RT Journal Article
T1 Demography of an invading forest insect reunited with hosts and parasitoids from its native range
A1 Krivak-Tetley, Flora E.
A1 Sullivan-Stack, Jenna
A1 Garnas, Jeff R.
A1 Zylstra, Kelley E.
A1 Höger, Lars-Olaf
A1 Lombardero Díaz, María Josefa
A1 Liebhold, Andrew M.
A1 Ayres, Matthew P.
K1 Forest pest
K1 Invasive species
K1 Population ecology
K1 Sirex noctilio,
K1 Oodwasp
AB The Sirex woodwasp Sirex noctilio Fabricius (Hymenoptera: Siricidae), a widespread invasive pest of pines in the Southern Hemisphere, was first detected in North America in 2004. This study assessed the impacts of life history traits, host resistance and species interactions on the demography of S. noctilio in New York, Pennsylvania and Vermont, then compared key metrics to those found in the native range in Galicia, Spain. Many trees naturally attacked by S. noctilio in North America produced no adult woodwasps, with 5 of 38 infested trees (13%) sampled across six sites yielding 64% of emerging insects. Reproductive success was highest in the introduced host scots pine, Pinus sylvestris, but native red pine, Pinus resinosa, produced larger insects. Sirex noctilio required one or sometimes two years to develop and sex ratios were male biased, 1:2.98 ♀:♂. Body size and fecundity were highly variable, but generally lower than observed in non-native populations in the Southern Hemisphere. Hymenopteran parasitoids killed approximately 20% of S. noctilio larvae and 63% of emerging adults were colonized by the parasitic nematode Deladenus siricidicola, although no nematodes entered eggs. Demographic models suggested that S. noctilio in the northeastern USA have a higher potential for population growth than populations in the native range: estimated finite factor of increase, λ, was 4.17–4.52 (depending on tree species colonized), compared to λ = 1.57 in Spain
PB Pensoft
SN 1314-2488
YR 2022
FD 2022-03-25
LK https://hdl.handle.net/10347/44534
UL https://hdl.handle.net/10347/44534
LA eng
NO Krivak-Tetley FE, Sullivan-Stack J, Garnas JR, Zylstra KE, Höger L-O, Lombardero MJ, Liebhold AM, Ayres MP (2022) Demography of an invading forest insect reunited with hosts and parasitoids from its native range. NeoBiota 72: 81–107. https://doi.org/10.3897/neobiota.72.75392
NO USDA Forest Service International Programs for funding the project: International Comparison of Sirex. AML acknowledges funding from grant EVA4.0, No. CZ.02.1.01/0.0/0.0/16_019/0000803 from OP RDE
DS Minerva
RD 6 jun 2026