Whether or not it’s the japanese (Vespula maculifrons), southern (V. squamosa), or different species, why do yellowjackets appear so aggressive? The reply is straightforward: Yellowjackets are territorial, and after they really feel their nest is threated, they may assault. Yellowjackets and their cousins, the bald-faced hornets (Dolichovespula maculate), secrete an alarm pheromone each time threatened or disturbed. That’s why swatting and killing that pesky yellowjacket that’s circling your drink solely appears to attract extra to the social gathering. And as we transfer via the season and their meals sources dry up in late summer season, the issue solely will get worse.
At these accounts, chances are you’ll must go on slightly looking mission to find the yellowjacket nest(s). They often will likely be discovered underground, though typically they are often situated nesting within the partitions of a house. An early-morning or early-evening therapy is the prescription.
My favourite methodology all the time has been insecticidal mud utilized with an extension puffer bulb. If attainable, place a window display screen over the nest entry gap earlier than making use of any therapy, to forestall yellowjackets from escaping and to guard your self and others from a vicious assault.