由Phytophthora parasitica导致的柑桔干腐病和根腐病,是使佛罗里达柑桔生产者大感头痛的问题。在柑桔苗圃和果园控制这种病原体,是生产者对所有病虫害管理计划中极其重要的一部分。奥兰多和斯塔特柑桔产区1981年春、夏的气候温暖、潮湿,于腐病和根腐病在新定植和5、6龄果园流行,生产者对有效杀真菌剂出现的期望愈趋迫切。柑桔干腐病控制一直是以预防为主。过去,苗圃的砧木地常用熏蒸的办法,除去P.parasitica。 Citrus dry rot and root rot caused by Phytophthora parasitica are problems that make Florida citrus producers have a big headache. Controlling this pathogen in citrus nurseries and orchards is an extremely important part of the producer’s plan for all pest management. Orlando and Stant citrus growing areas In the spring of 1981, the climate in summer was warm and humid. When rots and root rots were prevalent in newly planted and orchards in the 5th and 6th instar, producers’ expectations of effective fungicides became more and more urgent . Control of citrus dry rot has always been based on prevention. In the past, nursery rootstocks commonly used fumigation method, except P.parasitica.