International Journal of Chemical Studies
Vol. 6, Issue 2 (2018)
Dissipation pattern of trifloxystrobin 25% + tebuconazole 50% WG (Nativo 75% WG) on cowpea and soil from Western Maharashtra
Author(s): CS Patil, SA Landge, YS Saindane and BV Deore
Abstract: Field experiment was conducted during the year 2016 at the Pulse Improvement Project, MPKV, Rahuri, Dist.- Ahmednagar to determine the residues and dissipation of trifloxystrobin 25% + tebuconazole 50% WG (Nativo 75% WG) in/on cowpea and soil. Two sprays of Nativo 75 WG @ 87.5 + 175 g a. i./ha (350 g ha-1) and 175+350 g a.i./ha (700 g ha-1) were given at an interval of 10 days initiating first spray at pod formation stage. Samples of the immature pods were collected periodically at 0, 1, 3, 5, 7, 10, 15 and 20th day after last spray. The mature pods, mature seeds and soil samples were collected at harvest. The samples were analysed for residues by using validated QuEChERS method on Gas Chromatography Mass spectrometry at AINP on Pesticide Residues, MPKV, Rahuri. The results revealed that average initial residues of trifloxystrobin in immature pods were found to be 0.87 and 1.43 mg/kg and that of tebuconazole were 1.70 and 2.60 µg g-1 at single and double dose and reached BDL on 10th and 15th days, respectively. The half life values of trifloxystrobin were observed to be 1.89 and 2.01 days and those for tebuconazole were 2.00 and 2.00 days, respectively. The residues of trifloxystrobin, its metabolite CGA-321113 and tebuconazole in mature pods, mature seeds and in soil at harvest were found to be BQL. Present studies suggests 10 days pre harvest interval (PHI) for safe consumption of cowpea pods after the application of Nativo 75 WG at 350 g ha-1.
Pages: 2907-2912 | 204 Views 9 Downloads
How to cite this article:
CS Patil, SA Landge, YS Saindane, BV Deore. Dissipation pattern of trifloxystrobin 25% + tebuconazole 50% WG (Nativo 75% WG) on cowpea and soil from Western Maharashtra. Int J Chem Stud 2018;6(2):2907-2912.