Pathogen & Nematode Management

Pathogens, those infectious organisms that reduce crop yield and/or quality, must be managed to reduce the damage they cause to levels that do not affect farmers’ profitability, but with an eye to maintaining environmental and human health. Alternatives to pesticides, better use of pesticides, and use of better pesticides (less toxic, targeted specifically to pest, lower effective rates, etc.) are all options to increase sustainability.

Featured Publications

Effects of Mykos Gold Granular, an arbuscular mycorrhizal fungi inoculant, on pink root, white rot, and crop growth in spring- and fall-planted sweet onion crops near Walla Walla, WA, 2017-2018.

du Toit, L.J., Derie, M.L., Holmes, B.J., Miller, C.E., Morgan, P., Brouwer, L.R., Waters, T.D., and Darner, J. 2020. Plant Disease Management Reports 14:V060.

Visit Effects of Mykos Gold Granular, an arbuscular mycorrhizal fungi inoculant, on pink root, white rot, and crop growth in spring- and fall-planted sweet onion crops near Walla Walla, WA, 2017-2018.

Effects of an arbuscular mycorrhizal fungus inoculant and a mycorrhizal stimulant on pink root and productivity of dehydration onion crops near Paterson, WA, 2016.

du Toit, L.J., Derie, M.L., Holmes, B.J., Winkler, L.R., Waters, T.D., and Darner, J. 2020. Plant Disease Management Reports 14:V062.

Visit Effects of an arbuscular mycorrhizal fungus inoculant and a mycorrhizal stimulant on pink root and productivity of dehydration onion crops near Paterson, WA, 2016.

Effects of three arbuscular mycorrhizal fungi inoculants on pink root and yield in an onion crop near Othello, WA, 2017.

du Toit, L.J., Derie, M.L., Holmes, B.J., Miller, C.E., Brouwer, L.R., Waters, T.D., and Darner, J. 2020. Plant Disease Management Reports 14:V061.

Visit Effects of three arbuscular mycorrhizal fungi inoculants on pink root and yield in an onion crop near Othello, WA, 2017.

Biofumigant Cover Cropping in Potatoes: Dale Gies (Farmer to Farmer Case Study Series)

Yorgey, G.G., S.I. Kantor, C.E. Kruger, K.M. Painter, H. Davis, and L.A. Bernacchi. 2017. Pacific Northwest Extension Publication 693, Pullman, WA.

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Disease Management for Wheat and Barley

Kirby, E., T. Paulitz, T. Murray, K. Schroeder, X. Chen. 2017. Chapter 10 In Yorgey, G. and C. Kruger, eds. Advances in Dryland Production Systems in the Pacific Northwest. Washington State University Extension, Pullman, WA.

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Pythium species associated with damping-off of pea in certified organic fields in the Columbia Basin of central Washington

Alcala, A.C., Paulitz, T.C., Schroeder, K.L., Porter, L.D., Derie, M.L., and du Toit, L.J. 2016. Plant Disease 100:916-925.

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High Residue Farming Under Irrigation: Pest Management Considerations (series 4 of 5)

McGuire, A. This publication is the fourth in a series on high residue farming (HRF), for farmers who are interested in HRF. This publication gives an overview of the effects of adopting HRF on the management of weeds, insects, and diseases. EM074E.

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Mustard Green Manures

On-farm research has been conducted since 1999 to determine the benefits of mustard green manures and to improve their effectiveness. They are being used in irrigated regions of Eastern Washington to improve soil quality, control wind erosion, and manage soilborne pests.

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Apple Replant Disease – Alternatives to Fumigation

Dr. Mark Mazzola, USDA-ARS Tree Fruit Research Lab, Wenatchee, WA. Website highlighting several publications on Apple Replant Disease.

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Additional Publications

WSU Integrated Pest Management

WSU Entomology IPM website. Links to information on statewide IPM activities in Washington including crops, turf, garden, school grounds, and riparian buffers.

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Advances in Brassica seed meal formulation and application protocol for control of apple replant disease.

M. Mazzola poster, December 2010, Wash. St. Hort. Assoc. meeting. A summary of the most recent field results using brassica seed meal mixtures.

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