Pythium tracheiphilum. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
G. Hall
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Plant Pathogen ◽  
Mycelial Growth ◽  
Stem Rot ◽  
Moist Soil ◽  
Vascular Wilt ◽  
Severe Stunting ◽  
Spinacea Oleracea ◽  
Resting Spores

Abstract A description is provided for Pythium tracheiphilum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lactuca saliva, Spinacea oleracea. DISEASE: Vascular wilt and stem rot of lettuce; a facultatively necrotrophic plant pathogen. Symptoms are severe stunting and wilting of young or maturing plants, vascular browning and necrotic leaf lesions, which may be large or small and restricted (58, 2495). GEOGRAPHICAL DISTRIBUTION: Europe; Germany, Italy, Netherlands, Sweden, UK (England). North America: USA (WI). TRANSMISSION: Presumably by zoospores in moist soil and by rapid mycelial growth. Oospores and resting spores probably act as perennating structures.

Cladosporium variabile. [Distribution map].

1996 ◽  
Author(s):  
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Former Yugoslavia ◽  
Distribution Map ◽  
Spinacea Oleracea ◽  
De Vries ◽  
New Distribution

Abstract A new distribution map is provided for Cladosporium variabile (Cooke) G.A. de Vries. Hosts: spinach (Spinacea oleracea). Information is given on the geographical distribution in AFRICA, Morocco, ASIA, China, Shaanxi, Xinjiang, India, Rajasthan, Jammu & Kashmir, Iran, Iraq, Korea, Pakistan, Turkey, EUROPE, Austria, Belgium, Bulgaria, Cyprus, Denmark, France, Germany, Greece, Hungary, Italy, Sardinia, Netherlands, Romania, Spain, UK, England, Wales, Scotland, former Yugoslavia Montenegro, NORTH AMERICA, Canada, USA.

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.

Herpotrichia coulteri. [Descriptions of Fungi and Bacteria].

1972 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Mycelial Growth

Abstract A description is provided for Herpotrichia coulteri. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Pinus spp., P. albicaulis, P. contorta, P. engelmannii, P. mugo var.pumilio, P. murrayana and P. nigra var. amasia. DISEASE: Brown felt-blight of pine. GEOGRAPHICAL DISTRIBUTION: North America and Europe (Cyprus, Poland, Rumania, Switzerland). TRANSMISSION: By air-borne ascospores, mycelial growth from adjacent infected leaves.

Phytophthora clandestina. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
G. Hall
Keyword(s):  
Geographical Distribution ◽  
Plant Pathogen ◽  
Root Rot ◽  
Dry Matter ◽  
Subterranean Clover ◽  
Soil Surface ◽  
Trifolium Subterraneum ◽  
Moist Soil

Abstract A description is provided for Phytophthora clandestina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Trifolium subterraneum. DISEASE: Root rot of subterranean clover; a facultatively necrotrophic plant pathogen. In field plants, black necrotic lesions develop 1-4 cm below the soil surface extending into the stele and causing orange-brown to brown tissue discoloration. Dry matter can be reduced by 71% (69, 5030). GEOGRAPHICAL DISTRIBUTION: Australasia & Oceania; Australia (NSW, WA, Vic.) TRANSMISSION: Presumably by zoospores released in moist soil. Oospores may act as perennating structures.

Synchytrium macrosporum. [Descriptions of Fungi and Bacteria].

1983 ◽  
Author(s):  
J. C. Walker
Keyword(s):  
North America ◽  
Vicia Faba ◽  
Geographical Distribution ◽  
Xanthium Strumarium ◽  
Vigna Sinensis ◽  
Water Films ◽  
Torilis Japonica ◽  
Resting Spores ◽  
Ammi Majus ◽  
Local Dispersal

Abstract A description is provided for Synchytrium macrosporum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Karling (1964) lists the following hosts: Amaranthus berlandia, Ambrosia aptera, A. psilostachya, A. trifida, Ammi majus, Croton monanthogynus, Erigeron canadensis, Helenium tenuifolium, Iva ciliata, Modiola caroliniana, Nandina dornestica, Oenothera laciniata, Parthenium hysterophorus, Phyla incisa, Ratibida pinata, Riccinus communis, Rubus trivialis, Solanum elaegnifolium, Specularia perfoliata, Torilis japonica, Vicia faba, Vigna sinensis, Xanthium strumarium. However, experimentally infected hosts total over 1483 species in more than 933 genera of 185 families (57, 2425). DISEASE: Lavender-red galls develop on the leaves and stems of hosts. GEOGRAPHICAL DISTRIBUTION: North America (Texas). TRANSMISSION: No reports, but presumably by dissemination of resting spores, with local dispersal by zoospores swimming in water films.

Fusarium oxysporum f. sp. apii. [Descriptions of Fungi and Bacteria].

1996 ◽  
Author(s):  
D. Brayford
Keyword(s):  
North America ◽  
Pisum Sativum ◽  
Fusarium Oxysporum ◽  
Geographical Distribution ◽  
Solanum Melongena ◽  
Apium Graveolens ◽  
Gossypium Arboreum ◽  
Vascular Wilt ◽  
Race 1 ◽  
Symptomless Infection

Abstract A description is provided for Fusarium oxysporum f. sp. apii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Apium graveolens var. dulce (celery), A. graveolens var. rapaceum (celeriac). Symptomless infection of other crop plants and weeds may occur (66, 4005). Race 1 was reported to produce root lesions on inoculated Asparagus seedlings (68, 2953). The fungus can also cause vascular wilt of Mexican sunflower (Tithonia rotundifolia 'Torch') (Armstrong & Armstrong, 1966), peas (Pisum sativum) (Armstrong & Armstrong, 1967), Asparagus, Aubergine/Eggplant (Solanum melongena) and cotton (Gossypium arboreum 'Rozi', G. barbadense 'Coastland', 'Sakel') (Armstrong & Armstrong, 1969). DISEASE: Fusarium yellows. GEOGRAPHICAL DISTRIBUTION: Asia: Taiwan; Europe: France; North America: Canada (British Columbia, Ont), USA (widespread).

Pythium erinaceum. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
G. Hall
Keyword(s):  
Triticum Aestivum ◽  
New Zealand ◽  
Geographical Distribution ◽  
Plant Pathogen ◽  
Root Rot ◽  
Moist Soil

Abstract A description is provided for Pythium erinaceum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lupinus sp., Triticum aestivum. DISEASE: Possibly associated with a root rot complex of wheat; a facultatively necrotrophic plant pathogen. GEOGRAPHICAL DISTRIBUTION: Australasia & Oceania; Australia (NSW), New Zealand. TRANSMISSION: Presumably by zoospores in moist soil. Oospores may act as perennating structures.

Pythium tracheiphilum. [Distribution map].

1991 ◽  
Author(s):  
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Lactuca Sativa ◽  
Distribution Map ◽  
Spinacea Oleracea ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Pythium tracheiphilum Matta. Hosts: Lactuca sativa, Spinacea oleracea. Information is given on the geographical distribution in EUROPE, France, Germany, Italy, Netherlands, Sweden, UK, England, NORTH AMERICA, USA.

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.

Phytophthora pseudotsugae. [Descriptions of Fungi and Bacteria].

1989 ◽  
Author(s):  
G. Hall
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Pseudotsuga Menziesii ◽  
Plant Pathogen ◽  
Root Rot ◽  
Douglas Fir ◽  
Plant Diseases ◽  
Distribution Maps

Abstract A description is provided for Phytophthora pseudotsugae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pseudotsuga menziesii. DISEASE: Root rot of Douglas fir; the fungus is a facultatively necrotrophic plant pathogen. GEOGRAPHICAL DISTRIBUTION: North America: USA (OR, WA). See CMI Distribution Maps of Plant Diseases 600. TRANSMISSION: Unknown. Presumably soil-borne by zoopores released in favourable conditions.

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