2026-09-21T13:46:35Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/87686 2023-07-11 col_2142_5131 col_2142_34137 com_2142_5130 com_2142_34136 com_2142_397

Steffey, Kevin L. Venditti, Maria Eugenia Del Valle 2015-09-28T16:22:37Z 2015-09-28T16:22:37Z 10000-01-01 1999 1999 In 1997 and 1998, field studies were conducted to evaluate the incidence of natural enemies of European corn borer in Bt cornfields. The findings were compared with assessments of the effects of natural enemies in non-Bt cornfields. In my study, corn type did not seem to affect the percentage of eggs parasitized by Trichogramma, the percentage of larvae parasitized by M grandii, or the percentages of European corn borers infected by the entomopathogens N. pyrausta and B. bassiana. However, densities of natural enemies were significantly reduced in Bt corn compared with non-Bt corn. If large acreages are devoted to the production of Bt corn, the overall impact on specific natural enemies of European corn borer could be significant. Made available in DSpace on 2015-09-28T16:22:37Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9953168.pdf: 4165098 bytes, checksum: 16c760bb9abf50b191a8aace12aa1b31 (MD5) Previous issue date: 1999 Embargo set by: Seth Robbins for item 88967 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community indefinitely during batch ingest of legacy ETDs U of I Only 98 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999. http://hdl.handle.net/2142/87686 (MiAaPQ)AAI9953168 eng Biology, Entomology Impact of Natural Mortality Factors on Populations of the European Corn Borer in Bt- and Non-Bt-Corn Fields in Illinois text Agronomy Agronomy University of Illinois at Urbana-Champaign Dissertation Ph.D.