The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria
Abstract 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 c...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-05-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-11424-0 |
| _version_ | 1811253244952838144 |
|---|---|
| author | Samuel F. Kamga Frank T. Ndjomatchoua Ritter A. Guimapi Ingeborg Klingen Clément Tchawoua Anne-Grete Roer Hjelkrem Karl H. Thunes Francois M. Kakmeni |
| author_facet | Samuel F. Kamga Frank T. Ndjomatchoua Ritter A. Guimapi Ingeborg Klingen Clément Tchawoua Anne-Grete Roer Hjelkrem Karl H. Thunes Francois M. Kakmeni |
| author_sort | Samuel F. Kamga |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-04-12T16:46:58Z |
| format | Article |
| id | doaj.art-4c52f1bc7326436688bd8965bed38685 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-12T16:46:58Z |
| publishDate | 2022-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-4c52f1bc7326436688bd8965bed386852022-12-22T03:24:32ZengNature PortfolioScientific Reports2045-23222022-05-0112111510.1038/s41598-022-11424-0The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregariaSamuel F. Kamga0Frank T. Ndjomatchoua1Ritter A. Guimapi2Ingeborg Klingen3Clément Tchawoua4Anne-Grete Roer Hjelkrem5Karl H. Thunes6Francois M. Kakmeni7Department of Physics, Faculty of Science, University of Yaoundé 1Sustainable Impact Through Rice-Based Systems, International Rice Research Institute (IRRI)Biotechnology and Plant Health Division, Norwegian Institute of Bioeconomy Research (NIBIO)Biotechnology and Plant Health Division, Norwegian Institute of Bioeconomy Research (NIBIO)Department of Physics, Faculty of Science, University of Yaoundé 1Division of Food Production and Society, Norwegian Institute of Bioeconomy Research (NIBIO)Biotechnology and Plant Health Division, Norwegian Institute of Bioeconomy Research (NIBIO)Department of Physics, Faculty of Science, University of BueaAbstract 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.https://doi.org/10.1038/s41598-022-11424-0 |
| spellingShingle | Samuel F. Kamga Frank T. Ndjomatchoua Ritter A. Guimapi Ingeborg Klingen Clément Tchawoua Anne-Grete Roer Hjelkrem Karl H. Thunes Francois M. Kakmeni The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria Scientific Reports |
| 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 |
| url | https://doi.org/10.1038/s41598-022-11424-0 |
| work_keys_str_mv | AT samuelfkamga theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT franktndjomatchoua theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT ritteraguimapi theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT ingeborgklingen theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT clementtchawoua theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT annegreteroerhjelkrem theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT karlhthunes theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT francoismkakmeni theeffectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT samuelfkamga effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT franktndjomatchoua effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT ritteraguimapi effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT ingeborgklingen effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT clementtchawoua effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT annegreteroerhjelkrem effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT karlhthunes effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria AT francoismkakmeni effectofclimatevariabilityintheefficacyoftheentomopathogenicfungusmetarhiziumacridumagainstthedesertlocustschistocercagregaria |