2012
DOI: 10.1603/en11275
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Natural Enemies Associated With <I>Sirex noctilio</I> (Hymenoptera: Siricidae) and <I>S. nigricornis</I> in Ontario, Canada

Abstract: Sirex noctilio F. is an exotic woodwasp now found in eastern North America where it shares natural enemies with native woodwasps of Pinus spp. To study the extent to which native hymenopteran parasitoids and parasitic nematodes could affect woodwasp populations, 60 Pinus trees with symptoms of S. noctilio attack were felled in 2007 and 2008 in Ontario, Canada. Each tree bole was cut into 1-m sections that were placed in individual rearing tubes; emergence was monitored from May to November of the year of fell… Show more

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Cited by 36 publications
(78 citation statements)
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“…In northeastern North America S. noctilio is now the most abundant woodwasp attacking pines (Long et al 2009;Ryan et al 2012a;Foelker et al 2016). Unfortunately, there are no records of the population densities or tree use by S. nigricornis before S. noctilio arrived but now, use of suppressed pines by S. nigricornis is much less than use of this resource by S. noctilio (e.g., Table 2).…”
Section: Comparing Abundance Of Sirex Speciesmentioning
confidence: 99%
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“…In northeastern North America S. noctilio is now the most abundant woodwasp attacking pines (Long et al 2009;Ryan et al 2012a;Foelker et al 2016). Unfortunately, there are no records of the population densities or tree use by S. nigricornis before S. noctilio arrived but now, use of suppressed pines by S. nigricornis is much less than use of this resource by S. noctilio (e.g., Table 2).…”
Section: Comparing Abundance Of Sirex Speciesmentioning
confidence: 99%
“…Sirex noctilio has a temporal advantage over S. nigricornis as many emerge 1-2 months before S. nigricornis, although there is overlap in emergence between these species in northeastern North America (Ryan et al 2012a;Haavik et al 2013;Hartshorn et al 2016;Suppl. material 1: B).…”
Section: Comparing Abundance Of Sirex Speciesmentioning
confidence: 99%
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“…This also plays an important role in populations in natural woody ecosystems (4,27,37,66,90,106,128).…”
Section: Natural Enemiesmentioning
confidence: 99%