Which type of wasp nest typically requires follow-up treatment?

Yellow jackets are known for building their nests in hidden locations and can be aggressive when disturbed. They often create nests that can host large populations, especially as the summer progresses. Follow-up treatment becomes necessary because even after an initial treatment, it's common for remaining yellow jackets or their larvae to still be present in the nest. If the nest is not thoroughly eradicated, it can continue to be a source of problem, as new worker wasps emerge which can lead to further infestation.

In contrast, paper wasps and hornets typically have nests that are less densely populated compared to yellow jackets and might not require follow-up treatment. Sand wasps usually nest in the ground and are less of a nuisance compared to the others. Therefore, when dealing with yellow jackets, follow-up treatment is vital to ensure complete control and prevent the re-establishment of the nest. This understanding is particularly important for effective pest management and safety.