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Evaluation of phytochemical responses and paclitaxel content of yew (Taxus baccata) seedlings subjected to the systemic fungicides For. Pathol. (IF 1.4) Pub Date : 2024-02-24 Mahboubeh Ashnavar, Azim Ghasemnezhad, Kamran Rahnama, Mostafa Khoshhal Sarmast
Endophytic fungi pass all or at least a part of their life cycle inside or between host cells in living plant tissues. These fungi are not capable of causing disease in the host plants, however, they are deemed to be associated with the production of some secondary metabolites in plants. Therefore, this study was laid out to shed light on how fungicides are involved in the formation of key metabolites
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Needle pathogens of Rhytismataceae: Current knowledge and research opportunities for conifer foliar diseases For. Pathol. (IF 1.4) Pub Date : 2024-02-22 Jessa P. Ata, Kelly S. Burns, Jane E. Stewart
Needle diseases caused by pathogens within Rhytismataceae are increasing in frequency globally where pines are either a predominate species or are grown commercially, and yet remain poorly understood. Here, we provide background information on the current knowledge and management strategies of needle pathogens in the Rhytismataceae and discuss research opportunities using molecular tools to fill knowledge
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First report of Exobasidium miyabei causing Exobasidium leaf blisters on Rhododendron mucronulatum in Korea For. Pathol. (IF 1.4) Pub Date : 2024-02-22 Han‐Jung Sung, Ji‐Hyun Park, Hyeon‐Dong Shin, Sang Tae Seo
Recently, a previously unseen Exobasidium leaf blister disease was observed on Rhododendron mucronulatum in its natural habitat in Korea. The fungus associated with the disease was identified as Exobasidium miyabei based on morphological characteristics and two‐locus sequence analyses. To our knowledge, this is the first report of E. miyabei in Korea and of its novel association with the host species
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Angular leaf spot of Caucasian alder incited by a pathovar of Xanthomonas arboricola For. Pathol. (IF 1.4) Pub Date : 2024-01-30 Valeh Abbasi, Heshmatollah Rahimian, Mohammad Ali Tajick-Ghanbari, Ali Barzegar
Caucasian alder (Alnus subcordata) is among the major constituents of the Hyrcanian forests extending all along the southern coast of the Caspian Sea in northern Iran. An angular leaf spot with a yellowish chlorotic halo has attained a widespread occurrence throughout the forest and suburban areas of the northern provinces including Guilan, Mazandaran and Golestan. Strains of a Xanthomonas sp. were
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Sydowia polyspora associated with current season needle necrosis (CSNN) on Pinus brutia Ten. in Türkiye For. Pathol. (IF 1.4) Pub Date : 2024-01-30 Refika Ceyda Beram, Fatma Demiröz
Sydowia polyspora is a common fungal species living on conifers, often occurring as an epiphyte or endophyte on asymptomatic plants and in seeds. The fungus may become pathogenic under abiotic or biotic stress conditions. It is often associated with current season needle necrosis and shoot dieback on conifer species, especially Abies spp. and Pinus spp. throughout Europe and North America. The conifer
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Chestnut blight (Cryphonectria parasitica (Murr.) Barr) disease incidence and its effect on the morphological and anatomical features of Castanea sativa trees For. Pathol. (IF 1.4) Pub Date : 2024-01-15 Seray Özden Keleş, Sabri Ünal, Sefer Akan, Mertcan Karadeniz
Sweet chestnut (Castanea sativa) is an ecologically and economically valuable tree species worldwide. Various pathogens, both endemic or introduced, cause severe damage or death to chestnut trees. Chestnut blight, caused by the fungus Cryphonectria parasitica, is one of the most devastating plant diseases known which influences chestnut trees in all major cultivation regions. The work presented here
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Association of Onnia subtriquetra with living and dead bishop pine (Pinus muricata) and shore pine (Pinus contorta var. contorta) in California, USA For. Pathol. (IF 1.4) Pub Date : 2024-01-15 Christopher A. Lee, Ashley Hawkins, Hannah Suli, Wei Belisle, Suzanne Rooney-Latham
We report observations of Onnia subtriquetra on bishop pine (Pinus muricata) and shore pine (Pinus contorta var. contorta) from north coastal California. Our identification of this fungus is supported by molecular information, morphological characteristics, and and a description of the observed range of the fungus on the West Coast. These observations represent an expansion of the geographic and host
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First report of Cryphonectria carpinicola in Hungary and Slovakia (Central Europe) For. Pathol. (IF 1.4) Pub Date : 2024-01-15 Viktor Papp, Balázs Palla, Dávid Papp, Csaba Németh
Hornbeam (Carpinus betulus) is an economically significant tree species, serving as a valuable resource for timber and ornamental wood products. It plays a crucial ecological role within forest communities and exhibits wide distribution across Central Europe. During October 2022 and March 2023, we encountered instances of declining hornbeam trees in Hungary and Slovakia. In both cases, characteristic
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Growth and pulp production of eucalyptus trees affected by ceratocystis wilt For. Pathol. (IF 1.4) Pub Date : 2024-01-15 Lucas Antonio Benso, Amábili Alves Rangel, Rafael Augusto Soares Tiburcio, Marlon Michel Antonio Moreira Neto, Maria Márcia Pereira Sartori, Edson Luiz Furtado
Ceratocystis wilt is one of the most harmful diseases affecting eucalyptus crops and is associated with species of the complex Ceratocystis fimbriata sensu lato. This pathology leads to the obstruction of the vascular system in infected trees, resulting in symptoms such as branch wilting and death. The wood affected by the pathogen exhibits discolouration and changes in its chemical composition, which
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Anatomical and physiological consequences of beech leaf disease in Fagus grandifolia L. For. Pathol. (IF 1.4) Pub Date : 2023-12-17 Leila R. Fletcher, Aleca M. Borsuk, Ana C. Fanton, Kate M. Johnson, Jennifer Richburg, Joseph Zailaa, Craig R. Brodersen
Beech leaf disease (BLD) is a foliar disease of American Beech (Fagus grandifolia L.) causally linked to the nematode Litylenchus crenatae mccannii and has rapidly spread throughout central and northeastern North America. This study aimed to characterize the anatomical and physiological differences between asymptomatic and symptomatic leaves to provide evidence for a mechanistic link between abnormal
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First report of Fusarium commune causing Torreya grandis crown and root rot in China For. Pathol. (IF 1.4) Pub Date : 2023-12-11 Yi-hao Wu, Jing-jing Pan, Xiao-qiao Huang, Zhang-gui Gao, Hao-jie Shi, Hai-ping Lin, Xiu Su
Torreya grandis cv. Merrillii is an important economic tree widely cultivated in hilly subtropical areas in China and some parts of Japan and Korea. Crown and root rot was found on T. grandis in Zhejiang Province of China. Three isolates with similar morphology were isolated from diseased samples, and used for identification and pathogenicity tests. The pathogenicity of the isolates was confirmed by
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First report of phyllode rust on Acacia crassicarpa outside its native range For. Pathol. (IF 1.4) Pub Date : 2023-12-07 Michael J. Wingfield, Seonju Marincowitz, Irene Barnes, Marthin Tarigan, Myriam Solís, Alvaro Durán, Nam Q. Pham
Acacia crassicarpa is a tropical tree species native to Australia, West Papua and Papua New Guinea, which has been widely used to establish plantations in the lowland humid tropics of Sumatra and Kalimantan. These trees, able to grow on sites having relatively poor nutrition, have been relatively free of serious disease problems. A rust disease infecting the phyllodes of A. crassicarpa has recently
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First report of Phytophthora macrochlamydospora associated with tree decline in Pinus taeda in Brazil For. Pathol. (IF 1.4) Pub Date : 2023-11-27 Ana Carolina Lyra Brumat, Celso Garcia Auer, Dauri José Tessmann, Henrique da Silva Silveira Duarte, Álvaro Figueredo dos Santos
In 2019, 18-year-old Pinus taeda trees with symptoms of chlorosis in the aerial part, shortening of needles and reduced plant growth, ultimately leading to tree decline, were found in plantations in southern Brazil. When collecting roots, a reduction in the volume of fine roots in trees and absence of ectomycorrhiza was observed. An oomycete was isolated from the roots and soil of the rhizosphere,
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Electron microscopy and X-ray microanalysis of Pinus thunbergii needles: Stomatal penetration by seawater and solutes For. Pathol. (IF 1.4) Pub Date : 2023-11-15 Junhyung Park, Dahye Seo, Ki Woo Kim
Seawater salt deposition was investigated in the needles of Pinus thunbergii trees growing in the coastal area of Pohang, Korea. Both green asymptomatic and brown necrotized needles were air-dried and processed for field-emission scanning electron microscopy and X-ray microanalysis. Seawater salt crystals appeared randomly deposited on the asymptomatic needles. No distinct epicuticular waxes were found
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Cryptostroma corticale, the causal agent of sooty bark disease of maple, appears widespread in western Washington State, USA For. Pathol. (IF 1.4) Pub Date : 2023-11-15 Rachel K. Brooks, Daniel Omdal, Samuel Brown, Collin J. Marshall, Joseph M. Hulbert, Marianne Elliott, Gary Chastagner
The recent emergence of the fungus Cryptostroma corticale in Seattle, Washington, USA is concerning because of its invasive status in Europe, where it causes sooty bark disease of maples (SBD), killing both forest and urban trees. Additionally, the fruiting bodies (stromata) of C. corticale produce allergenic spores that can impact human health. Therefore, its presence in Washington has the potential
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Antagonistic interactions between native fungi of Minnesota and the root rot pathogen Heterobasidion irregulare For. Pathol. (IF 1.4) Pub Date : 2023-11-15 Eric C. Otto, Robert A. Blanchette
The forest pathogen, Heterobasidion irregulare, is a serious threat to conifers in North America including Minnesota. Fungi native to Minnesota were isolated and tested in laboratory and field assays to evaluate their antagonism towards H. irregulare. One management strategy for plant pathogens, and especially H. irregulare, is to use fungi as biological control agents. A successful biological control
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Identification and fungicide sensitivity of Fusarium asiaticum causing seedling rot of Hinoki cypress in a Forest nursery in South Korea For. Pathol. (IF 1.4) Pub Date : 2023-11-15 Hyeongju Choi, Narayan Chandra Paul, Hyun-Jun Kim, Hyunkyu Sang
In 2021, a seedling rot disease was observed on Hinoki cypress (Chamaecyparis obtusa) seedlings in a bareroot forest nursery in Naju-si, Jeollanam-do Province, South Korea. Infected seedlings were yellowing at the disease outset but became black after severe infection. At onset of disease, seedlings began yellowing. As disease progressed, black rot of the leaves and roots was common and eventually
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Patterns of Dothistroma septosporum conidial dispersal in Colombian Pinus tecunumanii plantations For. Pathol. (IF 1.4) Pub Date : 2023-10-24 G. M. Granados, C. A. Rodas, M. Vivas, M. J. Wingfield, I. Barnes
Dothistroma needle blight (DNB) caused by Dothistroma septosporum is one of the most important needle diseases of Pinus spp., especially in Southern Hemisphere plantations. In Colombia, the pathogen has caused severe outbreaks in plantations of Pinus tecunumanii of the low elevation population (LE). Currently, management strategies suffer from a lack of knowledge regarding the epidemiology of D. septosporum
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Detection and quantification of Cronartium pini from Scots pine bark and wood with Cronartium spp.-specific quantitative PCR For. Pathol. (IF 1.4) Pub Date : 2023-10-12 Ke Zhang, Jan Stenlid
The forest disease, Scots pine blister rust, is caused by the rust fungus Cronartium pini. This pathogen was previously known as the host-alternating type C. flaccidum and non-host-alternating type Peridermium pini. Recent epidemics of this disease in Northern European forests, especially young Scots pine forests in Sweden, caused significant economic and ecological losses. Cronartium pini can be identified
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Heights to white pine blister rust cankers caused by Cronartium ribicola on young Pinus monticola in the Oregon East Cascades For. Pathol. (IF 1.4) Pub Date : 2023-10-11 Brent W. Oblinger, Cameron M. Stauder
In addition to breeding for genetic resistance, lower branch pruning is a management strategy to mitigate adverse effects of Cronartium ribicola on young western white pine (Pinus monticola; WWP) in portions of the Interior Northwest, USA (INW). However, only data on heights of white pine blister rust (WPBR) cankers and post-treatment effects from outside the Oregon East Cascades (OEC) have previously
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Aggressiveness of Fusarium oxysporum and F. verticillioides isolates on stone and scots pine under greenhouse conditions For. Pathol. (IF 1.4) Pub Date : 2023-10-04 Jaime Olaizola, Juan A. Pajares, Thomas R. Gordon, Julio J. Diez
Scots pine (Pinus sylvestris) and Stone pine (Pinus pinea) are two important species used in re-forestation that are subject to damage by damping-off fungi in forest nurseries. Twenty-two isolates of Fusarium oxysporum and F. verticillioides from diseased seedlings of eight different hosts were tested for aggressiveness on seeds and seedlings of both pine species, including the effects on seedling
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Characterization of Lasiodiplodia theobromae (Pat.) Griffon & Maubl causing stem canker on Teak (Tectona grandis L.) in Ecuador For. Pathol. (IF 1.4) Pub Date : 2023-09-27 Sergio Miguel Vélez-Zambrano, Jefferson Bertin Vélez-Olmedo, Susana García, Bianca S. A. Bonfim, Pedro Emilio Cedeño, Danilo Pinho
Teak is a very important tropical timber in Ecuador. In 2017, teak samples displaying stem canker symptoms were collected in two provinces of Ecuador. From 11 symptomatic trees, 11 isolates resembling a species of Lasiodiplodia were obtained. All isolates obtained induced stem canker on teak plants after artificial inoculation, confirming them as the cause of the observed canker symptoms. Bayesian
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Quambalaria eucalypti found on Eucalyptus in Indonesia For. Pathol. (IF 1.4) Pub Date : 2023-09-11 Marthin Tarigan, Michael J. Wingfield, Yosep M. A. N. Marpaung, Alvaro Durán, Nam Q. Pham
The Eucalyptus plantation industry in Indonesia has expanded rapidly during the last few decades. During routine nursery disease surveys, symptoms of a leaf and shoot blight disease were detected on Eucalyptus mother plants. Isolates were obtained from symptomatic tissues and identified using DNA sequence analyses. Phylogenetic analyses showed that the isolates were those of Quambalaria eucalypti.
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Correction For. Pathol. (IF 1.4) Pub Date : 2023-08-31
Masumoto, S. (2023). The northernmost plant pathogenic fungus, Rhytisma arcticum sp.nov.: Morphological and molecular characterization of a novel species from Ellesmere Island, Canada. Forest Pathology, e12818. The original version of this Article contains errors. The name of the new species Rhytisma arcticum was not registered in one of the approved repositories of the prior publication and therefore
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Differences in virulence of genets of Heterobasidion annosum and susceptibility of young plants of different conifer species and origins For. Pathol. (IF 1.4) Pub Date : 2023-08-25 Refika Ceyda Beram, Ayşe Gülden Aday Kaya, Hatice Tuğba Doğmuş Lehtijärvi, Asko Lehtijärvi, Steve Woodward
Heterobasidion species are the most important pathogens causing root and stem rot on conifers in northern hemisphere forests. The host list of this complex is very wide and includes over 200 species of trees and shrubs. Among the members of this complex, Heterobasidion annosum s. s. has the largest host range. In this study, young plants of Pinus sylvestris, Picea orientalis, Abies nordmanniana, Cedrus
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Identification, pathogenicity and control of powdery mildew caused by Erysiphe elevata on Eucalyptus pellita in Sumatra, Indonesia For. Pathol. (IF 1.4) Pub Date : 2023-08-21 Leonardo S. S. Oliveira, Muhamad A. Saha, Fahimeh Jami, Rianza Asfa, Maggie V. Maretha, Jaliaman Sipayung, Marthin Tarigan, Alvaro Duran
Powdery mildews are biotrophic ascomycetes that do not typically kill their hosts, but instead interfere with normal plant growth. In Indonesia, white powdery spots were observed forming on the upper part of fully developed leaves of Eucalyptus pellita planted in sand beds of a clonal nursery. Thus, this study aimed to identify the causal agent of eucalypt powdery mildew in Indonesia as well as to
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Artificial inoculation and susceptibility of Pinus armandii to Dothistroma septosporum For. Pathol. (IF 1.4) Pub Date : 2023-08-18 Zuzana Jánošíková, Emília Ondrušková, Katarína Adamčíková
Dothistroma needle blight (DNB) is a serious needle disease of conifers that primarily affects pine species (Pinus spp.). Dothistroma septosporum is one of the DNB pathogens that has a diverse range of host species excluding Pinus armandii. In 15 inoculated P. armandii seedlings, D. septosporum acervuli were observed in 43 infected needles of ten seedlings with a mean disease severity of 1.11% at 25 weeks
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Fungal pathogens associated with twig canker of shrub species in Tunisia: Considering the effect of the factors correlated For. Pathol. (IF 1.4) Pub Date : 2023-08-07 Sawssen Hlaiem, Islem Yangui, Olfa Ezzine, Gianni Della Rocca, Sara Barberini, Roberto Danti, Mohamed Lahbib Ben Jamâa
Decline phenomena of shrub species such as Quercus coccifera and Retama raetam have occurred throughout Tunisian forests since 2012. These evergreen shrubs have long been regarded for their medicinal and ecological interests. Therefore, their preservation as valuable forest resources is of great interest. However, information regarding aetiology of this disease is still scarce. Hence, the aim of this
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Bioclimatic variables and their impact on the potential distribution of Brenneria goodwinii in Europe For. Pathol. (IF 1.4) Pub Date : 2023-07-25 Miłosz Tkaczyk
Brenneria goodwinii is a Gram-negative bacterium associated with the phenomenon of Acute Oak Decline (AOD), which has played a very important role in the decline of oak populations in Europe in recent years. In this paper, the Maxent model was developed to detect the trend in the distribution of B. goodwinii in Europe. Generated from confirmed location data and bioclimatic variables, the Maxent model
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The pine pathogen Diplodia sapinea is associated with the death of large Douglas fir trees For. Pathol. (IF 1.4) Pub Date : 2023-07-19 Elisabeth Ritzer, Martin Schebeck, Thomas Kirisits
Climate change poses severe pressures to European conifer forests. Using non-native tree species, such as Douglas fir (Pseudotsuga menziesii), is one proposed strategy to circumvent adverse effects for forest management. However, novel forest health risks can impair the cultivation of non-native trees. In 2022, we observed large Douglas fir trees (approximately 40–50 years old, diameter at breast height
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Diplodia twig canker (Diplodia gallae) of northern red oak (Quercus rubra) in the northeastern United States For. Pathol. (IF 1.4) Pub Date : 2023-07-06 Nicholas J. Brazee, Isabel A. Munck, Kelsey McLaughlin, Savannah Ferreira, Nicole Keleher
The 2015–2018 outbreak of spongy moth (Lymantria dispar) in southern New England initiated a severe oak decline and mortality event. While defoliation was a primary driver, increased secondary pest and pathogen activity contributed to decline and death. Following this large defoliation event, Diplodia was frequently recovered from northern red oaks (Quercus rubra) with serious outbreaks of twig cankering
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The culturable leaf mycobiome of Viscum album subsp. austriacum For. Pathol. (IF 1.4) Pub Date : 2023-07-01 Robert Jankowiak, Piotr Bilański, Julita Zając, Adrianna Jobczyk, Stephen J. Taerum
In Poland's pine forests, mistletoe (Viscum album subsp. austriacum) abundance has increased over the past 20 years. This mistletoe infestation has decreased the growth and vigour of Scots pine trees. In this study, we surveyed the culturable fungi from healthy and diseased V. album subsp. austriacum leaves from two stands in Poland. In total, 63 distinct species were identified, 99.8% of which belonged
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The northernmost plant pathogenic fungus, Rhytisma arcticum sp. nov.: Morphological and molecular characterization of a novel species from Ellesmere Island, Canada For. Pathol. (IF 1.4) Pub Date : 2023-06-19 Shota Masumoto
A novel fungal pathogen, Rhytisma arcticum, is described, causing tar spot disease on Salix arctica in Ellesmere Island, Canada. Stromata, asci and ascospores—distinctly smaller than other Rhytisma species found on Salix—are its distinctive morphological features. rDNA internal transcribed spacer (ITS) and large-subunit (LSU) sequence analyses revealed a close relation of this species to R. polare
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Susceptibility of silver birch and black alder to several Phytophthora species isolated from soils in declining broadleaf forests in western Ukraine For. Pathol. (IF 1.4) Pub Date : 2023-06-19 Iryna Matsiakh, Noelia López-García, Magdalena Kacprzyk, Michelle Cleary
In declining broadleaf forests in western Ukraine, several Phytophthora species including P. plurivora, P. bilorbang, P. polonica, P. gonapodyides and P. cactorum were recovered using soil baiting assays and identified using morphological and molecular methods. Pathogenicity tests of selected isolates were performed on black alder (Alnus glutinosa (L.) Gaerth.) and silver birch (Betula pendula Roth
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Morphology and molecular phylogeny of Erysiphe japonica var. japonica found on Quercus aliena in Korea For. Pathol. (IF 1.4) Pub Date : 2023-06-08 In-Young Choi, Lamiya Abasova, Joon-Ho Choi, Byoung-Ki Choi, Hyeon-Dong Shin
In October 2022, Erysiphe powdery mildew from the section Typhulochaeta was found on Quercus aliena for the first time in Korea. Based on morphological characteristics and molecular-phylogenetic analysis of the internal transcribed spacer region (ITS) and large subunit (LSU) gene sequences of the rDNA, the fungus was identified as Erysiphe japonica var. japonica. This is the first report of E. japonica
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Field ready: Development of a rapid LAMP-based colorimetric assay for the causal agent of white pine blister rust, Cronartium ribicola For. Pathol. (IF 1.4) Pub Date : 2023-05-18 Olga Kozhar, Jorge R. Ibarra Caballero, Kelly S. Burns, Jane E. Stewart
The invasive fungal pathogen Cronartium ribicola causes white pine blister rust which is considered one of the most destructive diseases of five-needle (white) pines in North America. The disease has a life cycle that requires two hosts: white pines and Ribes spp., although other non-Ribes species, including Castilleja and Pedicularis, have been demonstrated as alternate hosts as well. Detection of
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Changes to relative stand composition after almost 50 years of Heterobasidion root disease in California true fir and pine forests For. Pathol. (IF 1.4) Pub Date : 2023-05-15 D. Alexander Flores, Adrian L. Poloni, Susan J. Frankel, Richard C. Cobb
The Agaricomycete Heterobasidion annosum sensu lato (s.l.), a species complex of fungal pathogens, causes root and butt rot on conifers throughout the northern hemisphere, thereby shaping structure, composition, and evolution of vast and diverse forest ecosystems. We analyze forest change 48–49 years following Heterobasidion root disease emergence in 63 permanent plots first established in 1970–1972
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New branch disease of Styphnolobium japonicum caused by Fusarium solani in Xinjiang of China For. Pathol. (IF 1.4) Pub Date : 2023-05-02 Qian Wang, Yuanze Shi, Junnan Yu, Lulu Shan, Deying Sun, Shuqing Yang, Xiaofei Chen
Styphnolobium japonicum (L.) Schott is a deciduous tree belonging to family Fabaceae and has been widely planted as garden greenery in China. In May 2021, a serious branch canker disease was observed in Alaer City. In order to identify the pathogen, five fungi were isolated from the diseased branches and the pathogenicity was evaluated by inoculating the branches outdoors. The pathogen was re-isolated
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Vitality characterization of stressed trees based on non-destructive and real-time monitoring of stem water content For. Pathol. (IF 1.4) Pub Date : 2023-05-02 Lei Liu, Runze Song, Qiaoling Han, Yue Zhao, Yandong Zhao
The detection of stem water content is necessary as it is an important indicator for measuring woody plant vitality. However, the relationship between stem water content, determined by non-destructive, real-time, and long-term monitoring, and woody plant vitality remains undefined. In this study, the response of woody plant vitality to stem water content under different stress (freeze–thaw, pest, or
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Determination of vc and mating types of Cryphonectria parasitica isolates by multiplex PCR and their genetic diversity in 13 chestnut-growing provinces of Turkey For. Pathol. (IF 1.4) Pub Date : 2023-04-24 Deniz Çakar, Göksel Özer, Seçil Akıllı Şimşek, Salih Maden
Vegetative compatibility (vc) and mating types and genetic diversity of Cryphonectria parasitica isolates were determined using 183 isolates obtained from 215 infected chestnut trees growing in 13 provinces of Turkey. Based on the cultural aspects, 143 of these isolates were evaluated as virulent whereas the remaining 40 isolates were hypovirulent. When vc types of 183 isolates were classically differentiated
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Ambrosia beetles (Coleoptera: Curculionidae) can directly transmit the fungal pathogens responsible for Rapid ʻŌhiʻa Death For. Pathol. (IF 1.4) Pub Date : 2023-04-24 Kylle Roy, Kelly A. Jaenecke, Ellen J. Dunkle, Dan Mikros, Robert W. Peck
The ecologically and culturally vital tree species, ʻōhiʻa lehua (Metrosideros polymorpha), is threatened by the fungal pathogens Ceratocystis lukuohia and Ceratocystis huliohia, the causal agents of the disease complex called Rapid ʻŌhiʻa Death (ROD). Four invasive ambrosia beetle (Coleoptera: Curculionidae: Scolytinae) species in the Xyleborini tribe colonize ROD Ceratocystis-infested ‘ōhiʻa and
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Towards resolving Nothophaeocryptopus and Rhizosphaera inhabitants of spruce needles For. Pathol. (IF 1.4) Pub Date : 2023-04-19 Joanne E. Taylor, Ondřej Koukol
Our knowledge of the endophytic fungal community associated with needles of Sitka spruce (Picea sitchensis) is rather limited, which contrasts with the importance of this tree species for forestry in the UK. In our study, we focused on the detailed characterization of multiple isolates tentatively placed into the genera Nothophaeocryptopus and Rhizosphaera that were obtained from needles of Sitka spruce
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Phytophthora alticola and P. boodjera associated with decline of young Eucalyptus smithii trees in Uruguay For. Pathol. (IF 1.4) Pub Date : 2023-04-11 Franco De Benedetti, Victoria Moreira, Pedro Mondino, Sandra Alaniz
Eucalyptus production mainly destined to cellulose pulp production has expanded strongly in the last 30 years in Uruguay. Eucalyptus smithii has recently emerged as a promising species for cellulose pulp production. However, an average of 40% of young trees die during the first and second summer of post-planting. In this study, 32 Phytophthora isolates were obtained from 132 E. smithii young trees
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Occurrence of brown root rot in Ocean Expo Park, Okinawa, Japan: Infection route and preventive control measures For. Pathol. (IF 1.4) Pub Date : 2023-03-23 Satoshi Tsujimoto, Mitsuteru Akiba, Norikazu Kameyama, Norio Sahashi
Ocean Expo Park, established in 1976 on subtropical Okinawa Island, Japan, has approximately 8000 planted or naturally grown trees in an area of 77.2 ha. Windfall of these trees occurs mainly due to typhoons; wood chips made from the trunks and roots of windfall trees are commonly used as mulching material throughout the park areas, despite possible infection by pathogenic fungi such as Phellinus noxius
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Pseudopestalotiopsis elaeidis associated with leaf spots on Cycas revoluta in Brazil For. Pathol. (IF 1.4) Pub Date : 2023-03-18 André Wilson Campos Rosado, Alessandra de Jesus Boari, Danilo Oliveira Ramos, Fábio Alex Custódio, Ayane Fernanda Ferreira Quadros, Izabel Cristina Alves Batista, Olinto Liparini Pereira
Cycas revoluta (Cycadaceae) is commonly cultivated as an ornamental tree in several countries. In April 2015, C. revoluta leaves showing brownish spots with a yellow halo that progressed to leaflet necrosis were observed in Belém, Pará state, Brazil. This study aimed to determine the aetiology of this disease on sago palm in Brazil. Based on DNA sequence-based phylogeny, morphology, and colony characterization
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Outbreak of shoot blight and dieback of Eucalyptus spp., caused by Pseudoplagiostoma eucalypti in Brazil For. Pathol. (IF 1.4) Pub Date : 2023-03-17 Edival Ângelo Valverde Zauza, Lúcio Mauro da Silva Guimarães, Nilza de Lima Pereira Sales, Samuel Alves dos Santos, Rafael Ferreira Alfenas, Acelino Couto Alfenas
An outbreak of a new and severe disease was observed in Eucalyptus plantations of Bahia state, Brazil. An Ascomycota fungus has been frequently associated with the main symptoms of the disease namely leaf spot, branch cankers, shoot blight, defoliation, and dieback. Based on morphological characteristics, phylogenetic analysis (ITS and TEF-1α genes), and pathogenicity test on Eucalyptus plants, Pseudoplagiostoma
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Chrysoporthe puriensis causing canker and mortality in Pleroma mutabile in the Atlantic Forest, Brazil For. Pathol. (IF 1.4) Pub Date : 2023-03-14 Géssica Mylena Santana Rêgo, Iêda Alana Leite de Souza, Gabrielle Avelar Silva, Mara Elisa Soares de Oliveira, Maria Alves Ferreira
Fungi of the Cryphonectriaceae family are globally known to be tree pathogens. In Brazil, several species of Chrysoporthe have been found causing stem and branch cankers in Pleroma (= Tibouchina) spp. Recently, Chrysoporthe puriensis was described as a new species causing stem and branch cankers in Pleroma granulosum, Pleroma candolleanum, and Pleroma heteromallum, all native species of the Melastomataceae
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Destruction of Fraxinus angustifolia and Fraxinus ornus seeds under storage conditions caused by Epicoccum nigrum For. Pathol. (IF 1.4) Pub Date : 2023-03-06 Aleksandar Vemić, Vladan Popović, Josef Janoušek, Zlatan Radulović
During the period of seed storage in 2019, stored Fraxinus angustifolia and F. ornus seeds showed signs of infection and fungus Epicoccum nigrum was isolated from mould and necrotic lesions on the seeds. In order to confirm the pathogenicity of E. nigrum towards F. angustifolia and F. ornus seeds, an experiment that included inoculation of seeds with E. nigrum and the assessment of germinability was
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Multilocus phylogenetic analysis revealed a new cryptic lineage of Serpula himantioides in Japan For. Pathol. (IF 1.4) Pub Date : 2023-03-06 Ayuka Iwakiri, Hitomi Ota, Norihisa Matsushita, Ryusei Haraguchi, Toshihiro Yamada, Kenji Fukuda
Serpula himantioides is a widely distributed saprotrophic fungus that causes root and butt rot in various tree species. In Japan, butt rot associated with S. himantioides is observed in Chamaecyparis pisifera and Abies sachalinensis. Previous studies have shown that S. himantioides includes five phylogenetically defined cryptic lineages, but the placement of Japanese isolates remains unclear. To clarify
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The effects of pine mistletoe (Viscum album subsp. austriacum) on the growth of Scots pine and Crimean pine in Turkey For. Pathol. (IF 1.4) Pub Date : 2023-03-06 Oytun Emre Sakici, Gonca Ece Özcan, Mehmet Seki, Fadime Sağlam
In this study, the effect of pine mistletoe (Viscum album subsp. austriacum) on basal area increment of Crimean pine and Scots pine was investigated. Dendrochronological data were collected from 223 (71 uninfected and 152 infected) Crimean pines and 195 (77 uninfected and 118 infected) Scots pines located in Kastamonu province of Turkey in 2014. Infected sample trees were classified as light, moderate
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Occurrence of Phytophthora species in riparian stands of black alder (Alnus glutinosa) in Slovakia For. Pathol. (IF 1.4) Pub Date : 2023-02-27 Miłosz Tkaczyk, Katarzyna Sikora, Juraj Galko, Andrej Kunca
During the monitoring period of alder decline phenomenon in Slovakia, indicative symptoms of Phytophthora diseases were observed in riverside stands in Slovakia. The study aimed to test the presence and diversity of Phytophthora species in declining alder stands. The samples were collected from six stands situated by rivers/streams in the central and eastern parts of Slovakia. Phytophthora plurivora
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Cover For. Pathol. (IF 1.4) Pub Date : 2023-02-23 David Noshad, Nicholas Ukrainetz, John King, Alvin Yanchuk
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Spatiotemporal dynamics of bacterial wilt in Eucalyptus For. Pathol. (IF 1.4) Pub Date : 2023-02-22 Ana P. Rossi, Waldir C. Jesus Junior, Edival A. V. Zauza, Marcos P. Coutinho, Breno Benvindo dos Anjos, Willian Bucker Moraes
Bacterial wilt (caused by Ralstonia spp.) is one of the most damaging diseases of Eucalyptus species, and is responsible for substantial losses to producers. For efficient, scientifically-based management of this disease, it is necessary to understand the various factors involved in its development, including greater knowledge of the epidemiology of the pathogen on Eucalyptus spp. This study aimed
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First report of Leveillula clavata causing powdery mildew on Euphorbia leucocephala from India For. Pathol. (IF 1.4) Pub Date : 2023-02-06 Sujit Hanumant Wagh, Mahadev Bhimappa Kanade, Sachin Vasantrao Thite, Uwe Braun, Kamila Câmara Correia, Guadalupe Arlene Mora-Romero, Juan Manuel Tovar-Pedraza
In December 2020, Euphorbia leucocephala plants exhibiting symptoms of powdery mildew were observed in the Botanical Garden of Tuljaram Chaturchand College, Baramati, Maharashtra, India. Based on morphological identification, DNA sequence analysis, and pathogenicity, the fungal pathogen of the disease was identified as Leveillula clavata. This is the first report of L. clavata on Euphorbia leucocephala
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First report of Phyllosticta spinarum causing arborvitae foliar blight in Russia For. Pathol. (IF 1.4) Pub Date : 2023-02-02 Maria M. Gomzhina, Philipp B. Gannibal
Thuja occidentalis is a popular and widely planted tree in Russia. However, it is susceptible to arborvitae foliar blight, which can compromise the long-term health of trees in the landscape and in nursery production. Leaves with arborvitae needle blight were collected in 2019 in the foothill zone of the Republic of Adygea, and two isolates of Phyllosticta sp. were obtained. Multilocus analyses were
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Corrigendum For. Pathol. (IF 1.4) Pub Date : 2023-01-27
Correction to “Early detection of the oak wilt fungus (Bretziella fagacearum) using trapped nitidulid beetle vectors”. McLaughlin, K., Snover-Clift, K., Somers, L., Cancelliere J., & Cole, R. (2022). Early detection of the oak wilt fungus (Bretziella fagacearum) using trapped nitidulid beetle vectors. Forest Pathology, 52 (5), 1–7. In this article, the CF01 sequence has been corrected in Table 2 from
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Rigidoporus microporus and the white root rot disease of rubber For. Pathol. (IF 1.4) Pub Date : 2023-01-20 Noor Baity Saidi, Jameel R. Al-Obaidi, Ahmad Faiz bin Che Fisol
Rigidoporus microporus is an economically important plant pathogenic fungus causing particularly severe losses to the rubber industry worldwide. The pathogen is responsible for white root rot (WRR) disease, infecting the host roots via white fibrous mycelia, causing vascular disfunction, and visible symptoms including leaf discolouration and dieback in severely infected trees. The final stage of the
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Epicuticular wax content of western white pine is involved in Cronartium ribicola resistance For. Pathol. (IF 1.4) Pub Date : 2023-01-20 David Noshad, Nicholas Ukrainetz, John King, Alvin Yanchuk
The introduction of Cronartium ribicola, the causative agent of white pine blister rust, has been devastating for white pines in North America, including western white pine. Among the observed partial resistance responses to white pine blister rust is a mechanism referred to as difficult-to-infect (DI), which is characterized by lower frequency of infection spots on needles and a lower incidence of
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Functional roles of nematodes associated with the walnut twig beetle and eastern black walnut in the inland northwest For. Pathol. (IF 1.4) Pub Date : 2023-01-20 Geoffrey M. Williams, Matthew D. Ginzel
Beetles (Scolytinae) form intimate associations with a taxonomically and functionally diverse suite of nematodes that are phytopathogens, fungal feeders, and entomoparasites. Despite their ubiquity, the ecological significance of nematodes in the lifecycles of economically important bark and ambrosia beetle species (Curculionidae: Scolytinae) and associated plant diseases remains largely unexplored
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Characterization, pathogenicity and host range studies of Paecilomyces formosus associated with dieback of Christ's thorn trees (Paliurus spina-christi Mill.) in Iran For. Pathol. (IF 1.4) Pub Date : 2023-01-12 Taha Rostami, Samad Jamali
Christ's thorn (Paliurus spina-christi Mill.) tree is an important and valuable forestry species and has significant potential in afforestation and reforestation systems. In recent years, dieback symptoms were observed on Paliurus spina-christi trees in Gilan-e Gharb region of Kermanshah province, west Iran. During 2020 to 2021, Christ's thorn trees that exhibit branch dieback symptoms were sampled