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Selection: with tag fungal-diseases [44 articles] 


Pest categorisation of Guignardia laricina

EFSA Journal, Vol. 16, No. 6. (June 2018), e05303,


Following a request from the European Commission, the EFSA Panel on Plant Health performed a pest categorisation of Guignardia laricina, a well‐defined and distinguishable fungal species of the family Phyllostictaceae. The pathogen is regulated in Council Directive 2000/29/EC (Annex IAI) as a harmful organism whose introduction into the EU is banned. G. laricina is native to East Asia and causes a shoot blight disease of Larix spp. Major hosts of G. laricina are European larch (Larix decidua) and two North American ...


Pest categorisation of Sphaerulina musiva

EFSA Journal, Vol. 16, No. 4. (April 2018), e05247,


Following a request from the European Commission, the EFSA Plant Health Panel performed a pest categorisation of Sphaerulina musiva, a well‐defined and distinguishable fungal species of the family Mycosphaerellaceae. Following a recent phylogenetic analysis of the genus Septoria and other closely related genera, a new name (S. musiva) was introduced for the species. The former species name Mycosphaerella populorum is used in the Council Directive 2000/29/EC. The pathogen is regulated in Annex IAI as a harmful organism whose introduction into the ...


Pest categorisation of Melampsora medusae

EFSA Journal, Vol. 16, No. 7. (July 2018), e05354,


Following a request from the European Commission, the EFSA Plant Health Panel performed a pest categorisation of Melampsora medusae, a well‐defined and distinguishable fungal species of the family Melampsoraceae. The pathogen is regulated in Annex IAI of Council Directive 2000/29/EC as a harmful organism whose introduction into the EU is banned. M. medusae is a heteroecious rust fungus with Populus spp. as primary telial hosts and various conifers (Larix, Pinus, Pseudotsuga, Abies, Picea and Tsuga spp.) as secondary aecial hosts. M. ...


Commission Implementing Regulation (EU) 2016/873 of 1 June 2016 amending Regulation (EC) No 690/2008 recognising protected zones exposed to particular plant health risks in the Community

Official Journal of the European Union, Vol. 59, No. L 145. (June 2016), pp. 10-17
Keywords: agricultural-resources   anthonomus-grandis   bemisia-tabaci   cephalcia-lariciphila   ceratocystis-platani   cryphonectria-parasitica   curtobacterium-flaccumfaciens   daktulosphaira-vitifoliae   dendroctonus-micans   dryocosmus-kuriphilus   eli-identifier   erwinia-amylovora   european-commission   european-union   forest-pests   forest-resources   fungal-diseases   gilpinia-hercyniae   globodera-pallida   globodera-rostochiensis   glomerella-gossypii   gonipterus-scutellatus   gremmeniella-abietina   hypoxylon-mammatum   ips-amitinus   ips-cembrae   ips-duplicatus   ips-sexdentatus   ips-typographus   legislation   leptinotarsa-decemlineata   liriomyza-bryoniae   paysandisia-archon   plant-diseases   plant-pests   protection   rhynchophorus-ferrugineus   sternochetus-mangiferae   thaumetopoea-pityocampa   thaumetopoea-processionea   tree-diseases   xanthomonas-arboricola  


[Excerpt] [:Article 1] Amendment of Regulation (EC) No 690/2008 [\n] Annex I to Regulation (EC) No 690/2008 is replaced by the text set out in the Annex to this Regulation. [:Article 2] Entry into force and application [\n] This Regulation shall enter into force on the day following that of its publication in the Official Journal of the European Union. It shall apply from 1 May 2016. [\n] [...] ...


Commission Regulation (EC) No 690/2008 of 4 July 2008 recognising protected zones exposed to particular plant health risks in the Community (Recast)

Official Journal of the European Union, Vol. 51, No. L 193. (July 2008), pp. 1-6


[Excerpt] [:Article 1] The zones in the Community listed in Annex I are recognised as protected zones within the meaning of the first subparagraph of Article 2(1)(h) of Directive 2000/29/EC, in respect of the harmful organism(s) listed against their names in Annex I to this Regulation. [:Article 2] Directive 2001/32/EC, as amended by the acts listed in Annex II, Part A, is repealed, without prejudice to the obligations of the Member States relating to the time-limits for transposition into national law and application of the ...


(INRMM-MiD internal record) List of keywords of the INRMM meta-information database - part 16

(February 2014)
Keywords: forest-management   forest-pathogens   forest-pests   forest-product   forest-regeneration   forest-reproductive-material   forest-resource-information   forest-resources   forest-species   forest-species-composition   forest-structure   forest-succession   forest-types   forest-watering   forestcommunities   forestry   forestry-statistics   fortran   foss   fossil-energy   fossil-resources   fp7-european-research-project   fracking   fractal   fragmentation   fragmented-world   frainetto   france   frangula-alnus   frangula-spp   fraxinus-angustifolia   fraxinus-augustifolia   fraxinus-excelsior   fraxinus-mandshurica   fraxinus-ornus   fraxinus-pennsylvanica   fraxinus-spp   free-access   free-access-book   free-riders   free-science-metrics   free-scientific-knowledge   free-scientific-software   free-software   free-software-directory   free-software-license-definition   freebsd   freedom   freemat   freeze-protection   french-alps   frequency   frost   frost-damage   frost-resistance   frost-sensitivity   fruticosa   fuel   fuel-moisture   fuelwood   functional-connectivity   functional-descriptors   functional-programming   functional-traits   funding   fungal-decay   fungal-diseases   fungi   fusarium-circinatum   fusarium-lateritium   future   future-climatic-envelopes   future-earth   future-fire-activity   future-internet   future-trends   fuzzy   gaia   galanthus-plicatus   galicia   gall-attributes   game-theory   garbage-in-garbage-out   gardening   gargano   garrulus-glandarius   gbif   gc-ms   gcm   gdal   gemmae-populi   gender-biases   gene-bank   gene-conservation   general-relation   generalized-additive-model   generalized-additive-models   generalized-linear-model   generalized-linear-models   inrmm-list-of-tags  


List of indexed keywords within the transdisciplinary set of domains which relate to the Integrated Natural Resources Modelling and Management (INRMM). In particular, the list of keywords maps the semantic tags in the INRMM Meta-information Database (INRMM-MiD). [\n] The INRMM-MiD records providing this list are accessible by the special tag: inrmm-list-of-tags ( ). ...


Sequence and simple-sequence repeat Aanalyses of the fungal pathogen Seiridium cardinale indicate California is the most likely source of the cypress canker epidemic for the Mediterranean region

Phytopathology, Vol. 101, No. 12. (December 2011), pp. 1408-1417,


Seiridium cardinale is the pathogenic fungus of unknown origin responsible for a world pandemic known as cypress canker affecting several species of Cupressaceae in both the Northern and Southern Hemisphere. In this study, a comparative genetic analysis of worldwide populations was performed using sequence analysis of a portion of the β-tubulin locus and seven polymorphic simple-sequence repeat (SSR) loci on 96 isolates. Sequence analysis identified two distinct β-tubulin alleles, both present in California. Only one of the two alleles was detected ...


Die Petrakia-Blattbräune des Bergahorns

Forstschutz Aktuell, Vol. 40 (2007), pp. 28-31


Petrakia Leaf Blotch of Sycamore Maple The anamorphic fungus Petrakia echinata was identified as causal agent of a leaf blotch disease of sycamore maple (Acer pseudoplatanus) trees at two localities in Austria between 2003 and 2004. Although this fungus has been known as leaf pathogen on sycamore maple for a long time, it is not mentioned in reference books of forest pathology in Europe. The characteristics of Petrakia echinata and the disease caused by this fungus are therefore described and illustrated. ...


First report of Eutypella canker of Acer pseudoplatanus in Europe

New Disease Reports, Vol. 12 (2005)


At the end of May 2005 distinctive oval bark lesions were found on the trunks of Acer pseudoplatanus (sycamore) on Rožnik Hill in the centre of Ljubljana; the capital of Slovenia. A characteristic feature of the cankers was that the bark remained in place except at the centre (the oldest part). The cankers were located mostly on the lower portions of the trunks. Intensive surveys around Rožnik Hill revealed a further 19 affected trees by the end of June. The disease ...


Asteroma pseudoplatani n.spec., Anamorphe zu Pleuroceras pseudoplatani (v. TUBEUF) MONOD.

Sydowia, Vol. 40 (1987), pp. 38-41


In 1986 and 1987 a widespread leaf blotch disease of maple (Acer pseudoplatanus) occurrediin Central Europe. The symptoms of this disease, caused by Pleuroceras pseudoplatani, are described. The nature of the fungus in pure culture is presented. A newly found fructification structure, appearing on veins in the leaf blotches, is described as Asteroma pseudoplatani sp. nov.. The spores produced in these anamorph, apparently with the function of spermatia, enable a reliable, quick identification of the disease, formerly only possible by the ...


Attacchi di Cryphonectria parasitica (Murr.) Barr. su differenti ospiti nel Cilento.

Monti e Boschi, Vol. 42, No. 5. (1991), pp. 54-58


In alcuni popolamenti misti localizzati nel Cilento (SA) sono stati rilevati attacchi di Cryphonectria parasitica per la prima volta su Ostrya car-pinifolia nonché su Alnus cordata, Castanea sativa, Quercus ilex e Q. pubescens. Gli altri ospiti sono risultati suscettibili alla malattia che però non vi ha causato danni cosi gravi come quelli verificatisi sui castagni. Da leccio, roverella, ontano napoletano e carpino nero sono stati ottenuti soltanto isolati V del parassita e in grado di produrre periteci in laboratorio. I popolamenti ...


Diversity and pathogenicity of Botryosphaeriaceae on declining Ostrya carpinifolia in Slovenia and Italy following extreme weather conditions

European Journal of Forest Research In European Journal of Forest Research, Vol. 130, No. 2. (26 August 2011), pp. 235-249,


Unusual and extensive dieback of European hop hornbeam (Ostrya carpinifolia) has been observed in western Slovenia and northern Italy in recent years, when extreme drought and higher temperatures were recorded. A preliminary study identified Botryosphaeria dothidea as a potential causative agent of the dieback. Further characterization of intra- and interspecies diversity of Botryosphaeriaceae collected from O. carpinifolia and other tree species in the affected area was achieved based on anamorph morphology, sequence data from the ITS rDNA and EF1-α, PCRâRFLP analysis ...


Casi di cancro osservati su Ostrya carpinifolia Scop. in Sicilia

Il Naturalista siciliano, Vol. 10 (1987), pp. 107-108

Patologija: šumskog i ukrasnog drveća


Impact of root-rot pathogens on forest succession in unmanaged Pinus mugo stands in the Central Alps

Canadian Journal of Forest Research, Vol. 36, No. 10. (1 October 2006), pp. 2666-2674,


In the mountain pine (Pinus mugo subsp. uncinata (DC.) Domin) forests of the Swiss National Park in the Central Alps, disease centers associated with the root-rot fungi Heterobasidion annosum (Fr.) Bref. and Armillaria spp. are characteristic elements. We assessed the impact of these pathogens on forest dynamics by studying transects running across disease centers into the adjacent forest. Overall, mountain pine was the most abundant regenerating tree species and accounted for 84% of all seedlings (<20?cm high) and 93% of all ...


Phytophthora ilicis as a leaf and stem pathogen of Ilex aquifolium in Mediterranean islands

Phytopathologia Mediterranea, Vol. 53, No. 3. (2014), pp. 480-490


Between 2010 and 2013 several English holly trees showing defoliation, leaf and twig blight were found in natural ecosystems in Sardinia and Corsica. A Phytophthora species was consistently isolated from necrotic tissues of leaves and twigs, and bleeding cankers on stems. Isolates obtained were identified as Phytophthora ilicis, on the basis of morphological features, colony patterns and growth rates at different temperatures. Identity was confirmed by sequence analyses of the ITS, β-tubulin and cox1 gene regions. Two different genotypes within P. ...


First report of Phytophthora ilicis causing twig blight on holly in Spain

New Disease Reports, Vol. 26 (05 November 2012), 16,


[Excerpt] During Phytophthora ramorum monitoring surveys at nurseries, parks and public gardens, a range of ornamental plants susceptible to infection with Phytophthora were extensively surveyed. In 2011, during these surveys in Santiago de Compostela (Galicia, NW Spain), several holly plants (Ilex aquifolium) were observed exhibiting black leaf spots, defoliation, twig blight, cankers and shoot dieback. Excised tissue from the leading edge of lesions on twigs and stems was plated on V8 agar semi-selective medium (Erwin & Ribeiro, 1996) and incubated ...


A synopsis of Phytophthora with accurate scientific names, host range, and geographic distribution

Plant Health Progress (2008),


The genus Phytophthora includes species causing diseases such as late blight of potatoes, Phytophthora infestans, and sudden oak death and ramorum blight, P. ramorum. Because of the importance of diseases caused by Phytophthora, there is a need to have rapid access to the literature using their scientific names. The literature has been reviewed for all names in Phytophthora in order to provide the scientific name of each accepted species with authors and synonyms as well as the plant host range and ...


Anemone-Rosaceae Rust - Ochropsora ariae



Fact sheets have been prepared for plant-associated fungi of importance to plant quarantine. Many of these fact sheets were written in response to specific queries for nomenclatural information, from USDA APHIS or other interested parties. Each fact sheet provides nomenclature reports and supporting details about geographic distribution and host range for a fungus or group of related fungi. ...


Taxonomic implications of life cycle and basidium morphology of Ochropsora ariae and O. nambuana (Uredinales)

Mycoscience, Vol. 47, No. 3. (June 2006), pp. 145-151,


Ochropsora ariae was found to host-alternate between Anemone pseudo-altaica and Aruncus dioicus var. tenuifolius and Ochropsora nambuana between Anemone flaccida and Elaeagnus multiflora var. hortensis in Japan. Both species produced a sessile, thin-walled, cylindrical probasidium (teliospore), which turned into a four-celled metabasidium by continuous apical elongation of the probasidium. Several probasidia of O. nambuana were produced from a basal basidiogenous cell in a sorus hymenium. Life cycle and probasidium/metabasidium morphology showed the taxonomic identity of Ceraceopsora elaeagni with O. nambuana. Developmental ...


Inonotus rickii (Pat.) Reid: an important legnicolous basidiomycete in urban trees

Revista de Ciências Agrárias, Vol. 31, No. 2. (2008), pp. 159-167


Inonotus rickii is a basidiomycete that causes cankers and decay in several ornamental trees, and has been reported in Portugal since 2002. The aim of the present work was to evaluate the incidence of the disease caused by I. rickii on Celtis australis, in the community of Alcântara, Lisbon, where the European hackberry tree is the main sidewalk species. Disease incidence reached 19%, and affected trees showed sparse foliage, death of branches and white rot of heartwood. In some cases, chlamydospores ...


Characterization of Italian isolates of Inonotus rickii

Phytopathologia Mediterranea, Vol. 49, No. 3. (2011)


Thirty-seven isolates of Inonotus rickii, a pathogenic fungus causing white rot and cankers, were collected from diseased boxelder trees lining boulevards in Rome and from other hosts in Rome and Sicily. During the survey, it was observed that this fungus occasionally produced basidiomes, but more frequently it had anamorphic structures that released a brown powdery mass of chlamydospores, presumably acting as asexual propagules. All isolates were characterized using random amplified microsatellite analysis and somatic incompatibility tests in order to investigate the ...


First Report of Phytophthora megasperma Causing Decline and Death on Celtis australis in Italy

Plant Disease, Vol. 99, No. 1. (January 2015), pp. 155-155,

Decay and canker caused by Inonotus rickii spreading on more urban tree species

Forest Pathology, Vol. 33, No. 6. (December 2003), pp. 405-412,


Inonotus rickii was detected for the first time causing cankers and decay in Acer negundo and Celtis australis in Italy. In a boxelder boulevard, declining trees showed sparse foliage, exudations and cracks in the bark; in some cases, chlamydospore masses were present. Five isolates were collected and compared by growth tests in vitro and electrophoretic analyses; three isolates from the same boulevard showed very similar physiological characters. The increasing importance of the pathogen in urban areas is underlined and discussed. ...


First report of Colletotrichum acutatum and C. gloeosporioides causing leaf spots of olives (Olea europaea) in Australia

Australasian Plant Disease Notes, Vol. 3, No. 1. (2008), pp. 143-144


We report the occurrence of Colletotrichum acutatum and C. gloeosporioides on leaves of olives (Olea europaea) for the first time in Australia. ...


Verticillium wilt of olive and its control: The heat is on

Plant and Soil In Plant and Soil, Vol. 355, No. 1-2. (30 December 2012), pp. 17-21,


Plant and Soil recently published a comprehensive and critical Marschner review about Verticillium wilt (López-Escudero and Mercado-Blanco 2011), one of the most threatening biotic constraints for olive (Olea europaea L.) production. The authors reviewed research efforts aimed to understand the diversity of the causal agent (the soil-borne fungus Verticillium dahliae), the mechanisms underlying the interaction between the host plant and the pathogen, and the range of factors contributing to this disease becoming a major phytopathological problem in many traditional olive-growing areas. ...


Spread of levan-positive populations of Pseudomonas savastanoi pv. savastanoi, the causal agent of olive knot, in central Italy

European Journal of Plant Pathology In European Journal of Plant Pathology, Vol. 112, No. 2. (June 2005), pp. 101-112,


Pseudomonas savastanoi pv. savastanoi, the causal agent of olive knot disease, has for a long time been included in subgroup 1b of phytopathogenic, fluorescent Pseudomonas species by the LOPAT determinative tests (production of levan, oxidase, pectinolytic and arginine dihydrolase activity, tobacco hypersensitivity). Pseudomonas savastanoi pv. savastanoi differs from the Pseudomonads in subgroup 1a only in being levan-negative. However, in 1990, during a survey on the spread of olive knot in Tuscany, levan-positive isolates of P. savastanoi pv. savastanoi were isolated from ...


European oak powdery mildew: impact on trees, effects of environmental factors, and potential effects of climate change

Annals of Forest Science, Vol. 71, No. 6. (2014), pp. 633-642,


[Context] Powdery mildew is one of the most common diseases of oaks in Europe. After alarming reports in the beginning of the twentieth century following the presumed introduction of the invasive fungus, the disease has become familiar to foresters. However, its impact may vary greatly according to intrinsic and extrinsic factors. [Aims] We aimed at providing updated and synthesised information on the impact of powdery mildew on oak and on the effects of environment on disease. [Methods] A comprehensive ...


Brenneria quercina and Serratia spp. isolated from Spanish oak trees: molecular characterization and development of PCR primers

Plant Pathology, Vol. 57, No. 2. (April 2008), pp. 308-319,


Brenneria quercina has been reported as one of the causal agents of oak decline in Spain. To investigate the bacterial variability of this pathogen from different Spanish oak forests, a collection of 38 bacterial isolates from seven geographic locations and from different oak species was analysed by sequencing 16S rDNA and rep-PCR fingerprinting. All Spanish isolates of B. quercina were grouped by rep-PCR into a homogenous cluster that differed significantly from B. quercina reference strains from California. 16S rDNA analysis revealed ...


Molecular systematics of the dimorphic ascomycete genus Taphrina

International Journal of Systematic and Evolutionary Microbiology, Vol. 53, No. 2. (01 March 2003), pp. 607-616,


The ascomycete genus Taphrina Fries comprises nearly 100 species recognized by their mycelial states when parasitic on different vascular plants. Whereas the filamentous state is strictly phytoparasitic, the yeast state is saprobic and can be cultured on artificial media. Taphrina species are differentiated mainly on the basis of host range and geographical distribution, type and site of infection and morphology of the sexual stage in infected tissue. However, there has been little progress in the systematics of the genus in recent years, ...


Endophytic fungi in Quercus cerris: isolation frequency in relation to phenological phase, tree health and the organ affected

Phytopathologia Mediterranea, Vol. 40 (2001), pp. 165-171


The isolation frequency of endophytic fungi in Quercus cerris was determined in relation to sampling data, the health state of the tree, and the tree organ affected. Sampling was carried out at three times, in April (budbreak), June (full vegetation) and October (leaf fall), on trees that were either healthy or in decline, and on three organs: current-year twigs, with a diameter less than 2 cm, buds, and leaves. The experiment was done in an approximately 20-year-old oak forest at an ...


Fungal endophytes in Mediterranean oak forests: a lesson from Discula quercina

Phytopathology, Vol. 98, No. 4. (April 2008), pp. 380-386,


Fungal endophytes that colonize forest trees are widespread, but they are less well known than endophytes infecting grasses. The few studies on endophytes in trees mainly concern the tropical areas and the northernmost latitudes, while similar investigations in the Mediterranean region have so far been scarce and incidental. Endophytes are studied mostly in economically important forests suffering from diseases, such as oak forests. One common endophyte that has received some study on oak is the mitosporic Discula quercina. This paper, after ...


L’orniello (Fraxinus ornus): nuovo ospite di Diplodia mutila

Informatore Fitopatologico, Vol. 2 (2004), pp. 49-51


This note reports the first observation of Diplodia mutila on spontaneous manna ash (Fraxinus ornus). The symptoms of the disease were cankers, bark necrosis and crown drying up. Artificial inoculations revealed the pathogenicity of the fungal species. At present the localised diffusion of the disease does not seem to threaten manna ash in the Mt. Etna area. ...


The complex of Diplodia species associated with Fraxinus and some other woody hosts in Italy and Portugal

Fungal Diversity, Vol. 67, No. 1. (January 2014), pp. 143-156,


Studies on the taxonomy and phylogeny of Diplodia have been hampered by the lack of an ex-type culture linked to the holotype of D. mutila, which is the type of the genus. In this study a large collection of Diplodia strains, obtained from ash and other woody hosts showing V-shaped cankers and branch dieback, were identified based on morphological characters and DNA sequence data from ITS and EF1-α loci. Results of combined morphological and phylogenetic analyses showed that the Fraxinus isolates ...


The ash dieback pathogen Hymenoscyphus pseudoalbidus is associated with leaf symptoms on ash species (Fraxinus spp)

Journal of Agricultural Extension and Rural Development, Vol. 4, No. 9. (May 2012), pp. 261-265,


Ash dieback caused by the ascomycete fungus Hymenoscyphus pseudoalbidus (anamorph Chalara fraxinea) is characterized by a wide range of symptoms. Leaf symptoms have previously been related to this emerging infectious disease. In fungal isolations from necrotic lesions on leaf petioles and rachises as well as leaflet veins of Fraxinus excelsior, H. pseudoalbidus was consistently obtained at high frequencies. When inoculated onto leaf rachises of F. excelsior, the ash dieback pathogen induced symptoms identical to those seen after natural infections (necrotic lesions, ...


The current situation of ash dieback caused by Chalara fraxinea in Austria

SDU Faculty of Forestry Journal In Proceedings of the Conference of IUFRO Working Party 7.02.02, 11-16 May 2009, Eğirdir, Turkey (2009), pp. 97-119


In many parts of Europe common ash, Fraxinus excelsior, is presently affected by a serious dieback of shoots, twigs and branches, causing decline and mortality of trees of all age classes. Initially thought to be primarily incited by abiotic damaging factors, accumulating evidence suggests that ash dieback is a new infectious disease caused by the hyphomycete Chalara fraxinea and its teleomorphic state, Hymenoscyphus albidus. In Austria, ash dieback was first observed in 2005 and in 2008 it occurred in all Austrian ...


Zum Pilzbefall an Speierling und Elsbeere

Corminaria, Vol. 17 (May 2002), pp. 24-25

Physiologic specialization in Puccinia coronata avenae

Vol. 433 (1935)

Host-pathogen relationship between Salix and Melampsora sheds light on the parentage of some biomass willows

New Phytologist, Vol. 141, No. 1. (January 1999), pp. 155-160,


The association between willow (Salix) and rust (Melampsora) is highly specific. Willows named Salix burjatica, S. dasyclados (S.×dasyclados) and S.×calodendron are important in renewable-energy plantations in the UK and western Europe. There has been much controversy over their origin, species status and nomenclature. It has been suggested that they have originated from hybridization between. S. caprea, S. viminalis and S. cinerea. In the present work, 59 willow clones were investigated through morphological examination and detached leaf inoculation using willow differentials, for ...


Melampsora rust species on biomass willows in central and north-eastern Germany

Fungal Biology, Vol. 118, No. 11. (November 2014), pp. 910-923,


Melampsora willow rusts are the most important fungal pathogens in short rotation coppices of biomass willows. In the past, breeding programmes for rust resistant biomass willows concentrated on the distinction of races within the forma specialis Melampsora larici-epitea f. sp. larici-epitea typica that colonized Salix viminalis and related clones. In a new breeding program that is based on a wider range of willow species it is necessary to identify further Melampsora species and formae specialis that are pathogens of willow species ...


Enhancement of Sphaeropsis sapinea stem invasion of pines by water deficits.

Plant Disease, Vol. 69, No. 9. (1985), pp. 798-799


Three-year-old trees of 3 Pinus spp. growing in a loamy clay soil were inoculated with Sphaeropsis sapinea. Water was withheld for periods sufficient to create soil water potentials of -0.1, -0.6 to -0.8 and -1.2 to -1.5 MPa. Increasingly negative soil water potentials promoted greater linear fungal growth in stems. P. sylvestris and P. nigra were more susceptible than P. thunbergiana, although fungal growth within stems of this normally resistant sp. was extensive. The findings support field observations of increased infection ...


Role of Lophodermella species in premature death of Pine needles in Scotland

In Report on Forest Research (1970), pp. 176-178


Premature browning and death of the current year's needles of Pinus nigra var. calabrica and P. sylvestris was studied in two Scottish forests. The primary cause of the damage proved to be the fungus Lophodermella (Hypodermella) sulcigena, which enters at the base of the current year's needles. Control by fungicides is complicated by the fact that new infection sites (needle bases) are available throughout the sporing season. L. conjuncta may sometimes affect P. nigra var. calabrica in the same way. Various ...


Dothistroma pini on Pinus nigra in Minnesota.

Plant Disease Reporter, Vol. 55, No. 11. (1971), pp. 1040-1040


D. pini was reported for the first time in Minnesota during 1970; some Christmas tree plantations of Pinus nigra were severely affected. ...


Dieback disease of Pines with special reference to Corsican Pine, Pinus nigra var. calabrica Schn. III. Mycological factors

Forestry, Vol. 41, No. 1. (1968), pp. 72-82


Brunchorstia pinea is found to be consistently associated with early stages of dieback disease in a number of Pine species. Inoculation of buds with conidial suspensions of the fungus causes typical disease symptoms to develop. The proportion of successful inoculations depends on the time of year, the location of the tree, and its physiological condition. Vigorous trees are able to avoid infection, while weaker trees are very susceptible to attack. It is suggested that though infection depends on low resistance of ...

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