title: Preharvest Interval Periods and their relation to fruit growth stages and pesticide formulations.
abstract: The aim of this study was to evaluate the effect of pesticide formulations and fruit growth stages on the Pre-harvest Interval Period (PHI). Results showed that pesticide formulations did not affect the initial deposit and dissipation rate. However, the fruit growth stage at the application time showed a significant effect on the above-mentioned parameters. Fruit diameter increases in one millimeter pesticide dissipation rates were reduced in -0.033mgkg-1day-1(R2=0.87; p<0.001) for grapes and -0.014mgkg-1day-1(R2=0.85; p<0.001) for apples. The relation between solar radiation, air humidity and temperature, and pesticide dissipation rates were dependent on fruit type. PHI could change according to the application time, because of the initial amount of pesticide deposit in the fruits and change in the dissipation rates. Because Maximum Residue Level are becoming more restrictive, it is more important to consider the fruit growth stage effects on pesticide when performing dissipation studies to define PHI.
authors.affiliation: Estación Experimental SIDAL, El Encanto 455 Dpto 203, Viña del Mar, Chile. Electronic address: calister@sidal.cl.
authors.forename: Claudio
authors.initials: C
authors.lastname: Alister
authors.affiliation: Estación Experimental SIDAL, El Encanto 455 Dpto 203, Viña del Mar, Chile. Electronic address: maraya@sidal.cl.
authors.forename: Manuel
authors.initials: M
authors.lastname: Araya
authors.affiliation: Estación Experimental SIDAL, El Encanto 455 Dpto 203, Viña del Mar, Chile. Electronic address: kbecerra@sidal.cl.
authors.forename: Kevin
authors.initials: K
authors.lastname: Becerra
authors.affiliation: DATAChem Agrofood Group, Escuela de Ingeniería de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716, Valparaíso, Chile. Electronic address: jorge.saavedra@pucv.cl.
authors.forename: Jorge
authors.initials: J
authors.lastname: Saavedra
authors.affiliation: Estación Experimental SIDAL, El Encanto 455 Dpto 203, Viña del Mar, Chile. Electronic address: mkogan@sidal.cl.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Kogan
mesh_terms: D004339:Drug Compounding; D005506:Food Contamination / Q000032:analysis*; D005638:Fruit / Q000187:drug effects / Q000254:growth & development; D027845:Malus / Q000187:drug effects* / Q000254:growth & development*; D010573:Pesticide Residues / Q000032:analysis; D010575:Pesticides / Q000032:analysis* / Q000494:pharmacology; D027843:Vitis / Q000187:drug effects* / Q000254:growth & development*
chemical_list: D010573:Pesticide Residues; D010575:Pesticides
keywords: Acetamiprid; Apples; Buprofezin; Fenhexamid; Grapes; Residues