Dust Control in Pig Houses by Spraying Rapeseed Oil

Airborne dust concentrations in pig houses were reduced by spraying with a mixture of water and rapeseed oil (1 to 4 treatments d1). The daily doses of oil (5 to 64 mL pig1 d1) were varied as the oil concentrations (5 to 20%) and the duration of the spraying time (5 to 90 s d1) were changed. The treatment did not cause an increase of the average concentration of vegetable oil in the air. No pathological lung change in the pigs related to the treatment with rapeseed oil was found, and no indication of oil resorption to lung tissues, lymph nodes, or upper respiratory systems in the pigs was seen.