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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2016, Volume : 4, Issue : 6
First page : (180) Last page : (185)
Article doi: http://dx.doi.org/10.18782/2320-7051.2412

Control of Fungal Pathogen Pestalotiopsis disseminata Causing Grey Blight Disease in Som (Persea bombycina Kost.): An In Vitro Study

Manjit Kumar Ray1, Piyush Kumar Mishra2 and Pradip Kumar Baruah3
1SRF, DBT-Biotech Hub, BN College, Dhubri, Assam & PhD scholar, University of Sc. & Tech., Meghalaya-01
2Assistant Professor, Dept. of Botany, BN College, Dhubri, Assam-783324
3HOD & Assoc. Prof., Dept. Of Botany, University of Science & Technology, Meghalaya-793101
*Corresponding Author E-mail: manjit_ray2002@yahoo.com
Received: 29.11.2016 | Revised: 15.12.2016 | Accepted: 18.12.2016 

Som (Persea bombycina Kost. Family-Lauraceae) is the primary host plant of golden silk producing muga silkworm (Antheraea assamensis Helfer), which is effected by one of the major foliar diseases grey blight caused by the fungus Pestalotiopsis disseminata (Thum) Stey. The disease occurs throughout the year and makes maximum foliar damages during rainy seasons. It was recorded that the disease incidence were peak during the month of july in Goalpara district of Assam, India. Four systemic fungicides namely Bavistin, Copper oxychloride, Mancozeb, Topsin-M and five plant extracts of Azadirachta indica, Lantana camara, Eupatorium odoratum, Lucas aspera, Bougainvillea spectabilis were tested at five different concentrations i.e. 1:100(0.01), 5:100(0.05), 10:100(0.10), 15:100(0.15) and 20:100(0.20) for both the control measures in vitro. It showed that in case of systemic fungicides Bavistin and Topsin-M showed complete inhibition of the fungal growth at 10:100 while Mancozeb showed complete inhibition of fungal growth at 20:100 concentration level. Copper oxychloride was found effective at higher concentration. Again among the plant extracts Azadirachta indica showed greater inhibitory effect against the test fungus i.e 95.56% at 20:100 concentration level. While the other plant extracts showed an effective results at higher concentration.
Key words: Som, muga silkworm, grey blight, systemic fungicides, plant extracts, Goalpara district

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Ray, M.K., Mishra, P.K. and Baruah, P.K., Control of Fungal Pathogen Pestalotiopsis disseminata Causing Grey Blight Disease in Som (Persea bombycina Kost.): An In vitro Study, Int. J. Pure App. Biosci.4(6): 180-185 (2016). doi: http://dx.doi.org/10.18782/2320-7051.2412