Persistence of readypre-mix formulation (Chlorpyriphos+Cypermethrin) in/on tomato(Lycopersicon esculentum mill.) and its leaching in soil

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dc.contributor.advisorBeena Kumari
dc.contributor.authorMamta Rani
dc.date.accessioned2017-06-03T03:22:39Z
dc.date.available2017-06-03T03:22:39Z
dc.date.issued2012
dc.description.abstractA f ield exper ime nt was conducted to study the persiste nce behaviour in tomato and soil underneath and ef fect of processing o n the reduction of residues of ready - mix insecticide in tomato f ruits . A laboratory exper ime nt was pe r fomed for assessing the leac hing potential of ready -mix insecticide at two doses in soil (sandy loam) and leachate f ractions . ready -mix 505 (50%chlorpy r iphos+5%cy permethr in) insecticide at single and double doses of 800 and 1600 g ha - 1 was sprayed in the Vegetable Research Farm of Chaudhary Charan Singh (CCS) Hary ana Agr icultural University (HAU), Hisar o n tomato crop (Variety , Hisar Shakti 102) at f ruiting stage. Samples of tomato f ruits and soil were collected per iodically on 0 (1h) , 1, 3, 5, 7, 10 and 15 day s a f ter treatme nts. In leaching expe r iment, ready -mix insecticide was applied as 25Ïg (s ingle dose) and 50 Ïg (double dose) in dif ferent soils packed in plexi glass columns. Residues were estimated by gas chromatograph equipped with capillary column and electron capture detector (ECD). Per cent recover ies at the for tif ication levels of 0.01, 0.10 and 0.25 mg kg - 1 in tomato f ruits and soil were more than 80 per cent depicting validity of methods used for present studies. Limit of detection was 0.003 and 0.010 mg kg -1 for soil and tomato f ruits, respectivel y . Dissipatio n followed a f irst orde r kinetics with half life per iod of 2.93 to 4.43day s at both the doses following f irst o rder kine tics for cy permethr in as well as chlorpy r iphos. Processing was found to be effective in reducing the residues of ready -mix insecticide in tomato f ruits. Was hing followed by boiling was found mo re ef fective in reducing the residues f rom 86.48 to 90.72 perce nt whe reas peeling reduce the residues range f rom 70.68 to 72.93 pe rcent in cy permethrin and 62.58 to 63.92 pe r cent in c hlorpy r iphos at respective doses. For soil unde r tomato crop, half -life per iod was found to be in the range of 2.37 to 3.25 day s at single and double dose in all the treatme nts following f irst orde r kinetics. A leac hing exper ime nt was carr ied out unde r laborato ry conditio ns. The residues of chlorpy r iphos were retained up to 30-35cm soil core whereas residues of cy permethrin retained more than 90 pe r cent in 0-10cm soil core showing their immobility in soil. As residues of chlorpy r iphos and cy permethrin were not detected in any of the leac hate f ractions of soil and doses, he nce safe for ground water.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810014113
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subChemistry
dc.subjectPersistence ready-mix, Chlorpyriphos, Cypermethrin, Dissipation, Half- life period, Processing, Tomato, Soil, Leachingen_US
dc.these.typePh.D
dc.titlePersistence of readypre-mix formulation (Chlorpyriphos+Cypermethrin) in/on tomato(Lycopersicon esculentum mill.) and its leaching in soilen_US
dc.typeThesisen_US
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