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The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria
Despite substantial efforts to control locusts they remain periodically a major burden in Africa, causing severe yield loss and hence loss of food and income. Distribution maps indicating the value of the basic reproduction number R(0) was used to identify areas where an insect pest can be controlle...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9085851/ https://www.ncbi.nlm.nih.gov/pubmed/35534636 http://dx.doi.org/10.1038/s41598-022-11424-0 |
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author | Kamga, Samuel F. Ndjomatchoua, Frank T. Guimapi, Ritter A. Klingen, Ingeborg Tchawoua, Clément Hjelkrem, Anne-Grete Roer Thunes, Karl H. Kakmeni, Francois M. |
author_facet | Kamga, Samuel F. Ndjomatchoua, Frank T. Guimapi, Ritter A. Klingen, Ingeborg Tchawoua, Clément Hjelkrem, Anne-Grete Roer Thunes, Karl H. Kakmeni, Francois M. |
author_sort | Kamga, Samuel F. |
collection | PubMed |
description | Despite substantial efforts to control locusts they remain periodically a major burden in Africa, causing severe yield loss and hence loss of food and income. Distribution maps indicating the value of the basic reproduction number R(0) was used to identify areas where an insect pest can be controlled by a natural enemy. A dynamic process-based mathematical model integrating essential features of a natural enemy and its interaction with the pest is used to generate R(0) risk maps for insect pest outbreaks, using desert locust and the entomopathogenic fungus Metarhizium acridum (Synn. Metarhizium anisoliae var. acridum) as a case study. This approach provides a tool for evaluating the impact of climatic variables such as temperature and relative humidity and mapping spatial variability on the efficacy of M. acridum as a biocontrol agent against desert locust invasion in Africa. Applications of M. acridum against desert locust in a few selected African countries including Morocco, Kenya, Mali, and Mauritania through monthly spatial projection of R(0) maps for the prevailing climatic condition are illustrated. By combining mathematical modeling with a geographic information system in a spatiotemporal projection as we do in this study, the field implementation of microbial control against locust in an integrated pest management system may be improved. Finally, the practical utility of this model provides insights that may improve the timing of pesticide application in a selected area where efficacy is highly expected. |
format | Online Article Text |
id | pubmed-9085851 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-90858512022-05-11 The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria Kamga, Samuel F. Ndjomatchoua, Frank T. Guimapi, Ritter A. Klingen, Ingeborg Tchawoua, Clément Hjelkrem, Anne-Grete Roer Thunes, Karl H. Kakmeni, Francois M. Sci Rep Article Despite substantial efforts to control locusts they remain periodically a major burden in Africa, causing severe yield loss and hence loss of food and income. Distribution maps indicating the value of the basic reproduction number R(0) was used to identify areas where an insect pest can be controlled by a natural enemy. A dynamic process-based mathematical model integrating essential features of a natural enemy and its interaction with the pest is used to generate R(0) risk maps for insect pest outbreaks, using desert locust and the entomopathogenic fungus Metarhizium acridum (Synn. Metarhizium anisoliae var. acridum) as a case study. This approach provides a tool for evaluating the impact of climatic variables such as temperature and relative humidity and mapping spatial variability on the efficacy of M. acridum as a biocontrol agent against desert locust invasion in Africa. Applications of M. acridum against desert locust in a few selected African countries including Morocco, Kenya, Mali, and Mauritania through monthly spatial projection of R(0) maps for the prevailing climatic condition are illustrated. By combining mathematical modeling with a geographic information system in a spatiotemporal projection as we do in this study, the field implementation of microbial control against locust in an integrated pest management system may be improved. Finally, the practical utility of this model provides insights that may improve the timing of pesticide application in a selected area where efficacy is highly expected. Nature Publishing Group UK 2022-05-09 /pmc/articles/PMC9085851/ /pubmed/35534636 http://dx.doi.org/10.1038/s41598-022-11424-0 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Kamga, Samuel F. Ndjomatchoua, Frank T. Guimapi, Ritter A. Klingen, Ingeborg Tchawoua, Clément Hjelkrem, Anne-Grete Roer Thunes, Karl H. Kakmeni, Francois M. The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria |
title | The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria |
title_full | The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria |
title_fullStr | The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria |
title_full_unstemmed | The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria |
title_short | The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria |
title_sort | effect of climate variability in the efficacy of the entomopathogenic fungus metarhizium acridum against the desert locust schistocerca gregaria |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9085851/ https://www.ncbi.nlm.nih.gov/pubmed/35534636 http://dx.doi.org/10.1038/s41598-022-11424-0 |
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