The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae)
The leaf-webber Spoladea recurvalis F. is the most devastating pest of amaranths in East Africa. Recent collaborative research in Asia and East Africa revealed one highly resistant amaranth accession (VI036227) to the pest and seven moderately resistant ones (RVI00053, VI033479, VI044437-A, VI047555...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Oxford University Press
2019
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/99691 |
| _version_ | 1855530721357070336 |
|---|---|
| author | Othim, S.T.O. Ramasamy, S. Kahuthia-Gathu, R. Dubois, T. Ekesi, S. Fiaboe, K.K.M. |
| author_browse | Dubois, T. Ekesi, S. Fiaboe, K.K.M. Kahuthia-Gathu, R. Othim, S.T.O. Ramasamy, S. |
| author_facet | Othim, S.T.O. Ramasamy, S. Kahuthia-Gathu, R. Dubois, T. Ekesi, S. Fiaboe, K.K.M. |
| author_sort | Othim, S.T.O. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The leaf-webber Spoladea recurvalis F. is the most devastating pest of amaranths in East Africa. Recent collaborative research in Asia and East Africa revealed one highly resistant amaranth accession (VI036227) to the pest and seven moderately resistant ones (RVI00053, VI033479, VI044437-A, VI047555-B, VI048076, VI049698, and VI056563). The solitary koinobiontic endoparasitoid Apanteles hemara Nixon has also been reported as efficient against the pest. Plant resistance to herbivores may have bottom-up effects on their parasitoids. In this study, we assessed the effects of the seven moderately resistant amaranth accessions and one susceptible accession (VI033482) on the performance of A. hemara. Except VI056563 that recorded lower parasitism rates compared to the susceptible accession, A. hemara performed well on all the other moderately resistant accessions. The longevity of the parasitoid was significantly extended on the resistant accessions compared to the susceptible one. While the parasitoid’s body size, developmental time, and survival differed significantly between resistant accessions, they were similar to results obtained on the susceptible accession. Furthermore, while the parasitoid’s sex ratio was male-biased in the susceptible accession, balanced sex ratios were obtained from accessions RVI00053, VI033479, VI044437-A, VI047555-B, VI048076, and VI049698. Significant nonreproductive host larval mortality was induced by A. hemara on all the tested accessions. These results suggest that the moderately resistant accessions can be used in combination with the endoparasitoid A. hemara to manage S. recurvalis and other amaranth leaf-webbers in the context of integrated pest management. |
| format | Journal Article |
| id | CGSpace99691 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Oxford University Press |
| publisherStr | Oxford University Press |
| record_format | dspace |
| spelling | CGSpace996912023-12-08T19:36:04Z The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae) Othim, S.T.O. Ramasamy, S. Kahuthia-Gathu, R. Dubois, T. Ekesi, S. Fiaboe, K.K.M. allelochemical fitness ipm mortality parasitism The leaf-webber Spoladea recurvalis F. is the most devastating pest of amaranths in East Africa. Recent collaborative research in Asia and East Africa revealed one highly resistant amaranth accession (VI036227) to the pest and seven moderately resistant ones (RVI00053, VI033479, VI044437-A, VI047555-B, VI048076, VI049698, and VI056563). The solitary koinobiontic endoparasitoid Apanteles hemara Nixon has also been reported as efficient against the pest. Plant resistance to herbivores may have bottom-up effects on their parasitoids. In this study, we assessed the effects of the seven moderately resistant amaranth accessions and one susceptible accession (VI033482) on the performance of A. hemara. Except VI056563 that recorded lower parasitism rates compared to the susceptible accession, A. hemara performed well on all the other moderately resistant accessions. The longevity of the parasitoid was significantly extended on the resistant accessions compared to the susceptible one. While the parasitoid’s body size, developmental time, and survival differed significantly between resistant accessions, they were similar to results obtained on the susceptible accession. Furthermore, while the parasitoid’s sex ratio was male-biased in the susceptible accession, balanced sex ratios were obtained from accessions RVI00053, VI033479, VI044437-A, VI047555-B, VI048076, and VI049698. Significant nonreproductive host larval mortality was induced by A. hemara on all the tested accessions. These results suggest that the moderately resistant accessions can be used in combination with the endoparasitoid A. hemara to manage S. recurvalis and other amaranth leaf-webbers in the context of integrated pest management. 2019-02-13 2019-02-26T09:01:01Z 2019-02-26T09:01:01Z Journal Article https://hdl.handle.net/10568/99691 en Limited Access Oxford University Press Othim, S.T.O., Ramasamy, S., Kahuthia-Gathu, R., Dubois, T., Ekesi, S. & Fiaboe, K. (2019). The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae). Environmental Entomology, 48(1), 163-172. |
| spellingShingle | allelochemical fitness ipm mortality parasitism Othim, S.T.O. Ramasamy, S. Kahuthia-Gathu, R. Dubois, T. Ekesi, S. Fiaboe, K.K.M. The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae) |
| title | The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae) |
| title_full | The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae) |
| title_fullStr | The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae) |
| title_full_unstemmed | The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae) |
| title_short | The effects of pest-resistant amaranth accessions on the performance of the solitary Endoparasitoid apanteles hemara (Hymenoptera: braconidae) against the amaranth leaf-webber Spoladea recurvalis (Lepidoptera: crambidae) |
| title_sort | effects of pest resistant amaranth accessions on the performance of the solitary endoparasitoid apanteles hemara hymenoptera braconidae against the amaranth leaf webber spoladea recurvalis lepidoptera crambidae |
| topic | allelochemical fitness ipm mortality parasitism |
| url | https://hdl.handle.net/10568/99691 |
| work_keys_str_mv | AT othimsto theeffectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT ramasamys theeffectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT kahuthiagathur theeffectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT duboist theeffectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT ekesis theeffectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT fiaboekkm theeffectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT othimsto effectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT ramasamys effectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT kahuthiagathur effectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT duboist effectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT ekesis effectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae AT fiaboekkm effectsofpestresistantamaranthaccessionsontheperformanceofthesolitaryendoparasitoidapanteleshemarahymenopterabraconidaeagainsttheamaranthleafwebberspoladearecurvalislepidopteracrambidae |