Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management
The fall armyworm (FAW), Spodoptera frugiperda, a major pest in maize production, was assessed for its temporal and spatial distribution in maize fields during both the dry and rainy seasons of 2021 and 2022 in two agroecological regions in Benin (zone 6 and 8). Zone 6 (AEZ 6) “called zone of terre...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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MDPI
2025
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| Acceso en línea: | https://hdl.handle.net/10568/173748 |
| _version_ | 1855543029752922112 |
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| author | Zanzana, K. Sinzogan, A. Tepa-Yotto, G. Dannon, E. Goergen, G. Tamò, Manuele |
| author_browse | Dannon, E. Goergen, G. Sinzogan, A. Tamò, Manuele Tepa-Yotto, G. Zanzana, K. |
| author_facet | Zanzana, K. Sinzogan, A. Tepa-Yotto, G. Dannon, E. Goergen, G. Tamò, Manuele |
| author_sort | Zanzana, K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The fall armyworm (FAW), Spodoptera frugiperda, a major pest in maize production, was assessed for its temporal and spatial distribution in maize fields during both the dry and rainy seasons of 2021 and 2022 in two agroecological regions in Benin (zone 6 and 8). Zone 6 (AEZ 6) “called zone of terre de barre” (Southern and Central Benin) consisted of ferralitic soils, a Sudano-Guinean climate (two rainy seasons alternating with two dry seasons) with a rainfall ranging between 800 and 1400 mm of rainfall per year; while zone 8 (AEZ 8) called “fisheries region” (Southern Benin” is characterized by coastal gleysols and arenosols with a Sudano-Guinean climate and a rainfall of 900–1400 mm of rainfall per year. In this study, 30 and 50 maize plants were randomly sampled using a “W” pattern during the dry and rainy seasons, respectively. Larval density, larval infestation rates, and damage severity were monitored over time. Taylor’s power law and the mean crowding aggregation index were applied to evaluate the dispersion patterns of the larvae. The results indicate a higher larval infestation rate and larval density in AEZ 8 compared to AEZ 6 during the dry season. In the rainy season, while the percentage of damaged plants was higher in AZE 8, no significant differences in larval density between the two zones were observed. The dispersion analysis revealed moderate aggregation (aggregation index = 1.25) with a basic colony of 2.08 larvae, i.e., an average initial cluster of 2.08 larvae observed per plant, reflecting the aggregation oviposition behavior of FAW. This study provides valuable monitoring data on the FAW’s distribution, offering insights for further research on population dynamics and developing predictive models for integrated pest management strategies. |
| format | Journal Article |
| id | CGSpace173748 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1737482025-12-08T10:29:22Z Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management Zanzana, K. Sinzogan, A. Tepa-Yotto, G. Dannon, E. Goergen, G. Tamò, Manuele climate variability damage plant spatial distribution maize The fall armyworm (FAW), Spodoptera frugiperda, a major pest in maize production, was assessed for its temporal and spatial distribution in maize fields during both the dry and rainy seasons of 2021 and 2022 in two agroecological regions in Benin (zone 6 and 8). Zone 6 (AEZ 6) “called zone of terre de barre” (Southern and Central Benin) consisted of ferralitic soils, a Sudano-Guinean climate (two rainy seasons alternating with two dry seasons) with a rainfall ranging between 800 and 1400 mm of rainfall per year; while zone 8 (AEZ 8) called “fisheries region” (Southern Benin” is characterized by coastal gleysols and arenosols with a Sudano-Guinean climate and a rainfall of 900–1400 mm of rainfall per year. In this study, 30 and 50 maize plants were randomly sampled using a “W” pattern during the dry and rainy seasons, respectively. Larval density, larval infestation rates, and damage severity were monitored over time. Taylor’s power law and the mean crowding aggregation index were applied to evaluate the dispersion patterns of the larvae. The results indicate a higher larval infestation rate and larval density in AEZ 8 compared to AEZ 6 during the dry season. In the rainy season, while the percentage of damaged plants was higher in AZE 8, no significant differences in larval density between the two zones were observed. The dispersion analysis revealed moderate aggregation (aggregation index = 1.25) with a basic colony of 2.08 larvae, i.e., an average initial cluster of 2.08 larvae observed per plant, reflecting the aggregation oviposition behavior of FAW. This study provides valuable monitoring data on the FAW’s distribution, offering insights for further research on population dynamics and developing predictive models for integrated pest management strategies. 2025-02-01 2025-03-20T10:24:57Z 2025-03-20T10:24:57Z Journal Article https://hdl.handle.net/10568/173748 en Open Access application/pdf MDPI Zanzana, K., Sinzogan, A., Tepa-Yotto, G. T., Dannon, E., Goergen, G. & Tamò, M. (2025). Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management. Insects, 16(2): 145, 1-17. |
| spellingShingle | climate variability damage plant spatial distribution maize Zanzana, K. Sinzogan, A. Tepa-Yotto, G. Dannon, E. Goergen, G. Tamò, Manuele Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management |
| title | Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management |
| title_full | Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management |
| title_fullStr | Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management |
| title_full_unstemmed | Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management |
| title_short | Seasonal and spatial distribution of fall armyworm larvae in maize fields: implications for integrated pest management |
| title_sort | seasonal and spatial distribution of fall armyworm larvae in maize fields implications for integrated pest management |
| topic | climate variability damage plant spatial distribution maize |
| url | https://hdl.handle.net/10568/173748 |
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