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橡胶树白粉病(Oidium heveae stei-nm)是橡胶树的主要病害之一.本病自1918年阿伦斯在印尼爪哇发现以来.目前已遍及世界各植胶区.我国橡胶垦区1951年在海南省最早发现此病.卅年来,在海南、广东、广西、云南、福建等省(区)均有发生流行.白粉病为害橡胶树嫩叶、嫩梢和花序.严重时引起落叶、落花,导致胶乳减产,胶果失收.据华南热作研究院观察:病情2级,减产干胶1.9%;3级减产9%;4级
Rubber tree powdery mildew (Oidium heveae stei-nm) is one of the major diseases of the rubber tree.The disease has been found in Indonesia and Java since Ahrens in 1918. Nowadays, it has spread all over the world.Our rubber reclamation area was the earliest in Hainan Province in 1951 In the past few years, epidemics have been reported in Hainan, Guangdong, Guangxi, Yunnan and Fujian provinces, etc. Powdery mildew causes young leaves, tender shoots and inflorescences of rubber trees, causing deciduous and falling flowers in severe cases, resulting in the decrease of latex production, According to the South China Research Institute of thermal observation: Condition 2, 1.9% reduction in dry glue; 3 to 9% reduction; 4