Phytophthora species associated with red alder dieback in British Columbia, Canada

Author(s):  
Nicolas Feau ◽  
Mark Mcdonald ◽  
Berni Van Der Meer ◽  
Yishang Zang ◽  
Padmini Herath ◽  
...  
1965 ◽  
Vol 43 (11) ◽  
pp. 1471-1475 ◽  
Author(s):  
R. G. Atkinson

In the south coastal region of British Columbia about two-thirds of the Phytophthora isolates from Chamaecyparis lawsoniana affected with root rot were P. lateralis, and the remaining third comprised P. cinnamomi and an unidentified Phytophthora sp. P. cinnamomi was isolated infrequently from Taxus baccata L., T. cuspidata Sieb. & Zucc., and Rhododendron ponticum L. New host records of P. cinnamomi, in experimental infections, are Chamaecyparis pisifera Sieb. & Zucc. var. filifera nana aurea and Cornus nuttallii Aud. The unidentified Phytophthora sp. experimentally infected C. lawsoniana var. ellwoodii, C. pisifera var. filifera nana aurea, R. ponticum, R. obtusum Planch var. Hinodegiri, and C. nuttallii.


1981 ◽  
Vol 113 (12) ◽  
pp. 1055-1060 ◽  
Author(s):  
Anne T. Howden ◽  
Henry F. Howden

AbstractAdults and larvae of Rhinosimus viridiaeneus Randall observed on Vancouver Island, British Columbia, prefer the inner bark of dead branches of red alder (Alnus rubra Bong.) for food. When feeding, the flattened elongated rostrum of the adult is inserted between the papery outer bark and the cambium. The rostrum is also used to prod or flip intruding Rhinosimus away from a feeding site. The larva is described for the first time.


2010 ◽  
Vol 142 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Leland M. Humble

AbstractThe discovery in southwestern British Columbia of widespread established populations of the Palaearctic leafminer Heterarthrus vagans (Fallén) feeding on native red alder, Alnus rubra Bong. (Betulaceae), is reported. A preliminary survey suggests that it is currently confined to the Fraser Valley west of Hope, its distribution extending north along Howe Sound almost to Squamish. It was not found in the greater Victoria area. No other regions of the province have been surveyed. This introduced sawfly completes at least two generations a year. Diagnostic characters to aid the recognition of adults and feeding larvae of H. vagans and a modified key to adult Heterarthrinae on Betulaceae are provided.


2019 ◽  
Vol 434 ◽  
pp. 244-254 ◽  
Author(s):  
Chengdong Fang ◽  
Philip G. Comeau ◽  
George J. Harper

2001 ◽  
Vol 77 (4) ◽  
pp. 705-712 ◽  
Author(s):  
Andreas Hamann

During the last two decades, the value of red alder wood products has substantially increased and several initiatives have been launched in the United States to use red alder for reforestation. Nonetheless, red alder is a largely neglected resource in British Columbia. This review paper examines the reasons behind the under-utilization of red alder in British Columbia and investigates whether changes in red alder management practices could improve the value of the resource. Red alder's potential for plantation forestry and genetic tree improvement are discussed, and possible breeding objectives were evaluated with consideration for the species biology, growth, product value and market demand. Seed transfer rules and the possibility of gains from selection are summarized in the light of new research results in genecology and quantitative genetics for red alder populations in British Columbia. Key words: red alder, Alnus rubra, tree improvement, quantitative genetics, genecology, resource management


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