International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2015, Volume : 3, Issue : 6
First page : (168) Last page : (178)
Article doi: http://dx.doi.org/10.18782/2320-7051.2164
Study of fungal diversity with seasonal variation in the Som (Persea bombycina Kost.) plantation area of Goalpara district of Assam, India
Manjit Kumar Ray1*, Piyush Kumar Mishra2, and Pradip Kumar Baruah3
1SRF- Biotech hub, B.N College, Dhubri & Ph.D. Scholar, University of Science & Technology, Meghalaya
2Assistant Professor, Dept. of Botany, B.N College, Dhubri, Assam
3Associate Professor & HOD, Dept. of Botany, Cotton College State University, Guwahati, Assam
*Corresponding Author E-mail: manjit_ray2002@yahoo.com
Abstract
Persea bombycina Kost. Commonly known as Som, is the primary host plant of golden silk producing Muga silkworm (Antheraea assamensis Helfer. ). Muga is very sensitive to the odour of toxic chemicals, temperature & humidity. Muga worms has been dying prematurely for years due to air pollution. Besides pesticides, insecticides & herbicides seasonal change is effecting muga production with food plant. Sands & sediments carried by flood waters covered som bushes up to three to four feet. After the desertification & being affected by stagnant flood water som plant dies within few months. This has been happening for years and most of muga rearing areas are now almost free of this cultivation. Moreover due to climate change outbreaks of various disease causing microbes may occur to the host plants along with other microbes. A study was conducted to study the climatic factor and types of mycoflora present on the som growing areas of Goalpara district during February,2014 to July, 2014. A total of 7 fungal species from air, 12 fungal species from phylloplane, 16 fungal species from rhizosphere and 11 fungal species isolated from non-rhizosphere soil of som plantation area of the study area which show cyclic pattern of occurrence. The major mycoflora which dominates the air, phylloplane, rhizosphere & nonrhizosphere soil of som cultivation area were Rhizopus spp. & Aspergillus spp. The study also reveals that climatic factors such as temperature, humidity & rainfall are also responsible for occurrence of certain mycoflora which effects the Som & ultimately the muga silkworm. Hence recent urbanization, deforestation, pollution & climate changes have all pushed muga silkworm to the danger of declined production & to the very sustenance.
Key words: Persea bombycina, Climatic factors, Seasonal variation, mycoflora, Goalpara.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Ray, M.K., Mishra, P.K. and Baruah, P.K., Study of fungal diversity with seasonal variation in the Som (Persea bombycina Kost. ) plantation area of Goalpara district of Assam, India, Int. J. Pure App. Biosci. 3(6): 168-178 (2015). doi: http://dx.doi.org/10.18782/2320-7051.2164
