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油桐是我国主要经济树种,四川桐籽年产量1.5亿公斤,居全国之冠。自1957年四川桐区发生油桐根腐病以来,连年导致桐林大片死亡,产量急剧下降。1978—1986年发病桐林24.6万亩,死亡桐树49.25万株,直接损失82.24万元,累计损失657.98万元。三十年来,由于病因不明,生产上难以对症防治,并常与油桐枯萎病混淆,以致扩大蔓延至今。1982—1987年我们对其发病原因进行了系统试验研
Tung tree is China’s major economic tree species, Sichuan Tong seed annual output of 150 million kilograms, ranking highest in the country. Since the occurrence of turmeric root rot in Tong District, Sichuan Province in 1957, many large-scale deaths have occurred in Tonglin County, causing a sharp drop in output. In 1978-1986, there were 246,000 mu of Tonglin disease and 492,500 dead tung trees, with a direct loss of 822,400 yuan and a total loss of 6,579,800 yuan. In the past 30 years, due to the unknown etiology, it is difficult to prevent and control symptomatic diseases in production and is often confused with Fusarium wilt. Therefore, the epidemic has spread so far. 1982-1987, we conducted a systematic study of its causes