Root and crown rot of strawberry caused by Pythium helicoides and its distribution in strawberry production areas of Japan

Ishiguro, Yasushi; Otsubo, Kayoko; Watanabe, H.; Suzuki, Mikihiko; Nakayama, Keiichi I.; Fukuda, Takashi; Fujinaga, Masashi; Suga, Haruhisa; Kageyama, Koji

doi:10.1007/s10327-014-0520-8

Cited by 19 publications

(7 citation statements)

References 15 publications

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“…The results of our two studies on isolates from strawberry fields reveal a new insight taking in consideration that, in practice, more than one pathogen species is often present in the field. Our example of pathogens of the class Peronosporomycetes on strawberries demonstrates the wide spectrum of more or less related members of this class participating in the damage to the plants ( Watanabe 1977;Watanabe et al 1977;Suzui et al 1980;Eden & Hill 1998;Irzykowska et al 2005;Abad et al 2008;Rytkönen et al 2012;Ishiguro et al 2014;Rahman et al 2014;de Cock et al 2015;Mouden et al 2016;Barboza et al 2017;Toljamo et al 2017;Shennan et al 2018), which evince high differences in the sensitivity to one chemical compound. Many of these pathogens could be present together in the same field at the same time.…”

Section: Discussion and Future Prospectsmentioning

confidence: 80%

“…Plant Protection Science https://doi.org/10.17221/42/2021-PPS tophthora and especially of its related genera Pythium, Globisporangium and Phytopythium, whose importance for strawberries is unclear. Since these pathogens often induce symptoms in strawberry plants which are similar to those caused by P. cactorum (Ishiguro et al 2014), determination of the cause that relies solely on the symptoms may lead to their misidentification, and to the mismatched attribution of damage exclusively to P. cactorum.…”

Section: Reviewmentioning

confidence: 99%

“…Members of the mentioned Pythium, Globisporangium and Phytopythium genera are commonly widespread pathogens of agricultural crops, as well as of plants in natural stands. The genus Phytopythium, which currently includes 29 formally characterised species, was recently separated from the genus Pythium (Bala et al 2010;Tao et al 2011;Ishiguro et al 2014;de Cock et al 2015;Benfradj et al 2017). The genus Pythium comprises more than 250 species, usually plant pathogens; some species originally included in this genus have recently been assigned to the genus Globisporangium (Uzuhashi et al 2010).…”

Section: Reviewmentioning

confidence: 99%

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Use of metalaxyl against some soil plant pathogens of the class Peronosporomycetes - A review and two case studies

Pánek¹,

Helmer²,

Ali³

2022

Plant Prot. Sci.

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Upon its discovery and implementation in plant protection, metalaxyl became one of the most important fungicides against Phytophthora infestans, but its efficiency has also been proven against other soil pathogens of the class Peronosporomycetes. The most important genus – Phytophthora comprises more than 150 plant pathogens, which cause significant losses in crop production or damage to natural plant associations. Many species of related genera Pythium, Phytopythium and Globisporangium have a similar ability as the species of Phytophthora. Those pathogens are able to quickly spread in wet soils by actively movable zoospores or in the air by means of zoosporangia; they are able to persist in an environment for long periods once they are introduced into the locality, having durability from their resting structures (chlamydospores, hyphal swelling and oospores). Metalaxyl has proven to be very efficient against these pathogens. However, shortly after its release, the rapid development of resistance against this compound was recorded in many species of the class Peronosporomycetes. Such easily developed resistance is due to the monogenic nature of the resistance, which also determines any anti-resistant strategies. The solution of this issue rests in the cautious use of metalaxyl, with consideration given to these strategies, and should be based also on precise information about the environment and the present pathogenic agents.

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Section: Discussion and Future Prospectsmentioning

confidence: 80%

Section: Reviewmentioning

confidence: 99%

Section: Reviewmentioning

confidence: 99%

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Use of metalaxyl against some soil plant pathogens of the class Peronosporomycetes - A review and two case studies

Pánek¹,

Helmer²,

Ali³

2022

Plant Prot. Sci.

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“…After that, there were few reports of the pathogen until it was isolated on miniature rose in Gifu, Japan [4]. Since then it has caused root and stem rot in other agricultural important plants in Japan, including kalanchoe, kiwi, and strawberry [5,6]. Furthermore, it has recently caused root rot and stem rot in bell pepper and pistachio in the USA [7], citrus mandarin and kiwi fruit in china [8,9], and rose in Korea [10].…”

Section: Introductionmentioning

confidence: 99%

Population structures of the water-borne plant pathogen Phytopythium helicoides reveal its possible origins and transmission modes in Japan

et al. 2018

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The purpose of this study was to clarify the genetic diversity of Phytopythium helicoides and to understand the transmission mode of the pathogen in Japan. In total, 232 P. helicoides isolates were collected from various host plants and geographic origins, including farms and natural environments. We developed 6 novel microsatellite markers for use in the study and found 90 alleles among the 6 markers in the 232 isolates. The analysis of molecular variance suggested that P. helicoides has high variance within individuals and low fixation indices between populations. A phylogenetic analysis revealed that isolates collected from the same hosts and/or geographic origins were often grouped together. For example, several isolates from natural environments were grouped with isolates from nearby agricultural areas. On the other hand, 2 geographically distant populations collected from the same host plant had similar genotypes. Our results suggested that migration of the pathogen could be facilitated naturally via drainage systems or by human activity in the transport of agricultural materials.

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“…Chrysanthemums are an economically important crop; U.S. wholesale totals for potted and cut flowers amounted to $150 million in 2019 (USDA NASS, 2020). Phytopythium helicoides has been reported as a pathogen of several floriculture crops, including dahlia, miniature roses, begonia, and poinsettia (Afandi et al, 2018;Drechsler, 1930;Ishiguro et al, 2014;Miyake et al, 2014;Yang et al, 2013). Additionally, P. helicoides was recovered from a containment pond at a collaborating nursery; isolates were used to demonstrate pathogenicity on chrysanthemum in previous greenhouse trials (J. Beaulieu et al, unpublished data).…”

mentioning

confidence: 99%

Improving Containerized Nursery Crop Sustainability: Effects of Conservation-driven Adaptations in Soilless Substrate and Water Use on Plant Growth and Soil-borne Disease Development

Beaulieu

Belayneh

Lea‐Cox

et al. 2022

horts

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Containerized crop production faces increasing sustainability challenges with both soilless substrate and water use. To facilitate use of sustainable practices, we evaluated plant health impacts of two substrates, bark and wood fiber, which we contrasted with peat, a substrate that is slower to renew; this was overlaid with an analysis of the effects of water-saving–targeted irrigation reductions, compared with typical well-watered conditions. Health impacts were evaluated in two crops, considering both physiological and disease impacts for tomato with and without Phytophthora capsici, and chrysanthemum with and without Phytopythium helicoides. Substrate type was a strong determinant of plant health, wherein crops grown in a HydraFiber-peat mix (“fiber”) performed worse than those in bark and peat, with up to a 50% and 45% reduction in shoot biomass in tomato and chrysanthemum, respectively (P < 0.001). Tomato decline incidence from P. capsici was 3–6 times higher in fiber than other substrates, and fiber was the only substrate where the effect of P. capsici enhanced decline and rot development compared with noninoculated plants (P < 0.05). In bark, reduced irrigation consistently inhibited tomato and chrysanthemum growth and shoot water content (typically P < 0.001). In peat, whereas tomato growth was inhibited under reduced irrigation (P = 0.012–0.013), chrysanthemum growth was often unaffected. Growth in fiber was uniformly poor regardless of irrigation regime for both crops, and an irrigation treatment effect was not typically apparent. Reduced irrigation enhanced pathogen effects in fiber and peat for tomato and fiber and bark for chrysanthemum (P < 0.05). This is perhaps the first study to evaluate HydraFiber interactions with disease and reduced irrigation and suggests that this product consistently incurs costs to crop productivity. However, the peat-replacing bark substrate has strong potential to optimize plant growth physiologically and via disease suppression and can be used under reduced irrigation without compromising economic productivity of the system.

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Root and crown rot of strawberry caused by Pythium helicoides and its distribution in strawberry production areas of Japan

Cited by 19 publications

References 15 publications

Use of metalaxyl against some soil plant pathogens of the class Peronosporomycetes - A review and two case studies

Use of metalaxyl against some soil plant pathogens of the class Peronosporomycetes - A review and two case studies

Population structures of the water-borne plant pathogen Phytopythium helicoides reveal its possible origins and transmission modes in Japan

Improving Containerized Nursery Crop Sustainability: Effects of Conservation-driven Adaptations in Soilless Substrate and Water Use on Plant Growth and Soil-borne Disease Development

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