The objectives of the present study were to evaluate the safety of mixer/loaders and applicators of paraquat to maize crop by knapsack sprayers and to determine the efficacy of safety measures applied to the sprayers.
Potential dermal exposure (PDE) was evaluated in 22 worker body parts.
The Cu2+cation of a copper-based fungicide was used as tracer in the spray solution.
Sanitary pads and cotton gloves were used to collect the pesticide solution on the sampled body parts.
It was observed that paraquat application in front of the applicator's body (0.5 and 1.0 m lance) is unsafe because PDE was 1,979.8 ml/day (for 0.5 m lance) and 1,290.4 ml/day (for 1.0 m lance) and needs 50-80% and 37-69% control of PDE respectively.
Control can be achieved by the use of protective garment on the legs and feet only, which received 92-93% of the PDE.
Switching the spray nozzle to the back of the operator reduced the PDE by 98% and was sufficient to make working conditions safe, while maintaining the efficiency of application and making the work lighter and more comfortable.
Mixer/loaders received 86% of the PDE to the hands and the work condition was safe (MOS>I), however impermeable gloves could be used as a further safety measure.
Mots-clés Pascal : Désherbage chimique, Pulvérisation chimique, Sécurité travail, Traitement manuel, Appareil portatif, Mesure sécurité, Pulvérisateur, Zea mays, Gramineae, Monocotyledones, Angiospermae, Spermatophyta, Paraquat, Brésil, Amérique du Sud, Amérique, Etude expérimentale, Evaluation performance, Matériel phytosanitaire, Culture tropicale, Plante céréalière, Ammonium quaternaire composé, Herbicide, Pesticide, Produit agrochimique
Mots-clés Pascal anglais : Chemical weed control, Chemical spray deposition, Work safety, Manual processing, Portable equipment, Safety measure, Sprayer, Zea mays, Gramineae, Monocotyledones, Angiospermae, Spermatophyta, Paraquat, Brazil, South America, America, Experimental study, Performance evaluation, Plant protection equipment, Tropical crop, Cereal crop, Quaternary ammonium compound, Herbicide, Pesticides, Agricultural chemical product
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0147347
Code Inist : 002A34H02B. Création : 16/11/1999.