三種土肉桂葉部新病害

Three New Foliage Diseases of Cinnamomum osmophloeum

張東柱(Tun-Tschu Chang)

《林業試驗所研究報告季刊》 8卷1期 (1993/03) Pp. 51-59

https://doi.org/10.7075/BTFRI.199303.0051

摘要

土肉桂(Cinnamomum osmophloeum)常發現有葉斑病之病徵。罹病葉片之葉綠或葉中等部位發生褐色小斑點。有些小病斑逐漸擴大或互相癒合成近圓形至不規則型的大型病斑，但有些小病斑則發展緩慢。經切片觀察及組識分離，發現有三種病原菌，分別是Collectotrichum gloeosporioides，Phoma multirostrata與Diaporthe sp. 。將純培養病原菌的孢子接種到土肉桂的葉片，可產生與自然界相同的病徵。自人工接種發病之病葉均可分離到與接種相同的病原菌。上述三種土肉桂葉部病害在世界其他地區尚未被報導。

關鍵字

土肉桂 ； 炭疸病 ； 葉斑病 ； Collectotrichum gloeosporioides ； Phoma multirostrata ； Diaporthe sp.

並列摘要

Occurrence of foliage diseases was usually observed on Cinnamomum osmophloeum. At beginning, small brown leaf spots appeared on leaves or the margin of leaves. Some small brown leaf spots becoming larger or growing together became large circular or irregular leaf spots, while others did not develope too much. By microscopy observation and tissue isolation, three fungal pathogens were found and isolated. They are Collectotrichum gloeosporioides, Phoma multirostrata and Diaporthe sp. The disease was reproduced by inoculation of the cuttings with spores of each pathogen. The individual fungi were also isolated from the inoculated plants to complete the pathogenicity tests. C. gloeosporioides, P. multirostrata and Diaporthe sp. on C. osmophloeum were first documented in the world.

並列關鍵字

Cinnamomum osmophloeum ； anthracnose ； leaf spot ； Collectotrichum gloeosporioides ； Phoma multirostrata ； Diaporthe sp.