Residual dynamics of azoxystrobin and combination formulation of trifloxystrobin 25% + tebuconazole 50%-75 W G on isabgol (Plantago ovata Forssk.) and soil

Publication date: Available online 12 October 2019Source: Journal of Applied Research on Medicinal and Aromatic PlantsAuthor(s): Ajoy Saha, Chintan Makwana, Ram Prasnna Meena, Ponnuchamy ManivelAbstractTo elucidate the fate of azoxystrobin and combination formulation of trifloxystrobin and tebuconazole in isabgol ecosystem, a simple and efficient analytical method was developed using QuEChERS (quick, easy, cheap, effective, rugged and safe) extraction method combined with gas chromatography followed by electron capture and nitrogen-phosphorus detection. The method gave very good overall mean recoveries in the range of 69–91%. The limit of quantification were 65, 25, 40 µg kg-1 for azoxystrobin, trifloxystrobin and tebuconazole in isabgol herbage, respectively. The values for corresponding fungicide in soil were 50, 25 and 25 µg kg-1, for isabgol seed with husk were 80, 50 and 75 µg kg-1, respectively. The results revealed that the dissipation pattern of studied fungicides in the soil and isabgol herbage followed first-order kinetics. The half-life of trifloxystrobin in isabgol herbage were shorter (3.0–3.3 days) than tebuconazole (5.1–5.6 days) and azoxystrobin (5.5–7.7 days). Similarly soil half-lives were also shorter for trifloxystrobin (5.0-6.1 days) as compared to tebuconazole (7.9-8.6 days) and azoxystrobin (8.4-10.0 days). The residues of these fungicides in soil, isabgol herbage and seed with husk at harvest were below the detectable level which suppo...
Source: Journal of Applied Research on Medicinal and Aromatic Plants - Category: Complementary Medicine Source Type: research