A soilborne plant pathogen not previously seen in the United States — Phytophthora austrocedri — has been detected at two Oregon nurseries and has infested an unknown number of plants. The detections have prompted an aggressive quarantine of some of the plant material on both operations as growers and authorities strive to identify infested areas and contain the pathogen’s […]
Highlights from the 2024 Oregon Nursery Science Summit
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— PostedParticipants get update on research, insect and pest management and plant selection and production
Program equips growers with knowledge to prevent and diagnose nursery crop diseases
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— PostedOur mission is to provide nurseries and their teams with the information and resources they need to protect and improve plant health.
Progress towards effective Phytophthora root rot control
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— PostedOSU research shows different approaches required for management of common rhododendron disease.
Researchers roundup
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— PostedGet to know the horticultural researchers at OSU and USDA Many programs focus on nursery, greenhouse, landscape and related crops at Oregon State University (OSU) and the Horticulture Crops Research Laboratory at the Agricultural Research Service (USDA ARS), the principal in-house research agency of the United States Department of Agriculture. Here are some of the […]
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 […]
Knowing your cedar pests
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— PostedGrower awareness of problems can protect both grower and customer It’s important to be aware of issues in the landscape and forest, as they can become problems in the nursery or for your customers. Cedar trees have a number of pest and problems to be aware of, from abiotic disorders to insects and diseases. Some […]
Managing epidemics
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— PostedWhether dealing with plant pathogens or COVID-19, common principles apply The COVID-19 pandemic has changed life as we know it, threatening human health, causing disruption to our society, and resulting in economic challenges. While impacts of plant pests and diseases may pale in importance compared to COVID-19, they still cause large-scale ecological and economic damage […]
Scouting for boxwood blight
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— PostedThese tips make it easier to spot and mitigate this highly infectious disease By Jerry E. Weiland and Jay W. Pscheidt The 2019 growing season was a big year for boxwood blight in Oregon. The disease, caused by the pathogen Calonectria (Cylindrocladium) pseudonaviculata, has caused substantial damage to boxwood shrubs in U.S. nurseries and gardens […]
Sticking together on big pest issues
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— PostedNursery and greenhouse operators face an ever-increasing set of opportunities and challenges. Few are more daunting, or more of a game changer, than pest and disease issues. Oregon has a stellar reputation of producing quality plant material, which is shipped throughout the Pacific Northwest, the nation and internationally. Faced with uncertainty regarding the spread of […]
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