First Report of Northern Stem Canker Caused by <i>Diaporthe caulivora</i> on Soybean in Western Canada

Abdelmagid, Ahmed; Hafez, M. B.; Lawley, Yvonne; Adam, Lorne R.; Daayf, Fouad

doi:10.1094/pdis-07-18-1185-pdn

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Pod/stem blight was detected in 10% of surveyed fields with the highest prevalence observed in the central region (16%). Northern canker, a disease caused by a related pathogen, Diaporthe caulivora (Abdelmagid et al 2018), was also verified in two fields. The average incidence of pod/stem blight was 5%.…”

Section: Results (Late Survey)mentioning

confidence: 96%

Canadian Plant Disease Survey 2020 Volume 100: Disease Highlights 2019

2020

Canadian Journal of Plant Pathology

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(PHL) provides diagnoses of disorders detected in field crop samples caused by fungi, bacteria, viruses and plant parasitic nematodes, and insect pests of agricultural crops grown in British Columbia. Between January 1 and November 30, 2019, the PHL received 790 samples including Christmas trees, field crops, greenhouse vegetable and floriculture crops, forest nursery seedlings, herbaceous and woody ornamentals, small fruits, tree fruits, nuts and speciality crops for diagnosis. No significantly new, or unusually high level of any disease was detected in the samples. METHODS: The BCAGRI's Plant Health Laboratory provides diagnoses for disorders detected in field crop samples caused by fungi, bacteria, viruses and plant parasitic nematodes, and insect pests of agricultural crops grown in British Columbia. Samples were submitted to the laboratory by ministry staff, growers, agri-businesses, municipalities and Master Gardeners. Diagnoses were accomplished by visual and microscopic examination, culturing onto microbial media, biochemical identification of bacteria using BIOLOG® and serological testing of viruses, fungi and bacteria with micro-well and membrane-based enzyme linked immuno-sorbent assay (ELISA). Molecular techniques (polymerase chain reactions (PCR) (conventional and/or real time) were used for some species-specific diagnoses. General primer PCRs (for fungi and bacteria) were followed by sequencing to identify the organism involved. Some specimens were referred to other laboratories for identification or confirmation of the diagnosis. RESULTS AND COMMENTS: Overall in 2019, British Columbia had mild winter weather conditions in January followed by a severe cold snap in February. Spring was wet as is normal for BC and was followed by a short, dry summer. The wet weather in the spring supported bacterial blights on woody ornamentals, tree fruits and berry crops. Fire blight incidence was higher than usually seen in tree fruit and woody ornamental crops. Summaries of disorders detected in field crop samples/disorders and their causal/ associated agents diagnosed on crop samples submitted to the laboratory are presented in the following Tables 1 to 13 organized by crop category. Diagnoses not listed include: abiotic disorders detected in field crop samples due to nutritional stress, pH imbalance, water stress, drought stress, adverse growing conditions, genetic abnormalities, environmental and chemical stresses including herbicides, fruit abortion due to lack of pollination, insect-related injury and damage where no conclusive causal factor was identified.

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Section: Results (Late Survey)mentioning

confidence: 96%

Canadian Plant Disease Survey 2020 Volume 100: Disease Highlights 2019

2020

Canadian Journal of Plant Pathology

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“…Isolates of Diaporthe/Phomopsis species causing SSC have also been found in other countries, including Canada (Abdelmagid et al, 2019;Hildebrand, 1956), Australia (Stovold & Francis, 1987), Ghana (Asante et al, 1998), China (Chen et al, 2020;Cui et al, 2009;Zhao et al, 2022), Korea (Oh, 1998;Sun et al, 2012), Croatia (Santos et al, 2011;Vratarić et al, 1998), and France, Italy and Spain (Bertolini & Tanzi, 1987;EPPO, 2021;Hilário et al, 2021;Hissek et al, 2017).…”

Section: History Of Distributionmentioning

confidence: 95%

“…aspalathi has promoted the expansion of SSC caused by D . caulivora in different countries (Abdelmagid et al., 2019; Pioli et al., 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Several loci responsible for resistance to D. aspalathi and D. longicolla have been identified and incorporated in breeding programmes (Lin et al, 2022;Maldonado dos Santos et al, 2019). Nevertheless, selection pressure given by the incorporation of soybean resistance loci to D. aspalathi has promoted the expansion of SSC caused by D. caulivora in different countries (Abdelmagid et al, 2019;Pioli et al, 2002).…”

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confidence: 99%

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Current understanding of the Diaporthe/Phomopsis complex causing soybean stem canker: A focus on molecular aspects of the interaction

Mena,

Stewart,

Montesano

et al. 2023

Plant Pathology

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Soybean stem canker (SSC) is an important disease caused by different Diaporthe spp., including D. aspalathi, D. caulivora and D. longicolla, that leads to soybean (Glycine max) yield losses around the world. Most studies have been focused on the morphological characterization and molecular identification of Diaporthe spp. present in SSC lesions. Several soybean resistance loci to Diaporthe spp. causing SSC have been identified, although the molecular identities of the resistance genes are at present unknown. In this review, we summarize the current knowledge on SSC disease, the molecular characterization of Diaporthe spp. and their evolutionary relationships. We highlight how recent genomic and transcriptomic information is allowing significant progress in our understanding of the molecular components and mechanisms underlying Diaporthe infection strategies as well as soybean disease resistance. The information generated, combined with available resources enabling functional genomics, will contribute to the development of breeding strategies for disease resistance, leading to a more sustainable agriculture.

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