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.

Xanthomonas fragariae. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
New Zealand ◽  
Leaf Litter ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Vascular Tissue ◽  
Systemic Infection ◽  
Limiting Factor ◽  
New Variety ◽  
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: On Fragaria vesca, its crosses and cultivars. DISEASE: Angular leaf spot and vascular decline or collapse of strawberry. The leaf spot phase appears as minute water-soaked spots on the underside of leaves. They enlarge, coalesce, penetrate to the upper leaf surface and darken in colour, turning into large, irregular necrotic areas. Infection may closely follow the veins of leaves, especially when petioles are inoculated, but was not found within the vascular tissue under the conditions prevailing in Minnesota (Kennedy & King, 1962a). Dye & Wilkie (1973) reported that under New Zealand conditions stems, petioles, flowers and fruits are not infected. Systemic invasion has occurred in California (47, 862), probably under damp nursery conditions. The crowns become infected and vascular decline or complete collapse results. Most bacteria occur intercellularly in vascular tissue, forming pockets in the xylem and cambium that often rupture the tissues of the crown. Occasionally bacteria are found within the vessels of the xylem. GEOGRAPHICAL DISTRIBUTION: USA, Venezuela, Sicily, Australia, New Zealand (CMI Map 520, ed. 1, 1977). TRANSMISSION: Presumably by rain splash from infested leaf litter in the soil on to young healthy leaves. Wounds are not necessary for entry (Dye & Wilkie, 1973). The bacteria can survive the winter in leaf litter in the soil (41, 730) and for many years in dried leaf material, but do not live free in the soil. When systemic infection is present the bacteria are easily transmitted in planting material, which probably accounts for the widespread, extremely sporadic distribution. Determination of the presence of systemic infection can be very difficult which makes this phase of the disease particularly dangerous; it may well be a limiting factor in the establishment of a new variety (47, 862).

Tilletia contraversa. [Distribution map].

1992 ◽  
Author(s):  
Keyword(s):  
New York ◽  
British Columbia ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
New South ◽  
South Australia ◽  
Distribution Map ◽  
South Wales ◽  
New Distribution

Abstract A new distribution map is provided for Tilletia contraversa Kuhn. Hosts: Wheat (Triticum), barley (Hordeum) and other Poaceae. Information is given on the geographical distribution in Africa, Algeria, Libya, Morocco, Tunisia, Asia, Afghanistan, Iran, Iraq, Japan, Russia, Azerbaijan, Alma-ata, Armenia, Transcaucasia, Turkmenistan, Kirghizia, Georgia, Kazakhstan, Tadshikistan, Turkmenia, Uzbekistan, Siberia, Stavropol, Moldavia, Crimea, Rostov, Voronezh, Syria, Turkey, Australasia & Oceania, Australia, New South Wales, South Australia, Victoria, Europe, Albania, Austria, Bulgaria, Czechoslovakia, Denmark, France, Germany, Greece, Hungary, Italy, Poland, Romania, Spain, Sweden, Switzerland, Yugoslavia, North America, Canada, British Columbia, Ontario, USA, Colorado, Idaho, Montana, New York, Oregon, Utah, Washington, Wyoming, NW states, California, Idaho, Indiana, Montana, New York, Oregon, Utah, South America, Argentina, Uruguay.

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.

Entyloma calendulae. [Descriptions of Fungi and Bacteria].

1984 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
New Zealand ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
New South ◽  
Infected Plant ◽  
South Wales ◽  
Plant Remains ◽  
New Crop

Abstract A description is provided for Entyloma calendulae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Calendula officinarum, also C. aegyptiaca, C. algeriensis, C. arvensis, C. persica. DISEASE: Leaf spot of Calendula. GEOGRAPHICAL DISTRIBUTION: Widely distributed in Europe including Scandinavia and USSR (Latvia); around the Mediterranean (Algeria, Israel, Tunisia, Turkey); North America (USA), South America (Argentina, Chile, Uruguay); Australia (New South Wales, Western Australia), New Zealand. TRANSMISSION: Ustilospores survive on infected plant remains in soil and germinate to infect the new crop. Overwintering on self-sown seedlings is also possible.

Pseudocercospora kaki. [Descriptions of Fungi and Bacteria].

2000 ◽  
Author(s):  
J. C. David
Keyword(s):  
Hong Kong ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Minas Gerais ◽  
Republic Of Georgia ◽  
Rain Splash

Abstract A description is provided for Pseudocercospora kaki. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot of persimmon. HOSTS: Diospyros hispida, D. kaki, D. lotus, D. texana, D. tupru (Ebenaceae). GEOGRAPHICAL DISTRIBUTION: NORTH AMERICA: USA (Louisiana), Bermuda. SOUTH AMERICA: Brazil (São Paolo, Minas Gerais). ASIA: China (Hong Kong, other provinces also, see GUO & HSIEH, 1995), Republic of Georgia (BRAUN & MEL'NIK, 1997), India, Iran (56: 5475), Japan, Nepal, Taiwan. EUROPE: Russia (BRAUN & MEL'NIK, 1997). TRANSMISSION: Conidia are dispersed by rain splash (ZHU et al., 1996).

Geoglossum umbratile. [Descriptions of Fungi and Bacteria].

2015 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Czech Republic ◽  
New Zealand ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
Canary Islands ◽  
New South ◽  
Conservation Status ◽  
South Australia ◽  
South Wales

Abstract A description is provided for Geoglossum umbratile. Some information on its associated organisms and substrata, habitats, dispersal and transmission and conservation status is given, along with details of its geographical distribution (North America (Canada and USA (Michigan)), South America (Chile), Asia (China (Hainan and Sichuan), India (Uttarakhand), Pakistan and Taiwan), Atlantic Ocean (Spain (Canary Islands)), Australasia (Australia (New South Wales South Australia Tasmania and Victoria) and New Zealand), Europe (Austria, Belgium, Bulgaria, Czech Republic, Denmark, Estonia, Finland, France, Germany, Irish Republic, Italy, Lithuania, Montenegro, Netherlands, Norway, Poland, Russia, Slovakia, Sweden, Switzerland and UK)). No reports of negative economic impacts of this fungus have been found.

Cercospora carbonacea. [Descriptions of Fungi and Bacteria].

1987 ◽  
Author(s):  
S. Little
Keyword(s):  
Puerto Rico ◽  
North America ◽  
South America ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
Lower Surface ◽  
Leaf Spots ◽  
Rain Splash

Abstract A description is provided for Cercospora carbonacea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Dioscoria spp. DISEASE: Leaf spot of yams. Causes fairly large, 5-20 mm, angular leaf spots, which are usually delimited by the leaf veins. The dark brown to almost black leaf spots give an almost charred appearance to the leaves, while on the lower surface the spots are grey becoming brown with age. GEOGRAPHICAL DISTRIBUTION: Africa: Ethiopia, Ghana, Guinea, Nigeria, Sierra Leone, Tanzania, Togo, Asia: Burma, India, North America: Canada (Ontario), West Indies (Barbados, Grenada, Jamaica, St. Vincent, Puerto Rico, Trinidad); South America: Venezuela. TRANSMISSION: Presumably by wind-borne and rain-splash dispersed conidia, surviving adverse periods in crop debris.

Gloeotinia granigena. [Distribution map].

1989 ◽  
Author(s):  
Keyword(s):  
New Zealand ◽  
North America ◽  
Federal Republic ◽  
Geographical Distribution ◽  
New South ◽  
South Australia ◽  
German Federal Republic ◽  
Distribution Map ◽  
South Wales ◽  
New Distribution

Abstract A new distribution map is provided for Gloeotinia granigena (Quélet) Schumacher. Hosts: Lolium spp. and other Gramineae. Information is given on the geographical distribution in Australasia, Australia, New South Wales, South Australia, Tasmania, Victoria, New Zealand, Europe, Denmark, France, German Federal Republic, Irish Republic, Netherlands, Sweden, UK, USSR, North America, Canada, Quebec, USA, Oregon.

Sign in / Sign up

Export Citation Format

Share Document