Disease reaction of newly introduced Bt transgenic cotton hybrids in South-west region of Punjab
225 / 118
Authors
-
M.S. YADAV*
Abstract
Six Bt cotton hybrids viz., RCH 134 Bt, RCH 317 Bt, MRC 6301 Bt, MRC 6304 Bt, Ankur 651 Bt and Ankur 2534 Bt were field evaluated against diseases during Kharif 2004 and 2005. All the Bt cotton hybrids were found significantly superior than non- Bt variety, F 846 (control) in reducing diseases like cotton leaf curl virus (CLCuV), bacterial blight (BB) and fungal foliar leaf spots (FFLS). However, the parawilt and Tirak incidence was noticed only in Bt hybrids. MRC 6304 Bt remained free from diseases. The disease indices of CLCuV (2.7%) on RCH 134 Bt and BB (2.4%) on RCH 317 Bt were significantly higher than others hybrids. Disease indices (0.2-2.8%) of FFLS were also recorded in Bt hybrids. The Parawilt incidences were maximum in Ankur 2534 Bt (2.6%) and Ankur 651 Bt (2.8%) during 2004 and 2005, respectively. Tirak has also shown occurrence (0.1-1.0% incidence) on Bt hybrids in the end of the season 2005.
Downloads
Issue
Section
License
For Authors
As soon as an article is accepted for publication, authors are requested to assign copyright of the article (or to grant exclusive publication and dissemination rights) to the publisher (Indian Phytopathlogical Society). This will ensure the widest possible protection and dissemination of information.
For Readers
While the advice and information in this journal is believed to be true and accurate at the date of its publication, the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may have been made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
All articles published in this journal are protected by copyright, which covers the exclusive rights to reproduce and distribute the article (e.g., as offprints), as well as all translation rights. No material published in this journal may be reproduced photographically or stored on microfilm, in electronic data bases, on video disks, etc., without first obtaining written permission from the publisher. The use of general descriptive names, trade names, trademarks, etc. in this publication, even if not specifically identified, implies that these names are protected by the relevant laws and regulations.