Manas Kumar Bag | Central Rice Research Institute (original) (raw)

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Papers by Manas Kumar Bag

Journal of Mycopathological Research, 2019

Journal of Mycopathological Research, 2010

Indian Journal of Plant Genetic Resources, 2019

The Journal of Plant Protection Sciences, 2010

Weeds cause heavy loss to the lentil (Lens Lentil variety B 256 (Ranjan) was sown at a row culina... more Weeds cause heavy loss to the lentil (Lens Lentil variety B 256 (Ranjan) was sown at a row culinaris Medikus) crop as they rob the soil of spacing of 25 cm during December 04, 2003 its nutrients and moisture (1). The crop and November 30, 2004. The individual plot competes poorly with many weed species size was 4.0 m x 3.0m. The recommended seed-1 because of its weak stem, short stature, slow rate was 30 kg ha. A uniform fertilizer dose of-1 initial growth and long duration. Weeds in lentil 20:40:20 kg N: P O : K O ha was given as 2 5 2

Indian Journal of Plant Genetic Resources, Sep 1, 2015

Journal of Crop and Weed, 2009

Sheath blight of rice caused by Rhizoctonia solani Kühn is one of the most devastating diseases i... more Sheath blight of rice caused by Rhizoctonia solani Kühn is one of the most devastating diseases in West Bengal. Due to widespread cultivation of susceptible variety Swarna (MTU 7029), the disease has spread in large scale and sometimes cause severe damage even 100% crop loss also occur. Cultural practices combine with spraying fungicides is the most common practice to manage the disease. An attempt was made to evaluate the efficacy of a new fungicidea combination of two systemic fungicides viz., Trifloxystrobin 25% (Strobilurin compound) and Tebuconazole 50% (Triazole compound) alongwith two other commercially available fungicides Hexaconazole and Validamycin under challenge inoculation condition. The new fungicide was most effective in decreasing disease severity (37.61% lower over control) and increasing grain yield (50% higher over control). The same fungicide was also proved as best or at par with leading triazole compound to manage the sheath blight disease of rice at several centre under All India Coordinated Rice Improvement Programme during the year 2006 and 2007.

Indian Journal of Plant Genetic Resources, 2019

Plant Pathology, Feb 24, 2021

Genetic diversity assessment and population structure analysis are essential for characterization... more Genetic diversity assessment and population structure analysis are essential for characterization of pathogens and their isolates. Markers are essential tools for exploring genetic variation among the isolates. False smut of rice caused by Ustilaginoidea virens, formerly Villosiclava virens, is a major emerging disease of rice in India. A high level of variability is observed at the field level, but no information is available from India on genetic diversity and population structure. This is the first report of genetic diversity and population structure of U. virens from India that included 63 isolates distributed across the vast geographical area of eastern and north‐eastern India (18.9 to 26.7°N and 82.6 to 94.2°E). Seventeen RAPDs and 14 SSRs were identified as polymorphic and a total of 140 alleles were detected across the populations. The average number of alleles per locus for each primer was 4.5. All the isolates were grouped into two major clusters, with partial geographical segregation that was supported by principal coordinate analysis. Mantel test suggested genetic distance within the isolates increased with increasing geographical distance. Analysis of molecular variation showed more genetic variation within populations and less among populations. This outcome will help in understanding genetic diversity of U. virens from eastern and north‐eastern India and in planning effective management strategies.

Journal of Phytopathology, Dec 12, 2021

Australasian Plant Pathology, Nov 13, 2021

False smut caused by Ustilaginoidea virens is currently an important disease of rice. The disease... more False smut caused by Ustilaginoidea virens is currently an important disease of rice. The disease regularly occurs in many parts of India resulting in significant economic losses. To find an eco-friendly method of false smut management, the effect of staggered rice sowing and flowering on false smut incidence were evaluated in 2018 and 2019 seasons. Six rice varieties were sown at 15-day intervals from 24th May to 20th August in both the years. Most varieties developed false smut when their flowering occurred during September and October in both seasons of 2018 and 2019 irrespective of their sowing dates. The relative humidity showed positive correlation with Pooja and Sarala but negatively correlated with Anjali , Durga , Geetanjali and Naveen . Therefore, avoiding the flowering period during the critical months can considerably limit the false smut severity and help to manage the disease.

Journal of Crop and Weed, 2010

Journal of Mycopathological Research, 2012

Indian Journal of Plant Genetic Resources, 2019

Indian Journal of Plant Genetic Resources, 2019

Journal of Mycopathological Research, 2010

Microbiological research, 2018

This study is the first time report of utilization of Trichoderma spp. isolated from different tr... more This study is the first time report of utilization of Trichoderma spp. isolated from different tree bark from Odisha state of India for rice crop health management and higher productivity. Six isolates of Trichoderma spp. were identified based on the morphological characteristics and species determination was performed by molecular assays. One of the isolated strains determined as Trichoderma erinaceum outperformed others. Trichoderma erinaceum controlled three soil borne plant pathogens i.e. Rhizoctonia solani, Sclerotium rolfsii and Sclerotium oryzae effectively under controlled condition and R. solani and Helminthosporium oryzae under filed condition. Seed treatments with the formulated isolates improved the germination rate of rice and enhanced vigour. These parameters along with higher chlorophyll content could be related to higher yield observed in two rice varieties; Karuna and Sahabhagidhan. Among the six isolates tested, Trichoderma erinaceum treatment recorded highest yiel...

Annals of Tropical Medicine and Public Health, 2017

Comparative evaluation of loop-mediated isothermal amplification (LAMP) vs qPCR for detection of ... more Comparative evaluation of loop-mediated isothermal amplification (LAMP) vs qPCR for detection of oocysts DNA in mussels., Toxoplasma gondii Experimental (2019), Parasitology

Journal of Mycopathological Research, 2019

Journal of Mycopathological Research, 2010

Indian Journal of Plant Genetic Resources, 2019

The Journal of Plant Protection Sciences, 2010

Weeds cause heavy loss to the lentil (Lens Lentil variety B 256 (Ranjan) was sown at a row culina... more Weeds cause heavy loss to the lentil (Lens Lentil variety B 256 (Ranjan) was sown at a row culinaris Medikus) crop as they rob the soil of spacing of 25 cm during December 04, 2003 its nutrients and moisture (1). The crop and November 30, 2004. The individual plot competes poorly with many weed species size was 4.0 m x 3.0m. The recommended seed-1 because of its weak stem, short stature, slow rate was 30 kg ha. A uniform fertilizer dose of-1 initial growth and long duration. Weeds in lentil 20:40:20 kg N: P O : K O ha was given as 2 5 2

Indian Journal of Plant Genetic Resources, Sep 1, 2015

Journal of Crop and Weed, 2009

Sheath blight of rice caused by Rhizoctonia solani Kühn is one of the most devastating diseases i... more Sheath blight of rice caused by Rhizoctonia solani Kühn is one of the most devastating diseases in West Bengal. Due to widespread cultivation of susceptible variety Swarna (MTU 7029), the disease has spread in large scale and sometimes cause severe damage even 100% crop loss also occur. Cultural practices combine with spraying fungicides is the most common practice to manage the disease. An attempt was made to evaluate the efficacy of a new fungicidea combination of two systemic fungicides viz., Trifloxystrobin 25% (Strobilurin compound) and Tebuconazole 50% (Triazole compound) alongwith two other commercially available fungicides Hexaconazole and Validamycin under challenge inoculation condition. The new fungicide was most effective in decreasing disease severity (37.61% lower over control) and increasing grain yield (50% higher over control). The same fungicide was also proved as best or at par with leading triazole compound to manage the sheath blight disease of rice at several centre under All India Coordinated Rice Improvement Programme during the year 2006 and 2007.

Indian Journal of Plant Genetic Resources, 2019

Plant Pathology, Feb 24, 2021

Genetic diversity assessment and population structure analysis are essential for characterization... more Genetic diversity assessment and population structure analysis are essential for characterization of pathogens and their isolates. Markers are essential tools for exploring genetic variation among the isolates. False smut of rice caused by Ustilaginoidea virens, formerly Villosiclava virens, is a major emerging disease of rice in India. A high level of variability is observed at the field level, but no information is available from India on genetic diversity and population structure. This is the first report of genetic diversity and population structure of U. virens from India that included 63 isolates distributed across the vast geographical area of eastern and north‐eastern India (18.9 to 26.7°N and 82.6 to 94.2°E). Seventeen RAPDs and 14 SSRs were identified as polymorphic and a total of 140 alleles were detected across the populations. The average number of alleles per locus for each primer was 4.5. All the isolates were grouped into two major clusters, with partial geographical segregation that was supported by principal coordinate analysis. Mantel test suggested genetic distance within the isolates increased with increasing geographical distance. Analysis of molecular variation showed more genetic variation within populations and less among populations. This outcome will help in understanding genetic diversity of U. virens from eastern and north‐eastern India and in planning effective management strategies.

Journal of Phytopathology, Dec 12, 2021

Australasian Plant Pathology, Nov 13, 2021

False smut caused by Ustilaginoidea virens is currently an important disease of rice. The disease... more False smut caused by Ustilaginoidea virens is currently an important disease of rice. The disease regularly occurs in many parts of India resulting in significant economic losses. To find an eco-friendly method of false smut management, the effect of staggered rice sowing and flowering on false smut incidence were evaluated in 2018 and 2019 seasons. Six rice varieties were sown at 15-day intervals from 24th May to 20th August in both the years. Most varieties developed false smut when their flowering occurred during September and October in both seasons of 2018 and 2019 irrespective of their sowing dates. The relative humidity showed positive correlation with Pooja and Sarala but negatively correlated with Anjali , Durga , Geetanjali and Naveen . Therefore, avoiding the flowering period during the critical months can considerably limit the false smut severity and help to manage the disease.

Journal of Crop and Weed, 2010

Journal of Mycopathological Research, 2012

Indian Journal of Plant Genetic Resources, 2019

Indian Journal of Plant Genetic Resources, 2019

Journal of Mycopathological Research, 2010

Microbiological research, 2018

This study is the first time report of utilization of Trichoderma spp. isolated from different tr... more This study is the first time report of utilization of Trichoderma spp. isolated from different tree bark from Odisha state of India for rice crop health management and higher productivity. Six isolates of Trichoderma spp. were identified based on the morphological characteristics and species determination was performed by molecular assays. One of the isolated strains determined as Trichoderma erinaceum outperformed others. Trichoderma erinaceum controlled three soil borne plant pathogens i.e. Rhizoctonia solani, Sclerotium rolfsii and Sclerotium oryzae effectively under controlled condition and R. solani and Helminthosporium oryzae under filed condition. Seed treatments with the formulated isolates improved the germination rate of rice and enhanced vigour. These parameters along with higher chlorophyll content could be related to higher yield observed in two rice varieties; Karuna and Sahabhagidhan. Among the six isolates tested, Trichoderma erinaceum treatment recorded highest yiel...

Annals of Tropical Medicine and Public Health, 2017

Comparative evaluation of loop-mediated isothermal amplification (LAMP) vs qPCR for detection of ... more Comparative evaluation of loop-mediated isothermal amplification (LAMP) vs qPCR for detection of oocysts DNA in mussels., Toxoplasma gondii Experimental (2019), Parasitology