Dissipation Kinetics of Trifloxystrobin and Tebuconazole on Chili and Soil

Abstract

Dissipation of trifloxystrobin and tebuconazole were studied following two applications of a combination formulation of Nativo 75 WG (trifloxystrobin 25% + tebuconazole 50%) @ 250 and 500 g ha(-1) at 10 days interval. Samples of chili were collected at 0, 1, 3, 5, 7, 10 and 15 days after the last application. Red chili and soil samples were collected after 20 days of last application. Half-life period for trifloxystrobin were found to be 1.81 and 1.58 days and for tebuconazole these values were observed to be 1.37 and 1.41 days, respectively, at single and double the application rates. Trifloxystrobin residues dissipated below its limit of quantification (LOQ) of 0.01 mg kg(-1) after 5 and 7 days, respectively, at single and double the application dosages whereas tebuconazole residues took 7 and 10 days, respectively. Red chili & soil samples collected after 20 days did not reveal the presence of trifloxystrobin and tebuconazole at their determination limit of 0.01 mg kg(-1).

Residue Dynamics and Risk Assessment of Trifloxystrobin and Tebuconazole on Tomato (<i>Lycopersicon esculentum</i> Mill.)

“…Soil samples collected after 15 days did not reveal the presence of trifloxystrobin and its metabolite CGA 32113 at determination limit of 0.05 mg kg -1 . These results were in agreement with findings of earlier workers [13], who reported initial deposits of trifloxystrobin on chilli to be 0.31 and 0.59 mg kg -1 , following two applications of Nativo 75 WG @ 250 and 500 g ha -1 , and residues dissipated with half life of 1.81 and 1.58 days, respectively. Similarly, 0.30 and 0.87 mg kg -1 initial deposits of trifloxystrobin were reported on grapes at single (175 g ha -1 )and double dose (350 g ha -1 ) of Nativo 75 WG, respectively [10].…”

“…On grapes, the average initial deposit of tebuconazole were estimated to be 0.53 and 1.22 mg kg -1 , following four application of Nativo 75 WG (trifloxystrobin 250+ tebuconazole 500 g mg -1 ) at 175 and 350 g ha -1 , respectively which were in conformity with results of the present study [10]. Similarly, initial deposits of tebuconazole on chilli were found to be 0.95 and 1.88 mg kg -1 , respectively, following two application of Nativo 75WG (trifloxystrobin 25%+ tebuconazole 50%) @ 250 and 500 g ha -1 , which dissipated with half life values of 1.37 and 1.41 days, respectively [13]. However, the dissipation study of tebuconazole in peppermint revealed that three applications of tebuconazole @ 125 and 250 g a.i.…”

Determination of Persistence of Fungicide in Seeds and Seedlings of Sunflower

“…Similar gradual decrease in fungicide residues after application on crop was reported earlier by Sahoo et al, (2012) in chilli and Malhat (2013) in tomato. The previous studies of various scientists were mainly focussed on the topics like pesticide residue dissipation and safe consumption intervals after pesticidal spray on vegetables, fruits and other food crops.…”

Track of fate and primary metabolism of trifloxystrobin in rice paddy ecosystem

“…Owing to the broad-spectrum activity and outstanding environmental tolerability, trifloxystrobin has been marketed globally for several years, and also has been widely applied to control fungal diseases in various crops such as wheat (Kaur et al, 2012), apple (Patyal et al, 2013), grape (Jyot et al, 2010), onion (Mohapatra, 2014), and typically in rice cultivation to ensure yields (Chen et al, 2014). However, profiles of residual pattern of trifloxystrobin in environment, particularly in the rice paddy ecosystem, are poorly understood (Kaur et al, 2012;Mohapatra, 2014;Sahoo et al, 2012). Furthermore, disclosure of the fate of trifloxystrobin in rice paddy ecosystem would be an appropriate indicator for understanding of its ecological risk and the side effect on human beings.…”

“…In addition, gas chromatography (GC) (Jyot et al, 2010;Kaur et al, 2012;Mohapatra, 2014;Sahoo et al, 2012), liquid chromatography with tandem mass spectrometry (LC-MS/MS) (Chen et al, 2014), ASE-LC-MS/MS (Chen et al, 2008) and immunochemical methods (Mercader et al, 2014) have been developed to analyze trifloxystrobin in foodstuffs. Nevertheless, few methodologies were available for rapid analysis of trifloxystrobin in environmental samples (Chen et al, 2014).…”