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Evaluation of Indigenous Fungal Pathogens from Horse Purslane (Trianthema portulacastrum) for Their Relative Virulence and Host Range Assessments to Select a Potential Mycoherbicidal Agent

Published online by Cambridge University Press:  20 January 2017

Puja Ray  and
Lakshmi Sumitra Vijayachandran
Puja Ray*
Affiliation:
Amrita Center for Nanomedicine and Molecular Medicine, AIMS, Ponekkara, Kochi, 41, Kerala, India
Lakshmi Sumitra Vijayachandran
Affiliation:
Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa
*
Corresponding author's E-mail: puja.ray@gmail.com
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Abstract

Periodic surveys were conducted to seek potential indigenous fungal agents for development as mycoherbicides against horse purslane, a major weed of agricultural fields in India. Pathogenic fungal species were isolated and identified from naturally infected horse purslane. The biocontrol potential of these pathogens for horse purslane was evaluated by studying their host range and virulence under growth chamber and greenhouse conditions. Three candidates, Alternaria alternata, Fusarium oxysporum, and Phoma herbarum, were identified as potential candidates for biological control of horse purslane. Preliminary host-range tests and pathogenicity studies, conducted using 45 crop and weed plants belonging to 18 families, demonstrated that P. herbarum provided effective weed control and was safe to most of the plant species tested. Further mycoherbicidal application of P. herbarum as plant spray under field condition caused mortality of horse purslane 60 d after application of the inoculums. Phoma herbarum is a good mycoherbicide candidate against horse purslane.

Keywords

Alternaria alternata (Fr.) KeisslerFusarium oxysporum SchltdlPhoma herbarum Westendorphorse purslane, Trianthema portulacastrum L. TRTPOBioherbicidebiological controlindigenous fungal pathogen
Type
Weed Management
Information
Weed Science , Volume 61 , Issue 4 , December 2013 , pp. 580 - 585
Copyright
Copyright © Weed Science Society of America 

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