Since 2025, I have served as leader of the IR-4 Pesticide Registration Field Research program at Oregon State University. The program is based at the North Willamette Research and Extension Center (NWREC) in Aurora, Oregon, and runs all the field trials necessary for registering new pesticides in specialty crops. In recent years, this program has […]
Growing Knowledge archive
Note: This article is part of the Growing Knowledge series in Digger magazine. This series is provided by Oregon State University in collaboration with the United States Department of Agriculture and in partnership with the Oregon Association of Nurseries.
What Farwest and IPPS reminded me about how horticulture moves forward
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Students who once came through our programs are showing up again, this time as members of the industry.
What nearly two decades of intelligent sprayer research has taught us.
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One of my earliest field experiments after arriving at Oregon State University found me walking nursery rows with two people who knew far more about pest management than I did: nursery IPM specialist Robin Rosetta and plant pathologist Jay Pscheidt. We were setting out small pieces of yellow water-sensitive paper — tucking them deep inside […]
Researchers explore how to best help trees through days of high heat
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Dalyn McCauley and Clint Taylor By the middle of a hot summer afternoon, most of us make the same decision. We look for someplace cool. It might be the shade of a porch, beneath the canopy of a favorite tree, or the comfort of an air-conditioned office. At a nursery, crews naturally shift the day’s […]
Box tree moths pose a threat to Oregon nurseries
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While box tree moth has not been detected in Oregon, this pest is of great concern since Oregon is the top producer of boxwoods in the country, followed by California and Ohio.
Managing Phytophthora: timing, temperature and emerging threats
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Phytophthora root rot is a persistent and economically significant issue in the ornamental nursery industry.
Managing slugs and snails in Pacific Northwest nurseries
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and Robin RosettaThe collective scientific name for slugs and snails, Gastropoda, goes a long way towards explaining the headaches that these invertebrates cause nurseries owners throughout the Pacific Northwest. Literally meaning ‘stomach foot’ from the Greek words ‘gastér’ and ‘podòs’, gastropods feed on a large number of ornamental plants. They are also thought to transmit […]
Managing powdery mildew with biological fungicides
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Interest in natural treatment methods is being driven by concerns over resistance
and the desire for reduced-risk pest management.
OSU’s study of native plants gives insights into preferences of gardeners and pollinators
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and Gail Langellotto Native plants have greatly increased in popularity among gardeners over the past several years, in part due to these plants’ purported value to bees and other pollinators. However, many native plants are difficult to grow and finish at scale in modern nursery production systems. Also, some native plants are viewed as too […]
Oregon nurseries light the way for houseplants
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Winter production in Oregon has a familiar dark side: month after month where sunshine is in short supply.
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