A sudden dieback of cocoa caused by Botryodiplodia theobromae
In early 1982 and mid-1985, a sudden dieback was observed on eight-year old and four-year old polyclonal cocoa trees respectively in an inland estate in Selangor following a period of intense drought. Similar dieback symptoms were observed on budgrafted polybags which were cut back to severely during the dry months. Isolations from disease tissues consistently yielded the fungus Botryodiplodia theobromae. The fungus was pathogenic on budgrafted seedlings when the seedlings were stressed a few days without watering prior to wound inoculation. The role of prevailing environmental factors on disease incidence and control measures are also discussed
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| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1987
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| Subjects: | ENFERMEDADES FUNGOSAS, THEOBROMA CACAO, BOTRYODIPLODIA THEOBROMAE, MARCHITEZ DESCENDENTE, DAÑOS, FACTORES AMBIENTALES, STRESS, CONTROL DE ENFERMEDADES, ETIOLOGIA, MALASIA, |
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| Summary: | In early 1982 and mid-1985, a sudden dieback was observed on eight-year old and four-year old polyclonal cocoa trees respectively in an inland estate in Selangor following a period of intense drought. Similar dieback symptoms were observed on budgrafted polybags which were cut back to severely during the dry months. Isolations from disease tissues consistently yielded the fungus Botryodiplodia theobromae. The fungus was pathogenic on budgrafted seedlings when the seedlings were stressed a few days without watering prior to wound inoculation. The role of prevailing environmental factors on disease incidence and control measures are also discussed |
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