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Dr. Rajendra Prasad Central Agricultural University, Pusa

In the imperial Gazetteer of India 1878, Pusa was recorded as a government estate of about 1350 acres in Darbhanba. It was acquired by East India Company for running a stud farm to supply better breed of horses mainly for the army. Frequent incidence of glanders disease (swelling of glands), mostly affecting the valuable imported bloodstock made the civil veterinary department to shift the entire stock out of Pusa. A British tobacco concern Beg Sutherland & co. got the estate on lease but it also left in 1897 abandoning the government estate of Pusa. Lord Mayo, The Viceroy and Governor General, had been repeatedly trying to get through his proposal for setting up a directorate general of Agriculture that would take care of the soil and its productivity, formulate newer techniques of cultivation, improve the quality of seeds and livestock and also arrange for imparting agricultural education. The government of India had invited a British expert. Dr. J. A. Voelcker who had submitted as report on the development of Indian agriculture. As a follow-up action, three experts in different fields were appointed for the first time during 1885 to 1895 namely, agricultural chemist (Dr. J. W. Leafer), cryptogamic botanist (Dr. R. A. Butler) and entomologist (Dr. H. Maxwell Lefroy) with headquarters at Dehradun (U.P.) in the forest Research Institute complex. Surprisingly, until now Pusa, which was destined to become the centre of agricultural revolution in the country, was lying as before an abandoned government estate. In 1898. Lord Curzon took over as the viceroy. A widely traveled person and an administrator, he salvaged out the earlier proposal and got London’s approval for the appointment of the inspector General of Agriculture to which the first incumbent Mr. J. Mollison (Dy. Director of Agriculture, Bombay) joined in 1901 with headquarters at Nagpur The then government of Bengal had mooted in 1902 a proposal to the centre for setting up a model cattle farm for improving the dilapidated condition of the livestock at Pusa estate where plenty of land, water and feed would be available, and with Mr. Mollison’s support this was accepted in principle. Around Pusa, there were many British planters and also an indigo research centre Dalsing Sarai (near Pusa). Mr. Mollison’s visits to this mini British kingdom and his strong recommendations. In favour of Pusa as the most ideal place for the Bengal government project obviously caught the attention for the viceroy.

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20201
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Subject: Entomology × Author: Chandrika, Thanikanti × Start date: 2001 ×
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    ThesisItemOpen Access
    Estimation of residues of Pyriproxyfen and Fenpropathrin in Chilli, Capsicum annum L.
    (DRPCAU, Pusa, 2020) Chandrika, Thanikanti; Sahoo, Sanjay Kumar
    “Estimation of Residues of Pyriproxyfen and Fenpropathrin in Chilli, Capsicum annum L.” was carried at “Dr. Rajendra Prasad Central Agricultural University, Pusa” during 2019-2020. Representative samples of chilli at varying intervals after third spray were analysed following slightly modified QuEChERS techniques. Spraying of chilli crop with pyriproxyfen @ 50 and 100 and fenpropathrin @ 75 and 150 g a.i. ha-1 led to the initial residues ranging from 0.43 to 0.52 and 0.70 to 0.89 and 0.12 to 0.14 and 0.19 to 0.22 mg/ kg, correspondingly. Pyriproxyfen and fenpropathrin residues in chilli dissipated fast and found below limit of quantification later 3 and 5 days at low and high doses, accordingly. The T1/2 of pyriproxyfen in chilli were calculated to be 0.66 and 1.11 days whereas, for fenpropathrin, the values were 2.41 and 1.92 days. Residue of pyriproxyfen on chilli was found below the MRL of 0.02 mg/ kg after 2.97 days when practiced @ 50 g a.i./ha. However, residues for fenpropathrin on chilli collected 0 day after spray was below MRL following application @ 75 g a.i./ha. Therefore, experimental findings suggest a pre harvest interval of 3 and 1 day for pyriproxyfen and fenpropathrin at single dosage on chilli if followed good agricultural practices. Among various household processing methods, boiling reduces 56.52 per cent residue followed by washing (50.65 per cent), dipping in salt solution (47.17 per cent), dipping in sodium bicarbonate solution (41.30 per cent), dipping in acetic acid solution (39.78 per cent) and dipping in KMnO4 solution (39.13 per cent) after 0 (2hours after spray) day of treatment of pyriproxyfen @ 50 g a.i./ ha in chilli. Samples taken after 1 day of application when subjected to different household processing, the reduction per cent were ranged from 12.50 to 37.50 per cent with highest reduction with boiling and least with dipping in sodium bicarbonate solution. The mean initial deposits of fenpropathrin residue on chilli samples after third spray @ 75 g a.i./ ha accounted a loss of 72.50, 55.83, 52.50, 52.50, 50.00 and 41.67 per cent, as a result of dipping in KMnO4 solution, washing, boiling, dipping in sodium bicarbonate solution, salt solution and acetic acid solution, respectively. But in 1 day samples, the mean residue of fenpropathrin on chilli were BDL thereby, accounted the loss of 100 per cent. Key words: Pyriproxyfen, fenpropathrin, residues, waiting period, household processing.