Skip to Main content Skip to Navigation
Theses

Phototransformation d'herbicides tricétoniques et d'insecticides pyréthrinoïdes à la surface des végétaux

Abstract : When crops are sprayed with pesticides, the leaves are covered with fine droplets containing the active ingredient. Pesticides can then be broken down by sunlight. We showed in this work that mesotrione and sulcotrione herbicides as well as cypermethrine and deltamethrine insecticides are photolabile when sorbed on cuticular waxes. The pesticide photolysis rate can both increase or decrease, if additives from commercial fomulations are added. However, we could not find a general rule that could predict the importance of the phototransformation for any pesticide. Moreover, while phototransformation was the only dissipation process during experiments in the laboratory, other dissipation processes, such as diffusion through the plant cuticle or wash off by rain or dew, can compete and even become predominant in field studies.
Document type :
Theses
Complete list of metadatas

Cited literature [103 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00731153
Contributor : Camille Meyer <>
Submitted on : Wednesday, September 12, 2012 - 11:24:00 AM
Last modification on : Friday, October 23, 2020 - 4:49:21 PM
Long-term archiving on: : Friday, December 16, 2016 - 12:04:07 PM

Identifiers

  • HAL Id : tel-00731153, version 1

Citation

Delphine Lavieille. Phototransformation d'herbicides tricétoniques et d'insecticides pyréthrinoïdes à la surface des végétaux. Chimie organique. Université Blaise Pascal - Clermont-Ferrand II, 2008. Français. ⟨tel-00731153⟩

Share

Metrics

Record views

401

Files downloads

1128