Growers take an interest in steering landscapers and end users to the right tree for the location No tree can grow best in the wrong place, and no location can be enhanced by the wrong tree. To that end, the flow of information between tree growers, and experts in the markets they serve, is critical […]
A new day for crabapples
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— PostedThis flowering tree is on the upswing, thanks to disease resistance and all-season beauty Crabapples have enjoyed a bumpy history. Originating in the mountains of Kazakhstan, crabapples’ spring flowers landed in Chinese palace gardens and were carried along the Silk Road to Europe. Beyond their beauty, crabapples can act as a blanket pollinator for an […]
Villains of the greenhouse II
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— PostedWhen seedlings fail, Fusarium damping-off or wilt could be another cause Part two of a series. Part one of Villains of the greenhouse, published in the April 2021 issue of Digger, covered Rhizoconia damping-off, root rot and stem rot. It can be viewed at www.diggermagazine.com/villains-of-the-greenhouse. There are many fungi that live and survive in the […]
Knowing your cedar pests (Part 2)
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— PostedPart 2: Thuja, Juniperus and Cupressus It’s important to be aware of issues in the landscape and forest, as these can become problems in the nursery or for your customers. On the flip side, problems not detected in the nursery can become big issues when planted out at the customer’s end. Cedar trees have a […]
Know thy enemy
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— PostedExpert insect pest identification resources are available in Oregon The foundations of a good integrated pest management (IPM) plan are scouting, monitoring and identification — knowing where and when you have pests, and knowing exactly who those pests are. Scouting and monitoring techniques are straightforward. One can use tools like sticky cards, traps, bait plants, […]
Restoring a conifer classic
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— PostedBreeding disease-resistant Port Orford cedar for reforestation and the horticulture industry By Ryan Contreras and Richard Sniezko Port Orford cedar (Chamaecyparis lawsoniana) is a long-lived conifer native to northwestern California and southwestern Oregon. It spans an elevational range from sea level to 5,000 feet or more. In forestry, the tree has both economic and ecological […]
Call it ‘herbal distancing’
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— PostedResearch shows that spacing out boxwood shrubs in production prevents the spread of infectious spores By Mana Ohkura, Lloyd Nackley, Carolyn Scagel and Jerry E. Weiland It’s been a year and a half since the COVID-19 pandemic started. We have been hearing how social distancing prevents the spread of the virus and we see signs […]
A tree with a peel
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— PostedDespite some pest issues, birch trees provide a distinctive, well-loved look Sales of popular birch trees in Oregon plummeted in the early 2000s when the bronze birch borer made its way across the country and began attacking susceptible plants up and down the Willamette Valley. The voracious insect had been plaguing states in the Midwest […]
Lessons from an ice storm
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— PostedWidespread tree destruction highlights the importance of proper selection and maintenance The northern Willamette Valley in Oregon was hit by a once-in-a-generation ice storm on February 12 and 13 of this year. In the small town of Silverton, where the valley meets the Cascade Range foothills, freezing rain fell for more than 30 hours. Trees […]
The grassroots of research
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— PostedThe nursery industry plays an important role funding and vetting beneficial research projects Universities and colleges, in Oregon and elsewhere, don’t merely provide nurseries and greenhouses with well-trained, knowledgeable and conversant employees. They also provide research-proven knowledge and best practices, so growers can produce a better crop and run a more profitable business. These institutions […]
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