To effectively eliminate black rats, you can employ several strategies. Start by eliminating their food sources, such as storing food properly in sealed containers and using secure bins for garbage disposal. Seal any entry points in your home or building to prevent their access. Consider setting up traps or using rodenticides specifically designed for rats. It is also beneficial to maintain good sanitation practices and keep your surroundings clean. Seeking assistance from professional pest control services can provide effective and tailored solutions.