Persistence and Residues of a Combi Product of Trifloxystrobin and Tebuconazole on Banana

A field experiment was conducted to study the persistence and residues of trifloxystrobin and tebuconazole in banana fruits following foliar application of their combination product Nalivo 75 WG @ 350 and 700 g a.i. ha⁻¹. Banana fruits were analyzed with and without peel. Trifloxystrobin residues persisted till 10^th and 15^th day after the last spray on banana with peel at standard and double doses, respectively. The corresponding persistence of trifloxystrobin in banana pulp was up to 7^th day at both the doses. CGA 321 113, a metabolite of trifloxystrobin was not detected in banana throughout the experiment. In case of tebuconazole, the persistence in banana with peel was noticed till 5^th and 7^th day at standard and double doses, respectively. The corresponding persistence in banana pulp was up to the 5^th day at both the doses of application. Soil samples collected at harvest did not contain residues of any of the two pesticides above determination limit. Half-lives of trifloxystrobin and tebuconazole in banana ranged from 1.6–2.0 and 1.9–4.7 days, respectively.