VEGETOS: An International Journal of Plant ResearchOnline ISSN: 2229-4473
Print ISSN: 0970-4078

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Research Article, Vegetos Vol: 30 Issue: 2

Effect of Climatic Parameters on Persistence of Metarhizium anisopliae

Pranab Dutta1*, Himadri Kaushik1**, H. Singh2, R P Bhuyan3, DJ Nath4 and KC Puzari1

1Department of Plant Pathology, Assam Agricultural University, Jorhat-785013, Assam, India

2Department of Entomology, Gochar Mahavidyalaya, Saharnapur-247451, U.P., India

3Department of Tea Husbandry and Technology, Assam Agricultural University, Jorhat-785013, Assam, India

4Department of Soil Science, Assam Agricultural University, Jorhat-785013, Assam, India

*Corresponding Authors : Pranab Dutta
Department of Plant Pathology, Assam Agricultural University, Jorhat-785013, Assam, India
E-mail: pranabdutta74@gmail.com

Himadri Himadri Kaushik
Department of Plant Pathology, Assam Agricultural University, Jorhat-785013, Assam, India
E-mail: himadrikaushik18@gmail.com

Received: March 13, 2017 Accepted: April 11, 2017 Published: April 14, 2017

Citation: Dutta P, Kaushik H, Singh H, Bhuyan RP, Nath DJ, et al. (2017) Effect of Climatic Parameters on Persistence of Metarhizium anisopliae. Vegetos 30:2. doi: 10.5958/2229-4473.2017.00135.5

Abstract

Effect of Climatic Parameters on Persistence of Metarhizium anisopliae

The work has been done on the study related to the persistence of a potential entomopathogen Metarhizium anisopliae outside of their insect host as there is little or no knowledge about the biology. To resolve this question, the study was conducted in organic and inorganic tea ecosystem of Assam. Results have shown that the entomopathogen remained viable and detectable for 1 year and a month in both soil and air in inorganic tea ecosystem. While it was detectable for 1 year and a month in soil and for approximately 12 months in air in organic tea ecosystem, with negative periods between. M. anisopliae this did not persist as epiphyte in the vegetative cover of both the tea ecosystem even for a month after its application. However, its persistence is highly depended upon all the environmental parameters namely temperature, rainfall, humidity, BSSH, evaporation and wind speed. Moreover, soil biological and physico-chemical properties like soil pH, available NPK, exchangeable cations, soil organic carbon and microbial biomass carbon were found to be increased after its application in the studied area. The results of this study showed that the population of M. anisopliae has the potential of accumulating in the soil and air under proper environmental conditions. Conidia present in these areas decay after one year so, fungal spraying must be done accordingly to achieve a better control. We could not able to detect positive colonies of M. anisopliae as an epiphyte in the vegetative cover of the studied area. If conidia are applied on the abaxial surface of leaves, persistence of the entomopathogen could be enhanced on phylloplanes...

Keywords: Ecosystem; Metarhizium; Tea; Persistence; Phylloplanes; Viability

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