Phaeoisariopsis robiniae. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
P. M. Kirk
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Robinia Pseudoacacia ◽  
Tree Disease ◽  
Survival Mechanisms

Abstract A description is provided for Phaeoisariopsis robiniae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Robinia pseudoacacia (Locust tree). DISEASE: Leaf spot, the effected leaves soon turning yellow and falling. GEOGRAPHICAL DISTRIBUTION: North America (U.S.A. (VA, IA, WI)). TRANSMISSION: Presumably by air borne conidia. Survival mechanisms unknown.

Phaeoisariopsis simulata. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
P. M. Kirk
Keyword(s):  
Puerto Rico ◽  
North America ◽  
South America ◽  
Central America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
Survival Mechanisms

Abstract A description is provided for Phaeoisariopsis simulata. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Species of Cassia including C. marylandica (American senna). DISEASE: Leaf spot. GEOGRAPHICAL DISTRIBUTION: Africa (Tanzania), North America (U.S.A. (IL, KS, MA, AR)), Central America & West Indies (Puerto Rico), South America (Venezuela). TRANSMISSION: Presumably by air borne conidia. Survival mechanisms unknown.

Pyrenophora erythrospila. [Descriptions of Fungi and Bacteria].

1990 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
New Zealand ◽  
North America ◽  
Geographical Distribution ◽  
Leaf Spot

Abstract A description is provided for Pyrenophora erythrospila. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Agrostis, Hordeum and Triticum. DISEASE: Leaf spot of bent grass and red top. GEOGRAPHICAL DISTRIBUTION: Australia, Europe, New Zealand, North America. TRANSMISSION: By wind-borne conidia.

Entyloma serotinum. [Descriptions of Fungi and Bacteria].

1988 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
New Zealand ◽  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Infected Plant ◽  
Growing Season ◽  
Republic Of Georgia ◽  
Borago Officinalis ◽  
Plant Remains ◽  
Water Splash

Abstract A description is provided for Entyloma serotinum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Symphytum spp., including S. asperrimum, S. bulbosum, S. cordatum, S. officinale, S. ottomanum and S. tuberosum; Borago officinalis; also recorded on Amsinckia, Lappula and Mertensia spp. (in USA) and Pulmonaria (in Europe, but see 64, 4163). DISEASE: Leaf spot of Symphylum, less frequently (though with similar symptoms) of other members of the Boraginaceae.GEOGRAPHICAL DISTRIBUTION: Africa: Algeria. Asia: Israel, USSR (Republic of Georgia). Australasia: New Zealand. Europe: widespread, including Austria, British Isles, Czechoslovakia, Denmark, France (including Corsica), Germany, Hungary, Italy, Netherlands, Poland, Portugal, Romania, Spain, Switzerland, USSR (Latvia), Yugoslavia. North America: USA. TRANSMISSION: Ustilospores survive on infected plant remains and in soil, and germinate to infect seedlings and the new seasons's leaves. In Europe conidia may also over-winter and initiate new infections in spring (Kaiser, 1936). During the growing season, conidia are disseminated by air currents and water-splash.

Mycosphaerella populorum. [Descriptions of Fungi and Bacteria].

1990 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
North America ◽  
South America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Leaf Spot Disease ◽  
Distribution Map ◽  
Spot Disease ◽  
Mycosphaerella Populorum

Abstract A description is provided for Mycosphaerella populorum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Populus spp. DISEASE: Septoria canker, leaf spot disease. GEOGRAPHICAL DISTRIBUTION: North America: USA (east and central states). South America: Argentina (CMI Distribution Map 540, 1981). TRANSMISSION: By windborne conidia and ascospores.

Xanthomonas fragariae. [Descriptions of Fungi and Bacteria].

2000 ◽  
Author(s):  
G. S. Saddler
Keyword(s):  
North America ◽  
Leaf Litter ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
South Australia ◽  
Sprinkler Irrigation ◽  
Night Time ◽  
South Wales ◽  
Xanthomonas Fragariae ◽  
Rain Splash

Abstract A description is provided for Xanthomonas fragariae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Fragaria × ananassa (Rosaceae); by artificial inoculation: Fragaria virginiana, F. vesca, Potentilla fruticosa and P. glandulosa (Rosaceae). DISEASE: Angular leaf spot and vascular decline or collapse of strawberry. First described in 1962 in North America. The leaf spot phase appears as minute water-soaked spots on the underside of leaves surrounded by the smallest veins. In the early stages symptoms are only visible on the leaf underside. Spots enlarge, coalesce, penetrate to the upper leaf surface and darken, turning into large, irregular necrotic areas. They have a shiny appearance and are usually covered by bacterial exudate which, when dry, turns brown and appears as gum-like scales. Spots coalesce more frequently along the primary and secondary veins. The dead tissues tear and break off, and the diseased leaf may assume a ragged appearance. Heavy losses may occur with frequent overhead sprinkler irrigation. The conditions favouring infection are moderate to cool daytime temperatures (about 20°C), low night-time temperatures and high humidities (MAAS, 1998). In addition, blossom blight of strawberry has been found in California and is caused by a complex of X. fragariae and Cladosporium cladosporioides (GUBLER et al., 1999). GEOGRAPHICAL DISTRIBUTION: AFRICA: Ethiopia, Réunion. NORTH AMERICA: Canada (New Brunswick, Newfoundland, Nova Scotia, Ontario, Quebec), USA (California, Florida, Kentucky, Minnesota, North Carolina, Wisconsin). SOUTH AMERICA: Argentina, Brazil (Minas Gerais, Rio Grande do Sul, Sao Paulo), Chile, Ecuador, Paraguay, Uruguay, Venezuela. ASIA: Taiwan, Israel. AUSTRALASIA: Australia (New South Wales, South Australia, Victoria), New Zealand. EUROPE: Belgium, France, Germany, Greece, Italy (Sicily), Netherlands, Portugal, Romania, Spain, Switzerland, Ukraine. TRANSMISSION: Rain splash from infested leaf litter in the soil on to young healthy leaves. Penetration occurs through the stomata. Infections of the crowns occur through local wounds or downwards from affected leaves. Bacteria can overwinter in leaf litter and for many years in dried leaf material. Residues of infected leaves and crown infections on runners used for planting are sources of inoculum for primary infections.

Entyloma ficariae. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Small Area ◽  
Infected Plant ◽  
Growing Season ◽  
Plant Remains

Abstract A description is provided for Entyloma ficariae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Ranunculus ficaria and other species of Ranunculus; R. acris, R. auricomus, R. bongardii, R. cassubicus, R. eremogenes, R. macounii, R. montanus, R. multifidus, R. nemorosus, R. occidentalis, R. oreophilus, R. pennsylvanicus, R. polyanthemos, R. repens, R. sardous, R. scleratus, R. septentrionalis; there are occasional records for other Ranunculaceae (Anemone, Thalictrum). DISEASE: Leaf spot or white smut of Ranunculus species. Infected plants often show slightly smaller leaves and fewer flowers than uninfected. Although the smut is not systemic, it is common for almost every leaf of a plant to develop spots and for disease to persist within a small area year after year. GEOGRAPHICAL DISTRIBUTION: Widely distributed in north temperate regions. Asia: Japan, Turkey, USSR; Europe: Austria, Belgium, Czechoslovakia, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, UK, USSR; North America: Canada, USA (33: 450 & 634; Vanky, 1985). TRANSMISSION: Ustilospores survive in infected plant remains in soil and germinate, chiefly in spring, to infect the new seasons leaves. Conidia are disseminated by wind and rain and contribute to the spread of disease throughout the growing season.

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.

Mycosphaerella aleuritis. [Descriptions of Fungi and Bacteria].

1990 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
Hong Kong ◽  
North America ◽  
South America ◽  
Central America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Central African Republic ◽  
Angular Leaf Spot ◽  
Distribution Map ◽  
Rain Splash

Abstract A description is provided for Mycosphaerella aleuritis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Aleurites fordii, A. mollucana, A. montana. DISEASE: Angular leaf spot of tung. GEOGRAPHICAL DISTRIBUTION: Africa: Central African Republic, Malagasy Republic, Malawi, Zaire (probably also Cameroon, Chad, Congo, Gabon). Asia: China, Hong Kong, Japan, Korea, Malaysia, Taiwan. Central America & Caribbean: Cuba, Trinidad. North America: USA. South America: Argentina, Brazil, Paraguay? (CMI Distribution Map 278, ed. 3, 1975). TRANSMISSION: By ascospores and conidia, which are mainly dispersed by rain-splash and wind (45, 1989f).

Septoria cannabis. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Crop Residues ◽  
New Records ◽  
Cannabis Sativa ◽  
Leaf Blight ◽  
White Leaf ◽  
Rain Splash

Abstract A description is provided for Septoria cannabis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Cannabis sativa (hemp). DISEASE: White leaf spot or leaf blight of hemp. Symptoms usually appear on basal leaves as round or ellipsoidal to polygonal, whitish or ochraceous yellow lesions with a conspicuous dark brown border. Affected leaves become curled and withered up towards the edges and fall prematurely leaving much of the lower part of the stem defoliated (15, 97, 805). GEOGRAPHICAL DISTRIBUTION: Asia, Europe and North America (CMI Map No. 477, ed. 1, 1971). New records not mapped are: Asia (Kashmir, Pakistan). TRANSMISSION: Detailed studies have not been reported but conidia are presumed to be disseminated by rain-splash and wind blown water. The fungus could also be carried over in crop residues.

Septoria geranii. [Descriptions of Fungi and Bacteria].

2004 ◽  
Author(s):  
T. V. Andrianova
Keyword(s):  
Great Britain ◽  
North America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Republic Of Georgia ◽  
Necrotic Spots

Abstract A description is provided for Septoria geranii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot; necrotic spots, leading to leaf drying. HOSTS: Geranium carolinianum, G. collinum, G. columbinum, G. depilatum, G. dissectum, G. divaricatum, G. graveolens, G. lucidum, G. molle, G. nodosum, G. palustre, G. pratense, G. purpureum, G. pusillum, G. pyrenaicum, G. rectum, G. robertianum, G. sanguineum, G. sylvaticum, G. versicolor (Geraniaceae). GEOGRAPHICAL DISTRIBUTION: AFRICA: Canary Is, Kenya. NORTH AMERICA: USA. ASIA: Azerbaijan, Republic of Georgia [www.cybertruffle.org.uk/gruzmaps/index.htm], India, Kazakhstan, Kirgizstan, Russia, Turkmenistan, Uzbekistan. EUROPE: Belarus, Bulgaria, Estonia, France, Germany, Great Britain, Greece, Hungary, Italy, Lithuania, Norway, Poland, Portugal, Romania, Russia, Spain. TRANSMISSION: Not reported, but almost certainly by airborne or splash-dispersed conidia.

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