Uptake, distribution, translocation and metabolism of kresoxim-methyl in paddy
Main Article Content
Keywords
Kresoxim-methyl, LC-MS/MS, metabolism, paddy, soil, Strobilurin fungicides
Abstract
Introduction Kresoxim-methyl is a broad spectrum fungicide used for controlling sheath blight and blast in paddy, also downy and powdery mildew diseases in grapes. Objectives A supervised field trial consisting of two experiments viz. soil application and foliar application was conducted in order to study the uptake, distribution, translocation and metabolism of kresoxim-methyl in paddy, treated at the rates of 250 and 500 g a.i. ha-1. Methods Depending on the crop growth and stage (40, 60, 80 and 110 days after transplanting), different plant parts like foliage, shoot, roots, panicles, straw and grain, along with soil, were sampled and analysed using liquid chromatography tandem mass spectrometry for parent compound
kresoxim-methyl and its metabolites. Results The results of the study revealed that there was little translocation of residues of kresoxim-methyl and its acid metabolite to various plants parts, i.e. foliage, roots, soil, shoot and panicle, and very little to straw and grains. Conclusion The major route of metabolism was hydrolysis with formation of acid metabolite.
References
Anonymous. (2000) Evaluation of the new activekresoxim-methyl in the product STROBY WG Fungicide, by National Registration Authority for Agricultural and Veterinary Chemicals, Available at http://www.apvma.gov.au/registration/assessment/docs/prs_kresoxim.pdf [Last accessed30 January 2012].
Cabras P., Angioni A., Garau V.L., Melis M., Pirisi F.M., MinelliE.V., Cabitza F., Cubeddu M. (1997) Fate of new fungicides (cyprodinil, fludioxonil, pyrimethanil and tebuconazole)from vine to wine.Journal of Agricultural and food chemistry,45, 2708–2710.
Cabras P., Angioni A., Garau V.L., Pirisi F.M., Brandolini V.(1998a) Gas chromatography determination of azoxystrobin, fluazinam, kresoxim-methyl, mepanipyrim, and itraconazole in grapes, must, and wine. Journal of AOACInternational,81, 1185–1189.
Cabras P., Angioni A., Garau V.L., Pirisi F.M., Espinoza J., Mendoza A., Cabitza F., Pala M., Brandolini V. (1998b) Fate of azoxystrobin, fluazinam, kresoxim-methyl, mepanipyrim, and tetraconazole from vine to wine.Journal of Agricultural and Food Chemistry,46, 3249–3251.
Carla S., James K.J. (2007) Capabilities of different liquid chromatography tandem mass spectrometry systems in determining pesticide residues in food application to estimate their daily intake.Journal of Chromatography. A,1157, 73–84.
De Melo Abreu S., Correia M., Herbert P., Santos L., Alves A.(2005) Screening of grapes and wine for azoxystrobin, kresoxim-methyl and trifloxystrobin fungicides by HPLC with diode array detection.Food Additives and Contaminants,22, 549–556.
EEC. (2004) Informal coordination of MRLs established in directives 76/895/EEC, 86/362/EEC, 86/363/EEC, and90/642/EEC 5058/VI/98. Available at http://www.ec.europa.eu/food/plant/protection/resources/09-99-2.pdf [Last accessed 25 October 2012].
Navalon A., Prieto A., Araujo L., Vilchez J.L. (2002)Determination of pyrimethanil and kresoxim-methyl in green groceries by headspace solid-phase microextraction and gas chromatography-mass spectrometry.Journal of chromatography. A,975, 355–360.
Navickiene S., Ribeiro M.L. (2001) A simplified method for the gas chromatographic determination of pyrimethanilresidues in fruits.Journal of Separation Science,24,470–472.
Robert T.R., Hutson D.H. (1998)Metabolic Pathways of agrochemicals – Part 2: Insecticides and Fungicides(4th edn.), pp. 1338, Royal Society of Chemistry, Cambridge, UK.
Tomlin C.D.S. (2006)The Pesticide Manual(14th edn.), pp.636–637, British Crop Protection Council, Hampshire, UK.
Wong J., Halverson C. (1999) Multiresidue analysis of pesticides in wines using C-18 solid-phase extraction and gas chromatography-mass spectrometry.American Journal ofEnology and Viticulture,50, 435–442.
Article Sidebar
Article Details
