Drechslera dematioidea. [Descriptions of Fungi and Bacteria].

Author(s):  
A. Sivanesan

Abstract A description is provided for Drechslera dematioidea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Agrostis, Anthoxanthum, Avena, Cynodon, Dactylis, Eragrostis, Festuca, Hordeum, Lolium, Paspalum, Phleum and Triticum. Also isolated from Iris, Leucospermum, Pinus and Pseudotsuga. DISEASE: Leaf spot of grasses and blight of pincushions. GEOGRAPHICAL DISTRIBUTION: Australia, Europe, New Zealand, North America, South Africa (26, 172; 34, 324, 711; 55, 2077; 65, 4975; 66, 1395). TRANSMISSION: By wind-borne conidia, seed-borne.

Author(s):  
J. C. David

Abstract A description is provided for Cladosporium echinulatum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Dianthus spp., occasionally also on other similar members of the Caryophyllaceae, such as Lychnis and Saponaria. DISEASE: Leaf spot of carnation. GEOGRAPHICAL DISTRIBUTION: Africa: Kenya, Morocco, South Africa, Uganda. Asia: Cyprus, India, Iran, Japan Turkey. Australasia: New Zealand. Europe: Austria, Belgium, Bulgaria, Czechoslovakia, England, Finland, Italy, Iceland, Norway, Romania, Spain, Sweden, Switzerland, West Germany, Yugoslavia. North America: Canada (British Columbia), El Salvador, Mexico, USA (California, Florida, Massachusetts, New York, Oregon, Texas). South America: Argentina, Brazil, Chile, Columbia, Peru. TRANSMISSION: Conidia are dispersed by wind or rain, spreading from leaf to leaf, or to new plants.


Author(s):  
C. Booth

Abstract A description is provided for Taphrina wiesneri. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: cherry, apricot. DISEASE: Witches' broom and leaf curl of cherry and apricot (58, 1402). Also known as buckwood or bull-bough. The reddish to reddish-purple colour of the infected leaves together with the witches' broom type of growth are characteristic of the disease. GEOGRAPHICAL DISTRIBUTION: Australia, New Zealand, South Africa, Japan, Asia, Europe (including Russia; 58, 1402). North America, South America (CMI map 199, ed. 2, 1967). TRANSMISSION: By blastosporic conidia or ascospores from infected tissue. Over-wintering on bud scales and in infected wood.


Author(s):  
M. B. Ellis

Abstract A description is provided for Mycosphaerella macrospora. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Iris, Glodiolus; also recorded from Narcissus, Freesia and Hemerocallis. DISEASE: Leaf spot or blotch of iris. Initially, symptoms appear as small water-soaked spots soon turning brown and enlarging to produce oval lesions with a greyish centre and dark brown margin. These become irregular and coalesce and may destroy much of the leaf tissue. The disease is most serious after flowering and on the distal portions of leaves. GEOGRAPHICAL DISTRIBUTION: Europe, North America, South Africa, Australia and Middle East. TRANSMISSION: Conidia are dispersed by wind and rain. Overwintering infected leaf debris is an important source of spring inoculum. The perfect state appears to be uncommon.


Author(s):  
K. Schubert

Abstract A description is provided for Fusicladium effusum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot, pecan scab. HOSTS: Carya spp. (Juglandaceae), including C. aquatica, C. cordiformis, C. glabra, C. illinoensis, C. ovata and C. tomentosa. GEOGRAPHICAL DISTRIBUTION: AFRICA: South Africa. NORTH AMERICA: Canada, USA (Alabama (NESBITT et al., 1997), Florida, Georgia, Illinois, Louisiana, Kansas, Missouri, Oklahoma, North Carolina, Texas, Wisconsin). CENTRAL AMERICA: Mexico (GARZA-LOPEZ et al., 1996). SOUTH AMERICA: Brazil (MENDES et al., 1998), Paraguay (KOBAYASHI, 1984). AUSTRALASIA: New Zealand (North Island). TRANSMISSION: By airborne conidia (GOTTWALD & BERTRAND, 1982).


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):  

Abstract A new distribution map is provided for Ceroplastes destructor Newst. (Homopt., Coccoidea) (White Wax Scale). Hosts: Citrus, coffee, various fruit and shade trees. Information is given on the geographical distribution in AFRICA, Bechuanaland, Congo, British Cameroons, Kenya, Madagascar, Nyasaland, San Thomé, Southern Rhodesia, Sudan, Tanganyika, Uganda, Union of South Africa, AUSTRALASIA and PACIFIC ISLANDS, Australia, New Guinea, New Zealand, NORTH AMERICA, Mexico, U.S.A.


Author(s):  
A. Sivanesan

Abstract A description is provided for Pyrenophora erythrospila. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Agrostis, Hordeum and Triticum. DISEASE: Leaf spot of bent grass and red top. GEOGRAPHICAL DISTRIBUTION: Australia, Europe, New Zealand, North America. TRANSMISSION: By wind-borne conidia.


Author(s):  
J. E. M. Mordue

Abstract A description is provided for Entyloma serotinum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Symphytum spp., including S. asperrimum, S. bulbosum, S. cordatum, S. officinale, S. ottomanum and S. tuberosum; Borago officinalis; also recorded on Amsinckia, Lappula and Mertensia spp. (in USA) and Pulmonaria (in Europe, but see 64, 4163). DISEASE: Leaf spot of Symphylum, less frequently (though with similar symptoms) of other members of the Boraginaceae.GEOGRAPHICAL DISTRIBUTION: Africa: Algeria. Asia: Israel, USSR (Republic of Georgia). Australasia: New Zealand. Europe: widespread, including Austria, British Isles, Czechoslovakia, Denmark, France (including Corsica), Germany, Hungary, Italy, Netherlands, Poland, Portugal, Romania, Spain, Switzerland, USSR (Latvia), Yugoslavia. North America: USA. TRANSMISSION: Ustilospores survive on infected plant remains and in soil, and germinate to infect seedlings and the new seasons's leaves. In Europe conidia may also over-winter and initiate new infections in spring (Kaiser, 1936). During the growing season, conidia are disseminated by air currents and water-splash.


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.


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