Journal
BULLETIN OF ENTOMOLOGICAL RESEARCH
Volume 106, Issue 4, Pages 546-550Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007485316000250
Keywords
hemlock woolly adelgid; silver flies; biological control
Categories
Funding
- USDA Forest Service, Forest Health Technology Enterprise Team (FHTET), Morgantown, WV
- Oregon State University College of Forestry
- Oregon Sports Lottery Scholarship Fund
Ask authors/readers for more resources
Adelges tsugae infested western hemlock trees were sampled periodically for 1 year at two locations in Oregon and Washington to compare the phenology and abundance of three associated predators (Leucopis argenticollis, Leucopis piniperda, and Laricobius nigrinus) and their host. On each sample date, two 3-10 cm long terminal twigs were collected from each tree and brought to the laboratory to count all life stages of A. tsugae and the three predators. Peak larval abundance of Leucopis spp. and La. nigrinus coincided with the presence of A. tsugae adults and eggs. Leucopis spp. larvae were present for a much longer period of time than were La. nigrinus larvae. Furthermore, Leucopis spp. larvae were present during both the progrediens and sistens egg stages, while La. nigrinus larvae were only present during the progrediens egg stage. Overall, we collected 2.3-3.5 times more Leucopis spp. of all life stages than La. nigrinus. These results support the continued study of Leucopis spp. from the Pacific Northwest as biological control agents for A. tsugae in the Eastern USA.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available