Studies on a sap transmissible virus associated with mosaic disease of cowpea
166
Authors
-
N. NAGARAJU and K.V. KESHAVA MURTHY
Department of Plant Pathology, University of Agricultural Sciences, Bangalore 560 065
Keywords:
Cow pea, cucumber mosaic virus, characterisation, Myzus persicae, Aphis craccivoraAbstract
A mosaic disease of cowpea Vigna unguiculata (L.) Walp. characterised by systemic mosaic with dark and light green patches on the fully expanded leaves and dark green vein-banding was investigated. The causal virus was found to be transmissible by sap, seed and two species of aphids viz., Aphis craccivora and Myrus persicae. The virus had a dilution end point of I: 1000 - I :5000, thermal inactivation point between 60°- 65°C and longevity in vitro of 24 to 48 hr at room temperature (23°-25°C) and 7 days (165 hr) at refrigerated temperature (14°C). The host range of the virus was restricted to 9 only out of 41 hosts tested. The virus produced chlorotic spot and thickening along veins in Cucurbita moschata and Luffa acutangula, systemic mosaic in Cajanus cajan, Cyamopsis tetragonaloba, Phaseolus aureus and Phaseolus vulgaris, chlorotic local lesions on Chenopdoium amaranticolor and C. quinoa and systemic necrosis on Dolichos biflorus . The virus was identified as a cowpea strain of cucumber mosaic virus (CMV).
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.