Powdery mildews on crops and ornamentals in Canada: a summary of the phylogeny and taxonomy from 2000 – 2019

Liu, Miao; Braun, Uwe

doi:10.1080/07060661.2021.1986744

Cited by 4 publications

(6 citation statements)

References 89 publications

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“…Powdery mildew diseases commonly exhibited symptoms on leaves, young branches, and occasionally on fruits of various agricultural and ornamental plants [30]. The symptoms are characterized by the presence of powdery-looking patches or a diffusive layer of white, yellow, brown, or grayish mycelia and conidiophores on the plant surfaces of the plants.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the Efficacy of the Fermentation Formula of Bacillus velezensis Strain Tcb43 in Controlling Cucumber Powdery Mildew

2023

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Powdery mildew is a prevalent disease that affects cucumber crops, leading to yield reductions and declines in quality. Bacillus sp. strain Tcb43 culture medium was shown to be capable of inhibiting fungal spore germination in previous reports. In this study, the identification of the Tcb43 strain was updated to Bacillus velezensis by using whole-genome sequencing. The strain exhibited tolerance to a wide range of temperatures (12–40 °C), salinities (7–10%), and pH levels (ranging from 5 to 11). Additionally, Tcb43 demonstrated insensitivity to most tested fungicides. A new fermentation formula, Tcb43FBSO, was developed by adding 0.25% soybean oil to the fermented formula (Tcb43FB). This new formula exhibited a shelf life of up to 12 months with the decrease in bacterial count from 5.35 × 108 to 1.97 × 108 cfu/mL. Greenhouse assays showed that the treatment of potted cucumber plants with a 100-fold dilution (100×) of Tcb43FBSO for four weeks resulted in a significant reduction (64.64%) of cucumber powdery mildew compared to the mock group. In large-scale greenhouse trials, the treatment of cucumber plants with 200× of Tcb43FBSO for 5 weeks effectively suppressed powdery mildew disease, with a control rate that reached 76.6% compared to the mock group. These findings highlight the potential of Tcb43 as a biocontrol agent for managing cucumber powdery mildew and suggest its promising application in agriculture.

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Section: Discussionmentioning

confidence: 99%

Evaluating the Efficacy of the Fermentation Formula of Bacillus velezensis Strain Tcb43 in Controlling Cucumber Powdery Mildew

2023

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“…The powdery mildew disease-causing agent in bigleaf hydrangea is Golovinomyces orontii (formerly Erysiphe polygoni DC) [38][39][40]. The name change occurred because there were extensive studies in the taxonomy of powdery mildew fungi [16]. Powdery mildew taxonomy and identification were largely based on teleomorph characteristics.…”

Section: Powdery Mildew In Hydrangeamentioning

confidence: 99%

“…There are over 700 cultivars, with about 150 of those available in the United States trade [14]. Disease tarnishes the beauty, growth, and salability of many ornamental plants, including bigleaf hydrangea [15][16][17]. Plant pathogens that negatively impact ornamental crops are bacteria, fungi, and viruses.…”

Section: Introductionmentioning

confidence: 99%

Powdery Mildew of Bigleaf Hydrangea: Biology, Control, and Breeding Strategies for Resistance

Jennings,

Baysal-Gurel,

Alexander

2024

Horticulturae

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Hydrangea macrophylla, commonly known as bigleaf, garden, French, or florist hydrangea, is the most economically important member of the Hydrangea genus, with a breeding history spanning hundreds of years. Bigleaf hydrangea breeding improvement has largely focused on aesthetic traits and there are few varieties tolerant or resistant to major diseases such as powdery mildew. Powdery mildew is an obligate biotrophic Ascomycete in the order Erysiphales represented by approximately 900 species worldwide. The disease-causing agent in hydrangeas is Golovinomyces orontii (formerly Erysiphe polygoni DC), which tarnishes the beauty, growth, and salability of bigleaf hydrangea plants, especially those packed closely in production environments. Chemical or biological control is commonly used in production. A recently published haplotype-resolved genome of bigleaf hydrangea enables targeted analyses and breeding techniques for powdery mildew resistance. Analyzing transcriptomes of tolerant and susceptible hydrangeas through RNA sequencing will lead to the identification of differentially expressed genes and/or pathways. Concurrent application of marker-assisted selection, genetic transformation, and gene editing will contribute to the development of powdery-mildew-resistant varieties of bigleaf hydrangea. The aim of this review is to give a general overview of powdery mildew, its impact on bigleaf hydrangea, current control methods, molecular mechanisms, and breeding prospects for powdery mildew resistance in bigleaf hydrangea.

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“…Initially, infected areas show discoloration, leading to tissue necrosis and, in fleshy organs like fruits, the development of splits. 4,5 The tar spot, caused by Rhytisma acerinum, follows a distinctive life cycle and pattern of spread. Emerging leaves become vulnerable to infection in spring during cool and wet weather.…”

Section: Introductionmentioning

confidence: 99%

“…The disease affects organs with high vegetative activity, including leaves, herbaceous shoots, and developing fruits. Initially, infected areas show discoloration, leading to tissue necrosis and, in fleshy organs like fruits, the development of splits 4,5 …”

Section: Introductionmentioning

confidence: 99%

Application of sandpaper spray ionization mass spectrometry to comprehensively examine maple leaves infected with distinct fungi

Parasecolo,

Dabija,

Shouk

et al. 2024

J Mass Spectrom

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This study describes a novel application for sandpaper spray ionization mass spectrometry (SPS‐MS), to examine the surface of maple tree (Acer sp.) leaves. By comparing mass spectrometry fingerprints, healthy leaves from those infected with powdery mildew and Rhytisma acerinum were distinguished. Leaves were grated with sandpaper, cut into triangles, and placed before the mass spectrometer, with the addition of a methanol‐formic acid solution. Multivariate statistical analysis categorized the samples into three groups. Overall, SPS‐MS effectively analyzed leaves with infectious microorganisms, potentially aiding in the creation of fungal identification databanks.

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Powdery mildews on crops and ornamentals in Canada: a summary of the phylogeny and taxonomy from 2000 – 2019

Cited by 4 publications

References 89 publications

Evaluating the Efficacy of the Fermentation Formula of Bacillus velezensis Strain Tcb43 in Controlling Cucumber Powdery Mildew

Evaluating the Efficacy of the Fermentation Formula of Bacillus velezensis Strain Tcb43 in Controlling Cucumber Powdery Mildew

Powdery Mildew of Bigleaf Hydrangea: Biology, Control, and Breeding Strategies for Resistance

Application of sandpaper spray ionization mass spectrometry to comprehensively examine maple leaves infected with distinct fungi

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