6 Best Insecticides For Carpenter Bees 2025 in the United States

Delta Dust Multi Use Pest Control Insecticide Dust, 1 LB, is a versatile insecticide that prominently features deltamethrin as its active ingredient at a concentration of 0.05%. This product effectively targets a wide range of pests including carpenter bees, making it a suitable choice for users dealing with multiple insect issues. Its powder formulation allows for easy application in various environments and hard-to-reach areas, which is crucial for controlling carpenter bees that often nest in wood structures.

The residual effect is favorable, providing extended protection and minimizing the need for frequent reapplications. However, as it is a chemical insecticide, safety precautions must be observed, and it should be kept away from children and pets. Users have rated it 4.4 out of 5 stars, indicating general satisfaction with its performance.

The product covers up to 2,000 square feet, making it economical for large areas. One limitation is that it cannot be shipped to New York or Connecticut, which may be a drawback for users in these locations. Despite this, Delta Dust remains an effective and user-friendly option for managing carpenter bees and other pests.

The Spectracide Terminate Termite & Carpenter Ant Killer is designed for those dealing with wood-destroying insects like carpenter bees, termites, and carpenter ants. It features Lambda-Cyhalothrin as the active ingredient, known for its effectiveness in quickly eliminating these pests. The product's ready-to-use (RTU) spray formulation makes it convenient for immediate application without the need for mixing, which is a significant benefit for users looking for straightforward pest control solutions.

The non-staining clear formula is an added advantage, as it leaves no residue or odor, making it suitable for both indoor and outdoor use without causing damage to surfaces or creating unpleasant smells. This versatility is complemented by a 9-month residual effect indoors, providing long-lasting protection against insects. The AccuShot sprayer enhances ease of use, allowing for precise and continuous spraying, which can be particularly helpful for targeting specific areas where carpenter bees and other insects are active.

However, the product’s weight (12.26 pounds) and size might make it somewhat cumbersome to handle, especially for those who need to cover large areas. Safety-wise, being an EPA-approved product offers a level of assurance, but it is still necessary to follow proper handling instructions to avoid potential health risks. This insecticide is a solid choice for homeowners looking to control carpenter bees and other wood-destroying insects, but it may not be the most convenient option for extensive treatment areas due to its weight and handling.

Bayer Tempo 1% Dust is a powder insecticide designed to control a variety of pests, including carpenter bees, in places like walls, crawl spaces, and other hidden areas where these insects often nest. Its active ingredient is a potent chemical that offers a lasting residual effect, meaning it continues to work for some time after application, which helps prevent re-infestation. The dust formulation makes it easy to apply directly into cracks and holes where carpenter bees hide, reaching spots that sprays might miss.

This product is highly rated by users for effectiveness and is suitable for use in various buildings, including homes and warehouses, making it quite versatile. However, it cannot be shipped to certain states like California, Connecticut, or New York due to local regulations. Safety-wise, as with many insecticides, it should be handled with care, using protective gear and keeping it away from food areas despite being approved for non-food zones.

Some users may find dust products messier compared to sprays, and improper application might reduce its effectiveness. For those specifically looking for a product to target carpenter bees in hidden places that offers a reliable residual effect, Bayer Tempo 1% Dust is a strong option, provided safety instructions are followed and local shipping restrictions are considered.