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Abang AF, Nanga SN, Fotso Kuate A, Kouebou C, Suh C, Masso C, Saethre MG, Fiaboe KKM. Natural Enemies of Fall Armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) in Different Agro-Ecologies. Insects 2021; 12:insects12060509. [PMID: 34072988 PMCID: PMC8227933 DOI: 10.3390/insects12060509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 11/16/2022]
Abstract
Fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith) and southern armyworm (SAW) Spodoptera eridania (Stoll) have become major threats to crops in Africa since 2016. African governments adopted emergency actions around chemical insecticides, with limited efforts to assess the richness or roles of indigenous natural enemies. Field surveys and laboratory studies were conducted to identify and assess the performance of parasitoids associated with spodopterans in Cameroon. FAW was the most abundant spodopteran pest. Telenomus remus (Nixon), Trichogramma chilonis (Ishi), Charops sp. (Szépligeti), Coccygidium luteum (Cameron), Cotesia icipe (Fernandez & Fiaboe), and Cotesia sesamiae (Cameron) are the first records in the country on spodopterans. Telenomus remus, T. chilonis, C. icipe, and Charops sp. were obtained from both FAW and SAW; C. luteum and C. sesamiae from FAW. The distribution of spodopterans, their endoparasitoids, and parasitism rates varied with host, season and location. In the laboratory, T. remus showed significantly higher parasitism on FAW than SAW, and significant differences in the development parameters between the two host eggs, with shorter development time on FAW. It induced significant non-reproductive mortality on FAW but not on SAW. Developmental parameters showed that C. icipe has a shorter development time compared to other larval parasitoids. Implications for conservative and augmentative biocontrol are discussed.
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Affiliation(s)
- Albert Fomumbod Abang
- IPM Unit, International Institute of Tropical Agriculture (IITA), P.O. Box 2008 Messa, Yaoundé, Cameroon; (A.F.A.); (S.N.N.); (C.M.); (K.K.M.F.)
| | - Samuel Nanga Nanga
- IPM Unit, International Institute of Tropical Agriculture (IITA), P.O. Box 2008 Messa, Yaoundé, Cameroon; (A.F.A.); (S.N.N.); (C.M.); (K.K.M.F.)
| | - Apollin Fotso Kuate
- IPM Unit, International Institute of Tropical Agriculture (IITA), P.O. Box 2008 Messa, Yaoundé, Cameroon; (A.F.A.); (S.N.N.); (C.M.); (K.K.M.F.)
- Correspondence: ; Tel.: +237-675265715
| | - Christiant Kouebou
- Agricultural Investment and Market Development Project (PIDMA), MINADER, Yaoundé, Cameroon;
- Institute of Agricultural Research for Development (IRAD), P.O. Box 2123, Yaoundé, Cameroon;
| | - Christopher Suh
- Institute of Agricultural Research for Development (IRAD), P.O. Box 2123, Yaoundé, Cameroon;
| | - Cargele Masso
- IPM Unit, International Institute of Tropical Agriculture (IITA), P.O. Box 2008 Messa, Yaoundé, Cameroon; (A.F.A.); (S.N.N.); (C.M.); (K.K.M.F.)
| | - May-Guri Saethre
- International Institute of Tropical Agriculture (IITA), R4D Directorate, PMB 5320, Oyo Road, Ibadan 200001, Oyo State, Nigeria;
- Norwegian Agency for Development Cooperation, Bygdøy allé 2, 0257 Oslo, Norway
| | - Komi Kouma Mokpokpo Fiaboe
- IPM Unit, International Institute of Tropical Agriculture (IITA), P.O. Box 2008 Messa, Yaoundé, Cameroon; (A.F.A.); (S.N.N.); (C.M.); (K.K.M.F.)
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Tize I, Fotso AK, Nukenine EN, Masso C, Ngome FA, Suh C, Lendzemo VW, Nchoutnji I, Manga G, Parkes E, Kulakow P, Kouebou C, Fiaboe KKM, Hanna R. New cassava germplasm for food and nutritional security in Central Africa. Sci Rep 2021; 11:7394. [PMID: 33795808 PMCID: PMC8016988 DOI: 10.1038/s41598-021-86958-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 03/22/2021] [Indexed: 11/08/2022] Open
Abstract
Cassava is a key food security crop in Central Africa, but its production depends largely on the use of local farmers' varieties characterized by inherently low yield which is compounded by generally high susceptibility to various growth and yield-limiting pests and diseases. Improved cassava genotypes have demonstrated the potential to substantially improve cassava's contribution to food security and the development of the cassava industry and the improvement of nutrition status elsewhere in Western Africa. Eleven improved cassava genotypes were compared with a local landrace (LMR) used as a check under field conditions over two years in eight locations, grouped in four agro-ecologies in Cameroon. Pest and disease abundance/incidence and damage severity were evaluated. At harvest, root yield and carotenoid content were measured. Best linear unbiased predictors showed the lowest breeding value for LMR with the cassava mosaic virus disease (+ 66.40 ± 2.42) compared with 1.00 ± 0.02% for the most susceptible improved genotype. Two genotypes (I010040-27 and I011797) stood out for having higher predicted fresh root yield means which were at least 16 times greater compared with LMR. Predicted total carotenoid content was the highest (+ 5.04 ± 0.17) for improved genotype I070593 compared with LMR which showed the lowest (- 3.90 ± 0.06%) and could contribute to the alleviation of vitamin A deficiency from cassava-based food systems. Diffusion of high-yielding and nutritious genotypes could alleviate food and nutritional security in Central Africa.
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Affiliation(s)
- Isaac Tize
- International Institute of Tropical Agriculture, BP 2008, Messa, Yaoundé, Cameroon
- Department of Biological Sciences, University of Ngaoundere, BP 454, Ngaoundere, Cameroon
| | - Apollin Kuate Fotso
- International Institute of Tropical Agriculture, BP 2008, Messa, Yaoundé, Cameroon.
| | - Elias Nchiwan Nukenine
- Department of Biological Sciences, University of Ngaoundere, BP 454, Ngaoundere, Cameroon
| | - Cargele Masso
- International Institute of Tropical Agriculture, BP 2008, Messa, Yaoundé, Cameroon
| | | | - Christopher Suh
- Institute of Agricultural Research for Development, BP 2067, Yaoundé, Cameroon
| | | | - Ibrahim Nchoutnji
- Institute of Agricultural Research for Development, BP 2067, Yaoundé, Cameroon
| | - Gabriel Manga
- Institute of Agricultural Research for Development, BP 2067, Yaoundé, Cameroon
| | - Elisabeth Parkes
- International Institute of Tropical Agriculture, PMB 320 Oyo Road, Ibadan, Nigeria
| | - Peter Kulakow
- International Institute of Tropical Agriculture, PMB 320 Oyo Road, Ibadan, Nigeria
| | - Christiant Kouebou
- Agricultural Investment and Market Development Project, Yaoundé, Cameroon
| | - Komi K M Fiaboe
- International Institute of Tropical Agriculture, BP 2008, Messa, Yaoundé, Cameroon
| | - Rachid Hanna
- International Institute of Tropical Agriculture, BP 2008, Messa, Yaoundé, Cameroon
- Congo Basin Institute, Institute of Environment and Sustainability, University of California, Box 951496, Los Angeles, USA
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Ingenbleek L, Jazet E, Dzossa AD, Adebayo SB, Ogungbangbe J, Dansou S, Diallo ZJ, Kouebou C, Adegboye A, Hossou E, Coulibaly S, Eyangoh S, Le Bizec B, Verger P, Kamanzi J, Merten C, Leblanc JC. Methodology design of the regional Sub-Saharan Africa Total Diet Study in Benin, Cameroon, Mali and Nigeria. Food Chem Toxicol 2017; 109:155-169. [PMID: 28822773 DOI: 10.1016/j.fct.2017.08.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Revised: 08/12/2017] [Accepted: 08/14/2017] [Indexed: 10/19/2022]
Abstract
The core food model was described more than three decades ago, and has been used ever since to identify main food contributors to dietary intakes for both nutrients and other food chemicals. The Sub-Saharan Africa Total Diet Study (SSA-TDS) uses this model to describe the food consumption habits of some selected populations of Benin, Cameroon, Mali, and Nigeria, prior to use in the completion of quantitative risk assessments with regard to food chemicals. Food consumption data were derived from food expenditure data contained in national household budget surveys that were provided by the national institutes of statistics in each country. A classification of African foods was established for the purpose of the study and core foods were selected, so as to reflect 96 ± 1% of the average national total diet expressed in weight. Populations from eight study centers were selected by national stakeholders. This approach involves the purchase of 4020 individual foods, prepared as consumed and pooled into 335 food composite samples, for analysis of mycotoxins, PAHs, PCBs and dioxins, pesticides, metals and trace elements, PFAs, and BFRs. This sampling plan aims to provide a representative, cost effective, and replicable approach for deterministic dietary exposure assessments in developing countries.
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Affiliation(s)
- Luc Ingenbleek
- Centre Pasteur du Cameroun, (CPC), Yaounde, Cameroon; LUNAM Université, Oniris, LABERCA, Nantes, France.
| | - Eric Jazet
- National Institute for Statistics, (NIS), Yaounde, Cameroon.
| | | | - Samson B Adebayo
- National Agency for Food and Drug Administration and Control, (NAFDAC), Abuja, Nigeria.
| | | | - Sylvestre Dansou
- Institut National de la Statistique et de l'Analyse Economique (INSAE), Cotonou, Benin.
| | - Zima J Diallo
- Institut National de la Statistique (INSTAT), Bamako, Mali.
| | - Christiant Kouebou
- Institut de Recherche Agronomique pour le Développement (IRAD), Yaounde, Cameroon.
| | - Abimbola Adegboye
- National Agency for Food and Drug Administration and Control, (NAFDAC), Abuja, Nigeria.
| | - Epiphane Hossou
- Agence Béninoise de Sécurité Sanitaire des Aliments (ABSSA), Cotonou, Benin.
| | - Salimata Coulibaly
- Agence Nationale pour la Sécurité Sanitaire des Aliments (ANSSA), Bamako, Mali.
| | - Sara Eyangoh
- Centre Pasteur du Cameroun, (CPC), Yaounde, Cameroon.
| | | | | | - Jean Kamanzi
- Food and Agriculture Organization of the United Nations (FAO), Rome, Italy.
| | - Caroline Merten
- Food and Agriculture Organization of the United Nations (FAO), Rome, Italy.
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