COMPARISON OF PESTICIDE AND PARTICULATE RECOVERIES WITH THE VACUUM AND DISLODGEABLE SURFACE PESTICIDE-RESIDUE TECHNIQUES

The dislodgeable and vacuum surface residue techniques were compared for the quantity of pesticide residue and quantity and quality of particulate matter removed from 'Valencia' orange leaves. Data trends for dislodgeable and vacuum parathion and paraoxon residues were correlated at r{slanted equal to or greater-than}0.95 for both emulsifiable concentrate and wettable powder formulations. The amount of pesticide residue and particulate matter obtained was dislodgeable > glass fiber filter > 5.0 μ filter > 0.8 μ filter. The flow rate of the filter was correlated with the amount of residue removed. The quality of particulate matter as judged by size analyses was equal The dislodgeable technique removed about five times more particulate material and about eleven times more pesticide residue compared to the vacuum technique. © 1979 Springer-Verlag New York Inc.