Naemacyclus fimbriatus. [Descriptions of Fungi and Bacteria].

Author(s):  
D. W. Minter

Abstract A description is provided for Naemacyclus fimbriatus. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: VUJANOVIĆ, ST-ARNAUD & NEUMANN (1998) have provided the only report suggesting that Naemacyclus fimbriatus can cause infections of living needles of Pinus species. They observed chlorotic and necrotic second- and third-year needles of Pinus rigida bearing ascomata identified as this species. The fungus was successfully isolated into pure culture from those needles, and from dead fallen cones, presumably of the same pine. They speculated that 'unfavourable conditions such as the more than 200 days with frost and thin organic or mineral soil layer may predispose pitch pine to infection by this fungus'. The apparent absence of this fungus from higher latitudes in Europe noted below seems, at first sight, incompatible with this observation. HOSTS: Pinus brutia, P. halepensis, P. maritima, P. nigra var. maritima, P. nigra var. pallasiana, P. nigra, P. pinaster, P. resinosa, P. rigida, P. sylvestris, P. sylvestris subsp. kochiana, P. taeda, P. uncinata, P. virginiana, Pinus sp. (bark, cones, cone scales and leaves). GEOGRAPHICAL DISTRIBUTION: NORTH AMERICA: Canada (Québec), USA (Georgia, Massachusetts, Pennsylvania). EUROPE: Austria, Czech Republic, France, Republic of Georgia, Greece, Hungary, Netherlands, Poland, Spain, Switzerland, UK, Ukraine. TRANSMISSION: Not known. Presumably by air-borne ascospores released in humid conditions. VUJANOVIĆ, ST-ARNAUD & NEUMANN (1998) reported that Naemacyclus fimbriatus produces 1-3 brown mycelial cords, 50-100 μm diam., which grow through the litter from ascomata in autumn. They were unable to explain the nature of these cords, which have never been observed by the present author. In two species of fungi inhabiting living conifer leaves (Didymascella thujina, IMI Descriptions No. 1334 and Rhabdocline pseudotsugae, IMI Descriptions No. 651, both possibly members of the Rhytismatales), ascospores have been observed to germinate while still inside the ascus and it is possible that hyphae resulting from these germ tubes may grow out of the ascoma and cause further infections. Those two species are, however, undoubtedly rather distant from Naemacyclus fimbriatus and their germination, in any case, is always associated with a darkening of one cell of the ascospore, a phenomenon not reported by VUJANOVIĆ, ST-ARNAUD & NEUMANN (1998). The mycelial cords they observed therefore remain unexplained.

Plant Disease ◽  
1998 ◽  
Vol 82 (8) ◽  
pp. 959-959 ◽  
Author(s):  
Vladimir Vujanovic ◽  
Marc St.-Arnaud ◽  
Peterjürgen Neumann

This is the first report of Naemacyclus fimbriatus (Schwein.) DiCosmo, Peredo & Minter (Rhytismatales) on Pinus rigida, and the first observation of this fungus infecting living needles. N. fimbriatus is known to occur on cone scales of P. brucia, P. halepensis, P. nigra, P. resinosa, and P. sylvestris, as well as fallen needles of P. maritima and P. pinaster, in Europe and North America (1). In September 1997, chlorotic and necrotic second- and third-year needles of pitch pine were observed to have ascomata fruiting bodies that were amphigenous, dark brown to black, immersed to erumpent, circular to subcircular, and 200 to 500 × 150 to 250 μm in size. Asci were club-shaped, eight-spored, and 83 to 98× 8.9 to 9.7 μm. Mature ascospores were phragmo-scolecosporous, 7-septate, and 78 to 91 × 2 to 2.5 μm. From these symptomatic needles, N. fimbriatus was frequently (>70%) isolated on 2% malt agar. In October 1997, fruiting bodies were also observed on dead fallen cones. During the autumn, the fungus produced 1 to 3 brown mycelial cords, 50 to 100 μm in diameter, which grew throughout the litter from the ascomata. The nature of the cords is still unknown. Pitch pine is rare in Québec, and this northernmost population is located about 10 km north of New York State, in the St. Lawrence Valley of Québec. We found that pitch pine was colonized by the fungus in a wide range of edaphic conditions, but more frequently on dry rock outcrops. We believe that unfavorable conditions such as the more than 200 days with frost and thin organic or mineral soil layer may predispose pitch pine to infection by this fungus. Reference: (1) F. Di Cosmo et al. Mycotaxon 21:1, 1984.


Author(s):  
V. P. Heluta

Abstract A description is provided for Arthrocladiella mougeotii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Powdery mildew of Lycium species only. The mycelium, conidiophores, conidia and ascomata form first white, then dirty-grey patches on damaged green parts of the host. Infected parts are deformed slightly and, in cases of high infection, plants can lose their ornamental qualities. Damaged leaves can fall prematurely. HOSTS: Lycium barbarum (= L. europaeum), L. chinense, L. dasystemum, L. halimifolium, L. ovatum, L. potaninii, L. rhombifolium, L. ruthenicum. [Type host - Lycium barbarum] GEOGRAPHICAL DISTRIBUTION: Africa: Canary Islands. Asia (temperate areas only): Armenia, Azerbaijan, China, Republic of Georgia, Israel, Japan, Kazakhstan, Kirghizistan, Korea, Russia (Russian far east), Tadzhikistan, Taiwan, Turkey, Turkmenistan, Uzbekistan. Australasia: New Zealand (introduced). Europe: Austria, Belgium, Bulgaria, Czech Republic, Estonia, France, Germany, Hungary, Italy, Netherlands, Norway, Poland, Rumania, Slovakia, Sweden, Switzerland, UK, Ukraine (southern), former Yugoslavia. North America: USA (introduced). TRANSMISSION: By wind-dispersed conidia. The rôle of ascospores in disease transmission is unknown, although it has been supposed that they can cause the initial stage of the disease.


Author(s):  
V. P. Hayova

Abstract A description is provided for Leucostoma cinctum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leucostoma cinctum, especially in its conidial state, is a well-known pathogen of stone-fruit trees causing necrosis of twigs, perennial Cytospora-canker. The fungus penetrates mainly through the scars, and may result in dieback of branches or even whole trees. Tree susceptibility to L. cinctum is influenced by lesions (Stanova, 1990). Comparative anatomy and host response of peach cultivars inoculated with L. cinctum was studied by Biggs (1986). Resistance of different cultivars of stone-fruit trees to L cinctum has been investigated by many authors (Cociu et al., 1991; Miles et al., 1989; Pedryc & Rozsnyai, 1991). HOSTS: On dead or dying, attached or fallen twigs of the Rosaceae, mainly Prunoideae (Amygdalus, Armeniaca, Cerasus, Persica, Prunus) and rarely other subfamilies of the Rosaceae, including genera such as Cotoneaster, Crataegus, Malus and Pyrus. GEOGRAPHICAL DISTRIBUTION: Asia: Armenia, Republic of Georgia, Iran, Kazakhstan, Russia, Turkmenistan, Uzbekistan. Australasia: Australia. Europe: Czech Republic, France, Germany, Hungary, Italy, Moldova, Rumania, Russia, Slovakia, Spain, Switzerland, Sweden, Turkey, UK, Ukraine, former Yugoslavia. North America: Canada, USA (Idaho, Michigan, New-Jersey, Oregon). TRANSMISSION: Both conidia and ascospores are air-borne, especially under humid conditions. Orange or reddish droplets or tendrils of conidia extruded from conidiomata can be often seen after rain. It is also known that arthropods can carry propagules in stone-fruit orchards (Helton et al., 1988).


Author(s):  
V. P. Hayova

Abstract A description is provided for Valsa malicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Valsa malicola is associated with dieback of Malus twigs, especially weakened by other factors, for example when frozen, burnt, wounded, injured by insects or attacked by other pathogens. HOSTS: On dead or dying twigs of Malus species, and other Maloideae (Cotoneaster, Crataegus, Cydonia, Pyracantha, Pyrus, Rosa). The fungus can also be found on other members of the Rosaceae (e.g. Prunus), but only infrequently, and mainly as the anamorph. GEOGRAPHICAL DISTRIBUTION: Asia: Armenia, Azerbaijan, China, Republic of Georgia, Kazakhstan, Russia. Europe: Austria, Czech Republic, Germany, Italy, Latvia, Lithuania, Portugal, Rumania, Russia, Slovakia, Sweden, Switzerland, UK, Ukraine. North America. TRANSMISSION: Both conidia and ascospores are air-borne, especially under humid conditions. Brightly coloured droplets or tendrils of conidia are often exuded from conidiomata after rain.


Author(s):  
V. P. Hayova

Abstract A description is provided for Diplodia rosarum, which has been implicated in canker or dieback of cultivated roses. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (USA (California, Massachusetts, New York, Ohio, South Carolina, Texas), Brazil, Azerbaijan, Republic of Georgia, India, (Delhi, Uttar Pradesh, West Bengal), Kyrgyzstan, Pakistan, Cuba, Belgium, Bosnia-Hercegovina, Bulgaria, Czech Republic, Denmark, Estonia, France, Germany, Greece, Irish Republic, Italy, Moldova, Netherlands, Poland, Portugal, Romania, Russia, Slovakia, Sweden, Ukraine and UK), hosts (Rosa arvensis, R. banksiana, R. canina, R. centifolia, R. corymbifera, R. hybrida, R. multiflora, R. spinosissima, R. tomentosa, R. willmottiae and Rosa sp.) and associated fungi (Botryotinia fuckeliana, Hendersonula sp., Macrophoma camarana, Microdiplodia rosarum, Coniothyrium olivaceum, Pleospora herbarum f. microspora and Valsa ambiens).


Author(s):  

Abstract A new distribution map is provided for Cydalima perspectalis (Walker). Lepidoptera: Pyralidae. Hosts: Buxus spp. Information is given on the geographical distribution in Europe (Austria, Belgium, Bosnia-Hercegovina, Bulgaria, Croatia, Czech Republic, Denmark, France, Mainland France, Germany, Greece, Hungary, Italy, Mainland Italy, Sicily, Liechtenstein, Luxembourg, Montenegro, Netherlands, Poland, Romania, Russia, Far East, Southern Russia, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, UK, England and Wales and Ukraine) and Asia (China, Anhui, Chongqing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Henan, Hubei, Hunan, Jiangsu, Liaoning, Qinghai, Shaanxi, Shandong, Sichuan, Xizhang, Yunnan, Zhejiang, Republic of Georgia, Iran, Japan, Hokkaido, Honshu, Kyushu, Ryukyu Archipelago, Shikoku, Korea Republic and Turkey).


Author(s):  
D. W. Minter

Abstract A description is provided for Lophodermium maculare, which is not associated with any disease, and is only known from collections of ascomata fruiting on pale areas of dead leaves. Information is included on its geographical distribution (Canada (Northwest Territories), Greenland, Republic of Georgia, Russia, Belgium, Czech Republic, Finland, France, Germany, UK, Iceland, Norway, Sweden, Switzerland and Ukraine) and hosts (dead fruit and leaves of Vaccinium myrtilis [V. myrtillus] and V. uliginosum).


Author(s):  
T. V. Andrianova

Abstract A description is provided for Ramularia glechomatis, which sometimes causes severe damage to Glechoma spp. leaves. Some information is given on its interactions and habitats, economic impacts, dispersal and transmission and conservation status, along with its geographical distribution (Armenia, Azerbaijan, Republic of Georgia, Russia, Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Irish Republic, Italy, Latvia, Lithuania, Netherlands, Norway, Poland, Portugal, Romania, Russia, Serbia, Slovenia, Spain, Sweden, Switzerland, Ukraine and UK) and hosts (Glechoma hederacea, G. hederifolia, G. hirsuta and Glechoma sp.).


Author(s):  
T. V. Andrianova

Abstract A description is provided for Septoria hyperici. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot. HOSTS: Hypericum alpigenum, H. elodes, H. hirsutum, H. linearifolium, H. maculatum, H. montanum, H. perforatum, H. pulchrum, H. quadrangulum (syn. : H. tetrapterum), H. undulatum (Hypericaceae). [Type host - Hypericum perforatum.] GEOGRAPHICAL DISTRIBUTION: Asia: Republic of Georgia, India, Kazakhstan, Kirghizistan, Russia, Tadzhikistan, Uzbekistan. Europe: Belarus, Belgium, Bulgaria, Czech Republic, Denmark, Estonia, France, Germany, Ireland, Italy, Latvia, Lithuania, Moldova, Netherlands, Norway, Poland, Portugal, Romania, Russia, Sweden, UK, Ukraine. TRANSMISSION: Not reported, but almost certainly by air-borne or splash dispersed conidia.


Author(s):  
C. M. Denchev

Abstract A description is provided for Anthracoidea pratensis, which causes severe damage to Carex sp. Some information on its morphology, dispersal and transmission and conservation status are given, along with details of its geographical distribution (Republic of Georgia, Austria, Bulgaria, Czech Republic, Denmark, Estonia, Iceland, Italy, Finland, Germany, Hungary, Latvia, Lithuania, Norway, Poland, Romania, Slovenia, Spain, Sweden, Switzerland and UK) and host (C. flacca).


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