Journal of Economic Entomology · 1990 · 18 citations · 0 references
AgricultureChemistryCrop ProtectionHerbicide ChemistryPesticide ToxicologyPesticide ChemistryPesticide Residue AnalysisPrecision Spraying TechnologiesSpray DepositionDepositionsDetection Limit AssessmentDetection Limit EstimationInstrument Detection LimitMethod Detection LimitPesticide DetectionSpray Deposition AssessmentSpray Deposition Measurement
A technique for studying pesticide deposit on natural targets using two optically resolvable water-soluble food dyes is described. Flolene FD&;C Blue No.1 and Flolene FD&;C Yellow No.6 can be retrieved from a natural surface (green pepper leaves) and subsequently resolved spectrophotometrically. The ability to resolve two dyes from a single leaf surface eliminates variability due to leaf surface orientation and position within the plant and allows precise comparison of different spray technologies. The system described has a detection limit of ≈ 0.1 ppm. These dyes are safe, water-soluble, and inexpensive tools for research involving comparison and quantification of spray depositions.