ISSN : 0975-5276
EISSN : 0975-9174
GANGAVARAPU SUBRAHMANYAM1*, MAINU KALITA2, DUARAH KRONDASHREE3, MAHANANDA CHUTIA4, RANJANA DAS5
1Department of Pathology, Central Muga Eri Research and Training Institute, Central Silk Board, Ministry of Textiles, Govt. of India, Lahdoigarh, 785700, Jorhat, India
2Department of Pathology, Central Muga Eri Research and Training Institute, Central Silk Board, Ministry of Textiles, Govt. of India, Lahdoigarh, 785700, Jorhat, India
3Department of Pathology, Central Muga Eri Research and Training Institute, Central Silk Board, Ministry of Textiles, Govt. of India, Lahdoigarh, 785700, Jorhat, India
4Department of Pathology, Central Muga Eri Research and Training Institute, Central Silk Board, Ministry of Textiles, Govt. of India, Lahdoigarh, 785700, Jorhat, India
5Department of Pathology, Central Muga Eri Research and Training Institute, Central Silk Board, Ministry of Textiles, Govt. of India, Lahdoigarh, 785700, Jorhat, India
* Corresponding Author : subbugangavarapu@gmail.com
Received : 02-12-2018 Accepted : 27-12-2018 Published : 30-12-2018
Volume : 10 Issue : 12 Pages : 1435 - 1440
Int J Microbiol Res 10.12 (2018):1435-1440
Keywords : Muga silkworm, Antheraea assamensis Helfer, Fungal pathogen, Muscardine disease, Beauveria sp., Asexual stages
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Central Silk Board, Ministry of Textiles, Govt. of India for financial support
Author Contribution : SG designed the study, collected samples, performed experiments, interpreted data, and wrote the paper. KM, KD, CM and DR performed experiments and reviewed the manuscript. DR guided the work
Muga silkworm, Antheraea assamensis Helfer is an economically important sericigenous insect and produces unique golden colour silk. Muga silkworm is endemic to North Eastern States of India. The silkworm is polyphagus, multivoltine and reared outdoor mainly on leaves of Som (Persea bombycina) and Soalu (Litsea monopetala) trees. Since Muga silkworms are reared on outdoor conditions, diseases and pests are the major constraints for enhancing production and productivity. Muscardine or mycosis is a deadly fungal disease occurred mostly in winter crops and thereby causing death of considerable number of Muga silkworm larvae which ultimately affects the cocoon production. Nevertheless, information on characterization and lifecycle of the fungal isolate obtained from muscardien diseased Muga silwkor is obscure. In the present study muscardine (mycosis) infected dead mummified Muga silkworm larvae has been collected and fungus has been isolated (isolate MSFP1). The fungal isolate was cultivated in different media. Asexual reproductive stages of the fungi have been identified as microconidia and blastospores. Different developmental stages of conidiogenous cells and blastospores were documented. Based on the conventional morphological characters and microscopic observations, the fungal isolate MSFP1 has been putatively identified as Beauveria sp. under ‘Hypocreales’ order and ‘Cordycipitaceae’ family.
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