Pythium acanthophoron. [Descriptions of Fungi and Bacteria].

Author(s):  
G. Hall

Abstract A description is provided for Pythium acanthophoron. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Ananas sativus, Brassica chinensis, Cicer arietinum, Daucus carota, Eucalyptus regnans, Gossypium sp., Larix sp., Lolium perenne, Phaseolus vulgaris, Pinus sp., Trifolium subterraneum. In artificial infections: Absidia glauca, Basidiobolus ranarum, Entomophthora coronata, Fusarium solani, Mucor hiemalis, Pythium myriotylum. Also in soil around ginger and bedding plants, and in sand dunes. DISEASE: Leaf rot of pineapple, root rot of beans (61, 3765), and a range of other non-specific root rots, although the fungus seems only weakly pathogenic to most plant hosts; a facultatively necrotrophic plant pathogen and also a mycoparasite. It seems to have a more important role as a mycoparasite, particularly of Zygomycetes, and may be present around roots, parasitizing root infecting fungi. GEOGRAPHICAL DISTRIBUTION: Asia; China (Guangdong), India, Japan, Philippines. Australasia & Oceania; Australia (Vic., WA). Europe; UK (Scotland, Wales). North America; USA (Hl). TRANSMISSION: Presumably by mycelial growth in moist infected soils. Oospores and zoosporangia have been shown to survive in soil rather than in plant debris (62, 802), and serve as perennating structures. Oospores may be dispersed by wind from dry soil.

Author(s):  
D. Jean Stamps

Abstract A description is provided for Phytophthora cryptogea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On a wide range of glasshouse and field crops. Tomato, ornamentals (including petunia, aster, chrysanthemum, Tagetes, tulip, wallflower, Gerbera, gloxinia, Matthiola, Papaver, cineraria, dahlia, Gypsophila, Hebe, Rhododendron, Osteospermum, zinnia), potato, chicory, spinach, bean, onion, cucurbits, eggplant, hop, sunflower, safflower, lucerne, Cupressus, Chamaecyparis, chestnut and others. DISEASE: Damping-off and foot rot of tomato; foot rots of aster, Matthiola and Gerbera; black neck of chrysanthemum; tulip shanking; corm, stem and leaf rot of gloxinia; crown rot of Iceland poppy; pink rot of potato; sunflower stem rot; chestnut wilt; damping-off, root rots and wilts of many other hosts. GEOGRAPHICAL DISTRIBUTION: Europe (UK, Irish Republic, Austria, Czechoslovakia, Denmark, France, Germany, Greece, Italy, Netherlands); Africa (Egypt, Rhodesia); Asia (Iran); Australia; New Zealand; N. America (Canada, USA). (CMI Map 99, ed. 4, 1976). TRANSMISSION: Soil-borne, persisting for several years (6, 669). Tulip bulbs were invaded from the soil (18, 183). Movement of zoospores was studied (56, 1029). Isolates were obtained from glasshouse water supplies (1, 94). There was a high frequency of recovery on baiting irrigation water in Victoria (57, 2174).


Author(s):  
D. L. Hawksworth

Abstract A description is provided for Phialophora asteris. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aster novi-belgii cultivars (michaelmas daisy) and, more rarely, A. tradescantii. Cultivars of Callistephus chinensis are also very susceptible with A. amellus, A. linosyris and Bellis perennis moderately so; A. acris and A. novae-angliae appear to be resistant (Burge & Isaac, 1974). DISEASE: Vascular wilt of michaelmas daisies, aster wilt. GEOGRAPHICAL DISTRIBUTION: Europe (UK, Netherlands, Denmark); New Zealand. TRANSMISSION: Presumably by splash dispersed conidia and by infected plant debris in the soil.


Author(s):  
D. Brayford

Abstract A description is provided for Fusarium oxysporum f. sp. cubense. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Musa sp., Heliconia sp. DISEASE: Panama disease (vascular wilt) of banana. Also vascular wilt of abaca (Musa textilis). GEOGRAPHICAL DISTRIBUTION: Widespread in tropical and subtropical regions. Africa: Burundi, Cameroun, Canary Is., Ghana, Kenya, Madagascar, Malawi, Mauritius, Mozambique (50, 3049), Nigeria, Republic of South Africa, Rwanda, Sierra Leone, Tanzania (incl. Zanzibar), Uganda, Zaire. America: North: Florida (68, 905); South: Brazil, Costa Rica, Cuba (56, 4615), Dominica, Guadeloupe, Jamaica. Australasia: Australia, Brunei (51, 3059), Guam (60, 3258), India (68, 5699; 69, 657), Indonesia, Philippines, Sri Lanka, Taiwan, Thailand. IMI Distribution Map 31. TRANSMISSION: Through human transportation of infected planting material, plant debris or soil.


Author(s):  
C. Booth

Abstract A description is provided for Pleospora bjorlingii[Pleospora betae]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Beta spp. DISEASE: Black leg of sugar beet and mangold. Also root rot and leaf rot or heart rot (45, 1243), storage decay (41: 188) and clamp rots (45, 2655). GEOGRAPHICAL DISTRIBUTION: Africa (north & south); Asia, Australasia, Europe, N. America. (CMI Map 427, Ed. 1, 1967). TRANSMISSION: On seeds and in decayed host material or soil.


Author(s):  
A. K. Sarbhoy

Abstract A description is provided for Rhizopus microsporus. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: In soil and plant debris, also pathogenic for animals (causing mycoses). DISEASES: Man and Animals. A cause of phycomycosis (syn. 'mucormycosis') in man; see Neame & Rayner (RMVM 4, 882). On the horse, swine (generalized infection) and bovine fetus (fide Dodge (1936, p. 115) as R. equinus) and gastric infection in the pig (Gitter & Austwick, Vet. Rec. 71: 6-11, 1959). GEOGRAPHICAL DISTRIBUTION: European countries and South Africa. TRANSMISSION: By air-borne sporangiospores.


Author(s):  
E. Punithalingam

Abstract A description is provided for Ascochyta desmazieresii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lolium multiflorum and L. perenne. DISEASE: Glume and leaf spot of Italian and perennial ryegrasses. At first leaf lesions start as small purplish or chocolate-brown spots with a distinct red-purple margin. With time these enlarge, become irregular or elliptical, up to 5 mm long and distinctly visible on both sides of the leaves. Finally the centres of older lesions fade to fawn to straw yellow with numerous pycnidia immersed within the leaf tissue on both sides of the leaves but usually abundant pycnidia occur on the lower side. GEOGRAPHICAL DISTRIBUTION: Asia (Japan); Europe (Belgium, Czechoslovakia, Denmark, France, Irish Republic, UK); N. America (USA, California, Oregon, Washington); S. America (Chile, Brazil). TRANSMISSION: No specific studies reported; infection is presumably spread by air-borne conidia in wet weather or heavy dews. The fungus is also probably carried over on crop residues and debris in soil.


Author(s):  
T. V. Andrianova

Abstract A description is provided for Septoria antirrhini. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot, leaf drying, defoliation. HOSTS: Antirrhinum antirrhiniflorum, A. majus, A. siculum (Scrophulariaceae). GEOGRAPHICAL DISTRIBUTION: AFRICA: South Africa. NORTH AMERICA: Canada, USA. SOUTH AMERICA: Chile, Colombia. ASIA: Armenia, Azerbaijan, China, Iran, Israel. AUSTRALASIA: Australia, New Zealand. EUROPE: Bulgaria, Czech Republic, Estonia, France, Germany, Great Britain, Hungary, Ireland, Italy, Netherlands, Portugal, Romania, Ukraine, former Yugoslavia. TRANSMISSION: Not reported, but almost certainly by airborne, splash-dispersed conidia from infected plant debris and seed stocks. The disease is significantly more severe under wet weather conditions (SINADSKIY et al., 1985).


2021 ◽  
Author(s):  

Abstract C. pseudonaviculata is an asexual species in a genus of common ascomycete plant pathogens. It was identified relatively recently in the UK, as an introduced species causing a devastating shoot blight of boxwood [Buxus spp.] plants that are commonly used in gardens and landscaping. The full extent of its host range is not known, but Buxus spp. from different continents were found to be susceptible (Henricot et al., 2008). It was placed on the EPPO Alert list in 2004, as it appeared to be spreading to the mainland (EPPO, 2009a), and removed from the list in 2008. This pathogen has been reported from additional European countries in recent years, and may have been transported in asymptomatic infected plants or propagating materials. It survives well in plant debris and probably also in soil.


2014 ◽  
Vol 37 (1-2) ◽  
pp. 39-62 ◽  
Author(s):  
Janusz Błaszkowski ◽  
Iwona Adamska ◽  
Beata Czerniawska

The occurrence of arbuscular mycorrhizal fungi (AMF) of the, phylum <i>Glomeromycota</i> associated with plants of maritime sand dunes of the Vistula Bar localed in north-eastern Poland was investigated. The presence of AMF was revealed based on spores isolated from field-collected root-rhizosphere soil mixtures and two-cycle pot trap cultures established with parts of these mixtures. The mixtures came from under five species in four plant families. Spores of AMF occurred in 54.8% of the field samples and belonged to eight species. Additionally, culturing of root-soil mixtures in trap cultures revealed nine species and three undescribed morphotypes carlier not found in the field samples. Considering the number of records of species and morphotypes in the field samples and trap cultures, the fungal species most frequently occurring in dunes of the Vistula Bar is <i>Scutellospora dipurpurescens</i>, followed by <i>Archaeospora trappei, Glomus laccatum</i>, and <i>Scu. armeniaca</i>. The overall average spore abundance in the field samples is low (4.48, range O-3l in 100g dry soil). The ovcrall average species richness determined based on spores from both the field and trap cultures was 2 l and ranged from 0 lo 7 in 100g dry soil. The plant harbouring the highest number of species of AMF was <i>Festuca rubra</i>. Of the maritime dune sites of Poland examined to date, the species composition of AMF of the Vistula Bar is most similar to that of the Słowiński National Park. When the comparisons included 15 maritime dune areas located outside Poland, the highest similarity occurred in the Vistula Bar/Canada comparison.


Author(s):  
E. V. Bogomolova

Abstract A description is provided for Monodictys levis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: A typical soil species also occurring on rocks. With other rock-inhabiting fungi it can deteriorate stone monuments and art objects. HOSTS: Isolated from air, dead wood, herbaceous stems, damp sacking, feathers, plaster, soil (including contaminated soil from spoil heaps), from calcareous rock (marble and limestone), and as a laboratory contaminant. Associated organisms include: Avena sp., Beta vulgaris, Betula sp. (fence post), Cervidae (dung), Eucalyptus tereticornis (leaf), Eucalyptus sp. (seed), Fagus sylvatica (cupule, leaf), Fragaria sp. (root), Humulus lupulus (dry flower), Phaseolus vulgaris, Picea abies, Ricinus communis, Rodentia (dung), Salix sp. and Solanum tuberosum. GEOGRAPHICAL DISTRIBUTION: NORTH AMERICA: Canada (British Columbia). ASIA: India (Kerala), Russia (Russian Far East). AUSTRALASIA: Australia, New Zealand. EUROPE: Belgium, Great Britain, Greece, Russia, Ukraine. TRANSMISSION: By air-borne dissemination of propagules, or through the soil.


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