These territorial animals can cause major problems in nursery production Both moles and gophers can be a menace to nursery production fields. As these animals look to survive a lack of available food during summer heat or winter cold, they often look to nursery crops, killing them or causing severe damage. The difference between gopher […]
Villains of the greenhouse II
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When 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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Part 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 […]
Testing tolerance with Marengo
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Herbicide’s label allows growers to experiment with various plants and levels Herbicides are an important weed control method in container-grown ornamental plants. Knowledge of crop tolerance to herbicides is essential for a safe and effective weed control program. Tolerance to a specific herbicide application method depends on the crop species and the cultivar. Thus, developing […]
Restoring a conifer classic
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Breeding 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 […]
Villains of the greenhouse
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When seedlings fail, Rhizoctonia damping-off, root and stem rot may be the cause There is so much hope for the future when we plant seeds, but that can be dashed when they don’t emerge, or when they fall over soon after popping out of the media. There are many fungi that live and survive in […]
The battle with Bambi
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Growers have several tools available to defend against plant damage from deer and elk Oregon’s deer and elk are prized by hunters and non-hunters alike, and thus represent an income-generating game and wildlife-viewing species for many communities across the state. But for many nursery operators, these majestic animals are a serious detriment. Deer, elk, and […]
Silicon: the non-essential beneficial nutrient for plant defense?
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Rhododendrons and azaleas are the backbone of many ornamental landscapes in the Pacific Northwest. Unfortunately, since 2016, a beautiful little insect has been plaguing the genus Rhododendron, causing aesthetic and physiological damage, which may lead to plant death if left unchecked (Figure 1). Preliminary studies suggest that cultivars vary in their tolerance to azalea lace […]
Protecting lawns against European chafer
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These control strategies can help mitigate damage to turfgrass The European chafer (Amphimallon majale) is a beetle that feeds on turfgrass roots causing substantial damage. In more recent years, this invasive insect has been confirmed in the Pacific Northwest and British Columbia. Populations have been observed as early as 2015 in Portland, Oregon and Seattle […]
Pest management tools for minor crops
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How IR-4 and OSU are working for you With a 2018 farm gate value just shy of $1 billion, it is no secret that the ornamental plant industries in Oregon (nursery and greenhouse) are important and viable enterprises that contribute greatly to the state’s economy. Controlling insect, disease, and weed pests is an important part […]
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