Alternaria dianthi. [Descriptions of Fungi and Bacteria].

Author(s):  
J. C. David

Abstract A description is provided for Alternaria dianthi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Dianthus spp., and other members of the Caryophyllaceae including Gypsophila and Saponaria spp. It is occasionally reported from other plants (e.g. Hibiscus esculentus (51, 1025; 42, 655)). DISEASE: Carnation blight. The fungus causes yellowing and necrosis of the host tissue, initially killing the leaves but in severe infections, also the stem and eventually the whole plant. The fungus can persist in the soil, from where it can attack seedlings, usually destroying them rapidly. It also infects the host's flowers, seed capsules and seeds. GEOGRAPHICAL DISTRIBUTION: Africa: Egypt, Malawi, Morocco, Mozambique, South Africa, Tanzania, Zambia, Zimbabwe. Asia: Cyprus, India, Japan, Malaysia, Taiwan, Thailand, Turkey, USSR (Armenia, Republic of Georgia). Australasia & Oceania: Australia (New South Wales, Queensland, South Australia), New Zealand, USA (Hawaii). Europe: Austria, Bulgaria, Czechoslovakia, Denmark, France, Germany, Hungary, Italy, The Netherlands, Norway, Poland, Romania, Spain Sweden, UK, Yugoslavia. North America: Bermuda, Canada, Jamaica, Panama, Puerto Rico, USA. South America: Brazil, Uruguay. TRANSMISSION: Successful growth and sporulation of the fungus requires warm moist conditions (optimal mycelial growth is at ca 20°C), although mycelium can survive at 0°C. Transmission of conidia is usually via wind, seeds or soil. A damp leaf surface is essential for infection.

Author(s):  

Abstract A new distribution map is provided for Dacus tryoni[Bactrocera tryoni] (Frogg.) (Dipt., Trypetidae) (Queensland Fruit-fly) Hosts: Many deciduous and subtropical fruits. Information is given on the geographical distribution in AUSTRALIA, New South Wales, Queensland, South Australia, Victoria.


Author(s):  

Abstract A new distribution map is provided for Listronotus bonariensis (Kuschel) Coleoptera: Curculionidae Attacks Lolium spp. and other pasture grasses and cereals. Information is given on the geographical distribution in SOUTH AMERICA, Argentina, Bolivia, Brazil, Chile, Uruguay, OCEANIA, Australia, New South Wales, South Australia, Tasmania, Victoria, Western Australia, New Zealand.


Author(s):  
D. W. Minter

Abstract A description is provided for Podospora excentrica. Some information on its associated organisms and substrata, dispersal and transmission, habitats and conservation status is given, along with details of its geographical distribution (South America (Venezuela), Atlantic Ocean (Portugal (Madeira)), Australasia (Australia (New South Wales, South Australia, Victoria, Western Australia)), New Zealand, Europe (Belgium, Denmark, Germany, Ireland, Italy, Netherlands, Spain, Sweden, UK)).


Author(s):  

Abstract A new distribution map is provided for Phytoplasma australiense [Candidatus] R.E. Davis et al. Bacteria: Phytoplasmas Hosts: Grapevine (Vitis spp.), pawpaw (Carica papaya) and Phormium tenax. Information is given on the geographical distribution in OCEANIA, Australia, New South Wales, Queensland, South Australia, Victoria, Western Australia, New Zealand.


Author(s):  

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.


Author(s):  

Abstract A new distribution map is provided for Pseudomonas syringae pv. maculicola (McCulloch) Young, Dye & Wilke. Hosts: Crucifers (Cruciferae) etc. Information is given on the geographical distribution in Africa, Algeria, Mauritius, Mozambique, South Africa, Zimbabwe, Asia, China, Hunan, Guangdong, Yunnan, Japan, Korea, Taiwan, Turkey, Australasia & Oceania, Australia, New South Wales, Queensland, South Australia, Tasmania, Victoria, Western Australia, Fiji, New Zealand, Europe, Bulgaria, Czechoslovakia, Denmark, Finland, Germany, Italy, Netherlands, Norway, Poland, Russia, Leningrad, Caucasus, Crimea, Ukraine, UK, Great Britain, Yugoslavia, North America, Bermuda, Canada, British Columbia, Alberta, Ontario, Quebec, USA, Central America & West Indies, Cuba, El Salvador, Puerto Rico, South America, Brazil, Sao Paulo.


Author(s):  
D. W. Minter

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.


Author(s):  
E. Punithalingam

Abstract A description is provided for Wojnowicia hirta. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cereals and grasses (Agropyron, Avena, Bromus, Calamagrostis, Calamovilfa, Dacrylis, Distichlis, Elymus, Festuca, Hordeum, Koeleria, Phleum, Poa, Secale, Sorghastrum, Sorghum, Spartina, Stipa, Triticum). DISEASE: Secondary foot rot or root rot of cereals and grasses. Also referred to as rot of mature straw. Rot of cereals and grasses is very common (5, 223; 6, 272; 7, 370; 11, 503; 12, 685; 16, 242; 48, 120; 1602) and considered to be of definite economic importance (Sprague, 1950). In France infected wheat plants have been reported to become etiolated and progressively shrivelled without producing lesions (4, 662). As the disease progresses, cells at the base of the culms were claimed to collapse resulting in the breaking of the stems and general lodging of plants in infected areas (5, 223; 12, 685). Subsequently pycnidia were reported appearing on lower leaf-sheaths above and below the soil line (1, 288). Sometimes affected wheat plants have been found to show discolouration of culm bases and roots (5, 223), or dark brown to black spots and streaks on the stem which are partly superficial (7, 370, Sprague, 1935). GEOGRAPHICAL DISTRIBUTION: Africa (Morocco, South Africa, Tunisia); Asia (Turkey); Australasia and Oceania (Australia, New South Wales, South Australia, Victoria, Western Australia); Europe (Belgium, Bulgaria, Czechoslovakia, Finland, France, Germany, Irish Republic, Italy, Netherlands, Poland, Rumania, Spain, Switzerland, UK, USSR); North America (Canada, Alberta, Saskatchewan; USA, Arkansas, California, Colorado, Dakota, Idaho, Kansas, Montana, Oregon, Washington, Wyoming). TRANSMISSION: Infected soil has been found to be the chief mode of transmission where stubble has been ploughed under (3, 191). It has also been reported that W. hirta occurs on culms overwintered in the field usually at the 2nd node (9, 639-641).


Author(s):  
D. Brayford

Abstract A description is provided for Fusarium nygamai. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Typically isolated from soil, roots of sorghum, millet, cotton, Phaseolus, etc. and plant debris. Reported to infect Striga hermonthica in sorghum (Abbasher & Sauerborn, 1992). DISEASE: Not normally regarded as an economic plant pathogen, although it may cause reduction in Striga population levels. Occasionally an opportunistic pathogen of humans (Krulder et al., 1996). GEOGRAPHICAL DISTRIBUTION: Africa: Egypt, Namibia, Nigeria, Republic of South Africa, Sudan, Zimbabwe; Australasia: Australia (Queensland, New South Wales, Northern Territories), China (76, 4386), Malaysia (Salleh & Strange, 1988), Thailand; Americas: Puerto Rico, USA (75, 7565; 76, 6666). This species appears to be widespread in arid, tropical soils. TRANSMISSION: Conidia are dispersed locally by water flow and splash droplets. Chlamydospores may be dispersed by movement of contaminated soil or plant debris.


Author(s):  
E. Punithalingam

Abstract A description is provided for Didymella fabae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Vicia faba (broad bean) (Fabaceae). DISEASE: Leaf, stem and pod spot. GEOGRAPHICAL DISTRIBUTION: Asia (China, Iraq, Israel, Japan, Korea, Pakistan, Saudi Arabia, Syria, Turkey); Australasia & Oceania (Australia: New South Wales, Tasmania, Victoria; New Zealand); Europe (Czechoslovakia, Denmark, Finland, Germany, Russia, Ukraine); North America (Canada: Nova Scotia, Manitoba); South America (Argentina) CMI Distribution Map. 513. ed. 2, 1989). Additional areas not mapped are: Africa (Egypt, Tunisia); Australasia & Oceania (Australia: South Australia); Europe (Hungary, Switzerland). TRANSMISSION: Mainly by seed borne conidia and ascospores (61, 4438; Jellis & Punithalingam, 1991; 70, 3631). It has been reported that crop debris can be an important way of carryover in Australia and Iraq (Geard, 1962; 63, 1499). Since disease spread has been noticed for up to 200 m in winter crops (60, 4748), the possibility of conidia being dispersed by wind has been suggested. In Canada A. fabae did not survive over winter in field plots ploughed down the previous year (57, 3703).


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