Control of cucumber powdery mildew by the hyperparasite <i>Ampelomyces quisqualis</i> and fungicides

Sundheim, Leif

doi:10.1111/j.1365-3059.1982.tb01270.x

Cited by 65 publications

(43 citation statements)

References 3 publications

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“…After germination, they penetrate hyphae of powdery mildews, continue their growth internally and produce pycnidia in host hyphae, conidiophores and conidium initials (De Bary, 1870 ;Clare, 1964 ; E-mail : lkiss!nki.hu Speer, 1978 ;Hashioka & Nakai, 1980 ;Sundheim & Krekling, 1982 ;Galper, Sztejnberg & Lisker, 1985) and also in young, immature cleistothecia of the host (Emmons, 1930 ;Speer, 1978 ;Falk et al, 1995 a, b). Hyphal fragments of Ampelomyces transported for long distances by the wind within infected powdery mildew conidia could also initiate mycoparasitism of powdery mildew colonies (Jarvis & Slingsby, 1977 ;Speer, 1978 ;Sundheim, 1982).…”

Section: mentioning

confidence: 99%

Natural occurrence of ampelomyces intracellular mycoparasites in mycelia of powdery mildew fungi

Kiss

1998

New Phytologist

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This is the first extensive investigation that quantifies natural mycoparasitic relationships in the phyllosphere. The presence of Ampelomyces spp. was quantified in naturally occurring powdery mildew fungi collected in Hungary and Romania between 1992 and 1995. A total of 570 samples was studied representing 27 species (nine genera) of the Erysiphaceae infecting 41 host plant genera. The incidence of Ampelomyces spp., determined as the proportion of samples in which intracellular pycnidia were present, varied between 4n3 and 68n8 % in the host fungal genera studied. The intensity of mycoparasitism, defined as a percentage of the powdery mildew mycelia parasitized by Ampelomyces, ranged from 0n15 to 65 %. Both the incidence and the intensity of mycoparasitism showed the lowest values in Blumeria graminis (DC.) Speer collected from wild and cultivated monocotyledons, while the highest values were found in Arthrocladiella mougeotii (Le! v.) Vassilkov infecting Lycium halimifolium Mill. plants. The paper reports for the first time the natural occurrence of Ampelomyces in Sawadaea bicornis (Wallr. : Fr.) Homma on maple.

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Section: mentioning

confidence: 99%

Natural occurrence of ampelomyces intracellular mycoparasites in mycelia of powdery mildew fungi

Kiss

1998

New Phytologist

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“…are hyperparasites colonizing mycelium, conidial spores and young fruiting bodies of powdery mildews (Erysiphales) -obligate patogens of plants ( Kiss et al 2004). Ampelomyces are widespread worldwide, they are thermophilic organisms, adapting well to various climatic conditions (Sundheim 1982). They belong to the class of Coelomycetes, Anamorfic fungi -formerly Deuteromycota (Sutton 1980;Kirk et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of the fungi from the genus Ampelomyces – hyperparasites of powdery mildews (Erysiphales) infesting trees and bushes in the municipal environment

2011

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The studies refer to the phenomenon of hyperparasitism in the municipal environment. The paper presents the occurrence of fungi of the genus Ampelomyces on Erysiphales -important group of phytopathogenic fungi. For the first time in Poland analyzed degree of infestation of Erysiphales mycelium by Ampelomyces and effect of the hyperparsites on the degree of infestation plants by Erysiphales. The high participation of the Ampelomyces was noted in each year of the study. Substantial differences were noted in the occurrence of Ampelomyces depending on the developmental stage of the host fungi and considerable differences in the prevalence of the hyperparasites on particular Erysiphales species. In all cases examined, the mean index of infestation of host plants by Erysiphales was higher than the mean degree of infestation of powdery mildew mycelium by Ampelomyces. The results indicate that under natural conditions they do not play any significant role in the reduction of the degree of infestation of host plants by Erysiphales and do not disturb drastically their life cycle.

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“…Ponadto wykazano wysoką Tabela 1. Skuteczność fungicydów i nowych produktów w zwalczaniu amerykańskiego mączniaka agrestu (S. mors-uvae) na agreście (Sundheim 1982;Sztejnberg i wsp. 1989;Ranković 1997).…”

Section: Wyniki I Dyskusja / Results and Discussionunclassified

New possibilities for control of American powdery mildew (Sphaerotheca mors-uvae)

2013

Prog. Plant. Prot.

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SummaryAmerican powdery mildew (Sphaerothec amors-uvae) is one of the most serious diseases of gooseberry and black currant. Only a few fungicides are registered to control this disease. Therefore, searching for new protection methods is of a special value. In 2010-2012, the effectiveness of the biological product AQ 10 WG containing 5 x 10 9 spores/g of fungus Ampelomyces quisqualis and Solfan PK fertilizer (49% potassium as K 2 O and 25% phosphorus as P 2 O 5 ) were studied. In the case of gooseberry cultivar White Triumph both tested compounds limited the severity of disease on shoots and fruits by 70 to 93%. On black currant cultivar Ben Lomond the product AQ 10 WG reduced the infection of shoots in about 60%, and Solfan PK by more than 71%. The tested products revealed a good efficacy in the control of American powdery mildew. In the protection of black currants and gooseberry the effectiveness of these products was the same or lower than standard fungicides (Nimrod 250 EC, Score 250 EC, Signum 33 WG and Topsin M 500 SC).Key words: American gooseberry mildew, control, biological methods, fertilizers StreszczenieAmerykański mączniak agrestu (Sphaerotheca mors-uvae) jest jedną z najgroźniejszych chorób agrestu i porzeczki czarnej. Do jej zwalczania zarejestrowanych jest zaledwie kilka fungicydów, co stwarza konieczność poszukiwania nowych metod ochrony. W latach 2010-2012 oceniano efektywność preparatu biologicznego AQ 10 WG zawierającego 5 x 10 9 zarodników/g grzyba Ampelomyces quisqualis i nawozu Solfan PK (49% potasu w formie K 2 O i 25% fosforu w formie P 2 O 5 ). Zarówno biopreparat, jak i nawóz ograniczyły nasilenie choroby na agreście odmiany Biały Triumf na pędach oraz na owocach od 70 do 93%. W przypadku porzeczki czarnej odmiany Ben Lomond preparat AQ 10 WG ograniczył porażenie pędów o około 60%, a nawóz Solfan PK o ponad 71%. Efektywność testowanych preparatów w ograniczaniu amerykańskiego mączniaka agrestu była wysoka i taka sama lub niższa od skuteczności fungicydów standardowych (Nimrod 250 EC, Score 250 EC, Signum 33 WG i Topsin M 500 SC).Słowa kluczowe: amerykański mączniak agrestu, zwalczanie, metody biologiczne, nawozy Instytut Ogrodnictwa Pracownia Fitopatologii Sadowniczej

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Control of cucumber powdery mildew by the hyperparasite Ampelomyces quisqualis and fungicides

Cited by 65 publications

References 3 publications

Natural occurrence of ampelomyces intracellular mycoparasites in mycelia of powdery mildew fungi

Natural occurrence of ampelomyces intracellular mycoparasites in mycelia of powdery mildew fungi

Occurrence of the fungi from the genus Ampelomyces – hyperparasites of powdery mildews (Erysiphales) infesting trees and bushes in the municipal environment

New possibilities for control of American powdery mildew (Sphaerotheca mors-uvae)

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