Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice
The brown planthopper, Nilaparvata lugens (Stål), is a key challenge to rice production in Asia. Outbreaks of planthoppers are associated with excessive fertilizer applications; consequently, we examined planthopper interactions with susceptible, tolerant and resistant varieties of rice under varyin...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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MDPI
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/164167 |
| _version_ | 1855528669548642304 |
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| author | Horgan, Finbarr G. de Freitas, Thais Fernanda S. Crisol-Martínez, Eduardo Mundaca, Enrique A. Bernal, Carmencita C. |
| author_browse | Bernal, Carmencita C. Crisol-Martínez, Eduardo Horgan, Finbarr G. Mundaca, Enrique A. de Freitas, Thais Fernanda S. |
| author_facet | Horgan, Finbarr G. de Freitas, Thais Fernanda S. Crisol-Martínez, Eduardo Mundaca, Enrique A. Bernal, Carmencita C. |
| author_sort | Horgan, Finbarr G. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The brown planthopper, Nilaparvata lugens (Stål), is a key challenge to rice production in Asia. Outbreaks of planthoppers are associated with excessive fertilizer applications; consequently, we examined planthopper interactions with susceptible, tolerant and resistant varieties of rice under varying levels of soil nitrogen in a greenhouse experiment. We compared planthopper fitness (survival × reproduction) and plant tolerance (functional plant loss index) for 16 varieties at 0, 80 and 150 Kg added nitrogen ha−1. The planthoppers grew larger, developed more quickly and laid more eggs on susceptible varieties, compared with the resistant and tolerant varieties. Moreover, soil nitrogen generally increased planthopper fitness on resistant varieties, but relative resistance was maintained. Functional plant loss was highest among the susceptible varieties, but weight and growth rate reductions per mg of planthopper were often highest in the tolerant varieties. Tolerance was associated with large, fast-growing plants, with at least moderate resistance to the planthopper. Susceptibility was associated with a small size and/or an absence of resistance genes. Our results suggested that early-tillering rice plants can be both resistant and tolerant to the brown planthopper, but cannot be both susceptible and tolerant of planthoppers at high densities. This indicates that at least moderate resistance is required for tolerance against this herbivore. Furthermore, although dwarf varieties had a low tolerance of planthoppers, they could express resistance through functioning resistance genes. |
| format | Journal Article |
| id | CGSpace164167 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1641672024-12-22T05:44:55Z Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice Horgan, Finbarr G. de Freitas, Thais Fernanda S. Crisol-Martínez, Eduardo Mundaca, Enrique A. Bernal, Carmencita C. insect science brown planthopper compensation nilaparvata lugens phenotyping sogatella furcifera sustainable agriculture The brown planthopper, Nilaparvata lugens (Stål), is a key challenge to rice production in Asia. Outbreaks of planthoppers are associated with excessive fertilizer applications; consequently, we examined planthopper interactions with susceptible, tolerant and resistant varieties of rice under varying levels of soil nitrogen in a greenhouse experiment. We compared planthopper fitness (survival × reproduction) and plant tolerance (functional plant loss index) for 16 varieties at 0, 80 and 150 Kg added nitrogen ha−1. The planthoppers grew larger, developed more quickly and laid more eggs on susceptible varieties, compared with the resistant and tolerant varieties. Moreover, soil nitrogen generally increased planthopper fitness on resistant varieties, but relative resistance was maintained. Functional plant loss was highest among the susceptible varieties, but weight and growth rate reductions per mg of planthopper were often highest in the tolerant varieties. Tolerance was associated with large, fast-growing plants, with at least moderate resistance to the planthopper. Susceptibility was associated with a small size and/or an absence of resistance genes. Our results suggested that early-tillering rice plants can be both resistant and tolerant to the brown planthopper, but cannot be both susceptible and tolerant of planthoppers at high densities. This indicates that at least moderate resistance is required for tolerance against this herbivore. Furthermore, although dwarf varieties had a low tolerance of planthoppers, they could express resistance through functioning resistance genes. 2021-11-03 2024-12-19T12:53:32Z 2024-12-19T12:53:32Z Journal Article https://hdl.handle.net/10568/164167 en Open Access MDPI Horgan, Finbarr G.; de Freitas, Thais Fernanda S.; Crisol-Martínez, Eduardo; Mundaca, Enrique A. and Bernal, Carmencita C. 2021. Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice. Insects, Volume 12 no. 11 p. 989 |
| spellingShingle | insect science brown planthopper compensation nilaparvata lugens phenotyping sogatella furcifera sustainable agriculture Horgan, Finbarr G. de Freitas, Thais Fernanda S. Crisol-Martínez, Eduardo Mundaca, Enrique A. Bernal, Carmencita C. Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice |
| title | Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice |
| title_full | Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice |
| title_fullStr | Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice |
| title_full_unstemmed | Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice |
| title_short | Nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast-growing, moderately resistant rice |
| title_sort | nitrogenous fertilizer reduces resistance but enhances tolerance to the brown planthopper in fast growing moderately resistant rice |
| topic | insect science brown planthopper compensation nilaparvata lugens phenotyping sogatella furcifera sustainable agriculture |
| url | https://hdl.handle.net/10568/164167 |
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