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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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20201
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Subject: Agricultural Entomology × Start date: 2020 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Bioefficacy and persistence of novel insecticides against Helicoverpa armigera (Hubner) in chickpea and their leaching behaviour in soil
    (CCSHAU, Hisar, 2020) Vijaya; Yadav, S.S
    The present studies on Bioefficacy and persistence of novel insecticides against Helicoverpa armigera (Hubner) in chickpea and their leaching behaviour in soil were conducted at Pulses Research Farm, CCS HAU Hisar during Rabi 2017-18 and 2018-19. The population dynamics studies of H. armigera revealed that the peak larval population of H.armigera reached 5.50 and 5.71 larvae/mrl in 14th and 15thSMW during 2017-18 and 2018-19, respectively. The correlation studies showed that H. armigera population had positive and significant correlation with maximum, minimum temperature and wind velocity while significant negative correlation with morning and evening relative humidity was observed during both of the years. There was non significant negative correlation between larval population and rainfall while non significant positive correlation was found with sunshine hours in both years. The efficacy studies showed that chlorantraniliprole 18.5 SC was the most effective treatment with 0.41 larva/mrl followed by flubendiamide 39.35 SC (0.57 larva/mrl). The least effective treatment was Bacillus thruiengensis 5 WP with highest number of larval count of 1.09 larvae/mrl followed by lambda cyhalothrin 5 EC (0.96 larva/mrl) and quinalphos 25 EC (0.93 larva/mrl). The pooled data of yield showed that chlorantraniliprole 18.5 SC treated plots were found to be significantly superior over other treatments with mean increase of 51.34 per cent over control plot while the plots treated with bacillus thruiengensis 5 WP provided a yield of 1236.11 kg per ha with a mean increase of 16.29 per cent over control. The pooled data of per cent pod damage showed that chlorantraniliprole 18.5 SC treated plots showed 8.31 per cent pod damage while the plots treated with bacillus thruiengensis 5 WP were affected by 17.71 per cent pod damage. The avoidable losses (pooled) during 2017-18 and 2018-19 accounted for 49.61 per cent with mean number of larvae per mrl 6.50 times lower under protected conditions. Mean yield (kg) per hectare was 2.0 times higher in protected conditions. Highly significant positive correlation between larval population of H. armigera and percent pod damage while negative correlation was observed between larval population and the yield obtained under both protected and unprotected conditions. Similarly, negative correlation was observed between percent pod damage and the yield obtained under both conditions. The dissipation kinetics of residues of chlorantraniliprole and flubendiamide at both single and double doses followed the first order kinetics in chickpea leaves and pods during both of the years. The residues of both insecticides in chickpea leaves and pods reached below LOQ after 7th and 10th day of application at single and double doses, respectively. The half lives (days) were less in double dose as compared to the single dose for both of the insecticides in both chickpea leaves and pods during the two years. The results also showed that terminal residues of chlorantraniliprole and flubendiamide were below LOQ in chickpea grain, straw and soil. The results for leaching behaviour revealed that maximum retention of 75.20 and 78.90 per cent was observed in 0-5 cm layer of soil only at single (40μg) and double dose (80μg) for chlorantraniliprole. For flubendiamide, it was observed that the insecticide was confined in upper soil layers (0-10cm) with 85.86 and 89.10 per cent retention at single (36μg) and double dose (72μg), respectively. None of the leachate fractions showed the presence of both insecticides at both single and double dose.