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Black canker and leaf spot of Salix in New Zealand caused by Glomerella miyabeana (Colletotrichum gloeosporioides)
Author(s) -
Spiers A. G.,
Hopcroft D. H.
Publication year - 1993
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1993.tb00810.x
Subject(s) - colletotrichum gloeosporioides , glomerella cingulata , canker , biology , conidium , colletotrichum , cultivar , botany , black spot , inoculation , horticulture
Two new diseases have been observed attacking willows in New Zealand. In the first instance black stem cankers formed on S. matsudana × S. alba × S. alba cultivars, eventually killing them. In the second instance foliage of S. gooddingii and S. amygdaloides was attacked and premature defoliation occurred. Morphological studies and host inoculations established that Glomerella miyabeana ( Colletotrichum gloeosporioides anamorph) was the causal agent of both diseases. Foliage of cultivars exhibiting stem cankering was not attacked nor were stems of cultivars with foliar lesions. Electron microscope studies showed that conidia of Colletotrichum gloeosporioides formed phialidically within acervuli and comdial dimensions varied significantly with host.