论文部分内容阅读
1985年4月,笔者在海南岛琼海县上埇林场进行病害调查,发现该场桉树苗木灰霉病发生较严重,发病株率一般在10—15％,严重的地方可达30％,以柳桉(Eucalypt-us saligna)发病最严重,赤桉(E.cam-aldulensis),窿缘桉(E.exerta)等苗木发生较少。感病苗木后期一般呈现出“猝倒”型死亡。有关桉苗灰霉病的发生情况,据悉,广西东门林场去年4月桉苗也严重发生此病。此外,云南也反映桉苗有灰霉病发生。国外在澳大利亚、日本、巴西、肯尼亚等均有分布,是桉树苗期普遍发生的一种病害。
In April 1985, the author conducted a survey on the disease in Shangyu Forest Farm, Qionghai County, Hainan Island and found that there was more serious gray mold disease in the eucalyptus seedlings. The incidence rate of the disease was generally 10-15% and in severe places up to 30% Eucalyptus saligna was the most serious one. E.cam-aldulensis and E.exerta occurred less frequently. Susceptible late seedlings generally show a “catapulted” type of death. Regarding the occurrence of gray mold disease of eucalyptus seedlings, it is reported that Eucalyptus Seedlings also suffered from the disease in Dongmen Forest Farm in April last year. In addition, Yunnan also reflects the emergence of gray mold eucalyptus. Abroad in Australia, Japan, Brazil, Kenya, etc. are distributed, is a common occurrence of eucalyptus seedling diseases.