Dynamic plant uptake model applied for drip irrigation of an insecticide to pepper fruit plants.

Charlotte Nielsen Legind, C. M. Kennedy, Arno Rein, N. Snyder, Stefan Trapp

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    Abstract

    BACKGROUND: Drip application of insecticides is an effective way to deliver the chemical to the plant that avoids off-site movement via spray drift and minimizes applicator exposure. The aim of this paper is to present a cascade model for the uptake of pesticide into plants following drip irrigation, its application for a soil-applied insecticide and a sensitivity analysis of the model parameters. RESULTS: The model predicted the measured increase and decline of residues following two soil applications of an insecticide to peppers, with an absolute error between model and measurement ranging from 0.002 to 0.034 mg kg fw—1. Maximum measured concentrations in pepper fruit were approximately 0.22 mg kg fw—1. Temperature was the most sensitive component for predicting the peak and final concentration in pepper fruit, through its influence on soil and plant degradation rates. CONCLUSION: Repeated simulations of pulse inputs with the cascade model adequately describe soil pesticide applications to an actual cropped system and reasonably mimic it. The model has the potential to be used for the optimization of practical features, such as application rates and waiting times between applications and before harvest, through the integrated accounting of soil, plant and environmental influences. Copyright © 2011 Society of Chemical Industry
    Original languageEnglish
    JournalPest Management Science
    Volume67
    Issue number5
    Pages (from-to)521-527
    ISSN1526-498X
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Pesticide
    • Residues
    • Plant protection
    • Insecticide
    • Matrix
    • Crops

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