NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Experimental Biology (IJEB) >
IJEB Vol.45 [2007] >
IJEB Vol.45(06) [June 2007] >


Title: Effect of Bt-cotton on chrysopids, ladybird beetles and their prey: Aphids and whiteflies
Authors: Mellet, M A
Schoeman, A S
Keywords: Bacillus thuringiensis
Biological control
Predator-prey interactions
Transgenic cotton
Issue Date: Jun-2007
Publisher: CSIR
Abstract: The effect of Bt-cotton, i.e. genetically modified cotton that contain genes expressing -endotoxin, on aphid, whitefly, chrysopid and coccinellid populations was determined with a two-year field study at a cotton farm near Marble Hall, South Africa. Although Bt-cotton is lepidopteran specific, non-lepidopteran arthropod populations may be indirectly influenced by the endotoxin. Abundance of aphid, whitefly, chrysopid and coccinellid populations and predator-prey interactions were used as measures to determine possible effects on the populations under investigation. The cultivation of Bt-cotton had no effect on aphid, whitefly, chrysopid or coccinellid abundance. Positive density dependent interactions occurred between aphids and coccinellids which were not influenced by Bt-cotton. A significant relationship between whitefly and coccinellid abundance, i.e. predator-prey reaction, occurred in the control and sprayed non-Bt cotton fields but was absent from the Bt-cotton fields.
Page(s): 554-562
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Source:IJEB Vol.45(06) [June 2007]

Files in This Item:

File Description SizeFormat
IJEB 45(6) 554-562.pdf214.24 kBAdobe PDFView/Open
 Current Page Visits: 499 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 621626 since 06-Feb-2009  Last updated on 13-Nov-2014Webmaster: nopr@niscair.res.in