Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in Canola
The cabbage seedpod weevil (CSW), <i>Ceutorhynchus obstrictus</i>, an exotic pest accidentally introduced in North America in 1931, spread all over this continent and is now a major pest of canola crops. One of its main natural enemies in Europe, <i>Trichomalus perfectus</i>,...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Insects |
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| Online Access: | https://www.mdpi.com/2075-4450/14/4/327 |
| _version_ | 1797604929999732736 |
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| author | Marie D’Ottavio Sébastien Boquel Geneviève Labrie Eric Lucas |
| author_facet | Marie D’Ottavio Sébastien Boquel Geneviève Labrie Eric Lucas |
| author_sort | Marie D’Ottavio |
| collection | DOAJ |
| description | The cabbage seedpod weevil (CSW), <i>Ceutorhynchus obstrictus</i>, an exotic pest accidentally introduced in North America in 1931, spread all over this continent and is now a major pest of canola crops. One of its main natural enemies in Europe, <i>Trichomalus perfectus</i>, was observed in eastern Canada in 2009. This study aimed to evaluate the landscape influence on CSW infestation and abundance and on <i>T. perfectus</i> parasitism in Quebec to understand the optimal conditions to potentially release this parasitoid in the Canadian Prairies. Field research was conducted in 19 to 28 canola fields per year, from 2015 to 2020, among eight Quebec regions. CSW was sampled by sweep net during canola blooming and parasitoids by collecting canola pods kept in emergence boxes until adults emerge. Infestation and parasitism calculations were based on pod emergence holes. For analysis, 20 landscape predictors were considered. Results show that CSW infestation and abundance increased if there were more roads and cereal crops in the landscapes. Meanwhile, <i>T. perfectus</i> parasitism decreased when hedgerows length and distance from water were longer. However, it increased when landscape diversity and average crop perimeter-to-area ratio were higher, and along with more hay/pastures and soybean crops. This study’s results highlight that these four landscape predictors could provide more resources and overwintering areas, promoting greater efficiency of <i>T. perfectus</i> to control the CSW. |
| first_indexed | 2024-03-11T04:54:49Z |
| format | Article |
| id | doaj.art-2be60e269e5c47c6842df1fa4eb3e2aa |
| institution | Directory Open Access Journal |
| issn | 2075-4450 |
| language | English |
| last_indexed | 2024-03-11T04:54:49Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj.art-2be60e269e5c47c6842df1fa4eb3e2aa2023-11-17T19:45:59ZengMDPI AGInsects2075-44502023-03-0114432710.3390/insects14040327Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in CanolaMarie D’Ottavio0Sébastien Boquel1Geneviève Labrie2Eric Lucas3Laboratoire de Lutte Biologique, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Case Postale 8888, Succursale Centre-Ville, Montréal, QC H3C 3P8, CanadaCentre de Recherche Sur Les Grains Inc. (CÉROM), 740, Chemin Trudeau, Saint-Mathieu-de-Beloeil, QC J3G 0E2, CanadaCentre de Recherche Agroalimentaire de Mirabel (CRAM), 9850, Rue Belle-Rivière, Mirabel, QC J7N 2X8, CanadaLaboratoire de Lutte Biologique, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Case Postale 8888, Succursale Centre-Ville, Montréal, QC H3C 3P8, CanadaThe cabbage seedpod weevil (CSW), <i>Ceutorhynchus obstrictus</i>, an exotic pest accidentally introduced in North America in 1931, spread all over this continent and is now a major pest of canola crops. One of its main natural enemies in Europe, <i>Trichomalus perfectus</i>, was observed in eastern Canada in 2009. This study aimed to evaluate the landscape influence on CSW infestation and abundance and on <i>T. perfectus</i> parasitism in Quebec to understand the optimal conditions to potentially release this parasitoid in the Canadian Prairies. Field research was conducted in 19 to 28 canola fields per year, from 2015 to 2020, among eight Quebec regions. CSW was sampled by sweep net during canola blooming and parasitoids by collecting canola pods kept in emergence boxes until adults emerge. Infestation and parasitism calculations were based on pod emergence holes. For analysis, 20 landscape predictors were considered. Results show that CSW infestation and abundance increased if there were more roads and cereal crops in the landscapes. Meanwhile, <i>T. perfectus</i> parasitism decreased when hedgerows length and distance from water were longer. However, it increased when landscape diversity and average crop perimeter-to-area ratio were higher, and along with more hay/pastures and soybean crops. This study’s results highlight that these four landscape predictors could provide more resources and overwintering areas, promoting greater efficiency of <i>T. perfectus</i> to control the CSW.https://www.mdpi.com/2075-4450/14/4/327parasitism ratebiological controlagroecosystemspatial contextNearctic landscapepest |
| spellingShingle | Marie D’Ottavio Sébastien Boquel Geneviève Labrie Eric Lucas Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in Canola Insects parasitism rate biological control agroecosystem spatial context Nearctic landscape pest |
| title | Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in Canola |
| title_full | Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in Canola |
| title_fullStr | Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in Canola |
| title_full_unstemmed | Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in Canola |
| title_short | Landscape Effects on the Cabbage Seedpod Weevil, <i>Ceutorhynchus obstrictus</i> (Coleoptera: Curculionidae), and on Its Parasitoid, <i>Trichomalus perfectus</i> (Hymenoptera: Pteromalidae), in Canola |
| title_sort | landscape effects on the cabbage seedpod weevil i ceutorhynchus obstrictus i coleoptera curculionidae and on its parasitoid i trichomalus perfectus i hymenoptera pteromalidae in canola |
| topic | parasitism rate biological control agroecosystem spatial context Nearctic landscape pest |
| url | https://www.mdpi.com/2075-4450/14/4/327 |
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