Abstract: A dust bag for applying powder insecticide to animals includes an outer mesh bag, an inner mesh bag, a waterproof lining between the two bags, and a double bag cartridge for containing the insecticide. The inner bag is placed inside of the outer bag with a dust chamber presented between the bottom ends of the bags to receive powder passing through the inner bag. The inner bag is characterized by a closer mesh weave than the outer bag, and the two woven bags cooperate with the waterproof lining to prevent rainwater from contaminating the powder while metering the flow of the insecticide to the animals. The cartridge is supported on the bottom of the inner bag and comprises a double bag arrangement with offset holes in the two bags for preventing water entry. The invention also contemplates a novel closure structure for a bag wherein a U-shaped hanger is coupled with a flap which closes an opening in the bag.

Abstract: A dust bag for applying powder insecticide to animals includes an outer mesh bag, an inner mesh bag, a waterproof lining between the two bags, and a double bag cartridge for containing the insecticide. The inner bag is placed inside of the outer bag with a dust chamber presented between the bottom ends of the bags to receive powder passing through the inner bag. The inner bag is characterized by a closer mesh weave than the outer bag, and the two woven bags cooperate with the waterproof lining to prevent rainwater from contaminating the powder while metering the flow of the insecticide to the animals. The cartridge is supported on the bottom of the inner bag and comprises a double bag arrangement with offset holes in the two bags for preventing water entry. The invention also contemplates a novel closure structure for a bag wherein a U-shaped hanger is coupled with a flap which closes an opening in the bag.