Septoria cucurbitacearum. [Descriptions of Fungi and Bacteria].

Author(s):  
E. Punithalingam

Abstract A description is provided for Septoria cucurbitacearum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cucumis melo, C. sativus, Cucurbita ficifolia (=C. melanosperma), C. maxima, C. moschata, C. pepo and Bryonia dioica (=B. cretica). DISEASE: Leaf spot of cantaloupe, cucumber, melon, pumpkin, squash and vegetable marrow. The visible symptoms are circular, olive brown lesions, prominent on the upper surface of the leaves. With the progress of the disease the spots enlarge, usually reaching 3-5 mm diam., occasionally 8 mm wide and soon dry up. Older lesions tend to turn white revealing several pycnidia embedded within the tissue. GEOGRAPHICAL DISTRIBUTION: Africa (Ethiopia, Kenya, Zambia); Australasia & Oceania (Australia); Europe (Bulgaria, Denmark, France, Germany, Hungary, Italy, Portugal, Rumania, USSR); North America (USA, Delaware, Massachusetts, New Hampshire, New York, Pennsylvania, Wisconsin). TRANSMISSION: Presumably by conidia disseminated by water splash in wet weather or heavy dews.

Author(s):  
D. W. Minter

Abstract A description is provided for Bifusella linearis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pinus albicaulis, P. flexilis, P. monticola, P. strobus. DISEASE: Needle blight and needle cast of white pines, tar spot needle cast, Bifusella blight. The disease apparently occurs only under moist conditions, and since its effects are usually limited to defoliation of needles two or three years old, it is not devastating. Probably infects young needles but macrosymptoms do not show up until the following spring when needles become blighted from the tip part-way to the base. The disease tends to occur principally in the lower crown (47, 2867). GEOGRAPHICAL DISTRIBUTION: North America (Canada: British Columbia, Ontario, U.S.A. : California, Colorado, Idaho, Maine, Massachusetts, Minnesota, New Hampshire, New York, North Carolina, Pennsylvania, Washington, Wisconsin). TRANSMISSION: By air-borne ascospores in wet or humid weather.


Author(s):  
E. Punithalingam

Abstract A description is provided for Phaeoseptoria vermiformis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Triticale (Triticum × Secale), Avena (oats) and Triticum (wheat). DISEASE: Leaf spot of Triticale, wheat and oats. Lesions on leaves are irregular to elliptical, light brown to straw yellow. As infection progresses lesions enlarge to form blotches extending to the margins of leaves. GEOGRAPHICAL DISTRIBUTION: East Africa and North America (Mexico, Patzcuaro). TRANSMISSION: Presumably by conidia dispersed by water splash in wet weather or heavy dews. So far the mode of infection under natural conditions and the spread of the disease have not been investigated. It has been suggested that P. vermiformis might persist on native grasses in the field and this could serve as a source of inoculum in addition to the infected stubble or debris left over from previous years crop.


Author(s):  
E. Punithalingam

Abstract A description is provided for Septoria humuli. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Humulus lupulus (hop). DISEASE: Leaf spot of hop leading to premature defoliation. The disease has been reported initially to be confined to older and lower leaves and subsequently spreading to younger and upper leaves (Putto, Koul & Saraf, 1975). Female plants have been reported as being more susceptible than male plants. The visible symptoms are minute circular or irregular lesions, 1-3 mm wide and prominent on both surfaces of the leaves. With the progress of infection these lesions enlarge to form well defined spots, up to 6 mm wide, with ash white centres. Occasionally spots coalesce to form leaf blotches. Often severely infected leaves are killed and one report claims leaves on vines up to a height of 2-3 m have been affected (5, 1985). GEOGRAPHICAL DISTRIBUTION: Asia (India, Himachal Padesh, Kashmir); Europe (Czechoslovakia, Belgium, France, Germany, Hungary, USSR); North America (USA, Kansas, New Hampshire). TRANSMISSION: No specific studies reported. Presumably by conidia disseminated by water splash during hot weather.


Author(s):  
J. M. Pérez

Abstract A description is provided for Sporisorium everhartii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: No fruits develop in infected parts of the plants. HOSTS: Andropogon glomeratus, A. brachystachys, A. floridanus, A. furcatus, A. geradi, A. glomeratus, A. microstachyus, A. scoparius, A. ternarius, A. virginicus, Gayona densiflora, Hyparrhenia diplandra, H. ruprechtii, Schizachyrium hirtiflorum (A. hirtiflorus), S. tenerum (A. tener) and S. scorparium (Poaceae). GEOGRAPHICAL DISTRIBUTION: AFRICA: Congo, South Africa (Transvaal). NORTH AMERICA: Mexico, USA (Alabama, Connecticut, Florida, Georgia, Louisiana, Maine, Mississippi, Montana, Nebraska, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Tennessee, Vermont, Virginia). CENTRAL AMERICA: Cuba. TRANSMISSION: Probably by air-borne teliospores. Wind is the most common dispersal mode of smut teliospores.


Author(s):  
P. F. Cannon

Abstract A description is provided for Tubeufia cerea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: developing on effete stromata of bark-inhabiting ascomycetes, especially members of the Diatrypaceae, probably also obtaining nutrition from the bark tissues. DISEASE: probably none, the fungus living saprobically on dead fungal tissues for at least most of its life cycle. No detailed studies of its biology in nature have been carried out. GEOGRAPHICAL DISTRIBUTION: widely distributed in the north temperate zone with a few records from the tropics. Recorded from Austria, Belgium, Canada, Guyana, India, Netherlands, Portugal, Russia, UK, USA (Florida, Illinois, Iowa, Louisiana, Maine, Maryland, Massachusetts, Minnesota, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Carolina, Ohio, Vermont, Utah). TRANSMISSION: the ascospores are presumably air-dispersed and the conidia transmitted via water-splash, but there is no experimental evidence to support these suppositions.


Author(s):  

Abstract A new distribution maps is provided for Eutypella parasitica R.W. Davidson & R.C. Lorenz. Ascomycota: Xylariales. Hosts: Acer species. Information is given on the geographical distribution in Europe (Austria and Slovenia) and North America (Ontario and Quebec, Canada, and Connecticut, Illinois, Indiana, Iowa, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New York, Ohio, Pennsylvania, Rhode Island, Vermont and Wisconsin, USA).


Author(s):  
P. F. Cannon

Abstract A description is provided for Protoventuria andromedae (Gibbera andromedae). This fungus is found on living leaves and is presumably parasitic, although very few disease symptoms result. It is found, along with its associated plants, in peat bogs including quaking bogs and raised mires. Some information on its habitats, dispersal and transmission and conservation status is given, along with details of its geographical distribution (North America (Canada (Ontario, Quebec), USA (Maine, Michigan, New Hampshire, New York)), Asia (Russia (Khanty-Mansi Autonomous Okrug)), Europe (Austria, Belgium, Denmark, Estonia, Finland, Germany, Latvia, Netherlands, Norway, Poland, Sweden, Switzerland, UK)) and hosts (including Andromeda spp.). No reports of negative economic impacts of this fungus have been found.


Author(s):  
J. E. M. Mordue

Abstract A description is provided for Ustilago longissima. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Species of Glyceria, including G. maxima, G. fluitans, G. grandis, G. multiflora, G. nemoralis, G. obtusa, G. plicata, G. striata. DISEASE: Leaf stripe smut of Glyceria. Infected plants are slightly stunted, pale or yellowish-green, and usually fail to flower. Sporulation can occur throughout the growing season of the host. GEOGRAPHICAL DISTRIBUTION: Widespread, especially in north temperate regions. Asia: India (Nilgiri Hills), USSR (Siberia); Europe: Austria, Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Hungary, Italy, Netherlands, Norway, Poland, Romania, Spain, Sweden, Switzerland, UK, USSR (Estonia, Republic of Georgia, Latvia, Russia), Yugoslavia; North America: Canada (Alberta, British Columbia, Man, NS, Ont, Que, Sask), USA (Connecticut, Colorado, Idaho, Illinois, Iowa, ME, Maine, Michigan, MN, MT, Nebraska, New Hampshire, New York, North Dakota, Oregon, Pennsylvania, Utah, Vermont, Washington State); South America: Argentina. TRANSMISSION: No detailed studies have been reported. The powdery ustilospores are readily disseminated by wind and water. Seed transmission is considered unlikely.


Author(s):  

Abstract A new distribution map is provided for Gremmeniella abietina (Lagerb.) Morelet. Hosts: Pine (Pinus) spp. Information is given on the geographical distribution in Asia, Japan, USSR, Georgia, Europe, Austria, Belgium, Bulgaria, Czechoslovakia, Denmark, Finland, France, Nancy, German Federal Republic, Greece, Iceland, Italy, Netherlands, Norway, Poland, Romania, Sweden, Switzerland, UK, USSR, Estonia, Lithuania, Yugoslavia, North America, Canada, Alberta, British Columbia, New Brunswick, Newfoundland, Nova Scotia, Ontario, Quebec, USA, Maine, Michigan, Minnesota, New Hampshire, New York, Wisconsin, Vermont.


Author(s):  

Abstract A new distribution map is provided for "Candidatus Phytoplasma fraxini". Bacteria. Hosts: Fraxinus and Syringa species. Information is given on the geographical distribution in North America (Alberta, Manitoba, Ontario, Quebec and Saskatchewan, Canada, and Colorado, Connecticut, Illinois, Indiana, Iowa, Kansas, Kentucky, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Pennsylvania, South Dakota, Utah, Vermont, West Virginia, Wisconsin and Wyoming, USA).


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