What is a limitation of local treatments for Drywood termite infestations?

The correct answer highlights a significant challenge faced when dealing with Drywood termite infestations using local treatments. Localized treatment methods often target visible infestations, but Drywood termites create colonies within wood, often out of sight. This makes it difficult to identify and access every infested area. Since these termites can be present in multiple locations within a structure and may conceal their activity, treatment might not effectively eradicate the entire infestation. If certain colonies remain untreated due to being hidden, these can continue to thrive and create new swarms, leading to future infestations.

In this context, while options related to cost, time, and effectiveness on large colonies may have relevance in specific situations, the core limitation of local treatments is the challenge of locating and treating every affected area. This difficulty is crucial in managing and preventing further termite damage effectively.