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Research Journal of Medicinal Plants
Year: 2012  |  Volume: 6  |  Issue: 1  |  Page No.: 92 - 99

Antiviral Action of Certain Medicinal Plants against AmCPV and their Effect on Cellular and Biochemical Changes in Tasar Silkworm, Antheraea mylitta D.

K.P. Kiran Kumar, G.P. Singh, A.K. Sinha, K.N. Madhusudhan and B.C. Prasad    

Abstract: Among the diseases of tasar silkworm, virosis caused by Cytoplasmic Polyhedrosis Virus (CPV) is highly contagious and more prevalent. Thirteen antiviral plants were used to test their efficacy against Antherae mylitta cytoplasmic polyhedrosis virus (AmCPV) in tasar silkworm. The aqueous extracts of these plants in different concentrations were used for containment of virosis in virus-infected silkworm and mortality was recorded. The influence of best three phytoextracts which have shown good results in suppressing virosis were subjected for the study of cellular and biochemical changes. Two percent aqueous extracts of Aloe barbedensis (AKP 3), P. corylifolia (AKP13) and Bougainvillea spectabilis (AKP 9) were found more effective in suppressing the virosis and reduced the mortality due to virus infection of 66.17, 64.47 and 57.19%, respectively. The total hemocyte count increased up to 6th day of post inoculation in phytoextract treated batches while in the inoculated control the increase was within 3 days indicating the positive hemocyte mediated response in silkworm treated with phytoextract. The hemolymph protein in Aloe barbedensis treated silkworm (35.27 mg mL-1) was significantly higher than inoculated control (20.25 mg mL-1). The gradual increase of total hemolymph proteins from 1st day (16.31 mg mL-1) to 8th day (33.73 mg mL-1) was observed in healthy control where as in inoculated control increasing trend was observed from day 1 (16.26 mg mL-1) to day 3 (24.22 mg mL-1) there after decreasing trend was observed and finally reached to 20.25 mg mL-1 (8th day). The plant extract of Aloe barbedensis (AKP 3) is more effective in suppressing virosis based on the results of mortality reduction against virosis cellular and biochemical changes.

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