1988
DOI: 10.5558/tfc64345-4
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Armillaria Root Rot Damage in Softwood Plantations in Ontario

Abstract: Armillaria root rot. caused most likely by Armillaria obscura (Pers) Herink, killed 6-to 21-year-old white spruce, black spruce, jack pine and red pine saplings in each of 49 plantations examined in northern Ontario. Annual mortality in the four species over the last 2 to 6 years averaged 1.4%, 1.5%, 0.5% and 0.2%, respectively. In all but one of 25 white spruce and red pine plantations (43 to 58 years old) in eastern and southern Ontario. Armillaria root rot was associated with mortality. Accumulated mortalit… Show more

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Cited by 20 publications
(13 citation statements)
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“…These findings highlight the importance of episodic as well as density-related mortality in forecasting yields. Root rots, windfall and snow damage can cause substantial mortality in black spruce plantations (Whitney 1988(Whitney , 1993Bruhn et al 1996).…”
Section: Discussionmentioning
confidence: 99%
“…These findings highlight the importance of episodic as well as density-related mortality in forecasting yields. Root rots, windfall and snow damage can cause substantial mortality in black spruce plantations (Whitney 1988(Whitney , 1993Bruhn et al 1996).…”
Section: Discussionmentioning
confidence: 99%
“…In surveys of Arrnillaria root disease in Ontario softwood plantations, Whitney (1988) and ~c~a u g h l i n~ (unpubl. man.)…”
Section: Introductionmentioning
confidence: 99%
“…Earlier studies (Whitney 1988;McLaughlin 2001a, b) reported its association with red pine mortality. Since most of the red pine plantations were established on former agricultural land the origin of inoculum at the various sites is of interest.…”
Section: Armillaria Root Diseasementioning
confidence: 99%
“…Candidate sites were visited prior to selection and putative causal factors were identified whenever possible. Final site selection was based on maximizing geographic and putative causal variation, with a focus on sites with root disease, which are common in southern Ontario (Whitney 1988;McLaughlin 2001a, b). The field studies were conducted in 2004.…”
Section: Selecting Study Sitesmentioning
confidence: 99%
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