Management of damping-off disease of opium poppy
480 / 863
Authors
-
M. ALAM, A. SATTAR and K.K. JANARDHANAN
Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Lucknow 226 015
Keywords:
Opium poppy, damping-off, Pythium dissotocum, chemical control, host resistanceAbstract
The efficacy of 5 fungicide treatments, metalaxyl + mancozeb, fosetyl-Al [fosetyl], captan, propamocarb hydrochloride [propamocarb] and triadimefon, was tested in vitro against the growth of Pythium dissotocum causing damping-off of opium poppy (Papaver somniferum). Metalaxyl + mancozeb was highly effective, showing 50% growth inhibition at 7鎔/ml a.i. of both the constituents. Seed treatment with the same fungicide at 0.12 g.a.i./100 g seed (cv. Shyama) gave 100% disease control, with seedling emergence equivalent to steam sterilized soil. Seed treatment with captan at 0.3% or soil drenching with propamocarb hydrochloride at 0.3% were the next most effective treatments showing 75% seedling emergence as compared with 2.7% seedling emergence in the untreated control. In pathogenicity tests on 5 varieties and 11 mutants of opium poppy under glasshouse conditions, variety IS-42 and mutant S-102 were highly resistant to damping-off. It is concluded that damping-off of opium poppy could be effectively managed either by seed treatment with metalaxyl + mancozeb or by the use of resistant varieties.
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.