Acaricide Residues, Persistence of Residues of 2,3-p-Dioxanedithiol S,S-bis(O,O-diethyl Phosphorodithioate) as an Acaricide on and in Mature Lemons and Oranges

Abstract

Residues of the acaricidal material 2,3-p-dioxanedithiol S,S-bis(0,0-diethyl phosphorodithioate) (Hercules AC-528) on navel oranges and lemons have been evaluated, using a semispecific colorimetric procedure. Half-life values for persisting residues of the acaricide on field-sprayed navel oranges and lemons were determined to be about 95 and 85 days, respectively. Less than 0.03 p.p.m. of this material was found in the edible portion of the fruit.