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Air Pollution (Ozone) Jay W. Pscheidt, Extension Plant Pathology Specialist, OSU There is great interest in air quality all over the Western United States when smoke from forest fires fills valleys during the summer. Most of the smoke problem is due to sm ...
Fungicide Theory of Use and Mode of Action J.W. Pscheidt, Extension Plant Pathology Specialist, OSU Fungicides can be classified by chemical group, general mode of action, specific mode of action, or by physical properties once in the plant. Many fungicid ...
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Fungicide Families or Groups A grower should use fungicides with different modes of action. Tank-mix or rotate materials found in different fungicide families or groups to prevent or delay the development of resistant fungi. Groups below are not arranged ...
Horticultural Spray Oils Dr. Doug Walsh, IPM Coordinator, Washington State University Dr. Frank Zalom, IPM Program Director, University of California Dr. Gary Grove, Plant Pathologist, Washington State University Adapted by Jay W. Pscheidt from a similar ...
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Fungicides for Disease Management in the Home Landscape J.W. Pscheidt, Extension Plant Pathology Specialist, OSU Many fungicides are registered for use on commercially produced plants, but only a few are readily available to home gardeners. Most fungicide ...
Plant Viruses ...
Diagnosis and Management of Phytophthora Diseases J.W. Pscheidt, Extension Plant Pathology Specialist, OSU The first step in managing any of the several diseases caused by Phytophthora spp. is to obtain an accurate diagnosis. Although Phytophthora is a re ...
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Plants Susceptible to Phytophthora Diseases Plants in the PNW Susceptible to Phytophthora Diseases Genus Common Name Abies * true fir Alnus alder Araucaria monkey puzzle Arbutus madrone Arctostaphylos kinnikinnick Brassica cabbage Buxus* boxwood Calluna* ...
Oregon Quarantines The following diseases are quarantined against shipment into and within Oregon. Oregon also has several control areas designed to protect specific counties or designated areas from diseases and pests of regulatory concern that may exist ...
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Oregon’s Most Unwanted: Invasive Species Invasive species are those plants, animals, and microbes not native to a region which, when introduced either accidentally or intentionally, out-compete native species for available resources, reproduce prolificall ...
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