Cockroaches & Boric Acid

Cockroaches are not only repulsive to most people, but they carry disease.

While many people are frightened by insects in general, the cockroach often elicits the most disgust. Unfortunately, the cockroach is also one of the most common household pests. Besides evoking revulsion by their mere presence, these insects can also transmit disease and cause allergies. Hence, it's important to attack a cockroach infestation aggressively. Boric acid can help you get rid of cockroaches in the home easily and effectively.

Definition

Boric acid is an odorless white powder made from boron and water. Boron is a mineral found in many consumer products, including mouthwash and laundry detergent. While boric acid is deadly to roaches, the toxicity level of the substance is too low to cause humans and pets any harm, according to Mike Potter, an extension entomologist at the University of Kentucky's College of Agriculture.

Effectiveness

One of the oldest substances used to fight cockroach infestations is also one of the most effective, if used properly, according to Potter. Boric acid is also effective even in tiny amounts, and it remains effective for as long as the deposit stays dry.

Function

Boric acid is not a repellent, but rather a poison for cockroaches. It has no repellent properties, like many other insecticides. This means that cockroaches keep returning to the area treated with boric acid until they die. The boric acid particles work by sticking to the roaches' bodies and getting absorbed through the insect's outer shell. The roaches also ingest the particles that have become stuck to their exteriors during preening.

Availability

Boric acid comes ready to use and can be purchased at many hardware and grocery stores. Potter recommends buying boric acid in squeeze-bottles with thin applicator tips, because they make application easy.

Application

Apply a very thin layer of boric acid to areas where cockroaches are likely to live or frequent, such as cracks and crevices close to food. They are also attracted to moist, warm areas. They often like kitchens and bathrooms, and other areas where plumbing pipes stick out of walls. The layer of powder should be barely visible, since roaches may avoid piles of the powder. Don't apply the substance to countertops or other exposed surfaces, especially if those surfaces are used for food preparation. Boric acid can be used alone or as part of a larger roach control plan that includes roach baits.

References

• University of Kentucky College of Agriculture: Cockroach Elimination
• Colorado State University Extension: Cockroaches