柑桔脚腐病又称烂蔸(火巴)、裙腐病。是柑桔树干的重要病害之一。染病树,干基树皮最初呈水浸状,浅褐色,渐渐变成深褐色,使根颈、根群腐烂,营养和水分运输受阻,出现黄叶秃枝,树势衰弱,产量下降,严重时全株枯死,造成严重经济损失。 1986—1989年的研究结果表明,该病是由疫霉属真菌引起,其中寄生疫霉为优势种。病菌从伤口和树体自身孔口侵入,潜伏期2—6天。当地温上升到15℃以上,即3月开始发病,4—7月为发病高峰,8月有1个低峰期,9月又有1次小高峰,10月病情开始下降,11—12月停止发病。病 Citrus foot rot, also known as rotten (fire), skirt rot. Citrus trunk is one of the important diseases. Infected trees, dry bark was initially flooded, light brown, gradually turned into dark brown, so that the root neck, root rot, nutrition and water transport blocked appear yellow leaf bald branches, tree weak, production decline, severe Strains die, causing serious economic losses. The results from 1986 to 1989 showed that the disease was caused by Phytophthora, and Phytophthora infestans was the dominant species. Pathogens invade the wounds and the body’s own orifice with an incubation period of 2-6 days. The local temperature rose above 15 ℃, that is, the onset in March, the peak incidence in April-July, August has a low peak in September there is a small peak in October, the condition began to decline, 11-12 months Stop the disease. disease