A funnel trap for the detection of hemlock woolly adelgid (Hemiptera: Adelgidae) and a method of extracting crawlers from trap samples.

ABSTRACT: Eastern hemlock, Tsuga canadensis (L.) Carr., in eastern Canada is under threat from the invasive hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae). Early detection is a key feature to the management of A. tsugae because the impacts of this pest accrue quickly due to its bivoltine life cycle, and treatments can take a year or more to become effective. We tested a novel funnel trap design to collect the mobile first instar nymphs (crawlers) as a tool for early detection of adelgid infestations prior to host symptoms. The funnel traps performed better at detecting A. tsugae crawlers at very low abundance in a stand compared to vertically oriented sticky traps or to canopy branch tip sampling. Satisfactory detection rates for operational surveys were achieved using one or t

SUBMITTER: Fidgen JG 

PROVIDER: S-EPMC12534088 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature