Development and application of a numerical dynamic model for pesticide residues in apple orchards
- 28 April 2022
- journal article
- research article
- Published by Wiley in Pest Management Science
- Vol. 78 (6), 2679-2692
- https://doi.org/10.1002/ps.6897
Abstract
BACKGROUND Limited understanding of the fate of pesticides in apple orchards may lead to recurring pests or pose risks to food safety. In this study, through a field experiment conducted in an apple orchard, a dynamic plant uptake model, coupled with a soil water model, was developed to simulate measured pesticide concentrations in soil and different plant compartments. RESULTS Results showed that the overall model could adequately describe the data set of four pesticides in the apple orchard. An estimated 15%-24.7% of applied pesticides were deposited on leaves and 0.37%-0.58% on fruits. Decreasing pesticide concentrations in fruits were observed after pesticide application, with 9.6%-64.8% of this decrease explained by biodegradation, 29.8%-75.8% by fruit growth dilution and 11.3%-47.6% by wash-off. Furthermore, a first estimation of dietary risks indicated that ingestion of the apples may not represent an acute or chronic risk to human health. CONCLUSION The dynamic plant uptake model, coupled with the tipping buckets soil water model, could successfully be fitted to describe to the data set for the fate of four pesticides applied in an apple orchard. The contribution of different pathways to pesticide concentration was highly influenced by precipitation, fruit growth dilution and the characteristics of different pesticides. This model can improve our understanding of pesticide fate in apple orchards and has great potential for supporting food safety assessment and decision-making to minimize impacts arising from pesticide applications. (c) 2022 Society of Chemical Industry.Keywords
Funding Information
- National Basic Research Program of China
- China Scholarship Council (2016YFD0200206)
This publication has 69 references indexed in Scilit:
- Reevaluate Pesticides for Food Security and SafetyScience, 2013
- Simultaneous Simulations of Uptake in Plants and Leaching to Groundwater of Cadmium and Lead for Arable Land Amended with Compost or Farmyard ManurePLOS ONE, 2012
- Plant uptake of pesticides and human health: Dynamic modeling of residues in wheat and ingestion intakeChemosphere, 2011
- Uptake and persistence of pesticides in plants: Measurements and model estimates for imidacloprid after foliar and soil applicationJournal of Hazardous Materials, 2009
- The Presence of Dialkylphosphates in Fresh Fruit Juices: Implication For Organophosphorus Pesticide Exposure and Risk AssessmentsJournal of Toxicology and Environmental Health, Part A, 2005
- Off target ground deposits from spraying a semi-dwarf orchardCrop Protection, 1999
- Field deposit patterns of a diflubenzuron spray mix, after application to an apple orchard using an air-blast sprayer; and a laboratory evaluation of physical properties and atomization characteristicsJournal of Environmental Science and Health, Part B, 1989
- Persistence of captan on apples, grapes, and pears in Ontario, Canada, 1981-1983Journal of Agricultural and Food Chemistry, 1985
- Spray retention and distribution on apple treesPesticide Science, 1981
- GROWTH-DILUTION AS A FACTOR IN THE DECLINE OF PESTICIDE RESIDUES ON ALFALFA-GRASS FORAGECanadian Journal of Plant Science, 1964