Effect of mineral nutrition and environmental variables on the intensity of wheat spot blotch under rice-wheat system
264 / 186
Authors
-
V. SINGH and R.N. SINGH*
Keywords:
Wheat, Triticum aestivum, host nutrition, spot blotch, Cochliobolus sativus, Bipolaris sorokiniana, environmental variablesAbstract
Experiments were conducted during 2001-02 and 2002-03 to work out the effect of mineral nutrition and environmental variables on the intensity of spot blotch, caused by Cochliobolus sativus (Ito & Kurib.) Drechs. ex Dastur, and grain yield in wheat (Triticum aestivum L. emend. Fiori and Paol.). Mean spot blotch intensity being 38.80% in the first and 38.82% in the second year, environment mediated difference was not apparent at soft dough stage in the timely sown experiment, but at an intensity of 38.19% in the second year over 31.20% in the first, it was very obvious in the late sown one. Environmental variables could not modify the level of spot blotch intensity in timely sown experiment at 120 kg nitrogen, 60 kg phosphorus and 40 kg potash/ha. In the late sown experiment, supplementation of zinc sulphate (21%) and elemental sulphur (32.06%) @ 25 kg/ha each to above NPK dose also gave similar results. Maximum intensity enhancement was noted for 180 kg nitrogen, 60 kg phosphorus and 40 kg potash/ha in the first experiment and zero supplementation of potash, zinc sulphate and elemental sulphur to 120 kg nitrogen and 60 kg phosphorus in the second.
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.