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大叶相思(Acacia aurilformis A.Cunn etBenth.)是一种适应性强、生长迅速、具多种用途的优良速生造林树种。我国自60年代从国外引种以来,生长表现甚好,深受各地群众欢迎。目前,福建、广西南部等地也开始大量引种栽培。白粉病(Oidium sp.)是大叶相思的重要病害之一,在华南各种植区普遍发生,以苗期,特别是幼苗期发病严重,发病株率一般为40-60%,严重时高达90-100%,病情指数可达50-75。感病幼苗轻者叶片退绿,卷曲或黄化,生长受到影响,延长苗木出圃时间;
Acacia aurilformis A.Cunn et Benth. Is a good adaptability, rapid growth, with a variety of purposes excellent fast-growing tree species. Since our introduction from abroad in the 1960s, our growth has been very good and has been well received by all localities. At present, Fujian, Guangxi and other places also started a large number of introduction and cultivation. Powdery mildew (Oidium sp.) Is one of the most important diseases of Acacia macroscopia. It occurs frequently in all kinds of plantations in South China. It has a serious incidence in seedling stage, especially in seedling stage. The incidence of plant disease is generally 40-60%, and in severe cases it is as high as 90 -100%, disease index up to 50-75. Slightly infected leaves of young people green, curly or yellow, the growth affected, to extend nursery stock nursery time;