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Wood Injection: Tips and Techniques for Treatment of Wood Destroying Insects.

When wood destroying insects are discovered infesting a structure, a fast and simple treatment approach may be a good solution to stop the damage caused by their feeding or tunneling activity. Ready-to-use (RTU) insecticide products applied within the microhabitats of the wood destroying insect(s), such as in galleries or tunnels, or directly onto the insect while in the infested wood, provide an immediate control response.

Not all RTUs are the same; therefore, it is important to understand the features or characteristics of the product to be used. For instance, Prescription Treatment® brand FastOut™ CS Foam is the first pressurized foam to contain a microencapsulated insecticide (in this case cyfluthrin). It comes equipped with an applicator tip and dispensing tube permanently attached o the actuator. The foam expands as it is applied, spreading the non-repellant microcapsules deep into the galleries where they are needed to control a wide range of wood destroying pests.

Prescription Treatment brand ProCitra-DL™ and Cy-Kick® Crack & Crevice® Pressurized Residual are pressurized liquid products that flow into galleries and then penetrate the wood via capillary action to provide great protection. Both products may be injected into wood using the System III® applicator with its brass injection tip. ProCitra-DL features the active ingredient d-limonene, an oil extracted from citrus peels. It’s a great choice where a naturally derived active ingredient is desired. Cy-Kick features the active ingredient cyfluthrin and is an excellent choice when a longer lasting residual is required.

In infested areas where the insect(s) have provided injectable openings into the wood, such as the openings created by carpenter ants, drywood termites or the damaged wood surface(s) resulting from subterranean termite feeding, the applicator tip of either the foam or the System III can be inserted into the opening and the product applied. Although injecting insecticide in these damaged areas is relatively simple, it can be difficult to get a tight seal around the applicator tip if the surface is greatly damaged, thus allowing the product to dribble out onto the surface of the area being treated. Holding a paper towel around the injection site can help stop this from happening. When creating a seal around the applicator tip is not possible, a simple solution may be just to move to another access hole nearby to make the application. Inject the insecticide into several openings to ensure thorough coverage of the infested material.

One advantage to using a foam product in these situations is that the foam will generally flow better than a liquid spray in infested materials and require fewer injection sites to get the same coverage. When using FastOut CS, remember to shake the can well prior to use and then wait at least 8 seconds after the application before removing the applicator tip from the access hole. If the infested wood material does not have adequate openings through which an insecticide product can be applied, one or more holes will have to be created. Drill holes into the wood that are approximately 1/8 inch in diameter, and deep enough to reach the tun-nels and/or galleries. Be careful not to drill too deeply, piercing the back-side of the wood. As a rule of thumb, always leave at least

Above: Injecting insecticide products into wood using the System III applicator is achieved by using a brass tip designed for wood injection inserted over the valve stem located at the discharge end of the gun body. 1/2 inch undrilled. It is a common practice to drill a series of holes about 5 to 10 inches apart along the grain and in a zig-zag formation across the grain to be sure coverage is complete.

When performing wood injection treatments, the applicator should consider wearing hand and eye protection. Before any application begins, read and follow label directions and safety precautions.

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