Fusarium Head Blight Inoculum: Species Prevalence and Gibberella zeae Spore Type.
- S. Markell, L. Francl
- Biology, MedicinePlant Disease
- 1 July 2003
Results confirm the predominance of G. zeae inoculum in North America but indicate conidia play an important role in the primary disease cycle.
Identification and characterization of Fusarium spp. associated with root rots of field pea in North Dakota
- K. Chittem, F. Mathew, R. Goswami
- BiologyEuropean journal of plant pathology
- 30 July 2015
The prevalence of F. avenaceum on roots of field peas, and the ability of isolates of this species to cause severe root rot, emphasizes the possibility of this pathogen to emerge as a potential risk under the current cropping practices for pulse crops in North Dakota, and potentially in other regions with similar growing conditions.
Emergence of a novel population of Puccinia striiformis f. sp. tritici in Eastern United States.
- S. Markell, E. Milus
- Biology, MedicinePhytopathology
- 16 May 2008
The data indicated that the contemporary isolates were very distinct from older isolates (collected since 2000) based on virulence and AFLP markers, and that the old population prevalent before 2000 may have been replaced by the contemporary population.
Corn yield loss estimates due to diseases in the United States and Ontario, Canada from 2012 to 2015.
- T. Allen, C. Bradley, J. A. Wrather
- Biology
- 2016
Annual decreases in corn yield caused by diseases were estimated by surveying members of the Corn Disease Working Group in 22 corn-producing states in the United States and in Ontario, Canada from 2012 through 2015 by finding foliar diseases commonly caused the largest estimated yield loss.
Soybean yield loss estimates due to diseases in the United States and Ontario, Canada from 2015-2019
- C. Bradley, T. Allen, K. Wise
- Plant Health Progress
- 15 July 2021
Soybean [Glycine max (L.) Merrill] yield losses as a result of plant diseases were estimated by university and government plant pathologists in 29 soybean-producing states in the United States and in…
Oomycete Species Associated with Soybean Seedlings in North America-Part I: Identification and Pathogenicity Characterization.
- J. Alejandro Rojas, J. Jacobs, M. Chilvers
- Biology, MedicinePhytopathology
- 1 March 2017
This study provides a comprehensive characterization of oomycete species present in soybean seedling roots in the major production areas in the United States and Ontario, Canada and provides a basis for disease management and breeding programs.
Genetic mapping of rust resistance genes in confection sunflower line HA-R6 and oilseed line RHA 397
- L. Gong, T. Gulya, S. Markell, B. Hulke, L. Qi
- Biology, MedicineTheoretical and Applied Genetics
- 14 January 2013
The newly developed molecular markers will facilitate breeding efforts to pyramid the R13 genes with other rust R-genes and accelerate the development of rust-resistant sunflower hybrids in both confection and oilseed sunflowers.
A Coordinated Effort to Manage Soybean Rust in North America: A Success Story in Soybean Disease Monitoring.
The rapid response to the threat of SBR in North America resulted in an unprecedented amount of information dissemination and the development of a real-time, publicly available monitoring and prediction system known as the Soybean Rust-Pest Information Platform for Extension and Education (SBR-PIPE).
Molecular tagging of a novel rust resistance gene R12 in sunflower (Helianthus annuus L.)
- L. Gong, B. Hulke, T. Gulya, S. Markell, L. Qi
- Biology, MedicineTheoretical and Applied Genetics
- 2012
Discovery of the R12 novel rust resistance locus in sunflower and associated markers will potentially support the molecular marker-assisted introgression and pyramiding of R12 into sunflower breeding lines.
Identification of the mutation responsible for resistance to QoI fungicides and its detection in Ascochyta rabiei (teleomorph Didymella rabiei)
- J. A. Delgado, T. Lynnes, R. Goswami
- Biology
- 1 June 2013
This study characterized a fragment of the cytochrome b gene from Ascochyta rabiei isolates collected in North Dakota, USA, that varied in sensitivity to quinone-outside inhibitor (QoI) fungicides, revealing a mutation that changed the codon for amino acid 143 from GGT to GCT, introducing an amino acid substitution from glycine to alanine, which is frequently associated with QoI resistance.
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