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Acharya Narendra Deva University of Agriculture & Technology, Ayodhya

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20212
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Subject: Entomology × End date: 2021 × Start date: 2021 × Type: Thesis × Thesis Type: Ph.D ×
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    Seasonal abundance of major insect pests and Integrated Pest Management of brinjal shoot and fruit borer, Leucinodes orbonalis Guenee
    (ANDUAT, Kumarganj, Ayodhya, 2021-07-29) Kumar, Akshay; Chandra, Umesh
    The present investigation entitled “Seasonal abundance of major insect pests and Integrated Pest Management of brinjal shoot and fruit borer, Leucinodes orbonalis Guenee” has been proposed to be carried out at Students’ instructional Form of A.N.D.U.A. & T., Kumarganj, Ayodhya (U.P.) d Kharif season, 2019 and 2020. The maximum and minimum shoot infestation 31.85 and1.32 per cent was observed during 43rd SW and 35th SW of Kharif season, 2019, respectively. The maximum and minimum shoot infestation 36.84 and 0.80 per cent was recorded during 43rd SW and 35th SW Kharif season, 2020, respectively. The maximum and minimum fruit infestation 34.26 and 2.35 per cent was recorded during 46th SW and 39th SW Kharif season, 2019, respectively. The maximum and minimum fruit infestation 38.24 and 2.12 per cent was observed during 46th SW and 39th SW Kharif 2020 respectively. Spider highest mean population 3.42 spider/plant was noticed at fruiting stage followed by flowering stage (1.73 spider/plant), vegetative stage (1.12 spider/plant) and seedling stage (1.01 spider/plant) respectively, during Kharif 2019 and Kharif 2020. Ladybird beetle highest pooled mean population 4.99 beetles/plant was observed at fruiting stage followed by flowering stage (4.73 beetles/plant), vegetative stage (3.32 beetles/plant and seedling stage (1.75 beetles/plant) respectively, during Kharif 2019 and Kharif 2020.Shoot infestation per cent revealed a highly significant negative correlation with the minimum temperature (r= -0.465 and -0.951), non-significant negative correlation with maximum temperature (r= -0.044 and -0.281), during Kharif 2019 and 2020, non-significant negative correlation with relative humidity (r= -0.147) and (r= -0.139) and rainfall (r= 0.322) and (r= 0.254) showed non-significant with positive correlation during Kharif season, 2019 & Kharif season, 2020. Average duration of L. orbonalis from egg to adult emergence on brinjal during 2019 and 2020 at 30 ºC and 60% RH in case of male was ranged 21-27 and 21-27 days with a mean of 24.15 ±0.828 and 25.70 ± 0.613 days respectively. Average duration of L. orbonalis also showed that the total life cycle during 2019 and 2020 at 30 ºC and 60% RH in case of female was ranged 23-31 and 23-31 days with a mean of 26.68 ±0.914 and 27.77± 0.283 days respectively.
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    ThesisItemUnknown
    Studies on incidence of insect pests in chickpea and biorational management of gram pod borner, Helicoverpa armigera (Hubner)
    (ANDUAT, Kumarganj, 2021-01-21) Veer, Ram; Chandra, Umesh
    “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.