梅州市是全国最大的金柚生产基地，柚类种植面积４万hm２。褐腐疫霉病是本市柚类主要病害之一。此病又称褐腐病、褐色腐败病，发生普遍，造成大量落果，一般损失１０％以上。１症状褐腐疫霉病可发生在柚果表面的任何部位，但果实成熟中期，多发生在脐部。发病初期，果皮上出现 Meizhou City is the country’s largest grapefruit production base, pomelo planting area of ​​40,000 hm2. Phytophthora capsici is one of the main diseases of pomelo in this city. The disease, also known as brown rot, brown rot disease, occurs generally, resulting in a large number of fruit drop, the general loss of more than 10%. 1 Symptoms Phytophthora capsici can occur anywhere on the surface of the pomelo fruit, but in the middle of the fruit maturity, occurs in the umbilicus. Early onset, appears on the skin