Peronospora sordida. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
G. Hall
Keyword(s):  
New York ◽  
North America ◽  
Northern Ireland ◽  
Downy Mildew ◽  
Geographical Distribution ◽  
Plant Pathogen ◽  
Disease Transmission ◽  
Channel Islands ◽  
Rain Splash

Abstract A description is provided for Peronospora sordida. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Scrophularia altaica, S. aquatica, S. auriculata, S. bosniaca, S. californica, S. heterophylla, S. lanceolata, S. marylandica, S. nodosa, S. scopolii, S. umbrosa (=S. alata), Verbascum banaticum, V. blattaria, V. densiflorum (=V. thapsiforme), V. glabratum subsp. glabratum, V. lychnitis, V. nigrum, V. phlomoides, V. phoenicum, V. speciosum, V. thapsus, V. thapsus subsp. crassifolium (=V. montanum), V. virgatum. DISEASE: Downy mildew of Scrophularia and Verbascum, some species of which may be cultivated commercially for their medicinal or ornamental value; an obligately necrotrophic plant pathogen. GEOGRAPHICAL DISTRIBUTION: Asia; USSR (Kirghizia, Turkmenia, Uzbekistan). Europe; Austria, Belgium, France, Czechoslovakia, Denmark, Eire, Finland, Germany, Hungary, Italy, Netherlands, Norway, Poland, Rumania, USSR (Byelorussia, Estonia, Latvia, Lithuania, RSFSR, Ukraine), Sweden, Switzerland, UK (England, Channel Islands, Northern Ireland, Scotland, Wales), Yugoslavia. North America; USA (California, Illinois, Indiana, Iowa, Kansas, Kentucky, Missouri, Nebraska, New York, Ohio, Wisconsin, Virginia). TRANSMISSION: By spores ('conidia') dispersed by wind or rain-splash. The role of oospores (if they are usually formed) in disease transmission is unknown.

Peronospora potentillae. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
G. Hall
Keyword(s):  
British Columbia ◽  
North America ◽  
Downy Mildew ◽  
Geographical Distribution ◽  
Plant Pathogen ◽  
Disease Transmission ◽  
Washington State ◽  
Fragaria Vesca ◽  
Rain Splash

Abstract A description is provided for Peronospora potentillae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Potentilla argentea, P. aurea subsp. aurea, P. aurea subsp. chrysocraspeda (=P. ternata), P. crantzii, P. pabelliformis, P. gracilis subsp. nuttallii (=P. nuttallii), P. grandiflora, P. nepalensis, P. norvegica, P. norvegica var. hirsuta, P. pulcherrima, P. sterilis. Possibly Fragaria vesca and F. moschata, but see below. DISEASE: Downy mildew of Potentilla species; an obligately necrotrophic plant pathogen. GEOGRAPHICAL DISTRIBUTION: Asia; India, USSR (Uzbekistan). Europe; Czechoslovakia, Denmark, Eire, Finland, France, Germany, Italy, Norway, Poland, Rumania, Sweden, Switzerland, UK (England, Wales, Scotland), USSR (Latvia; RSFSR). North America; USA (Arkansas, Colorado, Idaho, Indiana, Iowa, Kansas, Michigan, New Jersey, Oregon, Texas, Washington State, Wisconsin, Wyoming), Canada (British Columbia, Saskatchewan) TRANSMISSION: By spores ('conidia') dispersed by wind or rain-splash. The role of oospores (if they are usually formed) in disease transmission is unknown.

Peronospora euphorbiae. [Descriptions of Fungi and Bacteria].

1994 ◽  
Author(s):  
G. Hall
Keyword(s):  
South Africa ◽  
North America ◽  
South Dakota ◽  
Downy Mildew ◽  
Geographical Distribution ◽  
Disease Transmission ◽  
Rain Splash

Abstract A description is provided for Peronospora euphorbiae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Euphorbia dulcis, E. paralias, E. peploides, E. peplus, E. platyphylla, E. prostrata, E. serpens, E. serpyllifolia, E. serratula (= E. stricta). DISEASE: Downy mildew of Euphorbia species. Leaf lesions are hypophyllous, but superficial in E. paralias, as it has stomata on the upper surface of its leaves, which curl upwards. GEOGRAPHICAL DISTRIBUTION: Africa: South Africa. Asia-Temperate: Japan. Europe: France, Italy, Majorca, Poland, Romania, Spain, Switzerland, UK (England). North America: USA (South Dakota, Texas). TRANSMISSION: By conidia which are dispersed by wind or rain-splash. The role of oospores in disease transmission is unknown, but they may serve as perennating structures.

Peronospora ficariae. [Descriptions of Fungi and Bacteria].

1994 ◽  
Author(s):  
G. Hall
Keyword(s):  
New York ◽  
New Zealand ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
Disease Transmission ◽  
Washington State ◽  
Rain Splash ◽  
Ficaria Verna

Abstract A description is provided for Peronospora ficariae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Anemone coronaria, Helleborus purpurascens, Ficaria calthifolia, F. ledebourii, F. ficarioides, Ranunculus abortivus, R. acriformis, R. acer, R. acris, R. alpestris, R. auricomus, R. bulbosus, R. carpaticus, R. cassubicus, R. constantinopolitanus, R. crenatus, R. fascicularis, R. ficaria (= Ficaria verna), R. flammula subsp. flammula, R. languinosus, R. lateriflorus, R. lingua, R. montanus, R. nemorosus, R. oreophilus, R. oxyspermus, R. pedatus, R. pennsylvanicus, R. platanifolius, R. polyanthemus, R. pseudoplatanus, R. recurvatus, R. repens, R. sardous, R. scleratus, R. septentrionalis, R. uncinatus (= R. bongardi), R. velutinus. DISEASE: Downy mildew of Ranunculus species, covering the entire leaf undersurface. GEOGRAPHICAL DISTRIBUTION: Asia-Temperate: China, Kazakhstan, Kirgizistan, Russia (Kamchatka), Stavropol, Japan. Australasia: New Zealand. Europe: Austria, Belgium, Belorussiya, Bulgaria, Czechoslovakia, Denmark, Eire, Estonia, Faeroes, Finland, France, Germany, Hungary, Iceland, Italy, Latvia, The Netherlands, Norway, Poland, Romania, Russia (Krym, Moscow, Pskov, Novgorod, St. Petersburg, Saratov, Smolensk, Tambov, Tatariya, Tula, Yaroslavl) Sweden, Switzerland, Ukraine, UK (England, Scotland, Wales, Channel Islands), Yugoslavia. North America; Canada (British Columbia, Que), USA (Alabama, Idaho, Maine, Michigan, Oregon, Wisconsin, Washington State, Wyoming, New York). South America: Argentina, Dominican Republic. TRANSMISSION: By conidia dispersed by wind or rain-splash. The role of oospores in disease transmission is unknown, although they may act as perennating structures.

Peronospora oerteliana. [Descriptions of Fungi and Bacteria].

1994 ◽  
Author(s):  
G. Hall
Keyword(s):  
Downy Mildew ◽  
Geographical Distribution ◽  
Disease Transmission ◽  
Rain Splash

Abstract A description is provided for Peronospora oerteliana. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Primula acaulis, P. algida, P. elatior, P. juliae, P. officinalis, P. veris, P. vulgaris. DISEASE: Downy mildew of Primula species. GEOGRAPHICAL DISTRIBUTION: Asia-Temperate: Kazakhstan. Europe: Czechoslovakia, Denmark, Eire, France, Germany, Poland, Romania, Sweden, Switzerland, Yugoslavia, UK (England, Scotland). TRANSMISSION: By conidia which are dispersed by wind or rain-splash. The role of oospores in disease transmission is unknown, but they may have a perennating function.

Peronospora chlorae. [Descriptions of Fungi and Bacteria].

1994 ◽  
Author(s):  
G. Hall
Keyword(s):  
The Netherlands ◽  
Downy Mildew ◽  
Geographical Distribution ◽  
Disease Transmission ◽  
Republic Of Georgia ◽  
Rain Splash

Abstract A description is provided for Peronospora chlorae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Blackstonia (=Chlora) imperfoliata, B. perfoliata, B. serotina, Centaurium pulchellum, Erythraea centaureum, E. roxburghii, Eustoma russelianum (=Lisianthus russelianus). DISEASE: Downy mildew of Blackstonia and Eustoma. GEOGRAPHICAL DISTRIBUTION: Asia-Temperate: Abkhasiya, Azerbaijan, Republic of Georgia. Asia-Tropical: India. Europe: Denmark, France, Hungary, Italy, The Netherlands, Portugal, Spain, Switzerland, Ukraine, UK (England, Guernsey, Jersey), Yugoslavia. TRANSMISSION: By conidia dispersed by wind or rain-splash. The role of oospores in disease transmission is unknown, but they may act as perennating structures.

Rhizina inflata. [Distribution map].

1993 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
New York ◽  
British Columbia ◽  
North America ◽  
Northern Ireland ◽  
New Brunswick ◽  
Geographical Distribution ◽  
Distribution Map ◽  
Irish Republic ◽  
New Distribution

Abstract A new distribution map is provided for Rhizina inflata[Rhizina undulata] Fr. Hosts: Coniferae. Information is given on the geographical distribution in Africa, South Africa, Swaziland, Zimbabwe, Asia, Japan, Korea, Europe, Belgium, Bulgaria, Czechoslovakia, Finland, France, Germany, Irish Republic, Netherlands, Norway, Poland, Portugal, Sweden, Russia, Latvia, Lithuania, UK, England, Scotland, Wales, Northern Ireland, North America, Canada, British Columbia, New Brunswick, Ontario, Saskatchewan, USA, California, Connecticut, Idaho, Maryland, Maine, Minnesota, Montana, New York, Oregon, Vermont, Washington, NW.

Leptosphaeria purpurea. [Descriptions of Fungi and Bacteria].

2002 ◽  
Author(s):  
Chi-yu Chen
Keyword(s):  
New York ◽  
Czech Republic ◽  
Great Britain ◽  
North America ◽  
Geographical Distribution ◽  
Slovak Republic ◽  
Host Tissue ◽  
Rain Splash

Abstract A description is provided for Leptosphaeria purpurea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Although the fungus appears on dry stems of its hosts, which are mainly herbaceous, it is not known to cause any pathological symptoms. HOSTS: Artemisia, Betonica, Carduus, Cirsium, Cnicus, Clinopodium, Helianthus, Satureja and Senecio. GEOGRAPHICAL DISTRIBUTION: NORTH AMERICA: Canada (Quebec, Ontario), USA (New York). ASIA: Pakistan. EUROPE: Austria, Belgium, Czech Republic, Germany, Great Britain, Hungary, Slovak Republic, Sweden. TRANSMISSION: Conidia and ascospores are dispersed by wind and rain-splash; the fungus presumably overwinters on dead host tissue and the ascospores are dispersed in the next favourable season.

Peronospora sparsa. [Descriptions of Fungi and Bacteria].

1981 ◽  
Author(s):  
S. M. Francis
Keyword(s):  
Downy Mildew ◽  
Geographical Distribution ◽  
Disease Transmission ◽  
Unknown Origin ◽  
Northern Europe ◽  
Flower Buds ◽  
Rosa Canina ◽  
Necrotic Spots ◽  
One Year

Abstract A description is provided for Peronospora sparsa. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cultivated roses and the following species, Rosa californica, R. centifolia, R. canina, R. chinensis, R. rubiginosa. DISEASE: Downy mildew of rose. Bright red to purple or, less frequently, brown spots develop on the leaves which fall very readily especially if the bushes are shaken gently. A non-parasitic defoliation of unknown origin termed a 'false mildew' has been reported from France (Tramier, 1962). The necrotic spots formed on the leaves are similar at a certain stage to those caused by P. sparsa. Conidiophores and conidia develop on the under surface of the downy mildew spots in high relative humidity. In Europe their production is sparse but in California it is reported as copious (Baker, 1953). In heavy infections stems and flowers (both calyx and petals) become diseased and badly infected and young stems often die back. Flowers and flower buds can be retarded and malformed by the pathogen without visible damage to the leaves (53, 3523). GEOGRAPHICAL DISTRIBUTION: Africa (Egypt, Morocco, S. Africa, Zimbabwe); Asia (Brunei, Iran, Israel, Japan, Mauritius, Philippines); Australasia (Australia, New Zealand); Europe (Austria, Britain (incl. Jersey), Bulgaria, Czechoslovakia, Estonia, France, Germany, Greece, Iceland, Italy, Latvia, Netherlands, Portugal, Poland, Romania, Sweden, Switzerland, Yugoslavia, USSR); N. America (Canada, USA); S. America (Argentina, Brazil). TRANSMISSION: As dormant mycelium in cuttings and plants. It is reported that mycelium can overwinter within infected stems both from warmer countries such as Australia (57, 2154) and Brazil (19, 98) and also from Northern Europe (53, 3523). The role of oospores in disease transmission is less certain. They have been found in leaves and stems (Baker, 1953; Fraymouth, 1956) and flowers (Cuboni, 1888) but their occurrence seems to be sporadic and they do not appear to be of great importance in carrying over the pathogen. The possibility that the disease may be seed borne was suggested by a worker in Poland (7, 325). In 1926 downy mildew was discovered in a commercial nursery near Lublin on one-year-old seedlings of Rosa canina. The seedlings had been raised from seed imported from Vienna and the inference was that the disease came with the seed especially as all seedlings of local origin were healthy. Peronospora sparsa is not listed as a seed pathogen by Neergaard (1977).

Sclerotinia narcissicola. [Distribution map].

1968 ◽  
Author(s):  
Keyword(s):  
United States ◽  
Great Britain ◽  
North America ◽  
Northern Ireland ◽  
Geographical Distribution ◽  
Channel Islands ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Sclerotinia narcissicola Greg. Hosts: Narcissus. Information is given on the geographical distribution in AUSTRALASIA, Australia (Victoria), Tasmania, EUROPE, Channel Islands (Jersey; Guernsey), Denmark, Germany, Great Britain and Northern Ireland, Ireland (Republic of), Netherlands,? Norway, NORTH AMERICA, Canada, United States.

Cladosporium phlei. [Descriptions of Fungi and Bacteria].

1988 ◽  
Author(s):  
J. C. David
Keyword(s):  
New York ◽  
New Zealand ◽  
North America ◽  
Northern Ireland ◽  
Geographical Distribution ◽  
West Germany ◽  
High Humidity ◽  
Cladosporium Phlei ◽  
Host Infection

Abstract A description is provided for Cladosporium phlei. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Phleumpratense (cf. notes). DISEASE: Eyespot of timothy. GEOGRAPHICAL DISTRIBUTION: Asia: Japan. Australasia: New Zealand. Europe: Denmark, Eire, England, Northern Ireland, Norway, Sweden, USSR (Byelorussia), West Germany. North America: Canada (Quebec), USA (New York, Oregon, Washington). TRANSMISSION: By airborne dispersal of conidia, and by conidia on seeds of the host. Infection requires a high humidity (80-100%) to be successful. Spores germinate at between 3 and 33°C, optimally at 24°C (55, 5249).

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