Persistence of fipronil and its metabolites in chilli and soil
| dc.contributor.advisor | Beena Kumari | |
| dc.contributor.author | Saini, Sunayana | |
| dc.date.accessioned | 2017-06-03T04:10:17Z | |
| dc.date.available | 2017-06-03T04:10:17Z | |
| dc.date.issued | 2012 | |
| dc.description.abstract | A f ield exper iment was carried to study the persiste nce behavior of chilli and soil underneath and ef fect of processing on the reduction of residues of f ipronil in chilli. Degradation of f ipronil in soil under laboratory and f ield conditions was also studied. Fipronil (Comme rcial formulation) @ 50g and 100g a.i.ha -1 was spray ed in the vegetable Research Farm of Chaudhary Charan Singh (CCS) Hary ana Agricultural University , Hisar on chilli c rop (var iety Hisar Shakti) at f ruiting s tage. Samples of chilli and soil were collected per iodically on 0(1h) , 1, 3, 5, 10, 15, 20 and 30 day s af ter application and harvest. Red chilli collected at harvest (90 day s) contained no detectable residues of f ipronil. Soil samples ( lab and f ield conditio ns) were collected per iodically on 0(1h) , 1, 3, 7, 15, 30, 60, 90 day s af ter application. Residues were estimated by gas chromatography equipped with capillary column and electron capture detector (ECD) . Pe rcent recover y at for tif icatio n level of 0.05and 0.10 mg kg -1 in c hilli and soil were more 80 percent depicting validity of methods used for present studies. The residues of f ipronil did not pe rsist for more than 15 day s af ter treatment. Dissipation followed the f irst o rde r kinetics showing half -life value of 3.19 and 3.67 day s for single and double dose, respectivel y . The per cent reduction of f ipro nil residues by washing was 21.05 ñ 61.72 and 23.52 ñ 62.04 at single and double dose, respectivel y . Maximum reduction was observed on 3 rd day . In soil unde r f ield and laborato ry conditions f ipronil pe rsisted up to 90 and 120 days, respectivel y . Dissipatio n followed f irst order kinetics with half -life per iod of 10.81ñ9.97 day s and 13.14ñ12.22 day s in f ield and lab conditio ns. Persis tence of f ipronil in soil was found to be more under laborato ry conditions as compared and f ield conditio ns. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810014753 | |
| dc.language.iso | en | en_US |
| dc.publisher | CCSHAU | en_US |
| dc.sub | Chemistry | |
| dc.subject | Persistence, Fipronil, Soil, Chilli, Half ñlife period | en_US |
| dc.these.type | Ph.D | |
| dc.title | Persistence of fipronil and its metabolites in chilli and soil | en_US |
| dc.type | Thesis | en_US |
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