Department of Entomology, College of Agriculture, Rajendranagar, Hyderabad-500030.
The field experiment laid out with okra (Abelmoschus esculentus Linn.) to study dissipation and decontamination of three insecticides viz., monocrotophos (0.05%), carbaryl (0.15%) and fenvalerate (0.02%) indicated that the dissipation by 7th day was 100% in fenvalerate. Monocrotophos residues on 10th day were found to be 2.29 ppm which are above MRI, and hence considered to be highly persistent.
The treatment of fruits with 2% tamarind solution dip for 5 min. followed by tap water wash and steam cooking for 10 min. was found to remove the residues of monocrotophos, carbaryl and fenvalerate to an extent of 41.81, 100 and 100 per cent, respectively. Treatment with 2% salt solution was also equally effective.
