Effects of complex cocoa-based agroforests on citrus tree decline
Citrus are important fruit crops of high economic and ecological importance in southern Cameroon. Smallholders usually plant citrus in complex cocoa-based agroforests (CBAS). Health and productivity of citrus are generally jeopardized by a wide range of pests and diseases for which environmental conditions can be critical drivers. An assessment of the effects of two structural characteristics of CBAS on citrus tree decline (CTD) intensity and six pests and diseases that induce it was conducted in 26 farms. The study was carried out in four citrus-growing basins in the Centre Region of Cameroon between June and September 2016. Observations were made by visual recognition of CTD, as well as disease symptoms and pest damage. Their intensity or abundance was assessed using a scale ranging from 1 to 4. Depending on the situation of citrus trees in the CBAS and with regard to the upper strata, three shade level (dense, moderate and no shade), and three spatial structural patterns (aggregate, random and regular) were defined. Results showed that, CTD intensity under dense shade conditions was significantly low (P < 0.001), as compared to those in moderate and no shade conditions. Plots with aggregated or random spatial structure of citrus trees showed significantly higher CTD intensities (P < 0.001) compared to those with a regular spatial structure of citrus trees. The involvement of CBAS structural characteristics in CTD regulation has been demonstrated and could contribute to the development of an integrated management tool for citrus pests and diseases in an associated crop context.
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Subjects: | H20 - Maladies des plantes, H10 - Ravageurs des plantes, H50 - Troubles divers des plantes, Citrus, agroforesterie, maladie des plantes, ravageur des plantes, Theobroma cacao, culture associée, gestion intégrée des ravageurs, arbre d'ombrage, http://aims.fao.org/aos/agrovoc/c_1637, http://aims.fao.org/aos/agrovoc/c_207, http://aims.fao.org/aos/agrovoc/c_5962, http://aims.fao.org/aos/agrovoc/c_16196, http://aims.fao.org/aos/agrovoc/c_7713, http://aims.fao.org/aos/agrovoc/c_35927, http://aims.fao.org/aos/agrovoc/c_34030, http://aims.fao.org/aos/agrovoc/c_25548, http://aims.fao.org/aos/agrovoc/c_1229, |
Online Access: | http://agritrop.cirad.fr/595338/ http://agritrop.cirad.fr/595338/1/Mvondo_etal_CroPro2020.pdf |
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dig-cirad-fr-5953382024-01-29T02:40:59Z http://agritrop.cirad.fr/595338/ http://agritrop.cirad.fr/595338/ Effects of complex cocoa-based agroforests on citrus tree decline. Akoutou Mvondo Etienne, Ndo Eunice Golda Danièle, Tsouga Manga Milie Lionnelle, Aba'ane C.L., Abondo Bitoumou J., Manga Bella, Bidzanga Nomo Lucien, Ambang Zachée, Cilas Christian. 2020. Crop Protection, 130:105051, 7 p.https://doi.org/10.1016/j.cropro.2019.105051 <https://doi.org/10.1016/j.cropro.2019.105051> Effects of complex cocoa-based agroforests on citrus tree decline Akoutou Mvondo, Etienne Ndo, Eunice Golda Danièle Tsouga Manga, Milie Lionnelle Aba'ane, C.L. Abondo Bitoumou, J. Manga, Bella Bidzanga Nomo, Lucien Ambang, Zachée Cilas, Christian eng 2020 Crop Protection H20 - Maladies des plantes H10 - Ravageurs des plantes H50 - Troubles divers des plantes Citrus agroforesterie maladie des plantes ravageur des plantes Theobroma cacao culture associée gestion intégrée des ravageurs arbre d'ombrage http://aims.fao.org/aos/agrovoc/c_1637 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_16196 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_34030 http://aims.fao.org/aos/agrovoc/c_25548 Cameroun http://aims.fao.org/aos/agrovoc/c_1229 Citrus are important fruit crops of high economic and ecological importance in southern Cameroon. Smallholders usually plant citrus in complex cocoa-based agroforests (CBAS). Health and productivity of citrus are generally jeopardized by a wide range of pests and diseases for which environmental conditions can be critical drivers. An assessment of the effects of two structural characteristics of CBAS on citrus tree decline (CTD) intensity and six pests and diseases that induce it was conducted in 26 farms. The study was carried out in four citrus-growing basins in the Centre Region of Cameroon between June and September 2016. Observations were made by visual recognition of CTD, as well as disease symptoms and pest damage. Their intensity or abundance was assessed using a scale ranging from 1 to 4. Depending on the situation of citrus trees in the CBAS and with regard to the upper strata, three shade level (dense, moderate and no shade), and three spatial structural patterns (aggregate, random and regular) were defined. Results showed that, CTD intensity under dense shade conditions was significantly low (P < 0.001), as compared to those in moderate and no shade conditions. Plots with aggregated or random spatial structure of citrus trees showed significantly higher CTD intensities (P < 0.001) compared to those with a regular spatial structure of citrus trees. The involvement of CBAS structural characteristics in CTD regulation has been demonstrated and could contribute to the development of an integrated management tool for citrus pests and diseases in an associated crop context. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/595338/1/Mvondo_etal_CroPro2020.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.cropro.2019.105051 10.1016/j.cropro.2019.105051 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cropro.2019.105051 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.cropro.2019.105051 |
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H20 - Maladies des plantes H10 - Ravageurs des plantes H50 - Troubles divers des plantes Citrus agroforesterie maladie des plantes ravageur des plantes Theobroma cacao culture associée gestion intégrée des ravageurs arbre d'ombrage http://aims.fao.org/aos/agrovoc/c_1637 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_16196 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_34030 http://aims.fao.org/aos/agrovoc/c_25548 http://aims.fao.org/aos/agrovoc/c_1229 H20 - Maladies des plantes H10 - Ravageurs des plantes H50 - Troubles divers des plantes Citrus agroforesterie maladie des plantes ravageur des plantes Theobroma cacao culture associée gestion intégrée des ravageurs arbre d'ombrage http://aims.fao.org/aos/agrovoc/c_1637 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_16196 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_34030 http://aims.fao.org/aos/agrovoc/c_25548 http://aims.fao.org/aos/agrovoc/c_1229 |
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H20 - Maladies des plantes H10 - Ravageurs des plantes H50 - Troubles divers des plantes Citrus agroforesterie maladie des plantes ravageur des plantes Theobroma cacao culture associée gestion intégrée des ravageurs arbre d'ombrage http://aims.fao.org/aos/agrovoc/c_1637 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_16196 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_34030 http://aims.fao.org/aos/agrovoc/c_25548 http://aims.fao.org/aos/agrovoc/c_1229 H20 - Maladies des plantes H10 - Ravageurs des plantes H50 - Troubles divers des plantes Citrus agroforesterie maladie des plantes ravageur des plantes Theobroma cacao culture associée gestion intégrée des ravageurs arbre d'ombrage http://aims.fao.org/aos/agrovoc/c_1637 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_16196 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_34030 http://aims.fao.org/aos/agrovoc/c_25548 http://aims.fao.org/aos/agrovoc/c_1229 Akoutou Mvondo, Etienne Ndo, Eunice Golda Danièle Tsouga Manga, Milie Lionnelle Aba'ane, C.L. Abondo Bitoumou, J. Manga, Bella Bidzanga Nomo, Lucien Ambang, Zachée Cilas, Christian Effects of complex cocoa-based agroforests on citrus tree decline |
description |
Citrus are important fruit crops of high economic and ecological importance in southern Cameroon. Smallholders usually plant citrus in complex cocoa-based agroforests (CBAS). Health and productivity of citrus are generally jeopardized by a wide range of pests and diseases for which environmental conditions can be critical drivers. An assessment of the effects of two structural characteristics of CBAS on citrus tree decline (CTD) intensity and six pests and diseases that induce it was conducted in 26 farms. The study was carried out in four citrus-growing basins in the Centre Region of Cameroon between June and September 2016. Observations were made by visual recognition of CTD, as well as disease symptoms and pest damage. Their intensity or abundance was assessed using a scale ranging from 1 to 4. Depending on the situation of citrus trees in the CBAS and with regard to the upper strata, three shade level (dense, moderate and no shade), and three spatial structural patterns (aggregate, random and regular) were defined. Results showed that, CTD intensity under dense shade conditions was significantly low (P < 0.001), as compared to those in moderate and no shade conditions. Plots with aggregated or random spatial structure of citrus trees showed significantly higher CTD intensities (P < 0.001) compared to those with a regular spatial structure of citrus trees. The involvement of CBAS structural characteristics in CTD regulation has been demonstrated and could contribute to the development of an integrated management tool for citrus pests and diseases in an associated crop context. |
format |
article |
topic_facet |
H20 - Maladies des plantes H10 - Ravageurs des plantes H50 - Troubles divers des plantes Citrus agroforesterie maladie des plantes ravageur des plantes Theobroma cacao culture associée gestion intégrée des ravageurs arbre d'ombrage http://aims.fao.org/aos/agrovoc/c_1637 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_5962 http://aims.fao.org/aos/agrovoc/c_16196 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_34030 http://aims.fao.org/aos/agrovoc/c_25548 http://aims.fao.org/aos/agrovoc/c_1229 |
author |
Akoutou Mvondo, Etienne Ndo, Eunice Golda Danièle Tsouga Manga, Milie Lionnelle Aba'ane, C.L. Abondo Bitoumou, J. Manga, Bella Bidzanga Nomo, Lucien Ambang, Zachée Cilas, Christian |
author_facet |
Akoutou Mvondo, Etienne Ndo, Eunice Golda Danièle Tsouga Manga, Milie Lionnelle Aba'ane, C.L. Abondo Bitoumou, J. Manga, Bella Bidzanga Nomo, Lucien Ambang, Zachée Cilas, Christian |
author_sort |
Akoutou Mvondo, Etienne |
title |
Effects of complex cocoa-based agroforests on citrus tree decline |
title_short |
Effects of complex cocoa-based agroforests on citrus tree decline |
title_full |
Effects of complex cocoa-based agroforests on citrus tree decline |
title_fullStr |
Effects of complex cocoa-based agroforests on citrus tree decline |
title_full_unstemmed |
Effects of complex cocoa-based agroforests on citrus tree decline |
title_sort |
effects of complex cocoa-based agroforests on citrus tree decline |
url |
http://agritrop.cirad.fr/595338/ http://agritrop.cirad.fr/595338/1/Mvondo_etal_CroPro2020.pdf |
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_version_ |
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