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Behavior of trifloxystrobin and tebuconazole on onion under semi arid climatic conditions

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Title Behavior of trifloxystrobin and tebuconazole on onion under semi arid climatic conditions
Not Available
 
Creator Mohapatra, S.
 
Subject Onion, persistence, residues, tebuconazole, trifloxystrobin
 
Description Not Available
The persistence and dissipation kinetics of trifloxystrobin and tebuconazole on onion were studied after application of their combination formulation at a standard and double dose of 75 + 150 and 150 + 300 g a.i. ha−1. The fungicides were extracted with acetone, cleaned-up using activated charcoal (trifloxystrobin) and neutral alumina (tebuconazole). Analysis was carried out by gas chromatograph (GC) and confirmed by gas chromatograph mass spectrometry (GC-MS). The recovery was above 80% and limit of quantification (LOQ) 0.05 mg kg−1 for both fungicides. Initial residue deposits of trifloxystrobin were 0.68 and 1.01 mg kg−1 and tebuconazole 0.673 and 1.95 mg kg−1 from standard and double dose treatments, respectively. Dissipation of the fungicides followed first-order kinetics and the half life of degradation was 6–6.6 days. Matured onion bulb (and field soil) harvested after 30 days was free from fungicide residues. These findings suggest recommended safe pre-harvest interval (PHI) of 14 and 25 days for spring onion consumption after treatment of Nativo 75 WG at the standard and double doses, respectively. Matured onion bulbs at harvest were free from fungicide residues.
Not Available
 
Date 2019-03-18T06:47:14Z
2019-03-18T06:47:14Z
2014-05-09
 
Type Journal
 
Identifier 15
0360-1234 (Print); 1532-4109
http://krishi.icar.gov.in/jspui/handle/123456789/17353
 
Language English
 
Relation Not Available;
 
Publisher Taylor & Francis