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Papers by subhankar banerjee
Forest Pathology, 2020
In 2016-2017, 100 candidate trees (CTs) were selected on the basis of superior height, clear bole... more In 2016-2017, 100 candidate trees (CTs) were selected on the basis of superior height, clear bole, diameter at breast height (DBH), branch angle, forking and crown shape. Based on an index method of selection, 25 candidate plus trees (CPTs) were selected for evaluation of genetic value through multilocation trials. In 2017, seeds from 25 CPTs were collected across Haryana,
The primary mechanisms of plant disease suppression by biological control agents are by productio... more The primary mechanisms of plant disease suppression by biological control agents are by production of antimicrobial secondary metabolites like siderophores, antibiotics, volatile substances etc. Siderophores are low molecular iron chelating compounds produced by fungi and bacteria under iron stress condition. The present study is focused on the detection, estimation and characterisation of siderophores from different soil borne fungal biocontrol agents like Trichoderma spp., Beauveria spp. and Metarhizium spp. Isolates of Trichoderma have shown positive results in CAS agar plate whereas Beauveria and Metarhizium have shown negative results. The isolates with positive results were opted for characterization and quantitative estimation of siderophore. T. harzianum produced a maximum percentage of siderophore (85.00%), followed by T. viride (65.50%), T. asperellum (60.27%) and T. longibrachiatum (45.50%). While studying the typification of siderophores, it was found that T. harzianum r...
Indian journal of applied research, 2016
A destructive leaf blight disease of Ocimum sanctum L. is foundin West Bengal. It’s causal organi... more A destructive leaf blight disease of Ocimum sanctum L. is foundin West Bengal. It’s causal organism was isolated and phenotypically identified as Alternaria sp. Once in a week survey for two consecutive years of 2013 and 2014 in ten places of 24 Parganas(N) district,West Bengal establishes the presence of disease in all ten places. PDI was recorded by monitoring it’s cultivation at 4 selected areas of and adjoining North 24 Parganas, West Bengal for the same time period.Maximum PDI (44.61%-76.66%) was between July to September and minimum (12.30-37.50 %) was recorded during December – January in all four studied areas. There was not only any significant report of fungal disease on Ocimum sanctum but also this is the first approach to the study of disease intensity of leaf blight disease of Ocimum sanctum all over the world. So our work is an entirely new one in this regard.
Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot... more Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot disease in this plant is recently observed in West Bengal, India. It’s causal organism was isolated and phenotypically identified as Alternaria and molecular identification (ITS 15.8sITS2) shows as Alternaria brassicae (Berk.) Sacc. This is the first report of the leaf spot disease on Aloe vera in West Bengal. Once in a week survey was conducted to note the occurrence of this disease throughout the year of 2013 in ten places of 24 Parganas District, West Bengal. In all ten places, this disease was present from January – December, 2013. Intensive research was conducted in order to record the disease intensity by monitoring Aloe cultivation at 4 selected areas of West Bengal throughout this year. The disease intensity was recorded maximum during July (95.71%) in State Pharmacopical Laboratory and Pharmacy for Medicine, Govt. of W.B, April in Nilgunj (95.45%), May at Rajarhat (87.77%), Jun...
Cultivation of mulberry ( Morus sp) and rearing of silkworm ( Bombyx mori ) are the basis of seri... more Cultivation of mulberry ( Morus sp) and rearing of silkworm ( Bombyx mori ) are the basis of sericulture industry as the major source of nutrition for silkworm depends on leaves of mulberry plants. Mulberry is affected by various pests like fungi, bacteria, virus and nematodes. Among the fungal diseases, leaf spot disease caused by Cercospora moricola , powdery mildew by Phyllactinea corylea , leaf black rust by Cerotelium fici , red rust by Aecidium mori , twig blight by Fusarium pallidoroseum , root rot by Resellinia necatrix and Helicobasidiwum mompa , stem canker and die back by Botryodiplodia theobromae , stem rot by Polyporus hispidus and Ganoderma applanatum , collar rot by Phoma mororum , stem blight by Phoma exigua and bud blight by Fusarium lateritium are well known from different parts of the world. Among these diseases, Cercospora moricola , Phyllactinea corylea , Cerotelium fici , Aecidium mori , Botryodiplodia theobromae and Fusarium pallidoroseum are most dominant fun...
Four species of Amanita were collected from lateritic region of West Bengal during the field trip... more Four species of Amanita were collected from lateritic region of West Bengal during the field trips of 2008-2009. One of the collected species Amanita vaginata was previously reported from this region; however three fungal species including. A. vaginata , A. vaginata var . Alba and A. banningiana are reported as new which were considered edible by the local residents.
PloS one, 2018
Aloe vera (L.) Burm.f. is a highly important and extensively cultivated medicinal plant and that ... more Aloe vera (L.) Burm.f. is a highly important and extensively cultivated medicinal plant and that is also extensively used in the cosmetic industry. It has been frequently reported to suffer from Alternaria leaf spot disease in various parts of the world. Various fungicides used to combat this disease, have deleterious effects on the environment and on pharmacologically important constituents of Aloe vera. To avoid the harmful effects of fungicides an ecofriendly approach has been adopted here. A weekly survey was conducted during 2013-2015 in and around North 24 Parganas (West Bengal) to obtain the percentage of disease index (PDI). For biological control of the disease, screening of the antagonistic efficacy of biocontrol agents was carried out through the in vitro dual-culture-plate method and scanning electron microscopy (SEM) was used to study the mechanism. The in vitro effects of fungicides on the radial growth of the pathogen were evaluated through the poison food method and ...
European Journal of Biotechnology and Bioscience, 2014
Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot... more Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot disease in this plant is recently observed in West Bengal, India. It’s causal organism was isolated and phenotypically identified as Alternaria and molecular identification (ITS 1- 5.8s- ITS2) shows as Alternaria brassicae (Berk.) Sacc. This is the first report of the leaf spot disease on Aloe vera in West Bengal. Once in a week survey was conducted to note the occurrence of this disease throughout the year of 2013 in ten places of 24 Parganas District, West Bengal. In all ten places, this disease was present from January – December, 2013. Intensive research was conducted in order to record the disease intensity by monitoring Aloe cultivation at 4 selected areas of West Bengal throughout this year. The disease intensity was recorded maximum during July (95.71%) in State Pharmacopical Laboratory and Pharmacy for Medicine, Govt. of W.B, April in Nilgunj (95.45%), May at Rajarhat (87.77%),...
Forest Pathology, 2020
In 2016-2017, 100 candidate trees (CTs) were selected on the basis of superior height, clear bole... more In 2016-2017, 100 candidate trees (CTs) were selected on the basis of superior height, clear bole, diameter at breast height (DBH), branch angle, forking and crown shape. Based on an index method of selection, 25 candidate plus trees (CPTs) were selected for evaluation of genetic value through multilocation trials. In 2017, seeds from 25 CPTs were collected across Haryana,
The primary mechanisms of plant disease suppression by biological control agents are by productio... more The primary mechanisms of plant disease suppression by biological control agents are by production of antimicrobial secondary metabolites like siderophores, antibiotics, volatile substances etc. Siderophores are low molecular iron chelating compounds produced by fungi and bacteria under iron stress condition. The present study is focused on the detection, estimation and characterisation of siderophores from different soil borne fungal biocontrol agents like Trichoderma spp., Beauveria spp. and Metarhizium spp. Isolates of Trichoderma have shown positive results in CAS agar plate whereas Beauveria and Metarhizium have shown negative results. The isolates with positive results were opted for characterization and quantitative estimation of siderophore. T. harzianum produced a maximum percentage of siderophore (85.00%), followed by T. viride (65.50%), T. asperellum (60.27%) and T. longibrachiatum (45.50%). While studying the typification of siderophores, it was found that T. harzianum r...
Indian journal of applied research, 2016
A destructive leaf blight disease of Ocimum sanctum L. is foundin West Bengal. It’s causal organi... more A destructive leaf blight disease of Ocimum sanctum L. is foundin West Bengal. It’s causal organism was isolated and phenotypically identified as Alternaria sp. Once in a week survey for two consecutive years of 2013 and 2014 in ten places of 24 Parganas(N) district,West Bengal establishes the presence of disease in all ten places. PDI was recorded by monitoring it’s cultivation at 4 selected areas of and adjoining North 24 Parganas, West Bengal for the same time period.Maximum PDI (44.61%-76.66%) was between July to September and minimum (12.30-37.50 %) was recorded during December – January in all four studied areas. There was not only any significant report of fungal disease on Ocimum sanctum but also this is the first approach to the study of disease intensity of leaf blight disease of Ocimum sanctum all over the world. So our work is an entirely new one in this regard.
Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot... more Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot disease in this plant is recently observed in West Bengal, India. It’s causal organism was isolated and phenotypically identified as Alternaria and molecular identification (ITS 15.8sITS2) shows as Alternaria brassicae (Berk.) Sacc. This is the first report of the leaf spot disease on Aloe vera in West Bengal. Once in a week survey was conducted to note the occurrence of this disease throughout the year of 2013 in ten places of 24 Parganas District, West Bengal. In all ten places, this disease was present from January – December, 2013. Intensive research was conducted in order to record the disease intensity by monitoring Aloe cultivation at 4 selected areas of West Bengal throughout this year. The disease intensity was recorded maximum during July (95.71%) in State Pharmacopical Laboratory and Pharmacy for Medicine, Govt. of W.B, April in Nilgunj (95.45%), May at Rajarhat (87.77%), Jun...
Cultivation of mulberry ( Morus sp) and rearing of silkworm ( Bombyx mori ) are the basis of seri... more Cultivation of mulberry ( Morus sp) and rearing of silkworm ( Bombyx mori ) are the basis of sericulture industry as the major source of nutrition for silkworm depends on leaves of mulberry plants. Mulberry is affected by various pests like fungi, bacteria, virus and nematodes. Among the fungal diseases, leaf spot disease caused by Cercospora moricola , powdery mildew by Phyllactinea corylea , leaf black rust by Cerotelium fici , red rust by Aecidium mori , twig blight by Fusarium pallidoroseum , root rot by Resellinia necatrix and Helicobasidiwum mompa , stem canker and die back by Botryodiplodia theobromae , stem rot by Polyporus hispidus and Ganoderma applanatum , collar rot by Phoma mororum , stem blight by Phoma exigua and bud blight by Fusarium lateritium are well known from different parts of the world. Among these diseases, Cercospora moricola , Phyllactinea corylea , Cerotelium fici , Aecidium mori , Botryodiplodia theobromae and Fusarium pallidoroseum are most dominant fun...
Four species of Amanita were collected from lateritic region of West Bengal during the field trip... more Four species of Amanita were collected from lateritic region of West Bengal during the field trips of 2008-2009. One of the collected species Amanita vaginata was previously reported from this region; however three fungal species including. A. vaginata , A. vaginata var . Alba and A. banningiana are reported as new which were considered edible by the local residents.
PloS one, 2018
Aloe vera (L.) Burm.f. is a highly important and extensively cultivated medicinal plant and that ... more Aloe vera (L.) Burm.f. is a highly important and extensively cultivated medicinal plant and that is also extensively used in the cosmetic industry. It has been frequently reported to suffer from Alternaria leaf spot disease in various parts of the world. Various fungicides used to combat this disease, have deleterious effects on the environment and on pharmacologically important constituents of Aloe vera. To avoid the harmful effects of fungicides an ecofriendly approach has been adopted here. A weekly survey was conducted during 2013-2015 in and around North 24 Parganas (West Bengal) to obtain the percentage of disease index (PDI). For biological control of the disease, screening of the antagonistic efficacy of biocontrol agents was carried out through the in vitro dual-culture-plate method and scanning electron microscopy (SEM) was used to study the mechanism. The in vitro effects of fungicides on the radial growth of the pathogen were evaluated through the poison food method and ...
European Journal of Biotechnology and Bioscience, 2014
Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot... more Aloe vera (L.) Burm.f. is a medicinally and commercially important plant. A destructive leaf spot disease in this plant is recently observed in West Bengal, India. It’s causal organism was isolated and phenotypically identified as Alternaria and molecular identification (ITS 1- 5.8s- ITS2) shows as Alternaria brassicae (Berk.) Sacc. This is the first report of the leaf spot disease on Aloe vera in West Bengal. Once in a week survey was conducted to note the occurrence of this disease throughout the year of 2013 in ten places of 24 Parganas District, West Bengal. In all ten places, this disease was present from January – December, 2013. Intensive research was conducted in order to record the disease intensity by monitoring Aloe cultivation at 4 selected areas of West Bengal throughout this year. The disease intensity was recorded maximum during July (95.71%) in State Pharmacopical Laboratory and Pharmacy for Medicine, Govt. of W.B, April in Nilgunj (95.45%), May at Rajarhat (87.77%),...