Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests
Dicyphus maroccanus Wagner and Nesidiocoris tenuis Reuter (Hemiptera: Miridae) are 2 biological control agents in tomatoes. Through the crop seasons, a natural shift in the occurrence of both mirids in favor of N. tenuis has been observed at the end of the cropping cycle in eastern Spain. To better...
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| Format: | article |
| Language: | Inglés |
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2018
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| Online Access: | http://hdl.handle.net/20.500.11939/6046 |
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| author | Salas Gervassio, Nadia G. Pérez-Hedo, Mertixell Luna, Maria G. Urbaneja, Alberto |
| author_browse | Luna, Maria G. Pérez-Hedo, Mertixell Salas Gervassio, Nadia G. Urbaneja, Alberto |
| author_facet | Salas Gervassio, Nadia G. Pérez-Hedo, Mertixell Luna, Maria G. Urbaneja, Alberto |
| author_sort | Salas Gervassio, Nadia G. |
| collection | ReDivia |
| description | Dicyphus maroccanus Wagner and Nesidiocoris tenuis Reuter (Hemiptera: Miridae) are 2 biological control agents in tomatoes. Through the crop seasons, a natural shift in the occurrence of both mirids in favor of N. tenuis has been observed at the end of the cropping cycle in eastern Spain. To better optimize their conservation, the reasons for the observed change, such as intraguild interactions (IGP) or the influence of environmental conditions, are worth elucidating. To do this, we first studied the IGP of adult females on heterospecific nymphs in the laboratory. We next studied exploitative competition between adults and nymphs of each species when feeding on Ephestia kueniella Zeller (Lepidoptera: Pyralidae) eggs in the laboratory. Finally, to analyze the competitive displacement between both mirids, we conducted a semifield experiment in which both predators were released together. All experiments were conducted at 2 temperature regimes (20 and 25 degrees C). Adult-to-nymph intraguild interactions occurred only at 25 oC at very low levels, showing that N. tenuis attacked and consumed a greater proportion of heterospecific nymphs. Nesidiocoris tenuis was a better competitor than D. maroccanus when feeding on the shared prey in the presence of its heterospecific nymph at 25 oC. In semifield conditions, N. tenuis showed a competitive advantage over D. maroccanus at both temperatures. We conclude that there is not direct interference between both species, however, N. tenuis has a greater ability to outcompete, since it is best adapted to higher temperatures and it is able to remove food sources for D. maroccanus. |
| format | article |
| id | ReDivia6046 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | ReDivia60462025-04-25T14:46:01Z Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests Salas Gervassio, Nadia G. Pérez-Hedo, Mertixell Luna, Maria G. Urbaneja, Alberto Dicyphus maroccanus Wagner and Nesidiocoris tenuis Reuter (Hemiptera: Miridae) are 2 biological control agents in tomatoes. Through the crop seasons, a natural shift in the occurrence of both mirids in favor of N. tenuis has been observed at the end of the cropping cycle in eastern Spain. To better optimize their conservation, the reasons for the observed change, such as intraguild interactions (IGP) or the influence of environmental conditions, are worth elucidating. To do this, we first studied the IGP of adult females on heterospecific nymphs in the laboratory. We next studied exploitative competition between adults and nymphs of each species when feeding on Ephestia kueniella Zeller (Lepidoptera: Pyralidae) eggs in the laboratory. Finally, to analyze the competitive displacement between both mirids, we conducted a semifield experiment in which both predators were released together. All experiments were conducted at 2 temperature regimes (20 and 25 degrees C). Adult-to-nymph intraguild interactions occurred only at 25 oC at very low levels, showing that N. tenuis attacked and consumed a greater proportion of heterospecific nymphs. Nesidiocoris tenuis was a better competitor than D. maroccanus when feeding on the shared prey in the presence of its heterospecific nymph at 25 oC. In semifield conditions, N. tenuis showed a competitive advantage over D. maroccanus at both temperatures. We conclude that there is not direct interference between both species, however, N. tenuis has a greater ability to outcompete, since it is best adapted to higher temperatures and it is able to remove food sources for D. maroccanus. 2018-05-09T16:30:58Z 2018-05-09T16:30:58Z 2017 article Gervassio, N.G.S., Perez-Hedo, M., Luna, M. G., Urbaneja, A. (2017). Intraguild predation and competitive displacement between nesidiocoris tenuis and dicyphus maroccanus, two biological control agents in tomato pests. Insect Science, 24(5), 809-817. 1672-9609 http://hdl.handle.net/20.500.11939/6046 10.1111/1744-7917.12361 en Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ electronico |
| spellingShingle | Salas Gervassio, Nadia G. Pérez-Hedo, Mertixell Luna, Maria G. Urbaneja, Alberto Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests |
| title | Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests |
| title_full | Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests |
| title_fullStr | Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests |
| title_full_unstemmed | Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests |
| title_short | Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests |
| title_sort | intraguild predation and competitive displacement between nesidiocoris tenuis and dicyphus maroccanus two biological control agents in tomato pests |
| url | http://hdl.handle.net/20.500.11939/6046 |
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