Experimental and Applied Testing of Yellowjacket Trapping Efficacy in Upstate New York; Summary of Work to Date
By far, the largest majority of the stinging insects caught in the traps were Vespula yellowjackets, and only this data has been analyzed. Other plentiful species included the bald-faced hornet (Dolichovespula maculata), paper wasps (especially Polistes dominulus), and the European hornet (Vespa crabro). In addition, a potpourii of other stinging insects were also caught in small numbers.
In all three years, captures of yellowjackets started slow, peaked in September, and dropped off rapidly in October. Although never significantly different (Stuent’s T-test, P<0.5), more yellowjackets were caught in the center traps in plots without peripheral traps than in the center traps in plots with peripheral traps (Figure 3).
This may indicate a trend for the peripheral trapping to reduce the number of yellowjackets inside the plots. In the first and third years of the study, number of yellowjackets trapped declined once the peripheral traps were switched and gradually built up as each two-week trial progressed. Possibly yellowjackets were homing in on the plot with the most traps and took awhile to change their behavior once the peripheral traps were moved. If so, this would indicate that the traps are attracting, and not just merely intercepting, yellowjackets.