EFFICACY OF MEDICINAL PLANT EXTRACTS AGAINST COLLAR ROT OF TOMATO CAUSED BY Sclerotium rolfsii (Sacc.)

A. MAHATO¹*, M.K. BISWAS², S. PATRA^3
1Department of Plant Protection, Palli-Siksha Bhavana, Visva-Bharati, Sriniketan, West Bengal, 731236, India
²Department of Plant Protection, Palli-Siksha Bhavana, Visva-Bharati, Sriniketan, West Bengal, 731236, India
³Department of Plant Protection, Palli-Siksha Bhavana, Visva-Bharati, Sriniketan, West Bengal, 731236, India
* Corresponding Author : asishmahato1989@gmail.com

Received : 15-05-2018     Accepted : 27-05-2018     Published : 30-05-2018
Volume : 10     Issue : 5       Pages : 1224 - 1227
Int J Microbiol Res 10.5 (2018):1224-1227
DOI : http://dx.doi.org/10.9735/0975-5276.10.5.1224-1227

Keywords : Tomato, Collar Rot, Sclerotium rolfsii, Medicinal Plant Extracts, Management
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to Visva-Bharati, Institute of Agriculture, Sriniketan, West Bengal, 731236, India
Author Contribution : All author equally contributed

Eight medicinal plant extracts viz. Andrographis paniculata, Zingiber officinale, Azadirachta indica, Allium sativum, Curcuma longa, Catharanthus roseus, Allium cepa and Ocimum sanctum were evaluated against S. rolfsii by following poisoned food technique at 5, 10 and 20 per cent concentration in vitro and the effective concentration were also evaluated against collar rot in vivo. Among of them Allium sativum was showed maximum inhibition of 35.31 %, 68.50 % and 84.89 % of mycelia growth at 5, 10, and 20 percent concentration respectively followed by Azadirachta indica (31.67%, 65.61% and 80.86%). The least effective phytoextract was Ocimum sanctum and exhibited 10.67 %, 30.69% and 53.47 % inhibition of mycelial growth at 5, 10, and 20 percent concentration respectively. Where as in vivo experiments with 20 % concentration, Azadirachta indica showed best effectiveness against collar rot disease by reducing 64.69 % and 67.26 % disease incidence respectively followed by Allium sativum (60.34% and 62.65%) and least reduction of disease incidence (29.38% and 25.30%) respectively recorded in Ocimum sanctum in two years of experiments.

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