THE FATE OF DICHLORVOS (DDVP) IN FIELD-TREATED FOUR MATURITY STAGES OF DATES

Abstract

The fate of dichlorvos (DDVP) on dates after application in the field has been investigated.Two methods of application with two different concentrations were used, the traditional aerialapplication of 0.15% DDVP and a new method which is called the surgical method, with the new method 0.25% DDVP was directly applied into a hole in the trunk of the tree. Residues were determined using GC-ECD after extraction of the fruits DDVP residues detected in Khalal fruits (mature full coloured stage) using aerial and surgical methods were 192.9±1.9 and 352.0 ±5.6 ng/g, respectively. For Rutab fruits (soft brown stage) DDVP residues were 24.05 ±0.87 and 50.21 ±3.6ng/g, respectively. No residues were detected in the mature Tamer fruits (hard raisin-like stage)