Methods to reduce the spread of the black rot pathogen, Xanthomonas campestris pv. campestris, in brassica transplants

Krauthausen, H. J.; Laun, N.; Wohanka, W.

doi:10.1007/bf03356375

Cited by 26 publications

(18 citation statements)

References 8 publications

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“…The major sources of inoculum of black rot, which is caused by Xcc, are contaminated seeds or transplants grown from contaminated seeds (Krauthausen et al 2006) and Xcc-contaminated debris from the previous crop. Black rot-inducing Xcc strains have been isolated from cruciferous weeds (Shepherd's Purse) and contaminated non-cruciferous weeds from black rot infested fields (Krauthausen, Laun and Wohanka 2011). Black rot infested Shepherd's Purse can maintain the pathogenic potential of Xcc for over two successive overwinter periods and that indicates the potential to serve as a source of primary inoculum in the spring.…”

Section: Ecological Genomicsmentioning

confidence: 99%

Mechanistic insights into host adaptation, virulence and epidemiology of the phytopathogenXanthomonas

Potnis

Dow

et al. 2019

FEMS Microbiology Reviews

199

165

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Xanthomonas is a well-studied genus of bacterial plant pathogens whose members cause a variety of diseases in economically important crops worldwide. Genomic and functional studies of these phytopathogens have provided significant understanding of microbial-host interactions, bacterial virulence and host adaptation mechanisms including microbial ecology and epidemiology. In addition, several strains of Xanthomonas are important as producers of the extracellular polysaccharide, xanthan, used in the food and pharmaceutical industries. This polymer has also been implicated in several phases of the bacterial disease cycle. In this review, we summarise the current knowledge on the infection strategies and regulatory networks controlling virulence and adaptation mechanisms from Xanthomonas species and discuss the novel opportunities that this body of work has provided for disease control and plant health.

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Section: Ecological Genomicsmentioning

confidence: 99%

Mechanistic insights into host adaptation, virulence and epidemiology of the phytopathogenXanthomonas

Potnis

Dow

et al. 2019

FEMS Microbiology Reviews

199

165

View full text Add to dashboard Cite

show abstract

“…While it is true that plant nurseries take strict sanitation and control measures and therefore disease risks may be considered low, there are several bacterial and fungal diseases that are highly problematic during the nursery stage, including Xanthomonas campestris (Krauthausen et al 2011); C. michiganesis (Frenkel et al 2016) and oomycetes pathogens such as Pythium aphanidermatum (Hendrix, Campbell 1973). Moreover, biochar positive or negative effects on plant responses may be long-lived, as suggested by Elmer and Pignatello (2011) and Elmer (2016), who reported a decrease in asparagus plant size in the second year of their experiment.…”

Section: The Challenge Of the U Shape Effect: How To Use Biochar In Smentioning

confidence: 99%

The Effect of Biochar on Plant Diseases: What Should We Learn While Designing Biochar Substrates?

Frenkel

Jaiswal

Elad

et al. 2017

Journal of Environmental Engineering and Landscape Management

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The increasing demand for soilless substrates and rising environmental concerns about the use of non-renewable resources such as peat has led to the search for alternative constituents of growing mixtures for containerized plants. In this report we reviewed the works concerning biochar as constituent of growing media, targeting its influence on plant growth and plant disease. Biochar mostly has positive or neutral influences on plant growth compared with peat media when present in concentrations higher than 25% (v:v). However, studies of biochar influence on plant disease reveals that while lower concentrations (≤1%) of biochar often suppressed several diseases, higher concentrations (≥3%) were mostly ineffective or induced plant disease. For use as horticultural peat replacement, it is recommended that biochar feedstocks and concentrations be standardized and the potential effect of biochar on plant disease be considered, so that growers can rely on consistent and reproducible biochars for desired effects.

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“…A concentration of 3 mg · L -1 ClO 2 was effective against X. campestris pv. campestris in brassica transplants (Krauthausen et al, 2011). These results indicate that ClO 2 can be used as an antimicrobial agent against certain microorganisms.…”

Section: Resultsmentioning

confidence: 70%

“…ClO 2 has broad antimicrobial efficiency against many pathogenic and spoilage microorganisms, such as E. coli O157:H7, Salmonella sp., Penicillium expansum, and Xanthomonas campestris pv. campestris (Krauthausen et al, 2011;Mahmoud et al, 2008;Okull et al, 2006). It reduces microorganism populations by oxidation, mainly through the one-electron transfer mechanism, in which the compound itself is reduced to chlorite (Netramai et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

The Effect of Controlled-release Chlorine Dioxide on the Preservation of Grapefruit

Baldwin¹,

Ference²,

Narciso³

et al. 2017

horts

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The effect of controlled-release chlorine dioxide (ClO2) gas on the safety and quality of grapefruit was studied. The experiments were run under controlled chamber systems with inoculated fruit, and in boxed fruit under commercial conditions. For the inoculation test, fruit artificially inoculated with either Escherichia coli or Penicillium digitatum, or naturally inoculated Xanthomonas citri ssp. citri (Xcc) (fruits with citrus canker lesions), were incubated in a chamber containing a dose equivalent to 0–60 mg·L−1 of pure ClO2 as an antimicrobial agent. After 24 hours, the microbial population on treated grapefruit was significantly reduced compared with that of control fruit: a dosage of 5 mg·L−1 completely inhibit the growth of E. coli and P. digitatum, but a dosage of 60 mg·L−1 was needed to completely kill Xcc. For the simulated commercial experiment, fruit were harvested in late Oct. 2015 passed through a commercial packing line, and packed in 29 L citrus boxes. ClO2 packets were attached to the top lids with the following five treatments: fast-release, slow-release, slow/fast-release combination (each containing 14.5 mg·L−1 of pure ClO2), double dose fast-release (containing 29 mg·L−1 of ClO2), and control. After 6 weeks of storage at 10 °C (to simulate storage and transportation) + 1 week of storage at 20 °C (to simulate retail marketing), the fruit quality was evaluated. The slow-release treatment at standard dose exhibited the best antimicrobial activity, reducing total aerobic bacterial count and yeast/mold count by 0.95 and 0.94 log colony-forming units (cfu)/g of fruit, respectively, and maintained the best visual, sensory, and overall quality. However, the higher dosage treatments resulted in phytotoxicity as evidenced by peel browning.

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Methods to reduce the spread of the black rot pathogen, Xanthomonas campestris pv. campestris, in brassica transplants

Cited by 26 publications

References 8 publications

Mechanistic insights into host adaptation, virulence and epidemiology of the phytopathogenXanthomonas

Mechanistic insights into host adaptation, virulence and epidemiology of the phytopathogenXanthomonas

The Effect of Biochar on Plant Diseases: What Should We Learn While Designing Biochar Substrates?

The Effect of Controlled-release Chlorine Dioxide on the Preservation of Grapefruit

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