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一、绪言 Microcylus ulei所致的橡胶南美叶疫病是热带美洲最严重的橡胶病害,发病地区从墨西哥到巴西的圣保罗州。在世界橡胶树最集中的东方还没有报道过南美叶疫病,这或许归功于检疫机构采取有效措施防止繁殖材料直接引入亚洲国家,因为东方国家的条件是非常适宜于发生此病的。一般认为南美叶疫病是扩大天然橡胶生产的主要限制因素,在本世纪二十年代初期,此病迫使苏里南
I. INTRODUCTION The rubber caused by Microcylus ulei The South American leaf blight is the most serious rubber disease in the tropical Americas, with onset from Mexico to Sao Paulo state in Brazil. It is perhaps due to the quarantine authorities that taking effective measures to prevent the direct introduction of reproductive material into Asian countries has not yet been reported in the easternmost rubber tree in the world because the conditions in the Eastern countries are very suitable for the onset of the disease. It is generally accepted that leaf blight in South America is a major limiting factor in expanding natural rubber production. In the early 1920s, this disease forced Suriname