Occurrence of Erysiphe flexuosa (syn. Uncinula flexuosa) on horse chestnut (Aesculus hippocastanum) in Hungary

Kiss, Levente; Vajna, L.; Fischl, Géza

doi:10.1111/j.0032-0862.2004.00989.x

“…It infects and forms pycnidia within powdery mildew hyphae, conidiophores, and cleistothecia. This study corroborates with early reports that Pycnidia of Ampelomyces attack and is commonly found the cells of the hyphae and conidiophores of powdery mildew fungi worldwide (Falk et al,1995;Kiss et al, 2004).This parasitism reduces growth and may eventually kill the mildew colony. Directed growth of germ-tubes of Ampelomyces towards cashew powdery mildew hyphae was also been observed (Sundheim and Krekling, 1982).The mechanism of biocontrol by the fungus has been established as hyper-parasitism as this fungus possess the ability to colonize the mycelium of powdery mildew and produce reproductive structures.…”

Section: Screening Of Ampelomyces Quisqualis On Cashew Powdery Mildewsupporting

confidence: 92%

Biological control of cashew powdery mildew using Ampelomyces quisqualis Ces

Dominic

¹

,

Marthamakobe

²

2017

JBC

1

0

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ABSTRACT:The evaluation of the possibility of exploiting Ampelomyces quisqualis, mycoparasitic fungi for the biocontrol of cashew powdery mildew (Oidium anacardii) was studied. An in vitro biological control test on detached leaves of cashew was used and a detailed microscopic analysis of the interactions between mycoparasite and O. anacardii conducted. Effect of mycoparasite on disease severity and incidence was discussed. Ampelomyces quisqualis was confirmed as a mycoparasite of O. anacardii. When grown near the pathogen, A. quisqualis was seen entwining around the pathogen mycelium. It was stimulated to produce branches that grew directly to the mycelium of pathogen Ampelomyces quisqualis firm attachment on the pathogen conidia resulted in the penetration and successful growth. Some of the impregnated O. anacardii conidia were found dead. Koch's postulates were satisfied to establish the mycoparasitism of A. quisqualis.

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“…It infects and forms pycnidia within powdery mildew hyphae, conidiophores, and cleistothecia. This study corroborates with early reports that Pycnidia of Ampelomyces attack and is commonly found the cells of the hyphae and conidiophores of powdery mildew fungi worldwide (Falk et al,1995;Kiss et al, 2004).This parasitism reduces growth and may eventually kill the mildew colony. Directed growth of germ-tubes of Ampelomyces towards cashew powdery mildew hyphae was also been observed (Sundheim and Krekling, 1982).The mechanism of biocontrol by the fungus has been established as hyper-parasitism as this fungus possess the ability to colonize the mycelium of powdery mildew and produce reproductive structures.…”

Section: Screening Of Ampelomyces Quisqualis On Cashew Powdery Mildewsupporting

confidence: 92%

Biological control of cashew powdery mildew using Ampelomyces quisqualis Ces

Dominic

¹

,

Marthamakobe

²

2017

JBC

View full text Add to dashboard Cite

ABSTRACT:The evaluation of the possibility of exploiting Ampelomyces quisqualis, mycoparasitic fungi for the biocontrol of cashew powdery mildew (Oidium anacardii) was studied. An in vitro biological control test on detached leaves of cashew was used and a detailed microscopic analysis of the interactions between mycoparasite and O. anacardii conducted. Effect of mycoparasite on disease severity and incidence was discussed. Ampelomyces quisqualis was confirmed as a mycoparasite of O. anacardii. When grown near the pathogen, A. quisqualis was seen entwining around the pathogen mycelium. It was stimulated to produce branches that grew directly to the mycelium of pathogen Ampelomyces quisqualis firm attachment on the pathogen conidia resulted in the penetration and successful growth. Some of the impregnated O. anacardii conidia were found dead. Koch's postulates were satisfied to establish the mycoparasitism of A. quisqualis.

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“…Horse‐chestnut leaves are sensitive to a number of powdery mildews such as the North American Erysiphe flexuosa (Peck) Barun & Takamatsu (Ascomycota, Erysiphales), introduced to Europe at the turn of the century (Ale‐Agha, Braun, Feige, & Jage, ; Kiss, Vajna, & Fischl, ; Stankeviciene, Snieskiene, & Lugauskas, ; Tozlu & Demirci, ; Zimmermannová‐Pastirčáková & Pastirčák, ) including Britain (Ing & Spooner, ). Erisiphe flexuosa also affects A. carnea (Irzykowska et al., ; Werner, Irzykowska, & Karolewski, ).…”

Section: Herbivory and Diseasementioning

confidence: 99%

Biological Flora of the British Isles:Aesculus hippocastanum

Thomas

¹

,

Alhamd

²

,

Iszkuło

³

et al. 2019

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This account presents information on all aspects of the biology of Aesculus hippocastanum L. (horse‐chestnut) that are relevant to understanding its ecological characteristics and behaviour. The main topics are presented within the standard framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characters, herbivores and disease, history and conservation. Aesculus hippocastanum is a large deciduous tree native to the Balkan Peninsula. Native populations are small (<10,000 trees total) and apparently in decline, but the tree has been widely planted in gardens and streets across Europe and other temperate areas from the 17th century onwards. It was voted the UK's favourite tree in a 2017 poll. As a British neophyte, it is occasionally naturalised in open wooded habitats. Horse‐chestnut is renowned for the beauty of its large (up to 30 cm long), upright panicles of white flowers, and for the large seeds (up to 42 g each) used in the formerly common children's game of “conkers.” More recently, the triterpene glycosides, extractable from various plant parts but especially the seeds, have been widely used in medicine. In much of Europe, horse‐chestnut is affected by chestnut bleeding canker (caused by Pseudomonas syringae pv. aesculi), the horse‐chestnut leaf miner Cameraria ohridella and the leaf blotch fungus Guignardia aesculi. The canker is likely to lead to death of <10% individuals, but seeds of plants infested with the leaf miner are 40%–50% smaller, which may affect long‐term establishment in non‐planted areas.

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Occurrence of Erysiphe flexuosa (syn. Uncinula flexuosa) on horse chestnut (Aesculus hippocastanum) in Hungary

Cited by 11 publications

References 3 publications

Biological control of cashew powdery mildew using <i>Ampelomyces quisqualis</i> Ces

Biological control of cashew powdery mildew using <i>Ampelomyces quisqualis</i> Ces

Biological control of cashew powdery mildew using <i>Ampelomyces quisqualis</i> Ces

Biological Flora of the British Isles:Aesculus hippocastanum

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