Residues of Fluvalinate and Permethrin on Flue-cured Tobacco

Abstract

High-performance liquid chromatography (HPLC) with C18 reverse-phase columns was used to determine residues of fluvalinate and permethrin applied in the field to flue-cured tobacco in 1980 and 1981. Methods were developed to determine residue levels in both green and cured samples. In 1980 field tests, residues of fluvalinate applied at rates of 0.1 and 0.2 kg/ha averaged 3.3 and 7.2 ppm, respectively, on green tobacco harvested immediately after application, and declined to 0.3 and 2.7 ppm by 12 days after application. In 1981, with the same application rates, residues averaged 1.7 and 3.0 ppm (0 time) and declined to 0.4 and 0.5 ppm after 16 days, respectively. A new formulation of fluvalinate, applied at 0.06 and 0.01 kg/ha, averaged 0.9 and 1.3 ppm on day 0 and declined to 0.3 and 0.6 ppm after 16 days, respectively. Flue curing reduced fluvalinate residues approximately by 61 % both years. Immediately after application, residues of permethrin, applied at 0.2 kg/ha, averaged 9.6 ppm in 1980 and at application rates of 0.1 and 0.2 kg/ha averaged 3.5 and 3.8 ppm, respectively, in 1981. Residues declined to 7.0 ppm after 12 days in 1980 and to 3.2 and 3.5 ppm after 16 days in 1981. Losses of permethrin due to curing averaged 67 %.

Insecticide Residues in the Ambient Air of Commercial Pest Control Buildings, 1993

“…Pyrethroid insecticides are often persistent and remain for long periods of time, A study of the persistency of permethrin and fluvalinate residues on tobacco, flue-cured by conventional means showed losses averaging 65% during a process where leaves are heated gradually to temperatures of ca. 65°C (Leidy et al 1986). In addition, small quantities of cypermethrin were detected (ca.…”

Determination of Acaricides in Honey by Liquid Chromatography with Ordinary, Narrow-Bore, and Microbore Columns

“…Traditionally, the analysis of acaricides is carried out by means of gas chromatography, employing an electron capture detector, a nitrogen−phosphorus detector, or a mass spectrometer detector subsequent to liquid−liquid or solid−liquid extraction of the active principles. − High-performance liquid chromatography has hardly been used − to analyze these compounds, since its implementation with UV detection brings about a decrease in sensitivity.…”

Small-scale method for the determination of permethrin residue on cattle hair by gas-liquid chromatography with electron capture detection

“…Various GC methods for permethrin residue analysis in different matrices have been reported (Williams, 1976;Oehler, 1979;Carroll et al 1981; Chapman et al, 1981; Reichel et al, 1981;Braun and Stanek, 1982;Marie et al, 1982;Hansen et al, 1983;Schimmel et al, 1983). Other workers have reported HPLC methods as alternatives to GC for analyzing permethrin (Kikta and Shierling, 1978;Lam and Grushka, 1978;Papadopoulou-Mourkidou et al, 1980,1983Rando and Hammad, 1985;Sundaram et al, 1985; Leidy et al, 1986), but none pertain to cattle hair. However, several reports discuss the quantitation of pyrethroids in cattle hair, but without detailed procedures (Taylor et al, 1985a(Taylor et al, ,b, 1986; Kumar et al, 1986).…”