Evaluation of Methodologies for Field Studies of Spray Deposition
ABSTRACT USING Rhodamine-B and copper as tracers, four common methods of deposition assessment, i.e., combinations of fluorometry and colorimetry on leaf and mylar targets were compared for use on citrus. Merits and limitations of each method were identified. All were found to be reliable; however, considering limitations in the lab and in the field, colorimetric analysis of leaf samples appeared to be the most desirable method for deposition or residue assessment in citrus spraying.