Modelling non-systemic pesticide residues in fruits with initial deposit variability and weather effects
- 9 October 2007
- journal article
- research article
- Published by Taylor & Francis Ltd in Food Additives & Contaminants
- Vol. 24 (11), 1257-1267
- https://doi.org/10.1080/02652030701329926
Abstract
A flexible and generic model was developed to predict the decline of residues of a non-systemic pesticide for both single and multi-spray situations as well as for different tree canopy zones. The model predicts not only the average residue levels, but also the confidence interval of the residues through either a deterministic or a stochastic approach. This generic model includes several key aspects of residue fates in the environment: initial deposit, physical loss and growth dilution. The model considers a tree canopy in three distinct zones for which initial deposition of pesticides may differ. In addition to predicting the average residue within each zone, it also estimates the 95 and 99% confidence intervals of residues on individual fruit within each zone. For the purpose of evaluation, this model was parameterized specifically for captan, one of the most important non-systemic fungicides used to control disease in horticultural crops. The observed average initial deposit for each zone was used in the evaluation. The overall correlation between predicted average residues and those observed on apple fruit in two applications was 0.93. Confidence intervals were also predicted accurately.Keywords
This publication has 25 references indexed in Scilit:
- Reliability of measurements of pesticide residues in foodAccreditation and Quality Assurance, 2004
- Sources of uncertainty in pesticide fate modellingScience of The Total Environment, 2003
- Spray deposits and losses in different sized apple trees from an axial fan orchard sprayer: 1. Effects of spray liquid flow rateCrop Protection, 2001
- Within and between field variability of residue data and sampling implicationsFood Additives & Contaminants, 2000
- Determinants of Exposure to Captan in Fruit GrowingAihaj Journal, 1998
- Deposition and Retention of Chlorothalonil Applied to Peanut Foliage: Effects of Application Methods, Fungicide Formulations and Oil Additives1Peanut Science, 1990
- Degradation behavior of captan and folpet on greenhouse tomatoesBulletin of Environmental Contamination and Toxicology, 1988
- DISAPPEARANCE OF CAPTAN FROM FIELD- AND GREENHOUSE-GROWN TOMATO FRUIT IN RELATIONSHIP TO TIME OF HARVEST AND AMOUNT OF RAINFALLCanadian Journal of Plant Science, 1987
- Persistence of captan on apples, grapes, and pears in Ontario, Canada, 1981-1983Journal of Agricultural and Food Chemistry, 1985
- A Mathematical Model of the Spatial and Temporal Dynamics of Chlorothalonil Residues on Potato FoliagePhytopathology®, 1982