What is a preventative measure against wood wasps?

Kiln drying infested lumber is an effective preventative measure against wood wasps because these pests lay their eggs in moist wood where their larvae can thrive. By subjecting lumber to kiln drying, the moisture content is significantly reduced, making it an inhospitable environment for wood wasp larvae. This heat treatment not only eliminates existing pests but also helps prevent future infestations by ensuring that the wood remains dry and unsuitable for egg-laying.

In contrast, regular painting of wood might provide a protective layer that resists moisture but does not eliminate existing insect infestations or address the underlying issue of moisture. Applying natural oils could offer some level of protection or deterrent effect against certain pests but may not be as comprehensive or effective as kiln drying in addressing the specific needs and lifecycle of wood wasps. Installing screens is primarily a method for preventing entry of flying insects into structures and does not directly affect wood that may already be infested.

Understanding the biology of wood wasps and their preference for moist wood reinforces why kiln drying is a key method in preventing their infestation.