Nectria coccinea var. faginata. [Descriptions of Fungi and Bacteria].

Author(s):  
C. Booth

Abstract A description is provided for Nectria coccinea var. faginata. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Fagus grandifolia (beech) DISEASE: Beech bark disease in association with the scale insect Cryptococcus fagi[Cryptococcus fagisuga]. GEOGRAPHICAL DISTRIBUTION: Canadian Maritime Provinces and eastern USA (Maine, Massachussetts, New Hampshire, New York, Pennsylvania) where it is reported to be spreading south (Shigo; 50, 1388). TRANSMISSION: By wind in cool wet weather; spores are discharged only in moist conditions but they may subsequently dry and be disseminated by wind.

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.


2007 ◽  
Vol 56 (1-6) ◽  
pp. 163-169 ◽  
Author(s):  
M. Ramirez ◽  
J. Loo ◽  
M. J. Krasowski

Abstract Scions collected from diseased trees and from those without symptoms of beech bark disease (BBD) were cleft-grafted in 2003 and 2004 onto rootstock of unknown resistance to BBD. Grafting success varied among genotypes and year (30% in 2003 and 12% in 2004), and improved with increasing rootstock diameter. Successful grafts were used to test resistance to the beech scale insect, Cryptococcus fagisuga (the initiating agent of BBD) by introducing eggs onto the bark of scions and allowing time for the emergence of all developmental stages of the insects. Significantly fewer insects colonized scions collected from putatively resistant trees than those collected from diseased trees. In some cases, where egg placement overlapped a portion of the rootstock, insect colonies developed on the rootstock but not on the scion collected from resistant trees. Occasionally, scions from putatively resistant trees were colonized, whereas some of those from diseased trees were not. When scions from putatively resistant trees were heavily colonized, only adult insects were present and no eggs or other life stages of the insect were found. The findings indicate that the extent of resistance to the scale insect (hence to BBD) ranges from partial to total resistance.


Author(s):  
D. W. Minter

Abstract A description is provided for Canavirgella banfieldii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Early-season blight of current-year needles of five-needle pines in the north-eastern USA. The disease has been widely attributed to ozone injury, or incorrectly identified as Meloderma desmazieresii under the earlier synonym Hypoderma desmazieresii. HOSTS: Leaves of Pinus peuce, P. strobus. Most observations are on P. strobus. Adjacent P. flexilis and P. strobiformis were uninfected. GEOGRAPHICAL DISTRIBUTION: USA (Maine, New Hampshire, New York, North Carolina, Pennsylvania, Vermont, Virginia, West Virginia). TRANSMISSION: By air-borne ascospores in humid conditions.


Author(s):  
D. W. Minter

Abstract A description is provided for Pseudohelotium pineti found on dead and whitened needles of Pinus sylvestris. Some information on its morphology, habitats, dispersal and transmission and conservation status is given, along with details of its geographical distribution (Canada (Manitoba, Sasktachewan), USA (Maryland, New Hampshire, New York, North Carolina, Pennsylvania, Virginia), India (Jammu and Kashmir), Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Italy, Netherlands, Norway, Poland, Russia (Komi Republic, Leningrad Oblast, Pskov Oblast, Republic of Karelia), Spain, Sweden, Switzerland, Ukraine and UK) and hosts (Pinus spp.).


Author(s):  
J. E. M. Mordue

Abstract A description is provided for Ustilago syntherismae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Digitaria spp., including D. filiformis, D. ischaemum, D. sanguinalis. DISEASE: Loose smut of Digitaria. Infection sometimes dwarfs the host and causes it to branch more profusely than usual (36, 657); it is also reported that vegetative vigour is much prolonged in infected plants compared with uninfected (30, 432). Surface contamination by the large number of ustilospores when shed may result in some discolouration of the entire inflorescence including sheaths and leaf blades. GEOGRAPHICAL DISTRIBUTION: Africa: 'Congo', Gambia, Kenya, Sierra Leone, South Africa, Sudan, Uganda, Zambia, Zimbabwe; Asia: Azerbaijan, China, Republic of Georgia, India, Japan, Pakistan, Russia (central Asia, far east); Australasia: Australia: NSW (31, 225); Europe: Bulgaria, Czechoslovakia, Denmark (39, 284), Germany, Hungary, Italy, Poland, Portugal, Romania, Russia (European region), Ukraine (52, 354); North America: Canada (Ontario; 46, 3383), Mexico, USA (Alabama, Arkansas, California, Connecticut, Washington DC, Delaware, Florida, Georgia, IA, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maine, MD, ME, Michigan, Montana, Missouri, MS, North Carolina, Nebraska, New Hampshire, New Jersey, New York, Ohio, Oklahoma, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Virginia; 69, 2765); South America: Argentina, Brazil, Uruguay. (33, 634; 40, 209; 48, 2203; 50, 2756; 64, 4163). TRANSMISSION: No detailed studies have been reported; ustilospores are presumably disseminated by air currents and infection is thought to be systemic.


Author(s):  
D. W. Minter

Abstract A description is provided for Lophium mytilinum, which are found on dead pine twigs, wood, bark and occasionally leaves. Details are given of its hosts (Abies spp., Chamaecyparis sp., Juniperus spp., Picea spp., Pinus spp., Pseudotsuga sp., Quercus sp., Razoumofskya sp., Rubus sp., Sequoia sp. And Tsuga sp.), geographical distribution (Canada (Alberta, British Columbia, Manitoba, Newfoundland, Northwest Territories, Nova Scotia, Ontario and Quebec), USA (California, Connecticut, Idaho, Maine, Massachusetts, New Jersey, New Hampshire, New York, Oregon, South Carolina, Vermont, Virginia and Washington), India, Pakistan, Turkey, Australia, Denmark, France, Georgia, Germany, UK, Greece, Irish Republic, New Zealand, Belgium, Czech Republic, Italy, Luxembourg, Norway, Portugal, Romania, Spain, Switzerland and Ukraine), transmission, diagnostic features and conservation status.


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.


Zootaxa ◽  
2002 ◽  
Vol 81 (1) ◽  
pp. 1 ◽  
Author(s):  
VLADIMIR I. GUSAROV

Nearctic species of the genus Geostiba Thomson, 1858 are revised. Redescription and illustrations are provided for distinguishing the genus Geostiba from other aleocharine genera. Six new species of Geostiba are described (G. (Sibiota) crepusculigena Gusarov, sp. n. from Tennessee, G. (S.) pluvigena Gusarov, sp. n. from North Carolina, G. (S.) coeligena Gusarov, sp. n. and G. (S.) nebuligena Gusarov, sp. n. from Tennessee and North Carolina, G. (S.) appalachigena Gusarov, sp. n. from West Virginia, Virginia, Maryland, Pennsylvania, New Jersey, New York, Massachusetts, Rhode Island, New Hampshire, Maine, Wisconsin and Québec; G. (S.) silvigena Gusarov, sp. n. from California). Nine species are redescribed (G. (S.) alticola Lohse & Smetana, 1988, G. (S.) balsamensis Pace, 1997, G. (S.) bicarinata Lohse & Smetana, 1988, G. (S.) graveyardensis Pace, 1997 and G. (S.) nubigena Lohse & Smetana, 1988 known from North Carolina, G. (S.) carteriensis Pace, 1997 and G. (S.) nimbicola Lohse & Smetana, 1988 known from Tennessee and North Carolina, G. (S.) impressula (Casey, 1906) known from Oregon, and G. (s. str.) circellaris (Gravenhorst, 1806) introduced from Europe to Newfoundland). A key for identification of Nearctic species of Geostiba is provided. Geostiba impressula (Casey, 1906) is removed from synonymy with G. circellaris. Ditroposipalia Scheerpeltz, 1951 is placed in synonymy with Sibiota Casey, 1906 (a valid subgenus of Geostiba), Geostiba fossata (Casey, 1910) with G. impressula (Casey, 1906), Sipaliella Casey, 1911 with Meotica Mulsant & Rey, 1873 (a valid genus in tribe Oxypodini) and Sipalia (Sipaliella) filaria Casey, 1911 with Meotica pallens (Redtenbacher, 1849). Tylosipalia Scheerpeltz, 1951 is confirmed to be a synonym of Typhlusida Casey, 1906 (a valid subgenus of Geostiba). The lectotype of Sipalia fossata Casey, 1906 is designated. The geographical distribution of Geostiba in the Southern Appalachians is discussed.


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.


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