Analysis Of Trifloxystrobin In Tea

The kinetic equation, half-life values, correlation coefficient and pre-harvest interval (PHI) of the trifloxystrobin and tebuconazole residue dissipation were calculated from the experimental data and summarized in Table 4. The dissipation dynamics of trifloxystrobin on green tea leaves followed a first-order rate equation as follows C = 2.5472e-0.245x (r=0.9797) and C = 6.5457e-0.207x (r= 0.9804) with the half-life of 2.83 and 3.34 days for trifloxystrobin at RD and DRD, respectively. The half-life of trifloxystrobin in processed tea was 2.74 and 3.63 days respectively for 31.25 and 62.50 g a.i./ha and its dissipation dynamics were C = 5.5593e-0.253x and C = 9.8395e-0.191x. The calculated half-lives for tebuconazole were in a range of 2.98 to 3.36 and 3.01 to 3.07 days from the treatment at 62.50 and 125.0 g a.i./ha, respectively for green tea leaves and processed tea. The half-lives of mixed formulation consisting of trifloxystrobin and tebuconazole in the present study was similar to those of gherkin reported by Paramasivam, Selvi, Deepa, Jayaprakash and Chandrasekaran (2015) who observed half-lives were in the range of 3.31-3.38 and 3.0-3.04 days at different doses and slight variation was found the results studied in ginseng (5.92-9.76 and 4.59-7.53 days) reported by Wang, Gao, Liu, Cui and Li (2015). The half-lives of trifloxystrobin and tebuconazole on grape
Similar PHI results were reported by Mohapatra (2015a) and Paramasivam, Selvi, Deepa, Jayaprakash and Chandrasekaran (2015) for gherkin in the range of 12-14 days and 14- 20 days for mango (Mohapatra, 2015) and 14 to 25 days for spring onion (Mohapatra, 2014). Based on this study, the PHI of 23 days may be recommended for consumption of tea after treatment of the combination formulation of trifloxystrobin and tebuconazole at the recommended