Imidacloprid. For The Control Of Nuisance Flies In And Around Livestock Facilities And Stables. Paint-on Application: Mix 1.5 oz bait with 1 fl oz warm water (3 lbs bait in 1 quart water) and stir thoroughly. Let stand for about 15 minutes until a paste consistency suitable for painting has formed. Apply the paste with a brush to surfaces where flies rest, avoiding surfaces that are dusty.