Didymascella thujina. [Descriptions of Fungi and Bacteria].

Author(s):  
D. W. Minter

Abstract A description is provided for Didymascella thujina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: 'Keithia disease' or 'cedar leaf blight'. HOSTS: Leaves of Thuja occidentalis, T. plicata. Occurring on T. plicata throughout its range in western North America, and widespread in North America on T. occidentalis, apparently confined to these two hosts, fide Pawsey (1958). GEOGRAPHICAL DISTRIBUTION: Austria, Belgium, Canada (Alberta, British Columbia, New Brunswick, Northwest Territories, Ontario, Prince Edward Island, Quebec), Denmark, Eire, Netherlands, Norway, UK (England, Scotland, Wales), USA (Alaska, Idaho, Oregon, Vermont, Washington, Wisconsin). Unsuccessful searches on introduced plants in Chile and Ukraine. With the introduction of resistant varieties of its host, this fungus is becoming less common in planted forests and on hedge trees, though it is still generally abundant in natural stands of its hosts. TRANSMISSION: By air-borne ascospores in humid conditions.

Author(s):  

Abstract A new distribution map is provided for Diplocarpon mali Y. Harada & Sawamura. Ascomycota: Helotiales. Hosts: apple (Malus spp.) and flowering quince (Chaenomeles spp.). Information is given on the geographical distribution in Europe (Italy, Mainland Italy, Romania), Asia (China, Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Menggu, Shaanxi, Shandong, Sichuan, Xinjiang, Yunnan, India, Himachal Pradesh, Jammu and Kashmir, Uttar Pradesh, Japan, Honshu, Kyushu, Korea Republic, Taiwan), North America (Canada, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, USA, Wisconsin).


Author(s):  

Abstract A new distribution map is provided for Hypoxylon mammatum (Wahl.) Miller. Hosts: Aspen and poplar (Populus) spp. Information is given on the geographical distribution in Asia, USSR, Novosibirsk, Australasia & Oceania, Australia, Europe, Czechoslovakia, Italy, UK, Channel Islands, Ukraine, Yugoslavia, North America, Canada, Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, USA.


Author(s):  

Abstract A new distribution map is provided for Rhagoletis mendax Curran Diptera: Tephritidae Attacks blueberry and other Vaccinium spp., also Gaylussacia spp. Information is given on the geographical distribution in NORTH AMERICA, Canada, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, USA, Connecticut, Florida, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Tennessee, West Virginia, Wisconsin.


Author(s):  

Abstract A new distribution map is provided for Botrytis tulipae Lind. Hosts: Tulip (Tulipa). Information is given on the geographical distribution in Asia, Iraq, Japan, Korea, Phillipines, Australasia & Oceania, Australia, South Australia, Tasmania, New Zealand, Europe, Austria, Belgium, Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Netherlands, Norway, Portugal, Romania, Switzerland, UK, Jersey, Guernsey, USSR, Yugoslavia, North America, Canada, Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Saskatchewan, USA, South America, Argentina, Chile.


2021 ◽  
pp. 1-10
Author(s):  
Alicia S.M.A. Cattiaux ◽  
Heather J. Caseley ◽  
Katherine L. Rutherford ◽  
Paul Manning

Abstract The daylily gall midge, Contarinia quinquenotata (Loew) (Diptera: Cecidomyiidae), is an ornamental pest of daylilies, Hemerocallis spp. Linneas (Asphodelaceae). Originally native to Asia, this pest was accidentally introduced to western North America, and it is believed to occur throughout other parts of North America even though its presence has not been confirmed. Using an online survey of gardeners across Canada’s “Maritimes” (the region that includes the provinces of New Brunswick, Nova Scotia, and Prince Edward Island), we determined that symptoms of the pest occurred at multiple sites across Nova Scotia, but we received no reports from Prince Edward Island or New Brunswick. Sequencing the cytochrome c oxidase 1 gene of the samples submitted by community scientists, we confirmed the daylily gall midge occurs at multiple sites across Nova Scotia. A common garden study that included 517 daylily varieties found that yellow-flowering varieties were almost twice as likely to be affected as nonyellow varieties. Early-flowering varieties were more likely to be attacked than later-flowering varieties. For each day that the date at first flowering was delayed, the likelihood of gall midge attack decreased by 16%. To avoid or mitigate damage where the daylily gall midge occurs, selecting late-flowering varieties with nonyellow flowers can be a useful complement to destructing infested flower buds.


Author(s):  

Abstract A new distribution map is provided for Acleris variana (Fernald) Lepidoptera: Tortricidae Black-headed budworm. Attacks Abies, Larix, Picea, Pseudotsuga, Tsuga Information is given on the geographical distribution in NORTH AMERICA, Canada, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, USA, Connecticut, Maine, New York.


Author(s):  
D. W. Minter

Abstract A description is provided for Phacellium rufibasis, a terrestrial fungus, apparently parasitic on branches, forming a colony which encircles the branch and rapidly causes loss of vitality of the leaves and twigs distal to the colony, also forming colonies on the under-surface of leaves, causing reddish brown spots. Some information on its habitat, dispersal and transmission and conservation status is given, along with details of its geographical distribution (North America (Canada (British Columbia, Manitoba, New Brunswick, Newfoundland & Labrador, Ontario, Prince Edward Island), USA (Alaska, Maine, Massachusetts, Michigan, New York, Oklahoma, Vermont, Wisconsin)), Atlantic Ocean (Portugal (Madeira), Spain (Canary Islands)), Europe (Belgium, Denmark, Estonia, Finland, Germany, Ireland, Latvia, Russia (Leningradskaya oblast), Sweden, UK)) and hosts.


Plant Disease ◽  
2005 ◽  
Vol 89 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Rick D. Peters ◽  
Rod J. Clark ◽  
Albert D. Coffin ◽  
Antony V. Sturz ◽  
David H. Lambert ◽  
...  

Pink rot of potato (Solanum tuberosum), caused by Phytophthora erythroseptica, is found wherever potatoes are grown, and in the last decade, it has reemerged as an economically important disease in Canada and the United States. A selection of isolates of P. erythroseptica from major potato-growing regions in North America, namely Prince Edward Island and New Brunswick, Canada, and Maine and Idaho, U.S.A., was assessed for genetic diversity with randomly chosen decanucleotide primers which were used to amplify regions of DNA to reveal polymorphisms among templates (random amplified polymorphic DNA [RAPD]). The isolates varied in their geographic origin as well as in their sensitivity to mefenoxam, as determined by an in vitro assay. In three separate RAPD screens (I, II, and III) with 23 isolates of P. erythroseptica chosen from a larger collection, 1,410, 369, and 316 robust, scorable bands were amplified, respectively. However, among the bands amplified in screens I, II, and III, only 3, 1, and 3 bands, respectively, were polymorphic. When three primers yielding polymorphisms were used to screen 106 isolates from Prince Edward Island and New Brunswick, or a representative collection of 32 isolates from Prince Edward Island, New Brunswick, Maine, and Idaho, no major variation was discovered. RAPD markers were not correlated with geographic origin or mefenoxam sensitivity of the isolates. From an evolutionary standpoint, the absence of genetic diversity among the isolates of P. erythroseptica we examined may be attributable to the relatively recent introduction of a small founding population of the pathogen in North America.


Author(s):  

Abstract A new distribution map is provided for Chrysomyxa arctostaphyli Dietel Fungi: Basidiomycota: Uredinales Hosts: Picea spp. and Arctostaphylos uva-ursi. Information is given on the geographical distribution in NORTH AMERICA, Canada, Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Northwest, Territories, Nova Scotia, Ontario, Quebec, Saskatchewan, Yukon, USA, Alaska, Arizona, Colorado, Idaho, Maine, Michigan, Montana, New Mexico, New York, Oregon, South Dakota, Utah, Washington, Wisconsin, Wyoming.


Author(s):  

Abstract A new distribution map is provided for Apiosporina morbosa (Schwein.) v. Arx Fungi: Ascomycota: Dothideales Hosts: Stone fruit (Prunus spp.). Information is given on the geographical distribution in NORTH AMERICA, Canada, Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Northwest, Territories, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, Mexico, USA, Alabama, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Mississippi, Missouri, Montana, New Jersey, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin.


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