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Trichoderma stromaticum sp. nov., a parasite of the cacao witches broom pathogen

Published online by Cambridge University Press:  01 June 2000

G. J. SAMUELS
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Systematic Botany and Mycology Laboratory, Room 304, B-011A, BARC-W, Beltsville, MD 20705, USA
R. PARDO-SCHULTHEISS
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Systematic Botany and Mycology Laboratory, Room 304, B-011A, BARC-W, Beltsville, MD 20705, USA
K. P. HEBBAR
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Biocontrol of Plant Diseases Laboratory, B-011A, BARC-W, Beltsville, MD 20705, USA
R. D. LUMSDEN
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Biocontrol of Plant Diseases Laboratory, B-011A, BARC-W, Beltsville, MD 20705, USA
C. N. BASTOS
Affiliation:
CEPLAC/SUPOR, Rodovia Augusto Montenegro, Km 7, Belem-Para, CEP 66635-110, Brazil
J. C. COSTA
Affiliation:
CEPLAC/CEPEC – Secão de Fitopatologia, C. Postal 7, Itabuna, Bahia, CEP 45600-000, Brazil. E-mail: gary@fungi.ars-grin.gov
J. L. BEZERRA
Affiliation:
CEPLAC/CEPEC – Secão de Fitopatologia, C. Postal 7, Itabuna, Bahia, CEP 45600-000, Brazil. E-mail: gary@fungi.ars-grin.gov
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Abstract

A new species, Trichoderma stromaticum, was isolated from ‘witches' broom’ of cacao (Theobroma cacao) in Brazil caused by Crinipellis perniciosa. The Trichoderma was reported earlier as T. viride and T. polysporum. Trichoderma stromaticum reduced new inoculum through the suppression of basidioma formation. It is characterised by having conidia that slowly become yellow-green in agar culture and by stout, ‘Pachybasium-like’, phialides formed on the surface of stromatic structures. The closest relations of T. stromaticum are T. harzianum and T. virens.

Type
Research Article
Copyright
© The British Mycological Society 2000

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