Mich. Comp. Laws § 750.438

Sec. 438. Manufacture, etc., of poisonous fly killers—Any person who shall manufacture, compound, sell or offer for sale, or cause to be manufactured, compounded, sold or offered for sale, any fly paper or other form of fly killer which contains arsenic or other poison in sufficient quantity to be dangerous to the life or health of persons, unless the same, when so manufactured, compounded, sold or offered for sale, shall be so prepared, constructed or guarded that when in use said poisonous paper, substance, compound or solution shall be inaccessible to children or other persons who might eat, drink or swallow the same, or any portion thereof, shall be guilty of a misdemeanor.