EUCALYPTUS DIEBACK IN SOUTH-AFRICA ASSOCIATED WITH COLLETOTRICHUM-GLOEOSPORIOIDES

Citation
H. Smith et al., EUCALYPTUS DIEBACK IN SOUTH-AFRICA ASSOCIATED WITH COLLETOTRICHUM-GLOEOSPORIOIDES, South African journal of botany, 64(3), 1998, pp. 226-228
Citations number
18
Categorie Soggetti
Plant Sciences
ISSN journal
02546299
Volume
64
Issue
3
Year of publication
1998
Pages
226 - 228
Database
ISI
SICI code
0254-6299(1998)64:3<226:EDISAW>2.0.ZU;2-W
Abstract
Die-back of members of several Eucalyptus species, clones and hybrids was observed during a survey of forest plantations in the Mpumalanga a nd KwaZulu-Natal provinces, South Africa. This symptom was often assoc iated with agents of environmental stress such as drought, frost and h ot winds. Botryosphaeria dothidea, a well-known pathogen of Eucalyptus was frequently isolated from twigs showing die-back symptoms. in some cases, Colletotrichum gloeosporioides was isolated together with B. d othidea. Artificial inoculations of members of a Eucalyptus grandis cl one with both fungi resulted in lesion development. Although C. gloeos porioides was isolated much less frequently and only in the Mpumalanga Province, it gave rise to larger lesions after inoculation than did B . dothidea. This is the first report of die-back of Eucalyptus trees c aused by C. gloeosporioides in South Africa.