They may not be as effective as boric acid because they are repellent to the cockroach. However, they can keep the pests out of certain areas, such as wall voids and attics. While boric acid is poisonous, silica aerogel and diatomaceous earth act by rubbing off the protective waxes that cover the cockroach's body and cause death by dehydration. Baits can be applied to areas that cannot be sprayed or dusted. They consist of an attractant, such as peanut butter or syrup, and a nonrepellent insecticide, such as boric acid.
Baits are long lasting and are most effective when placed in small amounts in many locations.
Most baits are available in child- and petproof containers. Baits are much more effective if they are the only food source available. Good sanitation is especially important for this type of control. If the situation is severe or it is unclear what to do, professional pest control services are available. These companies employ trained pest control operators and have access to insecticides and equipment that are not available to private individuals.