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August 2018 - present
January 2014 - May 2018
Publications
Publications (10)
Norway spruce (Picea abies) is a widely used Christmas tree species in the Nordic countries. Postharvest needle retention is an important characteristic for Christmas trees and compared to many fir (Abies) species, Norway spruce has poor postharvest needle retention. This trait is one of the most important qualities in choice of natural versus plas...
In integrated pest management (IPM), the goal is to keep the impact of damaging agents below a threshold level with reduced pesticide use. The present review is focusing on IPM of fungal diseases and Phytophthora root rot in Norwegian Christmas tree plantations. Healthy transplants are of vital importance to give the production a good establishment...
Seedling blight caused by Sirococcus conigenus was recently reported on Norway spruce ( Picea abies ) from Norwegian forest nurseries. The inoculum source was found to be infected seeds. In a Petri dish assay, the fungicide fludioxonil + difenoconazole was, among other fungicides, found to inhibit mycelial growth of S. conigenus . This fungicide is...
Phytophthora cryptogea, P. gonapodyides, P. lacustris, P. megasperma, P. plurivora, P. taxon paludosa and an unknown Phytophthora species were isolated from waterways and soil samples in Christmas tree fields in southern Sweden. In addition, P. megasperma was isolated from a diseased Norway spruce (Picea abies) plant from one of the fields in Svalö...
Deployment of genetically resistant Eastern white pine (Pinus strobus L.) planting stock could reduce economic losses to root rot caused by Phytophthora cinnamomi Rands in Christmas tree and forest plantations. This study aimed to determine the degree of genetic control of resistance to P. cinnamomi in Eastern white pine and secondarily, to compare...
The fungus Neonectria fuckeliana has become an increasing problem on Norway spruce (Picea abies) in the Nordic countries during recent years. Canker wounds caused by the pathogen reduce timber quality and top-dieback is a problem for the Christmas tree industry. In this study, four inoculation trials were conducted to examine the ability of N. fuck...
The Southern Appalachian Mountains are home to the attractive Fraser fir [Abies fraseri (Pursch) Poir.] that began to be cultivated for Christmas trees in the 1950s. Today, 5 to 6 million trees are harvested annually in this region, yielding a wholesale value of more than $100 million. Since the 1960s, however, Phytophthora root rot has been a prob...
Phytophthora root rot (PRR) disease afflicts significant economic losses to the Fraser fir Christmas tree industry. In previous surveys conducted in 1972 and from 1997 to 1998 in North Carolina, the incidence of PRR was ∼9.5% with P. cinnamomi identified as the predominant causal species isolated from infected roots of Fraser fir. Due to increased...
In May 2015, a Christmas tree disease and pest survey was carried out in southern Sweden. Neonectria canker found on spruce and fir was the most prominent disease problem.
Accepted for publication 1 September 2016.
