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VOL. 6, ISSUE 5 (2021)
Isolation and identification of Hirsutella thompsonii and management of Aceria guerreronis in Machenahalli, Shimoga district, Karnataka, India
Authors
Nafeesa Begum, Shaila M
Abstract
Aceria guerreronis is a serious pest of coconut in India. Investigations were carried out to investigate fungal pathogens infecting the eriophyid mites for their utilisation as biocontrol agents in Karnataka, India. The fungal pathogens namely, Hirsutella thompsonii, Beauveria bassiana, Fusarium semitectum and few opportunistic pathogens namely, Fusarium moniliforme, Cladosporium tennuissimum, Aspergillus niger, Penicillium sp. and Mucor sp. were collected from eriophyid mite populations in different parts of Machenahalli region. Of the total collected nuts, 3.54% were infected by H. thompsonii. The incidence of pathogen infected coconuts in areas with lower temperature and higher humidity. H.thompsonii was isolated from dead cadavers of coconut mite Aceria gurreronis on PDA and SDA media. For further field application the pure culture bought from NBAII, Banglore. The present work with the fungi Hirsutella thompsonii was mass cultured in SMB media weighed mat was tested as biopesticide in different formulations. Three replicates of a spore suspension of 0.5. 0.1, 1.5 and 2g/L sprays were carried out on the three youngest coconuts bunch. H. thompsonii, distilled water and Sabouraud Dextrose broth (2g+2mL+1L) showed reduction of mite population of about 6.29±0.17. When compared all the H. thompsonii treatments along with adjuvant glycerol showed effectiveness in reduction of Aceria guerreronis mite population.
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Pages:342-345
How to cite this article:
Nafeesa Begum, Shaila M "Isolation and identification of <em>Hirsutella thompsonii</em> and management of <em>Aceria guerreronis</em> in Machenahalli, Shimoga district, Karnataka, India ". International Journal of Botany Studies, Vol 6, Issue 5, 2021, Pages 342-345
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