Gitanjali Devi - Academia.edu (original) (raw)

Papers by Gitanjali Devi

Archives of current research international, May 19, 2024

Tomato is an important vegetable crop. Various plant parasitic nematode cause extensive damage du... more Tomato is an important vegetable crop. Various plant parasitic nematode cause extensive damage during growth stage of tomato. Pathogenic level of Reniform nematode (Rotylenchulus reniformis), was investigated on tomato var. Pusa Ruby by inoculating 10, 100, 500, 1000, 5000 and 10000 nematodes per kg autoclaved soil. Observations on plant growth parameters and nematode numbers were recorded at 60 days following inoculation. The inoculated seedlings showed a progressive decrease in the plant growth parameters with increase in inoculum level of R. reniformis. Significant reduction in plant growth parameters were recorded at 1000 and above nematodes/kg soil. There was a gradual increase in the number of females, egg masses per root system, and nematode population of R. reniformis with increase in inoculum level. The rate of multiplication decreased with increase in the level of inoculation. The pathogenic level of R. reniformis was found to be 1000 nematodes per kg soil.

Journal of agriculture and ecology research international, Mar 7, 2024

Dipteran insects are most destructive agricultural pests. They are also vectors of many diseases ... more Dipteran insects are most destructive agricultural pests. They are also vectors of many diseases of human and animal. Much effort has been made to control this pest through chemical treatment. The application of biological control agents has been advocated as an ecofriendly control method for insect pests. Entomopathogenic nematodes (EPNs) are obligate insect parasites that can be effective biocontrol agents for many agricultural pests including many Dipteran insect pests. EPNs pose much less threat to the environment than chemical pesticides. However, several biotic and abiotic factors along with method of application influence the bioefficacy of this organism against Dipteran insects. This review paper provides an overview of developments in entomopathogenic nematode research and evaluation of their potential for use against Dipteran insect pests.

Asian Journal of Microbiology Biotechnology and Environmental Sciences, Dec 31, 2022

Journal of entomological research, Dec 31, 2022

Journal of Biopesticides

Entomopathogenic nematodes (EPNs) in the genera Steinernema and Heterorhabditis and their associa... more Entomopathogenic nematodes (EPNs) in the genera Steinernema and Heterorhabditis and their associated bacteria such as Xenorhabdus spp. and Photorhabdus spp. are lethal parasites of soil dwelling insects. A survey was conducted to collect theentomopathogenic nematodes from Lepidiota mansueta endemic field of Majuli river island, Assam, India. During the survey, a total of 140 soil samples (1 kg each) and 80 dead grubs of L. mansueta were collected from different locations from cultivated as well as uncultivated fields of Majuli. Out of the total collection, 8 numbers of soil samples and 35 grubs were positive for entomopathogenic nematodes with 5.7 and 43.7 per cent respectively. Soil samples recorded 2.1 and 3.5 per cent Heterorhabditis and Steinernema isolates whereas the grubs registered 15 and 28.7 per cent of Heterorhabditis andSteinernema isolates respectively. Based on morphometric and cross-breeding studies, the Heterorhabditis isolates were identified as H. bacteriophora and...

International journal of plant and soil science, Feb 15, 2024

Entomopathogenic nematodes (EPNs) are potential biocontrol agents against many insect pests. The ... more Entomopathogenic nematodes (EPNs) are potential biocontrol agents against many insect pests. The infective juveniles (IJs) dwell in soil ecosystem in a free-living state which is responsible for pest suppression under certain environmental condition. These IJs are faced with a wide range of environmental conditions during this stage. Abiotic factors such as temperature, moisture/relative humidity, soil texture and structure, ultraviolet radiation influence the survival, growth and development, and reproduction of entomopathogenic nematodes and ultimately their performance on bioefficacy against insect pests.

International Journal of Environment, Agriculture and Biotechnology, 2018

Utilization of entomopathogenic nematodes (EPNs) is an ecofriendly method of crop protection. EPN... more Utilization of entomopathogenic nematodes (EPNs) is an ecofriendly method of crop protection. EPNs can be easily mass produced. Production approaches are either in vivo or in vitro methods (solid and liquid). Most nematodes intended for commercial application are produced in solid or liquid fermentation technology. However, for laboratory research and small greenhouse or field trials, in vivo production of entomopathogenic nematodes is the common method of propagation. Mass production of EPNs is influenced by the amount of progeny required, time, resources, the costs of production, as well as the level of expertise available. The differences in nematode life cycle and bacterial symbiosis play major role in final nematode yields. This review describes the general biology of EPNs and gives an overview of studies to date on EPNs mass production. Keywords-Entomopathogenic nematodes, bacterial symbiosis, biocontrol agent, in vivo mass production, in vitro mass production. I.

Asian Journal of Microbiology, Biotechnology and Environmental Sciences, Mar 15, 2022

Indian journal of nematology, 2007

... Andhra Pradesh P. HARINATH NAIDU, V. HARITHA AND M. JOHN SUDHEER1 Department of Plant Patholo... more ... Andhra Pradesh P. HARINATH NAIDU, V. HARITHA AND M. JOHN SUDHEER1 Department of Plant Pathology, Regional Agricultural Research Station, Tirupati, India 1Entomology, Agricultural Research Station, Kadiri, India ... Phytonematology. Naya Prakash. Calcutta. ...

Indian journal of nematology, 2007

Journal of entomology and zoology studies, 2021

A field experiment was conducted at ICR Farm, AAU, Jorhat during the year 2019-20 to evaluate the... more A field experiment was conducted at ICR Farm, AAU, Jorhat during the year 2019-20 to evaluate the efficacy of entomopathogenic nematode, Heterorhabditis bacteriophora at different application doses against cutworm, Agrotis ipsilon on potato. Lowest tuber damage was recorded at 5.0×10 9 IJs/ha followed by at 2.5×10 9 IJs/ha as compared to untreated control. Highest yield was recorded in the treatment at application dose 5.0×10 9 IJs/ha. Cost benefit ratio revealed that application with higher dose of H. bacteriophora proved most effective followed by subsequent doses as well as neem pesticide.

Journal of entomological research, 2022

Indian journal of nematology, 1998

A field experiment was conducted on carrot var., ‘Early Nentes’, with four organic amendments in ... more A field experiment was conducted on carrot var., ‘Early Nentes’, with four organic amendments in two doses viz., sawdust, neem cake, poultry manure each @ 1.0 and 1.5 ton ha−1 and water hyacinth @ 1.0 and 2.0 ton ha−1 Results revealed that all organic amendments were found to be effective in reducing the galls, final nematode population and forked tap root of carrot and subsequently increased the yield and yield attributing characters of carrot. Further, among all organic amendments, neem cake was found significantly superior at both the doses i.e. 1.0 and 1.5 t ha−1 in reducing the nematode population and increased yield of carrot followed by sawdust, poultry manure and water hyacinth at higher doses.

Indian journal of nematology, 2017

Indian journal of nematology, 2016

International Journal of Plant & Soil Science

Plant-parasitic nematodes are important threat to agricultural crops. Management through biologic... more Plant-parasitic nematodes are important threat to agricultural crops. Management through biological control agents like endoparasitic bacteria, Pasteuria spp. has shown great promise. They occur worldwide and have been reported from a wide range of environment.A comprehensive understanding of the biology of Pasteuria spp. and their mechanism underlying nematode disease suppression may help to develop useful biocontrol agent against plant-parasitic nematodes. This review gives an account of the morphology, biology, parasitic mechanisms of Pasteuria spp and their potential uses.

International Journal of Plant & Soil Science

Banana is an important fruit crop which is grown in tropical and subtropical parts of the world. ... more Banana is an important fruit crop which is grown in tropical and subtropical parts of the world. Banana production is inhibited by various insect pests. Though chemical insecticides are recommended for control of these pests, use of biocontrol agents are alternative method .One of the biocontrol agents is the entomopathogenic nematodes (EPNs). This review finds the work of some of the successful EPN species or strains from different geographical locations that may affect practical bio control of banana rhizome weevil, a major pest of banana. Emphasis is made on roles of EPNs in reducing banana rhizome weevil (Cosmopolites sordidus) and directions of future research in biocontrol programme are presented.

International journal of applied research, Jul 1, 2022

Leucas spp. are important medicinal plant found in India. All the parts of the plant contain vari... more Leucas spp. are important medicinal plant found in India. All the parts of the plant contain various bioactive compounds. Therefore the plants are used as remedies for various ailments. This review reveals a brief account of Leucas spp. and its medicinal properties.

Acta Scientific Agriculture

A number of insect pests and mites are recorded which are the major limitation of yield and quali... more A number of insect pests and mites are recorded which are the major limitation of yield and quality of mango production. Though chemical insecticides are recommended for control of these pests, other alternative control measures like use of biocontrol agents should be considered. One of the promising biocontrol agents is the entomopathogenic nematodes. This review finds the work done so far on bioefficacy of entomopathogenic nematodes on important insect pests of mango.

Archives of current research international, May 19, 2024

Tomato is an important vegetable crop. Various plant parasitic nematode cause extensive damage du... more Tomato is an important vegetable crop. Various plant parasitic nematode cause extensive damage during growth stage of tomato. Pathogenic level of Reniform nematode (Rotylenchulus reniformis), was investigated on tomato var. Pusa Ruby by inoculating 10, 100, 500, 1000, 5000 and 10000 nematodes per kg autoclaved soil. Observations on plant growth parameters and nematode numbers were recorded at 60 days following inoculation. The inoculated seedlings showed a progressive decrease in the plant growth parameters with increase in inoculum level of R. reniformis. Significant reduction in plant growth parameters were recorded at 1000 and above nematodes/kg soil. There was a gradual increase in the number of females, egg masses per root system, and nematode population of R. reniformis with increase in inoculum level. The rate of multiplication decreased with increase in the level of inoculation. The pathogenic level of R. reniformis was found to be 1000 nematodes per kg soil.

Journal of agriculture and ecology research international, Mar 7, 2024

Dipteran insects are most destructive agricultural pests. They are also vectors of many diseases ... more Dipteran insects are most destructive agricultural pests. They are also vectors of many diseases of human and animal. Much effort has been made to control this pest through chemical treatment. The application of biological control agents has been advocated as an ecofriendly control method for insect pests. Entomopathogenic nematodes (EPNs) are obligate insect parasites that can be effective biocontrol agents for many agricultural pests including many Dipteran insect pests. EPNs pose much less threat to the environment than chemical pesticides. However, several biotic and abiotic factors along with method of application influence the bioefficacy of this organism against Dipteran insects. This review paper provides an overview of developments in entomopathogenic nematode research and evaluation of their potential for use against Dipteran insect pests.

Asian Journal of Microbiology Biotechnology and Environmental Sciences, Dec 31, 2022

Journal of entomological research, Dec 31, 2022

Journal of Biopesticides

Entomopathogenic nematodes (EPNs) in the genera Steinernema and Heterorhabditis and their associa... more Entomopathogenic nematodes (EPNs) in the genera Steinernema and Heterorhabditis and their associated bacteria such as Xenorhabdus spp. and Photorhabdus spp. are lethal parasites of soil dwelling insects. A survey was conducted to collect theentomopathogenic nematodes from Lepidiota mansueta endemic field of Majuli river island, Assam, India. During the survey, a total of 140 soil samples (1 kg each) and 80 dead grubs of L. mansueta were collected from different locations from cultivated as well as uncultivated fields of Majuli. Out of the total collection, 8 numbers of soil samples and 35 grubs were positive for entomopathogenic nematodes with 5.7 and 43.7 per cent respectively. Soil samples recorded 2.1 and 3.5 per cent Heterorhabditis and Steinernema isolates whereas the grubs registered 15 and 28.7 per cent of Heterorhabditis andSteinernema isolates respectively. Based on morphometric and cross-breeding studies, the Heterorhabditis isolates were identified as H. bacteriophora and...

International journal of plant and soil science, Feb 15, 2024

Entomopathogenic nematodes (EPNs) are potential biocontrol agents against many insect pests. The ... more Entomopathogenic nematodes (EPNs) are potential biocontrol agents against many insect pests. The infective juveniles (IJs) dwell in soil ecosystem in a free-living state which is responsible for pest suppression under certain environmental condition. These IJs are faced with a wide range of environmental conditions during this stage. Abiotic factors such as temperature, moisture/relative humidity, soil texture and structure, ultraviolet radiation influence the survival, growth and development, and reproduction of entomopathogenic nematodes and ultimately their performance on bioefficacy against insect pests.

International Journal of Environment, Agriculture and Biotechnology, 2018

Utilization of entomopathogenic nematodes (EPNs) is an ecofriendly method of crop protection. EPN... more Utilization of entomopathogenic nematodes (EPNs) is an ecofriendly method of crop protection. EPNs can be easily mass produced. Production approaches are either in vivo or in vitro methods (solid and liquid). Most nematodes intended for commercial application are produced in solid or liquid fermentation technology. However, for laboratory research and small greenhouse or field trials, in vivo production of entomopathogenic nematodes is the common method of propagation. Mass production of EPNs is influenced by the amount of progeny required, time, resources, the costs of production, as well as the level of expertise available. The differences in nematode life cycle and bacterial symbiosis play major role in final nematode yields. This review describes the general biology of EPNs and gives an overview of studies to date on EPNs mass production. Keywords-Entomopathogenic nematodes, bacterial symbiosis, biocontrol agent, in vivo mass production, in vitro mass production. I.

Asian Journal of Microbiology, Biotechnology and Environmental Sciences, Mar 15, 2022

Indian journal of nematology, 2007

... Andhra Pradesh P. HARINATH NAIDU, V. HARITHA AND M. JOHN SUDHEER1 Department of Plant Patholo... more ... Andhra Pradesh P. HARINATH NAIDU, V. HARITHA AND M. JOHN SUDHEER1 Department of Plant Pathology, Regional Agricultural Research Station, Tirupati, India 1Entomology, Agricultural Research Station, Kadiri, India ... Phytonematology. Naya Prakash. Calcutta. ...

Indian journal of nematology, 2007

Journal of entomology and zoology studies, 2021

A field experiment was conducted at ICR Farm, AAU, Jorhat during the year 2019-20 to evaluate the... more A field experiment was conducted at ICR Farm, AAU, Jorhat during the year 2019-20 to evaluate the efficacy of entomopathogenic nematode, Heterorhabditis bacteriophora at different application doses against cutworm, Agrotis ipsilon on potato. Lowest tuber damage was recorded at 5.0×10 9 IJs/ha followed by at 2.5×10 9 IJs/ha as compared to untreated control. Highest yield was recorded in the treatment at application dose 5.0×10 9 IJs/ha. Cost benefit ratio revealed that application with higher dose of H. bacteriophora proved most effective followed by subsequent doses as well as neem pesticide.

Journal of entomological research, 2022

Indian journal of nematology, 1998

A field experiment was conducted on carrot var., ‘Early Nentes’, with four organic amendments in ... more A field experiment was conducted on carrot var., ‘Early Nentes’, with four organic amendments in two doses viz., sawdust, neem cake, poultry manure each @ 1.0 and 1.5 ton ha−1 and water hyacinth @ 1.0 and 2.0 ton ha−1 Results revealed that all organic amendments were found to be effective in reducing the galls, final nematode population and forked tap root of carrot and subsequently increased the yield and yield attributing characters of carrot. Further, among all organic amendments, neem cake was found significantly superior at both the doses i.e. 1.0 and 1.5 t ha−1 in reducing the nematode population and increased yield of carrot followed by sawdust, poultry manure and water hyacinth at higher doses.

Indian journal of nematology, 2017

Indian journal of nematology, 2016

International Journal of Plant & Soil Science

Plant-parasitic nematodes are important threat to agricultural crops. Management through biologic... more Plant-parasitic nematodes are important threat to agricultural crops. Management through biological control agents like endoparasitic bacteria, Pasteuria spp. has shown great promise. They occur worldwide and have been reported from a wide range of environment.A comprehensive understanding of the biology of Pasteuria spp. and their mechanism underlying nematode disease suppression may help to develop useful biocontrol agent against plant-parasitic nematodes. This review gives an account of the morphology, biology, parasitic mechanisms of Pasteuria spp and their potential uses.

International Journal of Plant & Soil Science

Banana is an important fruit crop which is grown in tropical and subtropical parts of the world. ... more Banana is an important fruit crop which is grown in tropical and subtropical parts of the world. Banana production is inhibited by various insect pests. Though chemical insecticides are recommended for control of these pests, use of biocontrol agents are alternative method .One of the biocontrol agents is the entomopathogenic nematodes (EPNs). This review finds the work of some of the successful EPN species or strains from different geographical locations that may affect practical bio control of banana rhizome weevil, a major pest of banana. Emphasis is made on roles of EPNs in reducing banana rhizome weevil (Cosmopolites sordidus) and directions of future research in biocontrol programme are presented.

International journal of applied research, Jul 1, 2022

Leucas spp. are important medicinal plant found in India. All the parts of the plant contain vari... more Leucas spp. are important medicinal plant found in India. All the parts of the plant contain various bioactive compounds. Therefore the plants are used as remedies for various ailments. This review reveals a brief account of Leucas spp. and its medicinal properties.

Acta Scientific Agriculture

A number of insect pests and mites are recorded which are the major limitation of yield and quali... more A number of insect pests and mites are recorded which are the major limitation of yield and quality of mango production. Though chemical insecticides are recommended for control of these pests, other alternative control measures like use of biocontrol agents should be considered. One of the promising biocontrol agents is the entomopathogenic nematodes. This review finds the work done so far on bioefficacy of entomopathogenic nematodes on important insect pests of mango.