Environmental Monitoring and Assessment

, Volume 44, Issue 1–3, pp 303–313 | Cite as

Degradation of Pesticides on Plant Surfaces and its Prediction - A Case Study on Tea Plant

  • Chen Zongmao
  • Wan Haibin
Article

Abstract

The degradative kinetics of pesticides on plant surface are characterized by an initial rapid degradation which follows a first-order kinetics, then transferred to a more slower degradative rate. The degradative process mainly consists of photodegradation, evaporation, rainfall elution and growth dilution. The influencing parameters of these processes were investigated by using the tea plant as a case study. The predictive model of the initial concentration, photodegradation rate constant, evaporation rate constant, rainfall elution rate, growth dilution rate and the total degradation rate was discussed and verified in four locations situated in the range of 25°-30°N latitude, and acceptable results were obtained.

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Chen Zongmao
    • 1
  • Wan Haibin
    • 1
  1. 1.Tea Research InstituteChinese Academy of Agricultural Sciences, HangzhouZhejiangChina

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