Ramulispora sorghi. [Descriptions of Fungi and Bacteria].

1978 ◽  
Author(s):  
K. H. Anahosur
Keyword(s):  
South America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Primary Infection ◽  
Leaf Blight ◽  
Disease Spread ◽  
Leaf Stripe ◽  
Infection Disease

Abstract A description is provided for Ramulispora sorghi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Sorghum almum, S. bicolor, S. caffrorum, S. halepense, S. purpureosericeum, S. saccharatum, S. sudanense, S. vulgare. DISEASE: Leaf spot, leaf stripe or sooty stripe. Elongated, elliptical or spindle shaped spots 5-14 × 1-2 cm with straw coloured necrotic centres and reddish-purple or tan borders appear on leaves and leaf sheaths. Spots coalesce to cause a leaf blight. Black sclerotia, which can be brushed off easily, are abundant on necrotic areas (Tarr, 1962). GEOGRAPHICAL DISTRIBUTION: Africa (W. Africa, Ethiopia, Rhodesia, Sudan, Tanzania, Uganda, Zambia); Asia (China, India, Pakistan); Australia (Queensland); South America (Argentina); USA (Alabama, Nebraska, Texas). TRANSMISSION: Sclerotia and sporodochia on crop debris produce conidia in damp weather thus acting as sources of primary infection. Disease spread is favoured by wind and rain under warm and moist conditions which favour sporulation (Tarr, 1962). Sclerotia and sporodochia remain viable up to 2 years (Rawla et al., 1974). The fungus is also transmitted through seeds (21, 286; 47, 807).

Phomopsis obscurans. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
B. C. Sutton
Keyword(s):  
New Zealand ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Primary Infection ◽  
Central Portion ◽  
Leaf Scorch ◽  
Fragaria Chiloensis ◽  
Mycosphaerella Fragariae

Abstract A description is provided for Phomopsis obscurans. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Fragaria chiloensis, Fragaria chiloensis var. ananassa, F. vesca, F. virginiana. DISEASE: Leaf blight of strawberry. Forming reddish-purple, almost circular lesions on older leaves and calyces which become elliptical or V-shaped when formed along veins, with the central portion drying out and turning brown. Delayed development of symptoms may lead to difficulties in distinguishing lesions in the field from those of leaf spot (Mycosphaerella fragariae (Tul.) Lind.) and leaf scorch (Diplocarpon earliana (Ellis & Everh.) Wolf). GEOGRAPHICAL DISTRIBUTION: Africa (Malawi, Mauritius, Rhodesia, Tanzania, Zambia); Asia (India, Nepal, Pakistan, U.S.S.R.); Australasia & Oceania (Australia, New Zealand, Tonga); North America (Canada, U.S.A.); South America (Argentina). TRANSMISSION: The pathogen overwinters as viable pycnidia in lesions on the old leaves which remain attached to the plant. Primary infection may occur early in the season by rain-splashed conidia.

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.

Leptosphaeria protearum. [Descriptions of Fungi and Bacteria].

1998 ◽  
Author(s):  
J. E. Taylor
Keyword(s):  
South Africa ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Leaf Blight

Abstract A description is provided for Leptosphaeria protearum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Protea caffra, P. cynaraides, P. compacta, P. gaguedi, P. grandiceps, P. lacticolor, P. lepidocarpodendron, P. lorifolia, P. magnifica, P. punctata, P. repens, Protea spp. DISEASE: Leaf spot often resembling a leaf blight. GEOGRAPHICAL DISTRIBUTION: South Africa, Zimbabwe, Hawaii. TRANSMISSION: Propagules are probably wind and splash dispersed.

Diaporthe manihotis. [Descriptions of Fungi and Bacteria].

1982 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
South America ◽  
Central America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Manihot Esculenta ◽  
West Indies ◽  
Severe Attack ◽  
Early Stages ◽  
Young Leaves ◽  
Pale Green

Abstract A description is provided for Diaporthe manihotis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Manihot esculenta. DISEASE: Leaf spot of cassava (46, 64) or sometimes referred to as Phomopsis blight of tapioca (54, 2588). In the early stages of infection the visible symptoms are pale green, watersoaked, small round spots on young leaves and petioles which rapidly enlarge and turn brown. Severe attack leads to defoliation and infection spreading to the stem. Affected areas become shrivelled with numerous pycnidia embedded in the tissue. On severely infected stems the bark starts to peel off gradually leading to partial or total girdling. GEOGRAPHICAL DISTRIBUTION: Africa (Ethiopia, Nigeria); Asia (India); Central America and West Indies (S.E. Dominica); South America (Colombia). TRANSMISSION: Probably by watersplash-dispersed conidia.

Passalora bupleuri. [Descriptions of Fungi and Bacteria].

2014 ◽  
Author(s):  
T. V. Andrianova
Keyword(s):  
South America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Bengal ◽  
Conservation Status ◽  
Voronezh Oblast ◽  
Belgorod Oblast ◽  
Tver Oblast ◽  
Stavropol Krai

Abstract A description is provided for Passalora bupleuri, a colonizer of living leaves, causing mild leaf spot symptoms and further leaf fading and drying, probably hastening leaf death. Some information on its habitat, dispersal and transmission, and conservation status is given, along with details of its geographical distribution (South America (Chile), Asia (Armenia, Azerbaijan, Georgia, India (Orissa and West Bengal), Kazakhstan, Kyrgyzstan, Russia (Kamchatka oblast, Primorye krai) and Uzbekistan), Caribbean (Cuba) and Europe (Bulgaria, Estonia, Germany, Italy, Latvia, Lithuania, Poland, Romania, Russia (Belgorod oblast, Kabardino-Balkaria Republic, Leningradskaya oblast, Lipetsk oblast, Stavropol krai, Tver oblast, Voronezh oblast), Slovakia, Spain and Ukraine)) and hosts (including Bupleurum tenuissimum).

Cercospora pappaea. [Descriptions of Fungi and Bacteria].

1987 ◽  
Author(s):  
S. Little
Keyword(s):  
South America ◽  
Papua New Guinea ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
New Guinea ◽  
Leaf Spots ◽  
Fruit Decay

Abstract A description is provided for Cercospora pappaea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Caricapappaea (pawpaw). DISEASE: Leaf spot of pawpaw. Leaf spots are circular at first, but become irregular with age, 3-10 mm diam., pale brown on the upper surface, indistinct on the lower. The fungus may also cause small shallow black dots on the fruit; these lesions may enlarge up to 3 mm, but do not cause fruit decay (Weber 1973). GEOGRAPHICAL DISTRIBUTION: Africa: Mauritius, Malawi, Sudan Uganda, Asia: Burma, India Indonesia, Nepal; Australasia and Oceania: Papua New Guinea, Tonga; South America: Venezuela.

Phyllachora dalbergiae. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
Growth Rate ◽  
South America ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Host Genus ◽  
Wind Currents

Abstract A description is provided for Phyllachora dalbergiae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Known from Dalbergia ferruginea, D. latifolia, D. nitidula, D. sissoo, D. stipulacea and D. variabilis. DISEASE: Causes a leaf spot of Dalbergia species. No research into the epidemiology or virulence of this disease has been carried out, but as the host genus is prominent and widespread it seems unlikely that serious damage is caused. In cases where the fungus is well established on the host, however, significant retardation of the growth rate must result. GEOGRAPHICAL DISTRIBUTION: Africa: Tanzania, Zimbabwe. Asia: Burma, India, Philippines. South America: Brazil. TRANSMISSION: This has not been studied, but it almost certainly occurs through the air-borne dispersal of ascospores in wind currents, which then directly infect the host leaves.

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.

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.

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