Photodegradation of Pesticides on Plant and Soil Surfaces

  • Toshiyuki Katagi
Part of the Continuation of Residue Reviews book series (RECT, volume 182)


Sunlight photodegradation is one of the most destructive pathways for pesticides after their release into the environment. Plant surfaces, especially leaf surfaces, are the first reaction environment for a pesticide molecule after application, and spray drift would indirectly present a similar situation. Photolysis on soil surfaces becomes important when a pesticide is directly applied to soil or not significantly intercepted by plants, providing that the leaf cover does not shade the ground from sunlight. Because the foliar interception of pesticides depends on plant species and usually increases with their growth stage (Linders et al. 2000), the importance of soil photolysis is considered to be lessened when plants become mature. Spray drift after pesticide application or washoff from plants by rain is the indirect route by which a pesticide reaches the soil.


Humic Substance Clay Surface Direct Photolysis Soil Thin Layer Ester Cleavage 
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Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • Toshiyuki Katagi
    • 1
  1. 1.Environmental Health Science LaboratorySumitomo Chemical Co., Ltd.Takarazuka, HyogoJapan

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