Impact of Transgenic Bacillus thuringiensis Corn and Crop Phenology on Five Nontarget Arthropods.
In: Environmental Entomology, Jg. 34 (2005-10-01), Heft 5, S. 1302-1316
Online
academicJournal
Zugriff:
Large-scale field studies were conducted to determine if temporal plantings of Bacillus thuringiensis (Berliner) (Bt) corn (event 176 and Bt11) would affect the seasonal abundance of the following generalist predators: Coleomegilla maculata DeGeer and Cycloneda munda (Say) (Coleoptera: Coccinellidae), Orius insidiosus (Say) (Heteroptera: Anthocoridae), Chrysoperla carnea Stephens (Neuroptera: Chrysopidae), and one specialist parasitoid, Macrocentrus cingulum Brischke (Hymenoptera: Braconidae). Adult populations were monitored using Pherocon AM yellow sticky traps at three locations in Iowa (1996-1998). At each location, a split-plot design was used with Bt and non-Bt corn as main plots and three planting dates as the split plots. Few differences in abundance were observed between Bit and non-Bit corn for the generalist predators studied. However, M. cingulum, a specialist parasitoid of European corn borer, was significantly affected by the presence of Bit corn. Densities of adult M. cingulum were 29-60% lower in Bit corn compared with non-Bit corn. Regression analyses indicated M. cingulum adults were preferentially recruited to and subsequently increased over time in the non-Bit corn treatments at each location within each year. Significant differences were observed among planting dates for all five species. Abundance effects from Bit corn on these natural enemies were not unexpected given the foraging and searching behaviors of different species and their varying levels of dependence on the presence of European corn borer. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Entomology is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
Impact of Transgenic Bacillus thuringiensis Corn and Crop Phenology on Five Nontarget Arthropods.
|
---|---|
Autor/in / Beteiligte Person: | Pilcher, Clinton D. ; Rice, Marlin E. ; Obrycki, John J. |
Link: | |
Zeitschrift: | Environmental Entomology, Jg. 34 (2005-10-01), Heft 5, S. 1302-1316 |
Veröffentlichung: | 2005 |
Medientyp: | academicJournal |
ISSN: | 0046-225X (print) |
DOI: | 10.1093/ee/34.5.1302 |
Schlagwort: |
|
Sonstiges: |
|