First report of Lasiodiplodia theobromae (Pat.) Griffon & Maubl causing root rot and collar rot disease of physic nut (Jatropha curcas L.) in India

P. Latha; V. Prakasam; A. Kamalakannan; C. Gopalakrishnan; T. Raguchander; M. Paramathma; R. Samiyappan

doi:10.1071/DN09008

RESEARCH ARTICLE

First report of Lasiodiplodia theobromae (Pat.) Griffon & Maubl causing root rot and collar rot disease of physic nut (Jatropha curcas L.) in India

P. Latha ^A , V. Prakasam ^A , A. Kamalakannan ^A , C. Gopalakrishnan ^A ^C , T. Raguchander ^A , M. Paramathma ^B and R. Samiyappan ^A

+ Author Affiliations

- Author Affiliations

^A Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India.

^B Centre of Excellence in Biofuel, Agricultural Engineering College & Research Institute, TNAU, Coimbatore 641 003, Tamil Nadu, India.

^C Corresponding author. Email: pc_gopal@yahoo.co.in

Australasian Plant Disease Notes 4(1) 19-20 https://doi.org/10.1071/DN09008
Submitted: 26 August 2008 Accepted: 28 February 2009 Published: 23 March 2009

Abstract

Physic nut (Jatropha curcas), an important bio-fuel crop grown in the state of Tamil Nadu, India suffered heavy losses due to a root disease in 2007. The symptoms observed were yellowing, drooping and shedding of leaves, blackening and decaying of the collar region of the stem and rotting of the roots. Lasiodiplodia theobromae was isolated consistently from the diseased tissues of affected plants. Pathogenicity of L. theobromae was confirmed by artificial inoculations on 1-year-old plants. This is the first report of root rot and collar rot disease of physic nut in India.

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