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Phyllosphere is one of the major microbial habitat on the earth that provides shelter to diverse and
complex microbial communities . Phylloplane microorganisms influence the growth of their host plants ,
either negatively as pathogens or positively by increasing the stress tolerance and disease resistance. A
comparative study was conducted on the Muga silk worm (Antheraea assamensis Helfer) , host plants
Som (Persea bombycina King ex Hook. f. Kosterm) and Sualu (Listea polyantha Juss.) from Goalpara
district , Assam during the winter season. A total of 10 species of fungi were isolated and identified on the
basis of colony morphology, mycelia, sporangiophore and spore structure from different groups. Among
all the species the dominant fungal genera on both the P. bombycina and L. polyantha phylloplane were
the Rhizopus species which were present in mature leaves. The other genera includes Mucor, Alternaria,
Cladosporium, Trichoderma, Penicillium, Cercospora, Curvularia, Aspergillus and Verticillium. The
results clearly indicates that fungal species belongs to class Zygomycetes and Deuteromycetes actively
colonize on P. bombycina and L. polyantha phylloplane.
Keywords: Phylloplane, Antheraea assamensis, Persea bombycina , Listea polyantha, Goalpara district.