Fungus associados com a morte descendente do cacaueiro na Bahia
In 1971, a severe attack of die-back was reported in the cacao region of Bahia, a problem previously of minor importance. A survey carried out indicated that the disease was a more severe in the northern and central cacao regions as compared with the southern region. The principal symptoms observed were defoliation of the main branches, followed by a gradual drying of the lateral branches with the eventual death of the tree. Isolations made from the infected parts of different cacao cultivars indicated the presence of Botryodiplodia theobromae, Phoma sp., Phomopsis sp. and Colletotrichum gloeosporioides. Pathogenicity tests performed under field conditions showed that B. theobromae was the most pathogenic fungus followed by Phoma sp., Phomopsis sp. and C. gloeosporioides. None of the Fusarium sp. proved to be pathogenic
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1972
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| Subjects: | THEOBROMA CACAO, MARCHITEZ DESCENDENTE, ENFERMEDADES FUNGOSAS, DEFOLIACION, AISLAMIENTOS, PODER PATOGENO, INOCULACION, BOTRYODIPLODIA THEOBROMAE, PHOMA, PHOMOPSIS, COLLETOTRICHUM GLOEOSPORIOIDES, BAHIA, BRASIL, |
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| Summary: | In 1971, a severe attack of die-back was reported in the cacao region of Bahia, a problem previously of minor importance. A survey carried out indicated that the disease was a more severe in the northern and central cacao regions as compared with the southern region. The principal symptoms observed were defoliation of the main branches, followed by a gradual drying of the lateral branches with the eventual death of the tree. Isolations made from the infected parts of different cacao cultivars indicated the presence of Botryodiplodia theobromae, Phoma sp., Phomopsis sp. and Colletotrichum gloeosporioides. Pathogenicity tests performed under field conditions showed that B. theobromae was the most pathogenic fungus followed by Phoma sp., Phomopsis sp. and C. gloeosporioides. None of the Fusarium sp. proved to be pathogenic |
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