Ramularia trifolii. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
J. Ingham
Keyword(s):  
Geographical Distribution ◽  
Leaf Spot ◽  
Leaf Surface ◽  
Wind Dispersal

Abstract A description is provided for Ramularia trifolii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Trifolium rybergii. DISEASE: Leaf spot of T. rybergii. The lesions tend to be elongated, being restricted by larger veins, but several infections together can give the lesion a more irregular appearance. Small tufts of conidiophores can be seen on either leaf surface. Sporulation is known to occur in July. GEOGRAPHICAL DISTRIBUTION: Europe (Germany). TRANSMISSION: By wind dispersal of air-borne conidia.

Ramularia galegae. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
J. Ingham
Keyword(s):  
Geographical Distribution ◽  
Leaf Spot ◽  
Leaf Surface ◽  
Wind Dispersal ◽  
Galega Officinalis

Abstract A description is provided for Ramularia galegae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Galega officinalis: Goat's rue. DISEASE: Leaf spot of G. officinalis. Lesions tend to be elongated, being restricted by larger veins, but several infections together can give the lesions an irregular appearance. Small tufts of conidiophores can be seen on either leaf surface. Sporulation is known to occur in October. GEOGRAPHICAL DISTRIBUTION: Europe (France, Italy, Romania). TRANSMISSION: By wind dispersal of air-borne conidia.

Ramularia psoraleae. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
J. Ingham
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Leaf Surface ◽  
Wind Dispersal

Abstract A description is provided for Ramularia psoraleae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Psoralea machrostachya. DISEASE: Leaf spot of P. machrostachya. The lesions are mainly circular, sometimes merging to give an irregular appearance. Small tufts of white conidiophores can be seen on either leaf surface, but predominantly on the underside. Sporulation is known to occur in May. GEOGRAPHICAL DISTRIBUTION: North America (USA: California). TRANSMISSION: By wind dispersal of air-borne conidia.

Erwinia mallotivora. [Descriptions of Fungi and Bacteria].

1981 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
Geographical Distribution ◽  
Leaf Spot ◽  
Leaf Surface ◽  
Bacterial Leaf Spot ◽  
Secondary Spread ◽  
Shoot Blight ◽  
Mallotus Japonicus ◽  
Rain Splash

Abstract A description is provided for Erwinia mallotivora. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Mallotus japonicus (Euphorbiaceae). DISEASE: Bacterial leaf spot. The disease starts as water-soaked spots on the newly developing leaves in May and June. The spots tend to form close to the main veins. They enlarge and become angular as they are restricted by the veins, becoming dark brown, and often with a chlorotic halo about 1 mm wide. Spots may coalesce and kill the leaf, and shoot blight may also occur. Under humid conditions bacteria may exude on to the leaf surface. GEOGRAPHICAL DISTRIBUTION: Japan. TRANSMISSION: Unknown, but presumably rain splash plays a part at least in secondary spread.

Ramularia pratensis. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
S. Wilson
Keyword(s):  
Great Britain ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Channel Islands ◽  
Wind Dispersal ◽  
Rumex Acetosa

Abstract A description is provided for Ramularia pratensis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Rumex acetosa, R. aquaticus, R. acetosella, R. hydrolapathum, R. longifolius, R. obtusifolius, R. thyrsiflorus. DISEASE: Leaf spot of Rumex spp. Round or oval lesions, from (1-) 2 (-3) mm diam., with a distinct purple-brown border and buff centre. GEOGRAPHICAL DISTRIBUTION: Europe: Channel Islands, Eire, Great Britain, Germany, Hungary, Italy, Sweden. TRANSMISSION: Probably wind-dispersal by air-borne spores.

Cladosporium variabile. [Descriptions of Fungi and Bacteria].

1995 ◽  
Author(s):  
J. C. David
Keyword(s):  
Geographical Distribution ◽  
Leaf Spot ◽  
Spinacia Oleracea ◽  
Wind Dispersal ◽  
Airborne Conidia

Abstract A description is provided for Cladosporium variabile. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Spinacia oleracea. Reports of this species from other hosts, such as Impatiens and Brassica, generally refer to infections by Cladosporium macrocarpum Preuss. DISEASE: Leaf-spot of spinach. GEOGRAPHICAL DISTRIBUTION: Asia: China (Shaanxi, Xinjiang), India. N. America: USA (MA, VA). Europe: Austria, Belgium, Denmark, Germany, Italy, Romania, Spain, UK. TRANSMISSION: By wind dispersal of airborne conidia.

Pseudocercospora timorensis. [Descriptions of Fungi and Bacteria].

1987 ◽  
Author(s):  
S. Little
Keyword(s):  
Sweet Potato ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Ipomoea Batatas ◽  
Leaf Surface ◽  
Solomon Islands ◽  
Leaf Spots ◽  
Brown Leaf Spot ◽  
Water Splash ◽  
Brown Leaf

Abstract A description is provided for Pseudocercospora timorensis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Ipomoea batatas (sweet potato), I. biloba, I. campanulata, I. cordofana, I. muricata, I. peltata, I. setifera.DISEASE: Leaf spot or brown leaf spot of sweet potato. Small circular lesions first form on the leaf borders and tips before spreading over the leaf surface. These leaf spots enlarge becoming brown to dark brown in colour with a verruculose surface. The larger leaf veins may delimit the spots. GEOGRAPHICAL DISTRIBUTION: Africa: most countries; Asia: Hong-Kong, India, Indonesia, Malaysia, Taiwan; Australasia: Fiji, Papua New Guinea, Solomon Islands; North America: West Indies (St Lucia). TRANSMISSION: Presumably by wind-borne and water-splash dispersed conidia.

Alternaria cassiae. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
J. C. David
Keyword(s):  
South Africa ◽  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Wind Dispersal ◽  
Cassia Angustifolia ◽  
Airborne Conidia ◽  
Albizia Procera ◽  
Crotalaria Spectabilis

Abstract A description is provided for Alternaria cassiae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Albizia procera, Banhinia purpurea, Cassia angustifolia, C. corymbosa, C. fistula, C. glauca, C. holosericea, C. obtusifolia, C. occidentalis, C. sophora, Crotalaria spectabilis (68, 1563), Rhynchosia sp. DISEASE: Leaf spot of Cassia or sicklepod. The disease can also affect seedlings. GEOGRAPHICAL DISTRIBUTION: Africa: South Africa. North America: USA (Florida). Asia: India, Pakistan. TRANSMISSION: By wind dispersal of airborne conidia.

Cercospora parthenii. [Descriptions of Fungi and Bacteria].

2000 ◽  
Author(s):  
J. C. David
Keyword(s):  
South America ◽  
Dominican Republic ◽  
Central America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Parthenium Hysterophorus ◽  
Wind Dispersal ◽  
Airborne Conidia

Abstract A description is provided for Cercospora parthenii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot of parthenium. HOSTS: Parthenium hysterophorus (Compositae). GEOGRAPHICAL DISTRIBUTION: CENTRAL AMERICA: Cuba, Dominican Republic, Trinidad. SOUTH AMERICA: Venezuela. TRANSMISSION: By wind dispersal of airborne conidia.

Ramularia bistortae. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
S. Wilson
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Wind Dispersal ◽  
Brown Centre

Abstract A description is provided for Ramularia bistortae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Polygonum bistorta, P. viviparum. DISEASE: Leaf spot of P. bistorta. Lesions on both sides, irregular, often angular or circular, dark purple-brown margin with light brown centre, size varies from 1-8 mm (usually 4-5 mm) diam., sporulation occurs on both sides of leaf. GEOGRAPHICAL DISTRIBUTION: Europe: Austria, England, Germany, Italy, Romania; North America: USA (Wyoming). TRANSMISSION: Not known, probably wind dispersal by air-borne spores.

Alternaria limicola. [Descriptions of Fungi and Bacteria].

1995 ◽  
Author(s):  
J. C. David
Keyword(s):  
Geographical Distribution ◽  
Leaf Spot ◽  
Wind Dispersal ◽  
Citrus Aurantifolia ◽  
Citrus Leaf ◽  
Airborne Conidia

Abstract A description is provided for Alternaria limicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Citrus aurantifolia. DISEASE: Citrus leaf spot. GEOGRAPHICAL DISTRIBUTION: N. America: Mexico. TRANSMISSION: By wind dispersal of airborne conidia.

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