A5103240234- Genetic and Environmental Crop Studies
- Plant Pathogens and Fungal Diseases
- Agricultural pest management studies
- Legume Nitrogen Fixing Symbiosis
- Yeasts and Rust Fungi Studies
- Plant Disease Resistance and Genetics
- Plant Pathogens and Resistance
- Agriculture, Plant Science, Crop Management
- Mycorrhizal Fungi and Plant Interactions
- Plant pathogens and resistance mechanisms
- Plant-Microbe Interactions and Immunity
- Fungal Plant Pathogen Control
- Seed and Plant Biochemistry
- Essential Oils and Antimicrobial Activity
- Banana Cultivation and Research
University of Saskatchewan
2008-2025
Agriculture and Agri-Food Canada
2004
niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français étrangers, laboratoires publics privés.
Chickpea fields in Saskatchewan, one of the three Canadian prairie provinces, have suffered from major health issues since 2019, but no definitive cause has been determined. Field surveys were conducted Saskatchewan 2020 and 2021 order to develop a better understanding root rot pathogens associated with chickpea. Root samples analyzed for presence 11 potential chickpea using end-point PCR. Fusarium redolens, F. solani avenaceum most prevalent pathogen species detected both survey years. The...
Abstract Field experiments were conducted during 2002–2004 at Saskatoon, Swift Current and Kyle, Saskatchewan to assess the effect of application frequency, timing rotation different fungicides on suppression ascochyta blight, yield seed quality chickpea cultivars 'Myles', 'Sanford' 'CDC Yuma'. Fungicides tested included chlorothalonil, azoxystrobin, pyraclostrobin, mancozeb boscalid. Ascochyta blight severity ranged from 21 99% in untreated control plots was significantly reduced through...
The infection process of two pathogenic races Colletotrichum truncatum on lentil during the biotrophic phase was studied using susceptible cultivar 'Eston' and 'CDC Robin' which has partial resistance to race 1. Isolates both successfully invaded host tissue cultivars through direct penetration aided by appressoria. Overall, conidial germination appressorial formation detached leaflets were higher for three isolates more virulent 0 than Higher appressorium compared with 1 observed Robin',...
Among lentil diseases reported from around the world, anthracnose caused by fungal ascomycete pathogen Colletotrichum lentis is either not mentioned, or listed as a minor disease. In Canada, it was originally found in Manitoba 1987, where most grown at time, and within 3 years also detected Saskatchewan production moved westwards. Since then, has become important foliar disease on western Canada. Originally described C. truncatum, isolates were designated their own species 'destructivum'...
Ascochyta blight, a fungal disease caused by rabiei (Pass.) Labr. (teleomorph Didymella (Kovačevski) v. Arx), is major constraint to chickpea (Cicer arietinum L.) production. An unusual feature of plants the secretion highly acidic fluid from glandular trichomes. This exudate was shown promote germination conidia A. at low concentrations (0.012 and 0.06 mg·mL 1 ) but inhibit higher (0.3 1.5 ). The removal exudates prior inoculation with increased infection and, subsequently, development in...
Ascochyta blight of chickpea increases rapidly under conditions that are too dry for many other foliar pathogens. The impact leaf wetness (continuous vs. interrupted) and spore density on infection by rabiei were investigated controlled conditions. Disease severity lesion number increased with increasing period (12, 24, 36, 48, 60, 72 h) (1, 2, 3, 4, 5 × 105 conidia·mL–1). time required symptom development decreased density. developed even when inoculated seedlings subjected to a 24-h...
The resistance of 24 perennial Cicer accessions to Ascochyta rabiei (Pass.) Labr. was assessed under field and greenhouse conditions. Two two annual with superior were examined compared susceptible (‘CDC Xena’) resistant Frontier’) domesticated arietinum L. (chickpea) cultivars in terms pathogen colonization, symptom development, host autofluorescence, hydrogen peroxide generation. Colonizing hyphae on the four wild genotypes pigmented, but hyaline cultivated chickpea. morphology colonizing...
Species in the genus Colletotrichum have mating systems that deviate from those of other genera Ascomycota, and for many species only anamorph is known. The teleomorph lentis inducible vitro, but has not been reported nature. A molecular population study based on amplified fragment length polymorphisms was conducted 179 field isolates lentil fields Canadian province Saskatchewan. More than 94% similarity observed among isolates, 130 131 sampled a single shared same haplotype. Genotypic...
Aphanomyces euteiches is an important root pathogen of several legume and forage crops worldwide. Disease management challenging due to resilient oospores that can persist in the soil for long periods time. Several research groups are working towards incorporating disease resistance into crop cultivars involving large-scale screening and, some crops, use molecular markers associated with quantitative trait loci resistance. The refinement laboratory protocols efficient isolation, reliable...
Outbreaks of blossom blight in coriander (Coriandrum sativum) and caraway (Carum carvi) are common western Canada, particularly when cool, wet conditions prevail during flowering, which can lead to total crop loss. Earlier attempts identify the causal organisms were inconclusive, has hampered management been a barrier for effective resistance breeding these two crops. In order address this knowledge gap, pathogenicity isolated from blossoms collected surveys Saskatchewan 2015 2016 was tested...
Under cool and wet conditions, high levels of botrytis grey mould (BGM) can occur on lentil in western Canada. Identification local Botrytis isolates from based conidial morphology (N = 74) sequence analysis 5) indicated that B. cinerea was the predominant cause BGM this region. Eight field experiments at two sites (Saskatoon, SK Outlook, SK) over seasons were conducted to evaluate optimal timing fungicide boscalid for control cultivar 'CDC Grandora'. Weather conditions limited disease...