First Report of <i>Pythium myriotylum</i> Causing Damping-Off of <i>Amaranthus tricolor</i> in Florida

López, Patricia; Sanahuja, Georgina; Suarez, S. N.; Palmateer, Aaron J.

doi:10.1094/pdis-07-17-1132-pdn

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Amaranthus spp. are already recognized as hosts of Pythium (National Research Council 1984), with P. myriotylum reported as a causal agent of damping-off in cultivated amaranth seedlings (Lopez et al 2018). In G. parviflora, the isolates of P. aphanidermatum (Pyt655 and Pyt660), P. ultimum var.…”

Section: Occurrence and Pathogenicity Tests In The Weedsmentioning

confidence: 99%

“…Many weeds have been reported as natural hosts for plant pathogens, such as bacteria, viruses, nematodes, fungi and oomycetes (Black et al 1996;Hollowell et al 2003;French-Monar et al 2006;Rich et al 2009;Barreto et al 2013;Ara ujo et al 2015), but limited information exists regarding the role of weeds as reservoirs of Pythium and Phytopythium species (Kalu et al 1976;Dissanayake et al 1997;Lopez et al 2018;Lodhi et al 2020). This knowledge is fundamental for understanding the epidemiology of diseases caused by these plant pathogens in vegetable crops.…”

Section: Introductionmentioning

confidence: 99%

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Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Barboza

Cabral

Rossato

et al. 2022

Letters in Applied Microbiology

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Significance and Impact of the Study: The presence of weeds in cultivated areas is a limitation on vegetable production in Brazil. Beyond their competition for water, nutrients and light, weeds may be alternative hosts of plant pathogens, favouring their survival and potential increase in population. In this work, six Pythium and two Phytopythium species were identified infecting weeds collected from vegetable fields in Brazil. Most of these Pythium and Phytopythium species identified are polyphagous plant pathogens, attacking many plant species including many vegetables. This finding has ecological and epidemiological significance indicating weeds can be reservoirs and inoculum sources of pathogens for vegetable crops.

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Section: Occurrence and Pathogenicity Tests In The Weedsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Barboza

Cabral

Rossato

et al. 2022

Letters in Applied Microbiology

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“…Cucumber cultivation is usually in soil, with some farmers moving towards the use of hydroponics system .Damping-off disease is as a serious and worldwide problem on numerous agricultural and horticultural crops in fields, greenhouses, gardens, nurseries and forests. Various pathogenic oomycetes (Pythium and Phytophthora) and fungi (Fusarium and Rhizoctonia) have been reported as causal agents of damping-off (LOPEZ et al, 2018;ZHAO et al, 2019). Pythium aphanidermatum is one of the most common causes of damping-off disease, causing 25-75% cucumber seedling losses in Oman .Management strategies in Oman rely on the use of mefenoxam, hymexazole, and propamocarb…”

mentioning

confidence: 99%

Endophytic Enterobacter cloacae exhibits antagonistic activity against Pythium damping-off of cucumber

et al. 2020

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The study was performed to examine the potential presence of biological control agents against Pythium damping-off disease of cucumber.Examining eleven bacterial strains isolated from acid lime roots and rhizosphere soil showed that the bacterial strain RB1 was the most efficient in suppressing mycelial growth of P. aphanidermatum, producing an inhibition zone of 5mm. Scanning electron microscopy study of the mycelia at the interaction zone showed that the pathogen hyphae were deformed and shriveled by the bacterial strain.In pot experiments, pretreatment with the RB1 bacterial strain reduced disease incidence significantly by 63%.The bacterial strain did not exhibit any negative significant effects on cucumber growth (plant height and root dry weight) in comparison with untreated control under growth chamber conditions. Molecular identification of strain RB1 based on the 16S rRNA gene revealed that it is Enterobacter cloacae. Findings from this study suggested that E. cloacae has a potential to be used as a biocontrol agent for suppressingcucumber damping-off disease caused by P. aphanidermatum. This is the first report of the antagonistic activity of E. cloacae against P. aphanidermatum-induced damping-off of cucumber.

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Genomics-Assisted Design of Biotic Stress Resistant Vegetable Amaranths

Dharajiya

Trivedi²,

Thakkar³

et al. 2022

Genomic Designing for Biotic Stress Resistant Vegetable Crops

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First Report of Pythium myriotylum Causing Damping-Off of Amaranthus tricolor in Florida

Cited by 4 publications

References 2 publications

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Endophytic Enterobacter cloacae exhibits antagonistic activity against Pythium damping-off of cucumber

Genomics-Assisted Design of Biotic Stress Resistant Vegetable Amaranths

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