クワから分離した炭そ病菌 Colletotrichum dematium, C. acutatum, Glomerella cingulata とその病原性

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Among 68 isolates originating from diseased mulberry leaves which were collected from 15 prefectures of Japan, 56 were anthracnose fungi belonging to the genus Colletotrichum. They were divided into 3 groups based on the shape and size of their conidia. The first with falcate conidia consists of 35 isolates and was identified as C. dematium. The second includes 11 isolates and was characterized by cylindric conidia. Among them 8 produced mature perithecia on PDA. The second group was identified as Glomerella cingulata=C. gloeosporioides. The remaining 10 isolates produced fusiform conidia and were identified as C. acutatum. One of 2 anthracnose fungi hitherto described on Morus, C. morifolium Hara was proposed to be a synonym for C. dematium (Persoon : Fries) Grove due to the morphological characteristics of the conidia. However, C. morina which is distinct from the above 3 anthracnose fungi was not isolated. In the first inoculation series using mycelial colony of every isolates, the C. dematium group and C. acutatum group showed strong pathogenicity on the intact and punctured mulberry leaves. However, in the second series using conidia of selected isolates of 3 fungi, C. dematium and G. cingulata produced big lesions, and C. acutatum showed very weak pathogenicity. In the field, C. dematium forms typical lesions on mulberry leaves, but no clear lesions caused by G. cingulata and C. acutatum have been observed. From these, it is concluded that the fungi other than C. dematium seem to be minor and development of their lesions depends on the condition of the host.
日本植物病理学会の論文
1995-02-25

クワから分離した炭そ病菌 Colletotrichum dematium, C. acutatum, Glomerella cingulata とその病原性

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