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Etude ecologique de la cacaoyere en relation avec la sensibilité envers le Phytophthora palmivora et la teneur en eau des tissus du péricarpe des cabosses

by Jones, E; Quesnel, V.C; Chalmers, W.S; Fordham, R; Iton, E.F. eds; Tarjot, M; Murray, D.B; Cocoa Research Institute, St. Augustine (Trinidad y Tobago); 4. International Cocoa Research Conference St. Augustine (Trinidad y Tobago) 8-18 Ene 1972.
Publisher: St. Augustine (Trinidad y Tobago) 1972Description: p. 412-423.Other Title: Proceedings.Subject(s): THEOBROMA CACAO | PHYTOPHTHORA PALMIVORA | PODREDUMBRES | ENFERMEDADES FUNGOSAS | FACTORES AMBIENTALES | CONTENIDO DE AGUA | LLUVIA | TEMPERATURA | HUMEDAD RELATIVA | THEOBROMA CACAO | PHYTOPHTHORA PALMIVORA | ROTS | FUNGAL DISEASES | ENVIRONMENTAL FACTORS | WATER CONTENT | RAIN | TEMPERATURE | RELATIVE HUMIDITY | THEOBROMA CACAO | PHYTOPHTHORA PALMIVORA | POURRITURE | MALADIE FONGIQUE | FACTEUR DU MILIEU | TENEUR EN HUMIDITE | PLUIE | TEMPERATURE | HUMIDITE RELATIVESummary: The effect of environmental factors (rainfall, temperature and relative humidity) on the response of pods to Phytophthora palmivora has been studied. The idea is suggested of "pouvoir tampon" of a cacao tree which is its ability to buffer variations in relative humidity. This "pouvoir tampon" bears a direct relation to the rotting of the pod. The effect of environmental factors on the pod and the fungus is: - rainfall has no direct effect on the pod but is important for the aberation and spread of zoospores. - Temperature is also without effect on the pod but a drop in temperature has a beneficial effect on the aberations of the zoospores. - Relative humidity close to saturation increases the susceptibility of pods and favours the fungus. - The effect of light is unknown
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The effect of environmental factors (rainfall, temperature and relative humidity) on the response of pods to Phytophthora palmivora has been studied. The idea is suggested of "pouvoir tampon" of a cacao tree which is its ability to buffer variations in relative humidity. This "pouvoir tampon" bears a direct relation to the rotting of the pod. The effect of environmental factors on the pod and the fungus is: - rainfall has no direct effect on the pod but is important for the aberation and spread of zoospores. - Temperature is also without effect on the pod but a drop in temperature has a beneficial effect on the aberations of the zoospores. - Relative humidity close to saturation increases the susceptibility of pods and favours the fungus. - The effect of light is unknown

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