Responses of Cereal Aphids and Their Parasitic Wasps to Landscape Complexity. Issue 2 (13th September 2014)
- Record Type:
- Journal Article
- Title:
- Responses of Cereal Aphids and Their Parasitic Wasps to Landscape Complexity. Issue 2 (13th September 2014)
- Main Title:
- Responses of Cereal Aphids and Their Parasitic Wasps to Landscape Complexity
- Authors:
- Zhao, Zi-Hua
Hui, Cang
Hardev, Sandhu
Ouyang, Fang
Dong, Zhaoke
Ge, Feng - Abstract:
- Abstract : The intensification of agriculture has caused a decline in the complexity of agricultural landscapes because of the expansion of arable lands and the removal of natural habitats. These landscape changes, which have substantial effects on natural enemies (e.g., parasitoids) and on biological control services, have received considerable attention recently. In the current study, we analyzed the effects of landscape complexity on cereal aphids and their parasitic wasps in 24 sites during a period of 3 yr. In total, 11 primary parasitoid species and 6 hyperparasitoid species, comprising 5, 220 individuals, were collected in our experiments. With the exception of two primary parasitic wasps ( Trioxys asiaticus Telenga and Toxares sp.) and one hyperparasitic wasp ( Dendrocerus carpenteri [Curtis]), most species were sensitive to landscape complexity after ≥1 yr. Species diversity, primary parasitism, and hyperparasitism increased with increasing landscape complexity. However, the relationship between the population density of active primary parasitoids (effective primary parasitoids) and landscape complexity was indicated by a quadratic function, not a linear function. The effective population density of primary parasitoids was maximal (2.04 individuals per 100 wheat stems) if the percentage of noncrop habitat was 38%. The hypothesis that landscape complexity may enhance the activity or higher diversity of primary parasitoids and hyperparasitoids was well-supported byAbstract : The intensification of agriculture has caused a decline in the complexity of agricultural landscapes because of the expansion of arable lands and the removal of natural habitats. These landscape changes, which have substantial effects on natural enemies (e.g., parasitoids) and on biological control services, have received considerable attention recently. In the current study, we analyzed the effects of landscape complexity on cereal aphids and their parasitic wasps in 24 sites during a period of 3 yr. In total, 11 primary parasitoid species and 6 hyperparasitoid species, comprising 5, 220 individuals, were collected in our experiments. With the exception of two primary parasitic wasps ( Trioxys asiaticus Telenga and Toxares sp.) and one hyperparasitic wasp ( Dendrocerus carpenteri [Curtis]), most species were sensitive to landscape complexity after ≥1 yr. Species diversity, primary parasitism, and hyperparasitism increased with increasing landscape complexity. However, the relationship between the population density of active primary parasitoids (effective primary parasitoids) and landscape complexity was indicated by a quadratic function, not a linear function. The effective population density of primary parasitoids was maximal (2.04 individuals per 100 wheat stems) if the percentage of noncrop habitat was 38%. The hypothesis that landscape complexity may enhance the activity or higher diversity of primary parasitoids and hyperparasitoids was well-supported by our study. However, the hyperparasitoids had a more sensitive response to landscape complexity than the primary parasitoids. Further studies should aim to enhance the biological pest control of primary parasitoids and suppress hyperparasitoids by habitat manipulation. This technique could be used effectively for pest management in mosaic landscapes through habitat rearrangement and reorganization. … (more)
- Is Part Of:
- Journal of economic entomology. Volume 107:Issue 2(2014)
- Journal:
- Journal of economic entomology
- Issue:
- Volume 107:Issue 2(2014)
- Issue Display:
- Volume 107, Issue 2 (2014)
- Year:
- 2014
- Volume:
- 107
- Issue:
- 2
- Issue Sort Value:
- 2014-0107-0002-0000
- Page Start:
- 630
- Page End:
- 637
- Publication Date:
- 2014-09-13
- Subjects:
- biological control -- hyperparasitism -- mosaic landscape -- noncrop habitat -- primary parasitism
Beneficial insects -- Periodicals
Insect pests -- Periodicals
632.7 - Journal URLs:
- http://jee.oxfordjournals.org/ ↗
http://www.oxfordjournals.org ↗ - DOI:
- 10.1603/EC13054 ↗
- Languages:
- English
- ISSNs:
- 0022-0493
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4973.000000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 12755.xml