PERSISTENCE AND DISSIPATION PATTERN OF SOME ORGANOPHOSPHORUS INSECTICIDES ON CAULIFLOWER AND BRINJAL: A GAP SUPERVISED FIELD STUDY

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dc.contributor.advisorPATIYAL, S.K.
dc.contributor.authorBRAR, GAGANPREET SINGH
dc.date.accessioned2018-07-12T12:00:06Z
dc.date.available2018-07-12T12:00:06Z
dc.date.issued2018-06-05
dc.description.abstractABSTRACT The present investigation entitled “Persistence and dissipation pattern of some organophosphorus insecticides on cauliflower and brinjal: A GAP supervised field study” was carried out in the Department of Entomology, Dr. Y S Parmar University of Horticulture and Forestry, Nauni, Solan (HP). The QuEChERS method was validated for intended use in the laboratory. Insecticides were applied at single dose and double dose on cauliflower and brinjal crop. On cauliflower, acephate was applied @ 560 and 1120 g a.i. ha-1, ethion @ 500 and 1000 g a.i. ha-1, quinalphos @ 250 and 500 g a.i. ha-1 and triazophos @ 500 and 1000 g a.i. ha-1. On brinjal, chlorpyrifos was applied @ 300 and 600 g a.i. ha-1 and ethion @ 500 and 1000 g a.i. ha-1. The persistence study on cauliflower curds revealed initial deposits 1.436, 1.064, 0.808 and 2.017 mg kg-1 of acephate, ethion, quinalphos and triazophos, respectively at single dose. At double dose the initial deposits of acephate, ethion, quinalphos and triazophos were 2.523, 1.823, 1.371 and 3.813 mg kg-1, respectively. Acephate and triazophos persisted in cauliflower curds upto 7 and 10 days at single and double dose, respectively. Whereas, ethion and quinalphos persisted for 5 days at single dose and 7 days at double dose. Chlorpyrifos initial deposits on brinjal fruits were 1.096 mg kg-1 and 1.982 mg kg-1 at single and double dose, respectively, which persisted for 7 and 10 days. Ethion the initial residues on brinjal fruits were 0.861 and 1.637 mg kg-1 when sprayed at single and double dose which persisted up to 5 and 7 days, respectively. The safe waiting periods for the harvesting of the cauliflower curds were suggested as 9.90, 1.36, 6.44 and 11.43 days for acephate, ethion, quinalphos and triazophos, respectively. Safe waiting periods 7.13 and 1.33 days suggested for chlorpryifos and ethion on brinjal, respectively. Acephate persisted for 1 day whereas ethion, quinalphos and triazophos persisted for 3 days in cauliflower field soil. Residues of chlorpyrifos and ethion were persisted for 3 days in brinjal field soil. Among various decontamination processes microwave and open pan cooking were found more effective in removing pesticide residues in cauliflower curds and brinjal fruits. Survey studies revealed that most of the farmers were not aware about the recommendation of the pesticides on cauliflower and brinjal and take advice from pesticide dealers or company representatives.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810059557
dc.keywordscauliflower and brinjal,organophosphorus insecticides ,Persistence and dissipation patternen_US
dc.language.isoenen_US
dc.pages170en_US
dc.publisherUHF,NAUNIen_US
dc.subEntomologyen_US
dc.themecauliflower and brinjal,organophosphorus insecticides ,Persistence and dissipation patternen_US
dc.these.typePh.Den_US
dc.titlePERSISTENCE AND DISSIPATION PATTERN OF SOME ORGANOPHOSPHORUS INSECTICIDES ON CAULIFLOWER AND BRINJAL: A GAP SUPERVISED FIELD STUDYen_US
dc.typeThesisen_US
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