Gymnosporangium clavipes. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Pyrus Communis ◽  
Juniperus Communis ◽  
Malus Sylvestris ◽  
Leaf Veins ◽  
The Usa

Abstract A description is provided for Gymnosporangium clavipes. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia on quince (Cydonia vulgaris); apple (Malus sylvestris) and hawthorn (Crataegus), also on Amelanchier, Aronia, Cheanomeles, Cotoneaster, Mespilus, Photinia, Pyrus and Sorbus but not of any importance on pear (Pyrus communis). Telia on Juniperus communis, J. sihirica and J. virginiana. DISEASE: Quince rust. Aecia chiefly on fruit, sometimes on fusiform swellings of stems and leaf veins of quince; not reported on apple foliage and though infections damage the fruit aecial pustules are rarely formed on fruit of apple. Telia on slight fusiform swellings of twigs and larger branches of juniper. GEOGRAPHICAL DISTRIBUTION: Widespread throughout Canada and the USA. Also reported from Mexico (CMI Map 121, ed. 2, 1975).

Gymnosporangium globosum. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Related Species ◽  
Pyrus Communis ◽  
Juniperus Virginiana ◽  
Malus Sylvestris ◽  
The Usa

Abstract A description is provided for Gymnosporangium globosum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia chiefly on hawthorn (Crataegus), also on apple (Malus sylvestris) and other Malus spp., pear (Pyrus communis) and Sorbus. Telia on Juniperus virginiana and related species of the 'sabina' group. DISEASE: American hawthorn rust. Aecia chiefly on the leaves, rare on fruit. Telia perennial on globoid stem galls on juniper. GEOGRAPHICAL DISTRIBUTION: Widespread in eastern states of Canada and the USA. Also recorded in Alaska (CMI Map 123, ed. 2, 1975).

Gymnosporangium tremelloides. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Juniperus Communis ◽  
Malus Sylvestris

Abstract A description is provided for Gymnosporangium tremelloides. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia chiefly on apple (Malus sylvestris) and Sorbus, also on other Malus spp. and quince (Cydonia vulgaris). Telia on Juniperis communis and other species of the 'oxycedrus' group. DISEASE: European apple rust. Aecia on leaves. Juniper gall rust, telia on fusiform or gall-like swellings of the smaller branches of juniper (Juniperus communis) or on hemispheric swellings along the sides of large branches. GEOGRAPHICAL DISTRIBUTION: Widely distributed in Europe (but not in Britain) and extending into N.W. Africa. Also in China and in western N. America from Alaska to Colorado and Utah.

Gymnosporangium clavariiforme. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
New Zealand ◽  
North America ◽  
Middle East ◽  
Geographical Distribution ◽  
Pyrus Communis ◽  
Juniperus Communis ◽  
Central Usa

Abstract A description is provided for Gymnosporangium clavariiforme. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia principally on hawthorn (Crataegus), also recorded on pear (Pyrus communis), quince (Cydonia vulgaris), Amelanchier, Aronia, Cotoneaster and Sorbus. Telia on Juniperus communis and other species of the 'oxycedrus' group. DISEASE: European hawthorn rust. Aecia on leaves, stems and fruit. Telia on long fusiform swellings or cankers on branches; sometimes witches' brooms present. GEOGRAPHICAL DISTRIBUTION: Throughout Europe, from Scandinavia, Britain and Spain to the Middle East in Asia. Also in India, Kamchatka, Korea and Japan. In North America, across southern Canada, northern and central USA from coast to coast. Also reported from N. Africa and found in New Zealand but eradicated.

Gymnosporangium juniperi-virginianae. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Related Species ◽  
Juniperus Virginiana ◽  
Malus Sylvestris ◽  
The Usa ◽  
Crab Apple

Abstract A description is provided for Gymnosporangium juniperi-virginianae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia on apple (Malus sylvestris) and crab apple (Malus sp.). Telia on Juniperus virginiana and related species of the 'sabina' group. DISEASE: American apple rust. Aecia chiefly on the leaves but also on stems and fruit. Telia on globoid or kidney-shaped galls of juniper. GEOGRAPHICAL DISTRIBUTION: Widespread in the USA east of the Rockies, also in California, Ontario and Quebec (CMI Map 61, ed. 2, 1965).

Gymnosporangium libocedri. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Pyrus Communis ◽  
Northern California ◽  
Malus Sylvestris

Abstract A description is provided for Gymnosporangium libocedri. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia on apple (Malus sylvestris) and other Malus spp., pear (Pyrus communis) and quince (Cydonia vulgaris). Also on Amelanchier, Chaenomeles, Crataegus and Sorbus. Telia on Calocedrus (Libocedrus) decurrens. DISEASE: Aecia on leaves and fruits. Telia on leaves; usually not causing distortions but sometimes witches' brooms present. GEOGRAPHICAL DISTRIBUTION: Northwestern USA (Washington, Oregon to northern California and Nevada).

Colpoma juniperi. [Descriptions of Fungi and Bacteria].

1996 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
New York ◽  
Geographical Distribution ◽  
Natural Forest ◽  
Juniperus Communis ◽  
The Usa

Abstract A description is provided for Colpoma juniperi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Juniperus communis (bark, twig), J. communis subsp. nana (twig), J. nana [=J. communis subsp. nana] (twig), J. sibirica (twig), Juniperus sp. (twig). DISEASE: Colpoma juniperi is found on living and dead branches, typically on old bushes or trees in undisturbed natural forest, but also on long-established dwarf bushes at higher altitudes. Unlike branches on other plants inhabited by other species of Colpoma, those of Juniperus bearing C. juniperi are not noticeably brittle. It is usually found only on the lower part of the tree or bush, mostly near the centre of the tree. GEOGRAPHICAL DISTRIBUTION: Austria, Estonia, Finland, former Czechoslovakia [fide Holm & Holm, 1977], Greenland [fide Holm & Holm, 1977], Iceland [fide Holm & Holm, 1977], Italy, Norway, Poland, Sweden, Switzerland, UK (Scotland), Ukraine. The fungus may also exist in the USA (New York) [fide Holm & Holm, 1977], but this could be Coccomyces petersii incorrectly identified. Colpoma juniperi is common in northern Scandinavia, becoming rarer further south, and appears to be absent from Denmark [fide Holm & Holm, 1977]. Altitude records exist up to 1850m (Ukraine), 870m (Norway) and 760m (Scotland). TRANSMISSION: By air-borne ascospores in humid conditions; ascomata containing ascospores have been observed from May to July; ascomata which no longer contain ascospores have been observed in September.

Gymnosporangium asiaticum. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Pyrus Communis ◽  
Japanese Pear ◽  
European Pear ◽  
Juniperus Chinensis ◽  
The Usa

Abstract A description is provided for Gymnosporangium asiaticum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia on quince (Cydonia vulgaris), European pear (Pyrus communis), Japanese pear (P. sinensis) and other Pyrus spp., Chaenomeles spp. and Photinia spp. (and possibly Crateagus spp.). Telia on Juniperus chinensis and J. procumbens. DISEASE: Japanese pear rust. Aecia on leaves. Telia on leaves and green stems of juniper; not causing any swelling of tissues. GEOGRAPHICAL DISTRIBUTION: Japan, Korea, China. Intercepted in the USA.

Gymnosporangium yamadae. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Malus Sylvestris ◽  
Juniperus Chinensis

Abstract A description is provided for Gymnosporangium yamadae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia on apple (Malus sylvestris) and other Malus spp. Telia on Juniperus chinensis. DISEASE: Japanese apple rust. Aecia on leaves rarely on stems and fruit. Telia on globoid swellings or galls of juniper. GEOGRAPHICAL DISTRIBUTION: Japan, Korea, China.

Podosphaera clandestina. [Descriptions of Fungi and Bacteria].

1975 ◽  
Author(s):  
S. M. Khairi
Keyword(s):  
Host Plant ◽  
Geographical Distribution ◽  
Secondary Infection ◽  
Pyrus Communis ◽  
Crataegus Monogyna ◽  
Terminal Buds

Abstract A description is provided for Podosphaera clandestina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Crataegus monogyna, C. pentagyna, C. punctata, Mespilus germanica, Cratoegomespilus grandiflora, C. dardari, Pyrus communis, Cydonia vulgaris, Pyrocydonia winkleri and P. danieli. DISEASE: Hawthorn mildew. Severe attacks cause defoliation and death of terminal buds on young seedlings and on soft shoots on hedges and trees. The disease has been recorded on hawthorn fruits. The host plant can be grown only from seeds. GEOGRAPHICAL DISTRIBUTION: Worldwide (Salmon, 1900; 45, 3081). Cleistothecia play no part in the disease in England. The overwintering mycelium, inside infected buds, survives until the following spring. These infected buds are the primary infections found each year. Secondary infection is by air-borne conidia.

Trimmatostroma scutellare. [Descriptions of Fungi and Bacteria].

2007 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Czech Republic ◽  
Geographical Distribution ◽  
Pinus Contorta ◽  
Conservation Status ◽  
Larix Decidua ◽  
Cladosporium Cladosporioides ◽  
Diagnostic Features ◽  
Juniperus Communis ◽  
Cedrus Libani

Abstract Descriptions are given of Trimmatostroma scutellare, which are found on dead decaying branches, twigs and cones of conifers, including information on its geographical distribution (USA (California), Russia, Austria, Bulgaria, Czech Republic, UK, Iceland, Norther Ireland, Poland, Sweden, Switzerland and Ukraine), hosts (Abies sp., Cedrus libani, Juniperus communis, Larix decidua, L. europaea, L. kaempferi, L. komarovii, L. sibirica, Larix sp., Pinus contorta, P. maritima var. nigra, P. mugo, P. nigra, P. radiata, P. sibirica, P. sylvestris and Pinus sp.), other associated organisms (Cladosporium cladosporioides and Sclerophoma pithiophila [Sydowia polyspora]), diagnostic features, biology and conservation status.

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