Phytophthora cryptogea Pethybr. et Laff. als Erreger einer Wurzelfäule an Spinat und deren Abhängigkeit vom Bodenzustand und dem Witterungsverlauf

Kröber, H.; Beckmann, Ernst-Oskar

doi:10.1111/j.1439-0434.1973.tb04164.x

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…MATSUMOTO and SATO (1979) reported that this fungus is able to kill young sugarbeet plants if inoculated with mycelial corn-meal agar pieces at the base of the stems. KROBER (1981) further reported a P. cryptogea isolate originating from B. vulgaris L. var. altissima Doll, but gives no information about the pathogenicity of the isolate.…”

Section: Discussionmentioning

confidence: 97%

“…Depending on the morphological and serological similarities between these two species, many authors suggest that they should not be divided but be considered as one species (BUMBIERIS 1974, HALSALL 1976, GERRETTSON-CORNELL 1979, Ho and JONG 1986, in which case the name P. cryptogea, being the older, has priority. However, other authors find the differences between P. drechsleri and P. cryptogea clear enough to continue to place them as different species (KLISIEWICZ 1977, KROBER 1981. KusiEWiCZ (1977) states that P. drechsleri has sporangia of elongated shape whiJe P. cryptogea differs in having sporangia of more ellipsoid shape, and KROBER (1981) concludes that P. cryptogea clearly differs from P. drechsleri in possessing smaller oogonia and having lower cardinal temperatures.…”

Section: Discussionmentioning

confidence: 99%

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Isolates of Phytophthora cryptogea Pathogenic to Wheat and Some Other Crop Plants

Larsson

Gerhardson

1990

Journal of Phytopathology

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A fungus, of the genus Phyiophthora, frequently isolated from diseased spinach roots and also from field-grown wheat plants in an area in the south of Sweden, was identified as P. cryptogca on the basis of morphology, growth characters and cardinal temperatures. Mycelium or zoospores applied as inoculum in a series of pathogenicity tests induced symptoms in spmach, sugarbeet, wheat, cucumber, oil-seed rape, pea and oats. These ranged from death of all (spinach) or some inoculated plants (sugarbeet and wheat), to only slight root sj'mptoms (oats). Successful re-isolations from all plants tested, confirmed infectivity in all cases. This is the first report ot the occurrence of P. cryptogea in Sweden and, as far as we know, of pathogenidty of this fungus to wheat, oil-seed rape and oats.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Isolates of Phytophthora cryptogea Pathogenic to Wheat and Some Other Crop Plants

Larsson

Gerhardson

1990

Journal of Phytopathology

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Auswirkungen langj�hriger Gr�nd�ngung im Freiland-gem�sebau auf die Bodenqualit�t unter besonderer Ber�cksichtigung pflanzenhygienischer Gesichtspunkte

Beckmann

1977

Plant Food Hum Nutr

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Prevalence and pathogenicity of spinach root pathogens of the genera Aphanomyces, Phytophthora, Fusarium, Cylindrocarpon, and Rhizoctonia in Sweden

Larsson

Olofsson

1994

Plant Pathology

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In a 4‐year disease survey in commercial spinach fields, pathogens were isolated from spinach root pieces placed on selective agar media. Aphanomyces cladogamus was the most abundant pathogen, followed by Phytophthora. cryptogea and Fusarium oxysporum. Rhizoctonia solani was found only occasionally. Other pathogens isolated were F. redolens, F. sambucinum and Cylindrocarpon destructans. P. cryptogea was the most severe pathogen, causing death of most plants, but A. cladogamus also caused severe root damage. Isolates of F. oxysporum ranged from highly pathogenic, i.e. P. oxysporum f.sp. spinaciae race 1. to moderately pathogenic and non‐pathogenic, Rhizoctonia solani isolates also varied widely in their pathogenicity. Only a small number of the F. redotens and F. sambucinum isolates were pathogenic and most C. destructans isolates were weakly pathogenic. Isolation frequencies were relatively stable from year to year, but P. cryptogea was isolated more frequently in autumn than in spring. No clear relationships were found between pathogen prevalence and disease severity index of surveyed field plants, between pathogen prevalence and plant developmental stage, or between prevalence of the different pathogens isolated.

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Phytophthora cryptogea Pethybr. et Laff. als Erreger einer Wurzelfäule an Spinat und deren Abhängigkeit vom Bodenzustand und dem Witterungsverlauf

Cited by 3 publications

References 6 publications

Isolates of Phytophthora cryptogea Pathogenic to Wheat and Some Other Crop Plants

Isolates of Phytophthora cryptogea Pathogenic to Wheat and Some Other Crop Plants

Auswirkungen langj�hriger Gr�nd�ngung im Freiland-gem�sebau auf die Bodenqualit�t unter besonderer Ber�cksichtigung pflanzenhygienischer Gesichtspunkte

Prevalence and pathogenicity of spinach root pathogens of the genera Aphanomyces, Phytophthora, Fusarium, Cylindrocarpon, and Rhizoctonia in Sweden

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