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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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2014 - 20172
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Subject: Zoology × Author: Yadav, Jyoti × End date: 2019 × Start date: 2010 ×
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    ThesisItemOpen Access
    Comparative impact of insecticides on bacterial and acetylcholinesterase activity of Eisenia fetida (Savigny) and Pheretima posthuma (Kinberg)
    (CCSHAU, 2017) Yadav, Jyoti; Dharambir Singh
    The present study was carried out to analyze the toxicity of chlorpyrifos and carbofuran on E. fetida and P. posthuma. Paper contact toxicity test was used to determine LC50. LC50 of chlorpyrifos against adult E. fetida and P. posthuma was 0.25% and 0.11%, respectively. While LC50 of carbofuran against adult E. fetida and P. posthuma was 5.14% and 4.11%, respectively that confirms the greater sensitivity of P. posthuma towards insecticide induced toxicity in comparison to E. fetida. Lower LC50 value of chlorpyrifos confirms its higher toxicity as compared with carbofuran. Total 52 bacterial isolates were isolated from the gut of worms, out of which six resistant gut bacterial species having agricultural importance were identified as Sphingobacterium sp., Citrobacter freundii, Citrobacter murliniae, Bacillus australimaris and Burkholderia paludis. Inhibition in AChE activity due to chlorpyrifos and carbofuran exposure was observed at 24h. While E. fetida exposed to carbofuran tried to maintain AChE level, which may be seen as strategy to cope up with toxicity after prolonged exposure.
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    ThesisItemOpen Access
    Effects of heavy metals on concentration of biomolecules in earthworm (Eisenia foetida)
    (CCSHAU, 2014) Yadav, Jyoti; Gupta, R.K.
    A study of 90 days duration was conducted to evaluate the efficiency of an exotic earthworm species (epigeic- Eisenia foetida ) for decomposition of different kind of organic substrates. Five experimental vermibeds along with three replicates each were prepared by using cowdung along with different combinations of wheat straw, rice straw, vegetable waste and sugarcane baggasse having ratio 5:1. The result obtained indicates reduction in C: N ratio, which indicates the reduction in biodegradable organic content and increase in nitrogen content. The decrease in carbon and increase in nitrogen content improves the quality of vermicompost as manure. The best results of vermicomposting have been obtained from the substrate having cow dung and rice straw (5:1) due to the probability that rice straw is easily palatable and digestible for earthworms having constant pH. Then the survivability and reproduction rate of earthworms was checked on weekly intervals for one month which showed least survivability in case of Cd (0.06 ppm) followed by Cd(0.03 ppm) + Zn (0.03 ppm). Cocoon production rate and hatchling rate declined at high concentrations of heavy metals individually as well as in combination. Sewage also showed the significant decline in survivability, cocoon production rate as well as in number of hatchlings per cocoon. Then the effect of heavy metals on the biomolecular concentration of earthworms was analyzed for three months at interval of 45 days where sewage did not showed the significant differences in the biomolecular concentration as compared to the control. The maximum reduction among all heavy metals treatment was seen in the case of cadmium (0.06 ppm). Thus the study proves that Cadmium is more toxic and detrimental to earthworms as compared to control.