Studies on Population Dynamics and Management of Major Insect pests of Field pea

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dc.contributor.advisorKumar, Neeraj
dc.contributor.authorR E, KARTHICK
dc.date.accessioned2023-03-07T10:00:52Z
dc.date.available2023-03-07T10:00:52Z
dc.date.issued2021
dc.description.abstractTo know the population dynamics of major insect pests of field pea and also evaluation of some eco-friendly management practices for the of major insect pests of field pea, the experiments were conducted at Tirhut College of Agriculture, Dholi, Bihar in Rabi season during the year 2019-2020. Studies on population dynamics of major insect pests and the natural enemies associated with field pea revealed that the infestation of Aphis craccivora appeared during the 47th SMW (20.11.2019-26.11.2019) with population of 9.86/10cm twig and in Ophiomyia phaseoli, it was during the 47th SMW (20.11.2019-26.11.2019) with 3.56 per cent plant infestation and in case of pod borer, it appeared during the 4th SMW (22.01.2020-28.01.2020) with population of 0.34 larvae/ plant. Maximum population of aphid was recorded during the 49th SMW (04.12.2019-10.12.2019) with population of about 22.34 / 10cm twig and in stem fly maximum infestation was recorded during 48th SMW (27.11.2019-03.12.2019) with 8.84 per cent plant infestation and in pod borer, it was recorded during 6th SMW (05.02.2020-11.02.2020) with population of about 3.08 larvae/ plant. Population dynamics of natural enemies viz., spiders and ladybird beetles were counted at weekly intervals and it was found Post Graduate degree programme : M.Sc., (Ag) Department : Entomology Name of student : Karthick R E Major subject : Entomology Minor subject : Plant Pathology Admission/ Registration No. : M/Ento/333/2019-20 Major advisor : Dr. Neeraj Kumar Title of the research work : “Studies on Population Dynamics and Management of Major Insect pests of Field pea” that spider and lady bird population was found maximum during the 48th SMW (27.11.2019-03.12.2019) and 7th SMW (12.02.2020-18.02.2020). Natural enemies were also recorded and found throughout the crop period. Besides these, efficacy of different eco-friendly practices was also carried out and its impact on the pest infestation were also recorded. Among the different treatments applied, the mean number of aphids was found less in plot where seeds were treated with imidacloprid 17.8 SL @ 3 ml/kg of seed followed by spraying of chlorantraniliprole 18.5 SC @ 0.2 ml/l (3.60 aphids/ 10cm twig). In case of stem fly infestation, plot where seeds were treated with imidacloprid 17.8 SL @ 3 ml/kg of seed followed by spraying of chlorantraniliprole 18.5 SC @ 0.2 ml/l was found effective in controlling stem fly infestation (2.28 mean per cent plant infestation). In case of pod borer, plot where seeds were treated with imidacloprid 17.8 SL @ 3 ml/kg of seed followed by spraying of chlorantraniliprole 18.5 SC @ 0.2 ml/l was found effective among other treatments with 0.74 larvae/ plant. The per cent increase in yield over control revealed that plot where seeds were treated with imidacloprid 17.8 SL @ 3 ml/kg of seed followed by spraying of chlorantraniliprole 18.5 SC @ 0.2 ml/l had 65.30 per cent increase in yield over the control followed by the plot where seeds were treated with imidacloprid 17.8 SL @ 3 ml/kg of seed followed by spraying of Bacillus thuringiensis var. kurstaki 127 SC @ 3 ml/l with 49.56 per cent increase in yield over control. B:C ratio was highest in the plot where seeds were treated with imidacloprid 17.8 SL @ 3 ml/kg of seed followed by spraying of chlorantraniliprole 18.5 SC (1: 1.54) followed by the Bacillus thuringiensis var. kurstaki 127 SC @ 3 ml/l treated plots (1: 1.45). The above result might be concluded that for the management of major insect pests of field pea, it was found that plot where seeds were treated with imidacloprid 17.8 SL @ 3 ml/kg of seed followed by spraying of chlorantraniliprole 18.5 SC was superior among other treatments in managing the pests as comparatively better yield and Benefit cost ratio was also found highest among other treatments.en_US
dc.identifier.otherM/Ento/333/2019-20
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810194854
dc.keywordsPopulation Dynamics, Major Insect pests, Field pea.en_US
dc.language.isoEnglishen_US
dc.pages58 + 59-63 (References)en_US
dc.publisherDRPCAU, PUSAen_US
dc.subEntomologyen_US
dc.themeStudies on Population Dynamics and Management of Major Insect pests of Field pea.en_US
dc.these.typeM.Scen_US
dc.titleStudies on Population Dynamics and Management of Major Insect pests of Field peaen_US
dc.typeThesisen_US
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