Evaluation of decontamination methods for removal of pesticide residues from tomato Solanum lycopersicum
Sudhakar S Kelageri, Cherukuri Sreenivasa Rao, Vemuri Shashi Bhushan and Pothula Narayana Reddy
The study has been designed to determine the extent of pesticide residues removal from tomato fruits through common house hold practices. Experiment was conducted during 2013-14, kharif season. Tomato crop was planted in student’s farm, College of Agriculture, Rajendranagar, Hyderabad. The most commonly used pesticides such as dimethoate, lambda cyhalothrin, phosalone, flubendiamide, and profenophos were sprayed twice at recommended doses first at fruit formation stage and 10 days after first spray. Samples were collected at 2 hours after second spray to quantify the deposits further samples were subjected to various household treatments, each in three replications, and analysed for residues using validated QuEChERS method and using GC-ECD, (GAS Chromatography Electron capture detector), Thermionic Specific Detector (TSD) and Liquid Chromatograph with Photo Diode Array (PDA) Detector so as to estimate the per cent removal and their effectiveness. Out of all treatments, veggy wash a formulation prepared by AINP on Pesticide Residues proved to be the most efficient by removing pesticides residues in the range of 55-76%. The next promising treatment was 4% acetic acid solution (52-71%), flowed by 2% salt solution (39-58%), 0.1% baking soda solution (39-52%) and tap water (17-39%).