title: Minimization of pesticide residues on head lettuce: within-head residue distribution of selected insecticides.
abstract: Pesticide use was simulated to determine the amount and location of pesticide residues within lettuce heads at harvest and to determine whether wrapper leaf removal reduced head residues. Excessive application of insecticides adversely affected head weight and total yield, independent of the direct effects of pests. Highest residues resulted from excessively high field use and minimum preharvest intervals. Wrapper leaf removal resulted in a low or residue-free head across all materials studied.
authors.affiliation: Department of Entomology, University of California, Riverside 92521.
authors.forename: F V
authors.initials: FV
authors.lastname: Sances
authors.forename: N C
authors.initials: NC
authors.lastname: Toscano
authors.forename: L K
authors.initials: LK
authors.lastname: Gaston
mesh_terms: D010573:Pesticide Residues; D014675:Vegetables
chemical_list: D010573:Pesticide Residues