Phyllachora contigua. [Descriptions of Fungi and Bacteria].

1986 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
Growth Rate ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Heavy Infestation

Abstract A description is provided for Phyllachora contigua. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Recorded from Millettia caudata, M. pallens and M.? stapfiana. DISEASE: Causes a leaf spot of Millettia species. Nothing is known of the development of the disease, but it is likely to cause little damage to the host in common with other Phyllachora species. However, heavy infestation would undoubtedly significantly affect the growth rate of the tree. Individual infections are probably confined to the leaves in which they occur. GEOGRAPHICAL DISTRIBUTION: Africa: Ethiopia, Ghana, Guinea, Sierra Leone. Asia: India. TRANSMISSION: This has not been studied, but probably occurs through air dispersal of ascospores and direct infection of leaves, the ascospores germinating to produce appressoria and infection pegs.

Cochliobolus pallescens. [Descriptions of Fungi and Bacteria].

1990 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
Hong Kong ◽  
Sierra Leone ◽  
Papua New Guinea ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Solomon Islands ◽  
Ear Rot ◽  
Black Point ◽  
Leaf Spots ◽  
Windward Islands

Abstract A description is provided for Cochliobolus pallescens. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Common on many graminicolous and non-graminicolous hosts. Important cereals and grasses include Eleusine, Hordeum, Oryza, Panicum, Paspalum, Pennisetum, Poa, Saccharum, Setaria, Sorghum, Triticum and Zea economically important dicot hosts include Allium (59, 4867), Arachis (53, 1647), Brassica (66, 3075), Canna, Calendula, Calotropis (44, 1832; 66, 3587), Carica (61, 5129), Cinnamomum, Citrus (68, 843), Coriandrum, Dahlia, Fagopyrum (64, 2425), Gaillardia, Hevea (56, 1257; 67, 5560), Musa (54, 4051), Solanum (50, 3484). DISEASE: Leaf spots of cereals, black point of wheat (44, 102), leaf spot and on stems of rubber (56, 1257; 67, 5560), ear rot of barley (62, 1005), rot of garlic (59, 4867). GEOGRAPHICAL DISTRIBUTION: Australia, Bangladesh, Brunei, Burma, Canada, Colombia, Cuba, Denmark, Egypt, Ethiopia, Fiji, Ghana, Guinea, Hong Kong, India, Indonesia, Iran, Jamaica, Japan, Kenya, Malaysia, Malawi, Nepal, Nigeria, Pakistan, Papua New Guinea, Peru, Philippines, Sierra Leone, Singapore, Solomon Islands, Somalia, Sri Lanka, Swaziland, Sudan, Taiwan, Tanzania, Thailand, Trinidad, USA, USSR, Venezuela, Windward Islands, Zambia, Zimbabwe. TRANSMISSION: By wind-borne conidia and seed-borne.

Pestalotiopsis mangiferae. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
Hong Kong ◽  
Dominican Republic ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Host Plants ◽  
Solomon Islands ◽  
Mangifera Indica ◽  
Brown Spot ◽  
Leaf Spots

Abstract A description is provided for Pestalotiopsis mangiferae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Mangifera indica; also on Anacardium occidentale, Combretum decandrum, Eucalyptus spp., Mimusops spp., Vitis vinifera and many other unrelated host plants. DISEASE: Grey leaf spot of Mangifera indica. The spots vary in size from a few mm to several cm in length, are usually sharply delimited by a dark, raised border, and are silvery grey above and grey to brown below; leaf spots on other hosts are similar. Brown spot or rot of mango fruits is also known. GEOGRAPHICAL DISTRIBUTION: Ghana, Nigeria, Sierra Leone, Tanzania, Uganda, Zaire, Zambia; Bangladesh, Brunei, Burma, Hong Kong, India, Malaysia, Nepal, Sabah, Solomon Islands, Sri Lanka; Australia; Dominican Republic; Venezuela. TRANSMISSION: Inoculation studies with conidia and mycelium have shown P. mangiferae to be a weak parasite, capable of infecting young injured leaves, injured fruits, older uninjured leaves and healthy fruits if in contact with diseased tissue (35, 378; 40, 421). It has been isolated from soil, but the possibility of transmission through soil has not been investigated.

Cercospora mikaniicola. [Descriptions of Fungi and Bacteria].

1997 ◽  
Author(s):  
H. Y. M. Leung
Keyword(s):  
Puerto Rico ◽  
Hong Kong ◽  
Sierra Leone ◽  
Papua New Guinea ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Solomon Islands ◽  
New Guinea ◽  
Stem Canker ◽  
Mikania Micrantha

Abstract A description is provided for Cercospora mikaniicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Mikania cordata, Mikania micrantha (Asteraceae). DISEASE: Leaf spot and stem canker. GEOGRAPHICAL DISTRIBUTION: Bangladesh, Brazil, Cuba, Colombia, Fiji, Guadalcanal, Hong Kong, India, Jamaica, Malaysia, Niue, Pakistan, Papua New Guinea, Puerto Rico, Samoa, Sierra Leone, Singapore, Solomon Islands, Tuvalu, USA (Florida), Vanuatu. TRANSMISSION: Conidia are presumably air-dispersed but there are no detailed studies.

Phoma sorghina. [Descriptions of Fungi and Bacteria].

1985 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
Solomon Islands ◽  
Stem Canker ◽  
Crown Rot ◽  
Irian Jaya ◽  
Weed Hosts ◽  
A Minor

Abstract A description is provided for Phoma sorghina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Gramineae and all kinds of plants. Also isolated from soil, air and various animal sources. DISEASE: A minor leaf spot of cereals and grasses. The visible symptoms vary considerably; on sorghum leaves spots are usually irregular or rounded, yellowish-brown or grey with definite reddish-purple margins or indefinite in outline, reaching 1 cm or more in width. Pycnidia develop within spots on leaves, glumes and seeds. Also the fungus has been implicated with pre- and post-emergence death of seedlings of Macroptilium and Sylosanthes species (54, 1779) crown rot of bananas (61, 3556), leaf spot of Agave americana and stem rot of Euphorbia tirucalli (63, 3383), brown stem canker of Leucosperum cordifolium (56, 253). GEOGRAPHICAL DISTRIBUTION: A ubiquitous fungus occurring in tropical and subtropical regions. Africa (Botswana, Cameroon, Egypt, Ethiopia, Gambia, Kenya, Malawi, Mauritius, Mozambique, Nigeria, Senegal, Sierra Leone, South Africa, Sudan, Tanzania, Togo, Uganda, Zaire, Zambia, Zimbabwe); Asia (Bangladesh, Brunei, Burma, China, Hong Kong, India, Indonesia (Irian Jaya), Laos, Malaysia, Nepal, Pakistan, Saudi Arabia, Sri Lanka, Taiwan, USSR); Australasia and Oceania (Australia, Hawaii, New Zealand, Papua New Guinea, Solomon Islands); Europe (Germany, Portugal, Italy, UK); North America (Canada, USA); Central America and West Indies (Antigua, Guatemala, Honduras, Jamaica, Nicaragua, Puerto Rico, Trinidad); South America (Argentina, Bolivia, Brazil, Colombia). TRANSMISSION: Probably by contaminated seed; the fungus has been found on or isolated from several seed samples (1, 289; 33, 599; 47, 2153; 54, 1779; 60, 367; 61, 4102). In Taiwan P. sorghina has been found to be transmitted from seed to seedlings (62, 4281). The fungus has also been claimed to persist on trash and weed hosts and remain viable up to 1 yr but lose its viability after 2 yr storage on dry infected leaves (Koch & Rumbold, 1921).

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.

Pseudocercospora neodeightonii. [Descriptions of Fungi and Bacteria].

1994 ◽  
Author(s):  
B. C. Sutton
Keyword(s):  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot

Abstract A description is provided for Pseudocercospora neodeightonii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Terminalia albida Sc. Elliot (Combretaceae). DISEASE: Leaf spot. GEOGRAPHICAL DISTRIBUTION: Sierra Leone. TRANSMISSION: Presumably by conidia dispersed by wind, less so by water.

Mycovellosiella cajani. [Descriptions of Fungi and Bacteria].

1979 ◽  
Author(s):  
J. M. Waller
Keyword(s):  
East Africa ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
Pigeon Pea ◽  
Carry Over ◽  
A Minor

Abstract A description is provided for Mycovellosiella cajani. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cajanus, Callicarpa, Desmodium and Solanum verbascifolium. DISEASE: Causes a minor leaf spot of pigeon pea. The spots are usually small, round with an indefinite margin and are usually pale brown in the centre with a darker border. GEOGRAPHICAL DISTRIBUTION: East Africa, Sierra Leone, Nigeria, West Indies, Venezuela, Mauritius, India, Pakistan, Burma and Taiwan. TRANSMISSION: By air-borne conidia and may carry over on crop debris.

Pseudocercospora abelmoschi. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
P. M. Kirk
Keyword(s):  
North America ◽  
Middle East ◽  
South America ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
East Indies ◽  
New Hebrides

Abstract A description is provided for Pseudocercospora abelmoschi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On species of Hibiscus, especially H. esculentus. DISEASE: Causes a leaf spot or blight on Hibiscus spp. GEOGRAPHICAL DISTRIBUTION: Africa (Gabon, Ghana, Guinea, Kenya, Malawi, Nigeria, Sierra Leone, Sudan, Tanzania, Togo, Uganda), Asia (Burma, India, Nepal, Pakistan), East Indies (Brunei, Malaya, New Hebrides, Philippines, Sarawak, Taiwan), Middle East (Yemen), Europe (Italy: San Domingo), North America (USA), West Indies (Antigua, Grenada, Jamaica, St. Vincent, Trinidad), South America (Venezuela). TRANSMISSION: By air-borne conidia.

Phyllachora leucospila. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot

Abstract A description is provided for Phyllachora leucospila. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aganope sp., Millettia barteri, M. chrysophylla, M. lane-poolei, M. rhodantha, M. warner (syn. M. porphyrocalyx). DISEASE: Necrotic leaf spot. GEOGRAPHICAL DISTRIBUTION: Ghana, Guinea, Sierra Leone. TRANSMISSION: Almost certainly by dispersal of ascospores on air currents.

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.

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