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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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Subject: Zoology × Author: Akshay Kumar × End date: 2019 × Start date: 2010 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Assessment of neonicotinoid on the vermicomposting efficacy, avoidance behavior and growth parameters of earthworm Eisenia fetida
    (CCSHAU, 2019) Akshay Kumar; Dharambir Singh
    A greater part (>80%) of the biomass of land invertebrates is constituted by earthworms which play a useful role in increasing and structuring the nutrient content of the soil. Neonicotinoid insecticides are among some of the most important insecticides applied to crops which have been the world‘s largest selling insecticides for many years. On one hand, the pesticides help in enhancing the quality and quantity of crop production, but the indiscriminate use of pesticides also poses immense threat to the growth and survivability of earthworm. Due to earthworm‘s uniform distribution in agro ecosystems, they are more prone to the damage caused by pesticides. Present study was carried out to assess the impact of neonicotinoid on the vermicomposting efficacy, avoidance behavior and growth parameters of earthworm Eisenia fetida. The insecticides viz. imidacloprid and acetamiprid were used individually as well as in combinations of different concentrations. Maximum avoidance behavior (56.01±4.45%) was observed for acetamiprid @ 0.75 mg /kg exposure in comparison to other treatments. The observations proved toxicity of insecticides individually as well as in combination of different concentrations on survival rate, growth parameters (length and weight) and reproductive potential. Minimum number of adult earthworm and cocoon production was 18.00±1.53 &12.67±1.20 respectively in the worms exposed to imidacloprid + acetamiprid (@1.00+0.38 mg/kg on 90th day of experiment. Similarly, minimum body weight (0.40±0.06 gram) and length gain (6.56±0.34 cm) were observed in the same treatment. There was increase in the nutrient status of vermicompost; increase of 28.76% in nitrogen, 47.57% in phosphorus and 16.20% in potassium was recorded whereas total organic carbon of vermicompost reduced (reduction of 29.19%). Significant reduction (45%) in C: N ratio after the end of experiment explains the improvement in quality of vermicompost.