International Journal of Plant Protection

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Variability in Sensitivity among Different Host Origin-Macrophomina phaseolina Isolates to Azoxystrobin Fungicide


Affiliations
1 Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur (Bihar), India
2 Pulses Research Center, Mokama (Bihar), India
3 Jute Research Station, Katihar (Bihar), India
     

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The charcoal rot fungus, Macrophomina phaseolina, was isolated from chickpea, pigeonpea, groundnut and jute ischolar_main tissues collected from Bihar and Uttar Pradesh. Variability in isolates was recognized i.e. feathery growth for pigeonpea and jute isolates, and restricted growth for chickpea and soybean isolates. The sensitivity of M. phaseolina from the four hosts was tested for azoxystrobin, a respiration inhibitor (QoI group) fungicide. The minimum inhibitory concentration was lower (10 ppm) for isolates with restricted growth and higher (between 100 and 150 ppm) for isolates with feathery growth. Concentrations of this fungicide pose significant impact (P < 0.01) on time requirement for growth of isolate. We found strong effectiveness of azoxystrobin to inhibit the growth of slow-growing population of M. phaseolina. Moreover, this fungicide can also exploit for the fast-growing population of M. phaseolina but more time will be required, to act on such isolates, for better result of azoxystrobin. Our results indicate that the response of different isolates varied to concentrations of azoxystrobin; this could be interpreted that the fungicidal application may be performed only after the quantitative estimation of the prevailing population type in the field as because various populations of M. phaseolina may be available in an area. Therefore, our results advocate for judicious use of fungicide (azoxystrobin) application, which ultimate restrict the hazardous impact on soil health.

Keywords

Azoxystrobin, Charcoal Rot, Fungicide, Macrophomina phaseolina.
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  • Variability in Sensitivity among Different Host Origin-Macrophomina phaseolina Isolates to Azoxystrobin Fungicide

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Authors

Abhijeet Ghatak
Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur (Bihar), India
Chanda Kushwaha
Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur (Bihar), India
Ramesh Nath Gupta
Pulses Research Center, Mokama (Bihar), India
Kunal Pratap Singh
Jute Research Station, Katihar (Bihar), India
Mohammad Ansar
Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur (Bihar), India

Abstract


The charcoal rot fungus, Macrophomina phaseolina, was isolated from chickpea, pigeonpea, groundnut and jute ischolar_main tissues collected from Bihar and Uttar Pradesh. Variability in isolates was recognized i.e. feathery growth for pigeonpea and jute isolates, and restricted growth for chickpea and soybean isolates. The sensitivity of M. phaseolina from the four hosts was tested for azoxystrobin, a respiration inhibitor (QoI group) fungicide. The minimum inhibitory concentration was lower (10 ppm) for isolates with restricted growth and higher (between 100 and 150 ppm) for isolates with feathery growth. Concentrations of this fungicide pose significant impact (P < 0.01) on time requirement for growth of isolate. We found strong effectiveness of azoxystrobin to inhibit the growth of slow-growing population of M. phaseolina. Moreover, this fungicide can also exploit for the fast-growing population of M. phaseolina but more time will be required, to act on such isolates, for better result of azoxystrobin. Our results indicate that the response of different isolates varied to concentrations of azoxystrobin; this could be interpreted that the fungicidal application may be performed only after the quantitative estimation of the prevailing population type in the field as because various populations of M. phaseolina may be available in an area. Therefore, our results advocate for judicious use of fungicide (azoxystrobin) application, which ultimate restrict the hazardous impact on soil health.

Keywords


Azoxystrobin, Charcoal Rot, Fungicide, Macrophomina phaseolina.

References