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Author: Sonu Kumari × End date: 2022 × Start date: 2022 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Studies on insect pest complex in pulses, biology and management of spotted pod borer, Maruca vitrata (Fabricius) in green gram, Vigna radiata (L. Wilczek)
    (CCSHAU Hisar, 2022-07) Sonu Kumari; Balbir Singh
    The current studies entitled “Studies on insect pest complex in pulses, biology and management of spotted pod borer, Maruca vitrata(Fabricius) in green gram, Vigna radiata (L. Wilczek)” was carried out at CCSHAU Regional Research Station, Bawal and oilseed section, Deparment of Genetics and Plant Breeding during Kharif 2020 and 2021. Survey revealed that the population of leafhopper (6.96 leafhopper/plant), hairy caterpillar (0.85 larvae/plant), aphid (12.04 aphid/plant), whitefly (7.71 whitefly/plant), spotted pod borer (2.75 larvae/plant), blister beetle (13.24 adults/plant) and tur pod bug (6.63 bugs/plant) was more abundant in Gurugram district as compared to Mahendragarh and Rewari. The seasonal incidence revealed that the larval population of spotted pod borer increased significantly with maximum temperature (r=0.956 and 0.761) and showed significant negative correlation with rainfall (r=-0.823 and -0.911) during Kharif 2020 and 2021, respectively. The biology of spotted pod borer, M. vitrata showed that total developmental period (egg to adult) was 34.35±1.62 days. The fecundity of female moth was on an average 47±5.48 eggs/female. The treatment azadirachtin (0.03%) was found most effective protectants resulted in reduction larval population (4.32 larvae /m2), per cent pod damage (12.94%) and highest grain yield (13.01 q/ha) as well as per cent increase yield over control (35.69%) followed by neem oil (20 ml/l) and neem seed kernel extract 5 per cent (50 ml/l). The trichome density on leaves and pods and pod breadth was responsible for the resistance to spotted pod borer. Whereas, pod size, number of grains per pod and pod wall thickness were associated with the susceptibility to M. vitrata. Expression of resistance to spotted pod borer infestation was associated with higher amount of phenol content, low amount of soluble sugar and crude protein in pods as well as grains of pulses crop.