Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies
Abstract The cabbage maggot, Delia radicum (L.), is a serious pest of cruciferous crops in temperate regions of North America and Europe. The effects of undersowing rutabaga, Brassica napus L. subsp. rapifera Metzg. (Brassicaceae), with white clover, Trifolium repens L. (Leguminosae), on second-gene...
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Online Access: | http://dx.doi.org/10.4039/n03-067 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X00001619 |
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crcambridgeupr:10.4039/n03-067 2023-06-11T04:14:12+02:00 Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies Dixon, Peggy L. Coady, Juanita R. Larson, David J. Spaner, Dean 2004 http://dx.doi.org/10.4039/n03-067 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X00001619 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms The Canadian Entomologist volume 136, issue 3, page 427-442 ISSN 0008-347X 1918-3240 Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology journal-article 2004 crcambridgeupr https://doi.org/10.4039/n03-067 2023-05-01T18:20:01Z Abstract The cabbage maggot, Delia radicum (L.), is a serious pest of cruciferous crops in temperate regions of North America and Europe. The effects of undersowing rutabaga, Brassica napus L. subsp. rapifera Metzg. (Brassicaceae), with white clover, Trifolium repens L. (Leguminosae), on second-generation cabbage maggot and its natural enemies were studied in Newfoundland in 1997 and 1998. In 1997, totals of 1311 and 724 eggs were recovered from bare and undersown plots, respectively. More eggs were present in bare plots than undersown plots on various specific dates. In 1997, rutabagas from bare plots weighed more than those from undersown plots, although damage ratings were similar, suggesting that competition, not cabbage maggot feeding, caused the yield differences. In 1998, there were few cabbage maggots present and little damage or yield reduction in either treatment. Similar numbers of cabbage maggot pupae were extracted and reared from each treatment in each year. In 1997, of the pupae reared from undersown plots, 48% produced cabbage maggot flies, 14% produced parasitic Hymenoptera, and 8% produced Aleochara bilineata Gyllenhal (Coleoptera: Staphylinidae); 19% of the pupae from bare plots produced cabbage maggot flies, 8% produced parasitic Hymenoptera, and 36% produced A. bilineata . More A. bilineata were captured in pitfall traps in bare plots than in undersown plots. The effect of clover on carabid beetles was species specific. There were more Bembidion lampros (Herbst) and Amara bifrons (Gyllenhal) in bare plots in 1997, and more Pterostichus melanarius (Illiger) in undersown plots in both years. Despite consistently lower egg numbers in undersown plots than in bare plots, the numbers of pupae in the two treatments were similar at the end of the season. We speculate that this may be due to differential, density-dependent mortality of immature stages of cabbage maggot caused by predators and parasitoids. Article in Journal/Newspaper Newfoundland Cambridge University Press (via Crossref) The Canadian Entomologist 136 3 427 442 |
institution |
Open Polar |
collection |
Cambridge University Press (via Crossref) |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology |
spellingShingle |
Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology Dixon, Peggy L. Coady, Juanita R. Larson, David J. Spaner, Dean Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies |
topic_facet |
Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology |
description |
Abstract The cabbage maggot, Delia radicum (L.), is a serious pest of cruciferous crops in temperate regions of North America and Europe. The effects of undersowing rutabaga, Brassica napus L. subsp. rapifera Metzg. (Brassicaceae), with white clover, Trifolium repens L. (Leguminosae), on second-generation cabbage maggot and its natural enemies were studied in Newfoundland in 1997 and 1998. In 1997, totals of 1311 and 724 eggs were recovered from bare and undersown plots, respectively. More eggs were present in bare plots than undersown plots on various specific dates. In 1997, rutabagas from bare plots weighed more than those from undersown plots, although damage ratings were similar, suggesting that competition, not cabbage maggot feeding, caused the yield differences. In 1998, there were few cabbage maggots present and little damage or yield reduction in either treatment. Similar numbers of cabbage maggot pupae were extracted and reared from each treatment in each year. In 1997, of the pupae reared from undersown plots, 48% produced cabbage maggot flies, 14% produced parasitic Hymenoptera, and 8% produced Aleochara bilineata Gyllenhal (Coleoptera: Staphylinidae); 19% of the pupae from bare plots produced cabbage maggot flies, 8% produced parasitic Hymenoptera, and 36% produced A. bilineata . More A. bilineata were captured in pitfall traps in bare plots than in undersown plots. The effect of clover on carabid beetles was species specific. There were more Bembidion lampros (Herbst) and Amara bifrons (Gyllenhal) in bare plots in 1997, and more Pterostichus melanarius (Illiger) in undersown plots in both years. Despite consistently lower egg numbers in undersown plots than in bare plots, the numbers of pupae in the two treatments were similar at the end of the season. We speculate that this may be due to differential, density-dependent mortality of immature stages of cabbage maggot caused by predators and parasitoids. |
format |
Article in Journal/Newspaper |
author |
Dixon, Peggy L. Coady, Juanita R. Larson, David J. Spaner, Dean |
author_facet |
Dixon, Peggy L. Coady, Juanita R. Larson, David J. Spaner, Dean |
author_sort |
Dixon, Peggy L. |
title |
Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies |
title_short |
Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies |
title_full |
Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies |
title_fullStr |
Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies |
title_full_unstemmed |
Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies |
title_sort |
undersowing rutabaga with white clover: impact on delia radicum (diptera: anthomyiidae) and its natural enemies |
publisher |
Cambridge University Press (CUP) |
publishDate |
2004 |
url |
http://dx.doi.org/10.4039/n03-067 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X00001619 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
The Canadian Entomologist volume 136, issue 3, page 427-442 ISSN 0008-347X 1918-3240 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.4039/n03-067 |
container_title |
The Canadian Entomologist |
container_volume |
136 |
container_issue |
3 |
container_start_page |
427 |
op_container_end_page |
442 |
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1768392039418822656 |