- Insecticide to control flies in livestock spaces and enclosures (pig farms, granaries, stables, dairy facilities, etc.) Contains natural attractant to irresistibly attract flies. Water-soluble powder to apply painted. Its action is very fast, in a few hours. Long-lasting action. It acts by ingestion and contact. Apply the product by mixing 100 grams of product with 80 ml of water, forming a paste with a consistency similar to a thick paint. Masterfly Bait is applied in doses of 100 grams of products for an area of 100m2. It is very important to concentrate the application in certain areas. Identify the areas where flies prefer to land and apply the solution to those specific areas. Paint plastic or wood sheets of approximately 30cm x 30cm with a brush or roller, and hang them in places where flies concentrate (around windows, corners, sunny surfaces...) Anti flies.