Studies on incidence of insect pests in chickpea and biorational management of gram pod borner, Helicoverpa armigera (Hubner)

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dc.contributor.advisorChandra, Umesh
dc.contributor.authorVeer, Ram
dc.date.accessioned2022-02-24T08:41:39Z
dc.date.available2022-02-24T08:41:39Z
dc.date.issued2021-01-21
dc.descriptionThesisen_US
dc.description.abstract“Studies on incidence of insect pests in chickpea and biorational management of gram pod borer, Helicoverpa armigera (Hübner)” revealed that the larval population of H. armigera were noticed for the first time during 47th & 46th standard week (SW) of Rabi season, 2017-18 & Rabi season, 2018-19. The minimum larval population of H. armigera was 0.26 & 0.33 larvae /plant recorded during 47th SW of Rabi season, 2017-18 & Rabi season, & 2018-19 followed by 0.40 & 0.47 larvae /plant were recorded in 48th of Rabi season, 2017-18 & 46th SW of Rabi season, 2018-19. The maximum larvae were recorded in the 10th SW of Rabi season, 2017-18 & 12th SW of Rabi season, 2018-19 with respective larval population of H. armigera 3.13 & 3.86 / plant followed by 2.93 larvae & 3.54 larvae /plant in 9th SW of Rabi season, 2017-18 & 11th SW of Rabi season, 2018- 19.The incidence of H. armigera showed non-significant positive correlation with minimum temperature (0.166) during Rabi season, 2018-19, maximum temperature (0.087) & (0.030) during Rabi season, 2017-18 & Rabi season, 2018-19 while minimum temperature (-0.008) during 2017-18, relative humidity (-0.330) & (-0.233) and rainfall (-0.085) & (-0.169) showed nonsignificant with negative correlation during Rabi season, 2017-18 & Rabi season, 2018-19.The minimum per cent parasitization 08.10 & 10.86 per cent was recorded during 14th SW of Rabi season, 2017-18 & Rabi season, 2018-19 during this week 37 & 46 larvae were collected from which 03 & 05 parasitoid emerged followed by 03rd SW of Rabi season, 2017-18 & 4th SW of Rabi season, 2018-19, 44 & 47 larvae collected from which 06 & 06 parasitoids emerged resulting in 13.64 & 12.77 per cent parasitization was recorded, respectively.The maximum per cent parasitization of 23.29 & 24.66 per cent was recorded during 10th SW of Rabi season, 2017-18 & 9th SW of Rabi season, 2018-19 as a result of emergence 17 & 18 parasitoids from 73 larvae collected from Students’ Instructional farm followed by 11th SW of Rabi season, 2017-18 & 10th SW of Rabi season, 2018-19, 57 & 68 larvae of H. armigera were collected from which 13 & 15 parasitoids emerged resulting in 22.80 & 22.06 per cent parasitization. During this period total 656 & 707 larvae of H. armigera were collected from which 121 & 124 parasitoids were emerged, resulting in 17.74 & 17.11 per cent mean parasitization during crop period Rabi season, 2017-18 & Rabi season, 2018- 19, respectively.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810182819
dc.keywordsBiorational Management, Gram pod Borberen_US
dc.language.isoEnglishen_US
dc.pages145en_US
dc.publisherANDUAT, Kumarganjen_US
dc.subEntomologyen_US
dc.themePests in chickpea and biorational managementen_US
dc.these.typePh.Den_US
dc.titleStudies on incidence of insect pests in chickpea and biorational management of gram pod borner, Helicoverpa armigera (Hubner)en_US
dc.typeThesisen_US
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