoyang,Hunan were studied.The results showed that its pathogen mainly wintered and summered in the roots of the disease plants.They may show the symptons of leaf yellow,fallen,growth weak in all the seasons of a year.The diseace takes place from the last ten days of May to the second ten days of July and from the last ten days of September to the second ten days of December.As for control measures,we should implement agricultural control as the basis and pay close attention to chemical control.