Effect of pre- and post-inoculation exposure of wheat to high temperature and humidity on spot blotch disease (Bipolaris sorokiniana)
157 / 113
Authors
-
V.K. MALIK, D.P. SINGH* and M.S. PANWAR
Abstract
The effect of temperature and relative humidity on development and severity of spot blotch caused by Bipolaris sorokiniana was assessed under artificially inoculated controlled conditions with five isolates by taking susceptible and popular wheat cultivar HD 2329 . The exposure of plants to higher temperature of 35 0C and 95% RH for 24 h at boot leaf stage delayed the appearance of spot blotch symptoms by 6-7 days as compared to those kept at 25 0C and 90% RH. The postinoculation exposure of plants to higher temperature and RH resulted in early development of symptoms by one day in comparison to those exposed before inoculation. The exposure of plants to 35 0C and 95% RH, both at pre- and postinoculation stages reduced the spot blotch score significantly at 18 and 21 days after inoculations as compared to those kept at 25 0C and 90% RH, in case of five isolates and therefore higher temperature is not favourable for spot blotch infection. Amongst five isolates of B. sorokiniana, Bs-4 collected from Karnal was most virulent.
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.