Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon
Black pod rot, caused by Phytophthora megakarya, is the main cause of cocoa harvest losses in Cameroon. Field experiments were carried out over two successive years in two smallholders¿ plots of cocoa trees, in order to assess the impact of diseased pod removal (phytosanitary pod removal) on disease progress, total production and final harvest. The generalized linear mixed model proved to be the most appropriate for comparing the two treatments (without and with pod removal) set up in a randomized complete block design. Removing diseased pods helped to reduce the black pod rate by 22% and 31% in the two sites in the first year, and by 9% and 11% in the second year, compared to a plot in which no preventive control measures were taken. The rate of cherelle (very young pod) appearance was also higher when pod removal was carried out. Total production was higher in the plots with pod removal, but the difference between the two treatments was not significant. This study allowed an evaluation of the respective roles of primary and secondary inoculum in the spread of the disease. The cultural practice of phytosanitary pod removal was found to be a potentially efficient control method. However, it would need to be associated with other control methods to establish an integrated management system for cocoa farmers.
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Subjects: | H20 - Maladies des plantes, Theobroma cacao, maladie des plantes, Phytophthora, pourriture, contrôle de maladies, suppression de fruits, épidémiologie, http://aims.fao.org/aos/agrovoc/c_7713, http://aims.fao.org/aos/agrovoc/c_5962, http://aims.fao.org/aos/agrovoc/c_5844, http://aims.fao.org/aos/agrovoc/c_6667, http://aims.fao.org/aos/agrovoc/c_2327, http://aims.fao.org/aos/agrovoc/c_32701, http://aims.fao.org/aos/agrovoc/c_2615, |
Online Access: | http://agritrop.cirad.fr/520158/ http://agritrop.cirad.fr/520158/1/520158.pdf |
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dig-cirad-fr-5201582024-01-28T12:29:52Z http://agritrop.cirad.fr/520158/ http://agritrop.cirad.fr/520158/ Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon. Ndoumbé Michel, Cilas Christian, Nyemb E., Nyassé Salomon, Bieysse Daniel, Flori Albert, Sache Ivan. 2004. Crop Protection, 23 (5) : 415-424.https://doi.org/10.1016/j.cropro.2003.09.010 <https://doi.org/10.1016/j.cropro.2003.09.010> Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon Ndoumbé, Michel Cilas, Christian Nyemb, E. Nyassé, Salomon Bieysse, Daniel Flori, Albert Sache, Ivan eng 2004 Crop Protection H20 - Maladies des plantes Theobroma cacao maladie des plantes Phytophthora pourriture contrôle de maladies suppression de fruits épidémiologie http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_6667 http://aims.fao.org/aos/agrovoc/c_2327 http://aims.fao.org/aos/agrovoc/c_32701 http://aims.fao.org/aos/agrovoc/c_2615 Black pod rot, caused by Phytophthora megakarya, is the main cause of cocoa harvest losses in Cameroon. Field experiments were carried out over two successive years in two smallholders¿ plots of cocoa trees, in order to assess the impact of diseased pod removal (phytosanitary pod removal) on disease progress, total production and final harvest. The generalized linear mixed model proved to be the most appropriate for comparing the two treatments (without and with pod removal) set up in a randomized complete block design. Removing diseased pods helped to reduce the black pod rate by 22% and 31% in the two sites in the first year, and by 9% and 11% in the second year, compared to a plot in which no preventive control measures were taken. The rate of cherelle (very young pod) appearance was also higher when pod removal was carried out. Total production was higher in the plots with pod removal, but the difference between the two treatments was not significant. This study allowed an evaluation of the respective roles of primary and secondary inoculum in the spread of the disease. The cultural practice of phytosanitary pod removal was found to be a potentially efficient control method. However, it would need to be associated with other control methods to establish an integrated management system for cocoa farmers. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/520158/1/520158.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.cropro.2003.09.010 10.1016/j.cropro.2003.09.010 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=181369 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cropro.2003.09.010 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.cropro.2003.09.010 |
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H20 - Maladies des plantes Theobroma cacao maladie des plantes Phytophthora pourriture contrôle de maladies suppression de fruits épidémiologie http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_6667 http://aims.fao.org/aos/agrovoc/c_2327 http://aims.fao.org/aos/agrovoc/c_32701 http://aims.fao.org/aos/agrovoc/c_2615 H20 - Maladies des plantes Theobroma cacao maladie des plantes Phytophthora pourriture contrôle de maladies suppression de fruits épidémiologie http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_6667 http://aims.fao.org/aos/agrovoc/c_2327 http://aims.fao.org/aos/agrovoc/c_32701 http://aims.fao.org/aos/agrovoc/c_2615 |
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H20 - Maladies des plantes Theobroma cacao maladie des plantes Phytophthora pourriture contrôle de maladies suppression de fruits épidémiologie http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_6667 http://aims.fao.org/aos/agrovoc/c_2327 http://aims.fao.org/aos/agrovoc/c_32701 http://aims.fao.org/aos/agrovoc/c_2615 H20 - Maladies des plantes Theobroma cacao maladie des plantes Phytophthora pourriture contrôle de maladies suppression de fruits épidémiologie http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_6667 http://aims.fao.org/aos/agrovoc/c_2327 http://aims.fao.org/aos/agrovoc/c_32701 http://aims.fao.org/aos/agrovoc/c_2615 Ndoumbé, Michel Cilas, Christian Nyemb, E. Nyassé, Salomon Bieysse, Daniel Flori, Albert Sache, Ivan Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon |
description |
Black pod rot, caused by Phytophthora megakarya, is the main cause of cocoa harvest losses in Cameroon. Field experiments were carried out over two successive years in two smallholders¿ plots of cocoa trees, in order to assess the impact of diseased pod removal (phytosanitary pod removal) on disease progress, total production and final harvest. The generalized linear mixed model proved to be the most appropriate for comparing the two treatments (without and with pod removal) set up in a randomized complete block design. Removing diseased pods helped to reduce the black pod rate by 22% and 31% in the two sites in the first year, and by 9% and 11% in the second year, compared to a plot in which no preventive control measures were taken. The rate of cherelle (very young pod) appearance was also higher when pod removal was carried out. Total production was higher in the plots with pod removal, but the difference between the two treatments was not significant. This study allowed an evaluation of the respective roles of primary and secondary inoculum in the spread of the disease. The cultural practice of phytosanitary pod removal was found to be a potentially efficient control method. However, it would need to be associated with other control methods to establish an integrated management system for cocoa farmers. |
format |
article |
topic_facet |
H20 - Maladies des plantes Theobroma cacao maladie des plantes Phytophthora pourriture contrôle de maladies suppression de fruits épidémiologie http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_6667 http://aims.fao.org/aos/agrovoc/c_2327 http://aims.fao.org/aos/agrovoc/c_32701 http://aims.fao.org/aos/agrovoc/c_2615 |
author |
Ndoumbé, Michel Cilas, Christian Nyemb, E. Nyassé, Salomon Bieysse, Daniel Flori, Albert Sache, Ivan |
author_facet |
Ndoumbé, Michel Cilas, Christian Nyemb, E. Nyassé, Salomon Bieysse, Daniel Flori, Albert Sache, Ivan |
author_sort |
Ndoumbé, Michel |
title |
Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon |
title_short |
Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon |
title_full |
Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon |
title_fullStr |
Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon |
title_full_unstemmed |
Impact of removing diseased pods on cocoa black pod caused by Phytophtora megakarya and on cocoa production in Cameroon |
title_sort |
impact of removing diseased pods on cocoa black pod caused by phytophtora megakarya and on cocoa production in cameroon |
url |
http://agritrop.cirad.fr/520158/ http://agritrop.cirad.fr/520158/1/520158.pdf |
work_keys_str_mv |
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