Pythium spinosum. [Descriptions of Fungi and Bacteria].

Author(s):  
M. A. Spencer

Abstract A description is provided for Pythium spinosum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASES: Seedling damping-off. HOSTS: Wide range of plant hosts. GEOGRAPHICAL DISTRIBUTION: AFRICA: South Africa. NORTH AMERICA: Canada, USA (Florida, Hawaii, Iowa). SOUTH AMERICA: Argentina. ASIA: China (Zhejiang), India, Japan, Korea, Taiwan. AUSTRALASIA: Australia (Queensland), New Zealand. EUROPE: France, Germany, Great Britain, Italy, Netherlands. TRANSMISSION: Contaminated soil, organic matter (oospores) and water (sporangia).

Author(s):  
C. S. Millar

Abstract A description is provided for Naemacyclus minor. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pinus caribaea, P. contorta, P. flexilis, P. jeffreyi, P. montana, P. mugo, P. nigra, P. patula, P. ponderosa, P. radiata, P. sabiniana, P. strobus, P. sylvestris, P. uncinata, P. wallichiana. DISEASE: Premature needle cast in nursery and plantation. GEOGRAPHICAL DISTRIBUTION: Africa (Kenya, Malawi, Morocco, South Africa, Tanzania), Asia (Pakistan), Australasia (Australia, New Zealand), Europe (Austria, Belgium, Czechoslovakia, Denmark, France, Germany, Great Britain, Italy, Spain, Switzerland), North America (USA: California, Michigan, Pennsylvania, Canada: Ontario), South America (Chile, Colombia, Ecuador, Uruguay). TRANSMISSION: By air-borne ascospores in humid or wet weather.


Author(s):  

Abstract A new distribution map is provided for Graphognathus leucoloma (Boh.) (Col., Curculionidae) (A White-fringed Beetle). Hosts: Wide range of vegetables and other crops and weeds. Information is given on the geographical distribution in AFRICA, Republic of South Africa, AUSTRALASIA, and PACIFIC ISLANDS, Australia, New Zealand, NORTH AMERICA, U.S.A., SOUTH AMERICA, Argentina, Brazil, Chile, Peru, Uruguay.


Author(s):  
G. C. Kinsey

Abstract A description is provided for Phoma terrestris. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Pink root of Allium spp., principally onion but also affecting leek, shallot, garlic and chive. Possibly also a soil-borne saprobe and opportunistically pathogenic on other plants. HOSTS: From roots of Allium spp. Many other hosts reported, including Agropyron, Agrostis, Andropogon, Apostasia, Arctostaphylos, Artemisia, Arthraxon, Asparagus, Avena, Bambusa, Bouteloua, Bromus, Calamovilfa, Cenchrus, Chrysothamnus, Citrus, Clermontia, Cordia, Cucumis, Cucurbita, Cymbopogon, Cynodon, Dactylis, Dioscorea, Distichlis, Echinochloa, Elymus, Eragrostis, Eucalyptus, Festuca, Fragaria, Gentiana, Glycine, Hebe, Holcus, Hordeum, Ipomoea, Juniperus, Kentia, Koeleria, Lepidium, Linum, Lycospersicon, Medicago, Melilotus, Muhlenbergia, Musa, Oryza, Oryzopsis, Panicum, Phaseolus, Phleum, Pinus, Piper, Pisum, Poa, Populus, Purshia, Ribes, Rumex, Saccharum, Salix, Salvinia, Schedonnardus, Setaria, Sitanion, Solanum, Sorghum, Spinacia, Stipa, Trifolium, Triticum, Verbascum, Vigna, Vulpia and Zea. Also from soil, air, plant debris, cysts of the beet (Beta) cyst-nematode Heterodera and nasal swab of horse (Equus). GEOGRAPHICAL DISTRIBUTION: Worldwide. Records on Allium spp. include AFRICA: Egypt, Senegal, Sierra Leone, South Africa, Sudan, Uganda. NORTH AMERICA: Canada, USA. SOUTH AMERICA: Argentina, Brazil, Venezuela. ASIA: Brunei, China (Hong Kong), Israel, Mauritius, Pakistan. AUSTRALASIA: Australia, New Zealand. EUROPE: Germany, Great Britain, Greece, Netherlands, Poland. TRANSMISSION: Soil-borne.


Author(s):  
J. N. Kapoor

Abstract A description is provided for Podosphaera leucotricha. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Malus spp., chiefly on M. pumila (apple), peach (Prunus persica), quince (Cydonia ualgaris) and Photinia spp. also attacked (Hirata, 1966). Also reported on almond fruit (43, 2544). DISEASE: Powdery mildew of apple. GEOGRAPHICAL DISTRIBUTION: Africa (? Kenya, Rhodaia, South Africa, Tanzania); Asia (China, India, Israel, Japan, U.S.S.R.); Australia and New Zealand, Europe (widely distributed) North America (Canada and U.S.A.); South America (Argentina, Brazil, Chile, Colombia, Peru). (CMI map 118). TRANSMISSION: Overwinters on host as dormant mycdium in blossom buds. The role of deistothecia in overwintering is doubtful. Spread by wind-borne conidia (Anderson, 1956).


Author(s):  

Abstract A new distribution map is provided for Pyrenophora avenae Ito & Kuribay. Hosts: Oats (Avena). Information is given on the geographical distribution in AFRICA, Angola, Egypt, Kenya, Malagasy Republic, Morocco, South Africa, ASIA, China (Kiangsu), India, Israel, Japan, Nepal, Pakistan, Taiwan, Turkey, USSR (Soviet Far East, Tashkent, Tomsk), AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Austria, Britain & Northern Ireland, Bulgaria, Cyprus, Denmark, Finland, France, Germany, Irish Republic, Italy, Netherlands, Norway, Romania, Sweden, USSR (Latvia) (Byelorussia), NORTH AMERICA, Canada (general), USA (general), SOUTH AMERICA, Argentina (Buenos Aires), Brazil, Colombia, Guatemala.


Author(s):  
J. E. M. Mordue

Abstract A description is provided for Ustilago hypodytes. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: A wide range of grasses, including species of Agropyron (many), Ammophila, Brachypodium, Bromus, Calamagrostis, Diplachne, Distichlis, Elymus (many), Festuca, Glyceria, Hilaria, Hordeum, Haynaldia, Lygeum, Melica, Orysopsis, Panicum, Phalaris, Phleum, Poa (many), Puccinellia, Secale, Sitanion, Sporobolus, Stipa (many), and Trisetum. DISEASE: Stem smut of grasses. GEOGRAPHICAL DISTRIBUTION: Chiefly a temperate species found in Europe (including Denmark, Finland, France, Germany, Hungary, Italy, Romania, Sweden, Switzerland, UK, USSR, Yugoslavia) and North America (Canada, USA) and extending to central and South America (Argentina, Peru, Uruguay), N. Africa (Libya, Morocco, Tunisia), Japan, Australia and New Zealand. TRANSMISSION: Not fully understood, though inoculation experiments have demonstrated that infection occurs in mature vegetative plants (possibly through meristematic tissue), not seeds or flowers (22, 240; 24, 511). Once established, infection is systemic, probably overwintering in the root system and spreading by vegetative multiplication of host plants as well as from plant to plant (24, 511; 19, 720).


Author(s):  
T. V. Andrianova

Abstract A description is provided for Septoria antirrhini. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot, leaf drying, defoliation. HOSTS: Antirrhinum antirrhiniflorum, A. majus, A. siculum (Scrophulariaceae). GEOGRAPHICAL DISTRIBUTION: AFRICA: South Africa. NORTH AMERICA: Canada, USA. SOUTH AMERICA: Chile, Colombia. ASIA: Armenia, Azerbaijan, China, Iran, Israel. AUSTRALASIA: Australia, New Zealand. EUROPE: Bulgaria, Czech Republic, Estonia, France, Germany, Great Britain, Hungary, Ireland, Italy, Netherlands, Portugal, Romania, Ukraine, former Yugoslavia. TRANSMISSION: Not reported, but almost certainly by airborne, splash-dispersed conidia from infected plant debris and seed stocks. The disease is significantly more severe under wet weather conditions (SINADSKIY et al., 1985).


Author(s):  
G. M. Waterhouse

Abstract A description is provided for Pythium intermedium. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On a wide range of hosts represented by the following families: Begoniaceae, Bromeliaceae, Chenopodiaceae, Compositae, Coniferae, Cruciferae, Euphorbiaceae, Geraniaceae, Gramineae, Leguminosae, Liliaceae, Linaceae, Moraceae, Onagraceae, Ranunculaceae, Rosaceae, Solanaceae, Ulmaceae, Violaceae; also in the Equisetales and Filicales. DISEASES: Damping-off of seedlings, foot rot and root rot of ornamentals, occasionally of crop plants and trees. GEOGRAPHICAL DISTRIBUTION: Asia (China); Australia & Oceania (Hawaii); Europe (England, Belgium, France, Germany, Holland, Sweden, U.S.S.R.); North America (U.S.A.); South America (Argentina). TRANSMISSION: A common soil inhabitant.


Author(s):  

Abstract A new distribution map is provided for Sclerotium cepivorum Berk. Hosts: Onion, shallot, leek etc. (Allium spp.). Information is given on the geographical distribution in AFRICA, Egypt, Libya, South Africa, Uganda, Zimbabwe, ASIA, China, India, Iran, Israel, Japan, AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Azores, Britain & Northern Ireland, Bulgaria, Cyprus, Czechoslovakia, Denmark, Finland, France, Germany, Greece, Italy, Netherlands, Norway, Romania, Spain, Sweden, Switzerland, USSR, Yugoslavia, NORTH AMERICA, Canada, USA, SOUTH AMERICA, Argentina, Bolivia, Brazil, Chile, Colombia, Uruguay, Venezuela.


Author(s):  

Abstract A new distribution map is provided for Fusicladium effusum G. Winter. Ascomycota: Capnodiales. Hosts: Carya spp. especially pecan (C. illinoinensis). Information is given on the geographical distribution in Africa (South Africa), North America (Canada, Mexico, Alabama, Florida, Georgia, Illinois, Kansas, Louisiana, Mississippi, Missouri, North Carolina, Oklahoma, Texas, and Wisconsin, USA), South America (Argentina, Parana, Brazil, and Paraguay), and Oceania (New Zealand).


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