Testing the efficacy of using ultraviolet spectral lights to protect greenhouse tomatoes By Kristine R. Buckland, Cynthia M. Ocamb, Lloyd Nackley and Ann L. Rasmussen Widespread outbreaks of powdery mildew have been occurring in fresh market tomato crops in western Oregon over the past decade. Disease incidence and severity tend to be greater in tomatoes […]
Vole control
By — Posted
These tiny, burrowing rodents can cause problems for nursery crops As we anxiously wait for the first breeding-season birds to arrive and signal winter’s end, most vole species are also gearing up to produce more young. Voles are small, native rodents that are often called “meadow mice.” Oregon is home to a total of 13 […]
Fire blight in the plant nursery
By — Posted
How did it arrive here, and what can be done? Fire blight is a disease that can kill apple and pear trees. It is especially dangerous in a nursery setting, for reasons we will explain. The disease can result in the direct loss of plant material, which in turn can necessitate a costly and difficult […]
The continuing battle against nasty Nostoc
By — Posted
Additional treatment methods are tested against this nursery nuisance By Heather Stoven and Jennifer Parke Slimy colonies of the cyanobacterium Nostoc are increasingly noticeable in nurseries and sports infields throughout the country. They appear as green-to-brown-colored globby mats, which, in nurseries, grow on multiple surface types within container yards and greenhouses. What is referred to […]
Ornamental hazelnut cultivars from Oregon State University
By — Posted
The hazelnut breeding and genetics program at Oregon State University (OSU) has named and released two disease-resistant, red-leafed ornamental cultivars of European hazelnut, Corylus avellana L. The cultivars bring to the nursery industry new combinations of interesting growth habit, leaf form and color, and resistance to the fungal disease eastern filbert blight (EFB). ‘Red Dragon’, […]
Emerging threats to conifer foliage
By — Posted
Growers and nurseries should be on the lookout for these diseases By Jared LeBoldus, Dave Shaw, and Paul Reeser Two new foliage diseases of Douglas fir and several other conifer species are emerging in Oregon, and they could be a threat to conifer growers and nurseries. The pathogens include Phytophthora pluvialis, the cause of Pytophthora […]
Pest control for Christmas trees
By — Posted
Evaluating new and old insecticides, and beneficial insects, for aphid control By Chal Landgren, Judy Kowalski, David Howell, Paige Kuchy Aphid control on Christmas tree and other conifer plantings can be a yearly headache for growers. This is especially true for growers of grand fir which, for some reason, seems especially “tasty” to aphids. Over […]
Here comes the sun
By — Posted
Researchers continue to evaluate soil solarization as a weed management technique By Carol Mallory-Smith, Jennifer Parke and Nami Wada In 2017, nursery and greenhouse producers added $947.7 million to Oregon’s economy, according to the Oregon Department of Agriculture. And for this very valuable Oregon industry, and all agricultural systems, weeds are a major issue impacting […]
Turf care without herbicides
By — Posted
Research evaluates the use of IPM for weed control on turfgrass By Emily Braithwaite, Brian McDonald, Tim Stock and Alec Kowalewski It is speculated that proper cultural management practices can reduce weed populations in turfgrass without the use of herbicide applications. With new laws restricting access to certain pesticides within turfgrass management and increased pressure […]
The ‘tangled root ball’
By — Posted
Family-owned businesses must balance work, ownership and family roles Each June, family business owners interview with a panel of peers to compete in the Excellence in Family Business Awards. Judges consistently ask each CEO how they carve out time for their family. To date, the most memorable — and perhaps practical — “policy” came from […]