Effective use of activated potassium salt of long chain phosphorous (96%) for the control of fungicide resistant Plasmopara viticola causing downy mildew in grapes

Authors

  • S.D. SAWANT, M.R. GHULE, R.M. SAVARDEKAR INDU S. SAWANT and SUJOY SAHA*

Keywords:

Bioefficacy, low profile chemical, fungicide resistance, downy mildew, grapes

Abstract

Grape is one of the important commercial fruit crops of India and is severely affected by downy mildew disease caused by Plasmopara viticola which might cause total crop loss under favourable conditions. Synthetic fungicides belonging to groups Quinone outside Inhibitors (QoI), Carboxylic Acid Amides (CAA), phenyl amides (PA), Cyanoacetamide-oxime, are commonly used for the control of downy mildew in India, alone or in combination with non systemic fungicides viz. dithiocarbamates, and copper based fungicides. P. viticola is high risk pathogen for its ability to develop resistance against fungicides. Resistance to QoI, CAA, and phenyl amide group fungicides were detected in India and other vineyards of various countries. Therefore it is necessary to strategize alternative safe methods for disease control. A commercial formulation containing activated potassium salt of long chain phosphorous 96% (APSP 96%), was evaluated in vitro against fungicide resistant isolates of P. viticola and in field during the fruiting season of October to April 2014-15 at Nashik and Sangli locations in Maharashtra against downy mildew. It was found that the APSP 96% used solo and when tank-mixed with mancozeb, significantly reduced downy mildew incidence on leaves and bunches in grapes as compared to untreated control and can be safely used in vineyards to prevent the buildup of fungicide resistant population and effective disease management.

Downloads

Issue

Vol. 69 No. 4s (2016): Indian Phytopathology : Special Issue

Section

Research Articles

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.

How to Cite

INDU S. SAWANT and SUJOY SAHA*, S. S. M. G. R. S. (2016). Effective use of activated potassium salt of long chain phosphorous (96%) for the control of fungicide resistant Plasmopara viticola causing downy mildew in grapes. Indian Phytopathology, 69(4s), 338-344. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/71322