Category Archives: IPM

Posts related to Integrated Pest Management

Pest Alert: California root borer in hazelnuts

Posted on June 5, 2023 by Nik Wiman

A few years back we were trying to attract flatheaded borers (Buprestidae) to traps when we realized another borer pest may also be problematic in hazelnuts. Working with a pheromone company (AlphaScents, Canby OR) we deployed some pheromone of the … Continue reading →

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Heat and sulfur burn in hazelnuts

Posted on May 11, 2023 by Nik Wiman

A few years ago, the Oregon hazelnut industry added a new tool to use against big bud mite: micronated dry flowable sulfur. There are several special local needs labels for different brands that you can find in the Hazelnut Pest … Continue reading →

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Low heat units indicate late start to 2023 season

Posted on April 21, 2023 by Nik Wiman

Winter is holding us tight this year in the Willamette Valley, but it may be finally losing its grip. A break in the rain and warmer temperatures in the forecast will be a relief for hazelnut growers with orchards susceptible … Continue reading →

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Hazelnut aphids are out

Posted on April 7, 2023 by Nik Wiman

We have been noting aphid emergence over the last two weeks, but there remain a lot of unhatched eggs around the buds and on the bark. The unhatched eggs remaining may be primarily filbert aphid, Myzocallis coryli, as most of … Continue reading →

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Organic production research – Orchard Crops Research and Extension Program

Posted on August 19, 2022 by Nik Wiman

Organic Hazelnut Farm Tour E-Handout, Aug. 19, 2022 Nik G. Wiman (+ Team), Orchard Specialist & Associate Professor contact: Nik.Wiman@oregonstate.edu Organic Pest Management Aphids Aphid management tactics Aphid biological control Filbertworm Organic sprays BMSB Organic sprays Biological Control Cultural Practices … Continue reading →

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Filbertworm eggs in the orchard

Posted on July 23, 2022 by Nik Wiman

Orchards in the Willamette Valley have now received enough heat units to have filbertworm eggs (>815 degree-days since April 1) and most have now achieved first egg hatch (955 degree-days). Some orchards will already have a few larvae entering nuts … Continue reading →

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BMSB egg masses and nymphs now in orchards

Posted on July 20, 2022 by Nik Wiman

Brown marmorated stink bug (BMSB, Halyomorpha halys) is a direct pest of hazelnuts across its invaded range worldwide including in the Pacific Northwest. Our program began redistribution efforts of the biological control agent Trissolcus japonicus soon after it was discovered … Continue reading →

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Rusty Tussock Moth in Hazelnuts

Posted on July 19, 2022 by Nik Wiman

We have noted the presence of rusty tussock moth (Orgyia antiqua) feeding in our hazelnut plots for the last two seasons. This insect seems not to be a pest, only an incidental feeder that causes minor defoliation. The larvae are … Continue reading →

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