Evaluation of pesticide losses during cereal crop spraying in Tunisian conditions
Résumé
In Tunisia, crop spraying is conducted under poorly controlled conditions. Important pesticide amounts are transferred in environment, with negative impacts in ecosystem, health and economy. An original method was developed to assess spray losses during cereal pesticide application, under field and laboratory conditions in Tunisian context. Some natural and artificial collectors were used to trap the droplets containing a fluorescent tracer dye (Brilliant SulphoFlavine: BSF). Four test series were carried out, in wind tunnel and field conditions, under two configurations, to assess spray drift and deposits under the sprayer boom, using a classic flat fan nozzle. The average captured under the boom was 30% to 65% of the sprayed tracer dose on the ground and 3% to 15,5% on plants. In the atmosphere, it varied between 8% and 16% of this same volume.
Domaines
Sciences de l'environnementOrigine | Fichiers produits par l'(les) auteur(s) |
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