Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties
This study examines the nature of intraspecific interactions among Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) planthoppers feeding on resistant and susceptible rice varieties. Planthopper nymphs produced less honeydew and gained less weight when feeding on rice variety IR62 (resistant) compa...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Wiley
2016
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| Online Access: | https://hdl.handle.net/10568/165297 |
| _version_ | 1855527887451455488 |
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| author | Horgan, Finbarr G. Naik, Bhaskar S. Iswanto, Eko Hari Almazan, Maria Liberty P. Ramal, Angelee Fame Bernal, Carmencita C. |
| author_browse | Almazan, Maria Liberty P. Bernal, Carmencita C. Horgan, Finbarr G. Iswanto, Eko Hari Naik, Bhaskar S. Ramal, Angelee Fame |
| author_facet | Horgan, Finbarr G. Naik, Bhaskar S. Iswanto, Eko Hari Almazan, Maria Liberty P. Ramal, Angelee Fame Bernal, Carmencita C. |
| author_sort | Horgan, Finbarr G. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | This study examines the nature of intraspecific interactions among Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) planthoppers feeding on resistant and susceptible rice varieties. Planthopper nymphs produced less honeydew and gained less weight when feeding on rice variety IR62 (resistant) compared to susceptible rice varieties. A series of bioassays was conducted that varied N. lugens nymph densities on IR62 and IR22 (susceptible). Increasing nymph density facilitated feeding by conspecifics; however, intraspecific competition increased mortality of nymphs on IR62 (but rarely on IR22). Furthermore, nymph weights declined with increasing conspecific density on IR22, and the effects were weak on IR62. More female nymphs than males survived on IR62 but this was not affected by density. Nitrogenous fertilizer increased competition among N. lugens on young plants of IR22, but not on IR62. Results indicate that nymphs have a low efficiency in accessing resources when feeding on IR62, even where the plants have received fertilizer. Female‐biased survival and biomass compensation for mortality may promote population recovery after development on the resistant plant and accelerate adaptation to the resistant variety. |
| format | Journal Article |
| id | CGSpace165297 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1652972024-12-22T05:44:55Z Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties Horgan, Finbarr G. Naik, Bhaskar S. Iswanto, Eko Hari Almazan, Maria Liberty P. Ramal, Angelee Fame Bernal, Carmencita C. This study examines the nature of intraspecific interactions among Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) planthoppers feeding on resistant and susceptible rice varieties. Planthopper nymphs produced less honeydew and gained less weight when feeding on rice variety IR62 (resistant) compared to susceptible rice varieties. A series of bioassays was conducted that varied N. lugens nymph densities on IR62 and IR22 (susceptible). Increasing nymph density facilitated feeding by conspecifics; however, intraspecific competition increased mortality of nymphs on IR62 (but rarely on IR22). Furthermore, nymph weights declined with increasing conspecific density on IR22, and the effects were weak on IR62. More female nymphs than males survived on IR62 but this was not affected by density. Nitrogenous fertilizer increased competition among N. lugens on young plants of IR22, but not on IR62. Results indicate that nymphs have a low efficiency in accessing resources when feeding on IR62, even where the plants have received fertilizer. Female‐biased survival and biomass compensation for mortality may promote population recovery after development on the resistant plant and accelerate adaptation to the resistant variety. 2016-03 2024-12-19T12:54:55Z 2024-12-19T12:54:55Z Journal Article https://hdl.handle.net/10568/165297 en Wiley Horgan, Finbarr G.; Naik, Bhaskar S.; Iswanto, Eko Hari; Almazan, Maria Liberty P.; Ramal, Angelee Fame and Bernal, Carmencita C. 2016. Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties. Entomologia Exp Applicata, Volume 158 no. 3 p. 284-294 |
| spellingShingle | Horgan, Finbarr G. Naik, Bhaskar S. Iswanto, Eko Hari Almazan, Maria Liberty P. Ramal, Angelee Fame Bernal, Carmencita C. Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties |
| title | Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties |
| title_full | Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties |
| title_fullStr | Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties |
| title_full_unstemmed | Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties |
| title_short | Responses by the brown planthopper, nilaparvata lugens, to conspecific density on resistant and susceptible rice varieties |
| title_sort | responses by the brown planthopper nilaparvata lugens to conspecific density on resistant and susceptible rice varieties |
| url | https://hdl.handle.net/10568/165297 |
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