Mary Ruth McDonald

Professor

University of Guelph

Canada

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Mary Ruth McDonald is a Professor at the University of Guelph, Canada. Her research areas include plant pathology, genetics, and agricultural sustainability, as reflected in her recent articles on topics such as boron sensitivity in Brassica species, drone-based early detection of clubroot in canola, and the influence of soil phosphorus levels on mycorrhizal communities. She is actively involved in investigating agricultural practices that enhance crop performance and reduce environmental impacts.

Articles (20)

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2025

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2021

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2021

Collaborators (1)

Lindsey du Toit

Professor & Extension Plant Pathologist

Washington State University

UNITED STATES

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Mary Ruth McDonald

Research Interests

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Articles (20)

Optical Density Assay to Determine the Sensitivity of Globisporangium and Pythium Isolates to Mefenoxam

Synchrotron assessment of boron sensitivity and storage in Brassica napus and B. rapa

Early detection of clubroot in canola using drone-based hyperspectral imaging and machine learning

Application of a SYBR green qPCR assay for Ilyonectria radicicola (Cabral) in ginseng garden soil

Genetic architecture of anthocyanin pigment traits and purple spot (Stemphylium vesicarium) resistance in an F1 pseudo‐testcross population of asparagus

The first single-cell sequencing of Plasmodiophora brassicae reveals genetic diversity and clonal dynamics

Effective cover crop species and early establishment techniques for reducing winter erosion in muck soil of the Holland Marsh

Yield of yellow cooking onions is not affected by added phosphorous fertilizer in muck soils with high soil test phosphorus in Ontario

First Report of Apple Bitter Rot Caused by Colletotrichum godetiae in Ontario

Influence of plant species, mycorrhizal inoculant, and soil phosphorus level on arbuscular mycorrhizal communities in onion and carrot roots

Characterization of a virulence factor in Plasmodiophora brassicae, with molecular markers for identification

Weed hosts and winter survival of Stemphylium vesicarium on onion in Ontario, Canada

Grasses and field crops reduce the concentration of resting spores of Plasmodiophora brassicae in soil under controlled conditions

Human vs. Machine, the Eyes Have It. Assessment of Stemphylium Leaf Blight on Onion Using Aerial Photographs from an NIR Camera

Stemphylium Leaf Blight: A Re-Emerging Threat to Onion Production in Eastern North America

Optimizing methods to sample and quantify stem and bulb nematode, Ditylenchus dipsaci, in garlic, Allium sativum, field soil

Ditylenchus dipsaci and Fusarium oxysporum on garlic: one plus one does not equal two

The Role of Ascospores and Conidia, in Relation to Weather Variables, in the Epidemiology of Stemphylium Leaf Blight of Onion

Changes in the range and virulence of Plasmodiophora brassicae across Canada

Fungicide efficacy and timing for the management of Stemphylium vesicarium on onion

Collaborators (1)

Lindsey du Toit

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