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Literatura académica sobre el tema "Bursaphelenchus"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Bursaphelenchus"

Urek, G., S. Širca y B. Geric. "Morphometrical and molecular characterization of Bursaphelenchus species from Slovenia". Helminthologia 44, n.º 2 (1 de junio de 2007): 37–42. http://dx.doi.org/10.2478/s11687-007-0001-0.

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AbstractThe environmental conditions in Slovenia are relatively favourrable for the colonisation and spread of the pine wood nematode Bursaphelenchus xylophilus, a very dangerous pathogenic species which was recently identified in Europe in Portugal. To determine the presence of B. xylophilus in Slovenia and to introduce proper measures against its emergence and spread, a survey of Bursaphelenchus species was conducted in Slovenia from 2002 to 2005. Approximately 120 ha of conifer forests in Slovenia were surveyed for the presence of Bursaphelenchus species. In total, 206 wood samples were taken from the conifer forests. B. hofmanni, B. mucronatus were found for the first time in Slovenia, while B. xylophilus was not detected. Additionally, the species Aphelenchoides stammeri which is morphologically very similar to Bursaphelencus was found. All species have been described morphologically and characterized by ITS-RFLP analysis. Sequences of ribosomal DNA for B. hofmanni, B. mucronatus were analysed.

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Liu, Kan-Cheng, Ailing Ben, Zhengmin Han, Ye Guo y Dongxia Cao. "Interspecific hybridization between Bursaphelenchus xylophilus and Bursaphelenchus mucronatus". Journal of Forestry Research 30, n.º 2 (3 de mayo de 2018): 699–707. http://dx.doi.org/10.1007/s11676-018-0658-x.

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Chen, Fengmao, Jianren Ye, Jian Tang y Xiaoqin Wu. "Discrimination of Bursaphelenchus xylophilus and Bursaphelencus mucronatus by PCR-RFLP technique". Frontiers of Forestry in China 2, n.º 1 (marzo de 2007): 82–86. http://dx.doi.org/10.1007/s11461-007-0013-4.

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Kanzaki, Natsumi y Robin M. Giblin-Davis. "The genus Berntsenus Massey, 1974 is a junior synonym of Bursaphelenchus Fuchs, 1937". Nematology 22, n.º 6 (14 de julio de 2020): 677–95. http://dx.doi.org/10.1163/15685411-00003332.

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Summary Stylet (feeding) dimorphism of Bursaphelenchus sinensis was experimentally confirmed during a recent study and its predatory form was considered similar in morphology to species of Berntsenus. Therefore, available type and voucher materials for members of Berntsenus were examined for their morphology and compared with Bursaphelenchus sinensis and B. aberrans, another related species showing feeding dimorphism. The typological characters of their co-habiting aphelenchoidid species were also examined. The type materials of Berntsenus spp. have characteristic squared lips, a thick stylet, large median bulb and short and stout pharyngeal glands; males, when present, have a P1 papilla and a tape-like bursa, suggesting that they are the predatory form of improperly classified Bursaphelenchus species. In addition, Aphelenchoides pityokteini and Ektaphelenchus tenuidens (= Aphelenchoides tenuidens), co-occurring with their respective host bark beetle isolates of Berntsenus, were typologically confirmed to belong to the aberrans-group of Bursaphelenchus and considered to be conspecific to each co-habiting Berntsenus species. Herein, Berntsenus is synonymised with Bursaphelenchus, and Bursaphelenchus brachycephalus n. comb. (= Berntsenus brachycephalus and E. tenuidens) and Bursaphelenchus pityokteini n. comb. (= A. pityokteini and Berntsenus labiosus) are proposed.

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Tomiczek, Christian, Helen Braasch, Wolfgang Burgermeister, Kai Metge, Ute Hoyer y Martin Brandstetter. "Identification of Bursaphelenchus spp. isolated from Chinese packaging wood imported to Austria". Nematology 5, n.º 4 (2003): 573–81. http://dx.doi.org/10.1163/156854103322683292.

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Abstract Bursaphelenchus spp. found in packaging wood (pallets, crates, dunnage) imported with other goods from China to Austria in 1999 were identified, and their possible vector species of wood- and bark-breeding insects were recorded. Of the inspected consignments of coniferous and deciduous wood, 43 (78%) were either contaminated with insects or nematodes or showed grubholes or galleries of wood- and bark-breeding insects. Of the 33 samples of coniferous packaging wood with symptoms of insect attack, 48.5% had been attacked by longhorn beetles (Cerambycidae), with 11 samples harbouring living stages of Monochamus, the vector of Bursaphelenchus xylophilus and B. mucronatus. Living stages of non-European Scolytidae, possibly vectors of other Bursaphelenchus spp., were found in seven samples. Nematodes were found in 24 consignments, of which nine (=27% of the 33 coniferous wood samples) were contaminated with Bursaphelenchus spp. Seven samples contained B. mucronatus (East Asian genotype), whereas B. thailandae and B. aberrans were each found in two samples which were also contaminated with B. mucronatus. Morphological features and measurements for the three species found and ITS-RFLP patterns for B. thailandae and B. mucronatus are presented. Bursaphelenchus thailandae and B. aberrans were found for the first time in wood transported over long distances. Bursaphelenchus thailandae is recorded for the first time from China and its ITS-RFLP profile, enabling differentiation of the species from 17 other Bursaphelenchus spp., is presented.

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Braasch, Helen y Rainulf Braasch-Bidasak. "First record of the genus Bursaphelenchus Fuchs, 1937 in Thailand and description of B. thailandae sp. n. (Nematoda: Parasitaphelenchidae)". Nematology 4, n.º 7 (2002): 853–63. http://dx.doi.org/10.1163/156854102760402621.

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AbstractWood samples were taken from pine trees in the mountainous region between Pai and Maehongson in northern Thailand. Four species of Bursaphelenchus were recovered from the samples: Bursaphelenchus hylobianum, B. mucronatus, B. aberrans and B. thailandae sp. n. Bursaphelenchus thailandae sp. n. is most similar to B. sychnus but also shows similarities with B. ruehmi, B. hunanensis and B. steineri. It has a relatively small stylet lacking distinct basal knobs and a lateral field with four lines. The female has more or less protruding vulval lips and a slim, conoid, tail. The relatively small and delicate spicules show a distinctive darker sector and lack a cucullus. The male tail has a very small terminal 'bursa'. Bursaphelenchus thailandae sp. n. is tentatively included in the B. fungivorus -group of the genus Bursaphelenchus. Brief notes and morphometric data are given for the other species found. The record of B. mucronatus indicates that conditions for the establishment of the closely related B. xylophilus (the cause of pine wilt disease) may be suitable in Thailand and strict phytosanitary measures are therefore advisable.

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Altemayer, Valérie, Bruno Vincent, Pedro Naves, François Lieutier, Géraldine Roux-Morabito y Edmundo Sousa. "Competitive interaction between Bursaphelenchus xylophilus and the closely related species Bursaphelenchus mucronatus". Nematology 10, n.º 2 (2008): 219–30. http://dx.doi.org/10.1163/156854108783476403.

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AbstractBursaphelenchus xylophilus is an invasive pest of pines. When introduced accidentally into a new geographic area, it will share the same ecological niche as the closely related indigenous species, B. mucronatus. Competition between native and introduced species may affect the spread of invasive species, so we investigated the possible competitive interaction between these two nematode species transmitted by the same insect-vector, Monochamus galloprovincialis. In order to understand how the two species interacted, we compared, under laboratory conditions, their growth on fungi and pines, their ability to board M. galloprovincialis, and their competitive interaction in situations of double boarding. Bursaphelenchus xylophilus showed greater rates of growth than B. mucronatus in single and mixed treatments. The invasive species was competitively superior to the indigenous species in mixed treatments (fungi and pines). This competitive advantage in pines, prior to the beetles' infestation, could explain the greater abundance of the invasive (68%) species over the indigenous in the insect vector M. galloprovincialis. The indigenous species had no effect on beetle boarding of the invasive species. The occurrence of B. mucronatus in France and its wide distribution on numerous pine species could have an effect on B. xylophilus invasion in the initial steps of an invasion process. Nevertheless, due to the superior competitiveness of B. xylophilus, we cannot state that B. mucronatus will be efficient as a factor to decrease propagation of this invasive species.

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Arias, María, Miguel Escuer, J. Pedro Mansilla y Adela Abelleira. "The genus Bursaphelenchus Fuchs (Nematoda: Aphelenchida) in north-west Spain". Nematology 5, n.º 5 (2003): 677–85. http://dx.doi.org/10.1163/156854103322746850.

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AbstractAs a consequence of the report of pine wood nematode (Bursaphelenchus xylophilus) in the Setúbal peninsula (Portugal), nematodes of the genus Bursaphelenchus and the vector insect were studied in pine forests, timber industries and entry points for imported timber in Galicia (north-west Spain). The aim of this paper was to contribute to the establishment of the necessary measures to prevent the introduction of B. xylophilus into Spain. Sampling, nematode extraction and identification were carried out according to the EU norm. From collections made in 1999-2002, a total of 2612 samples were studied. Bursaphelenchus eggersi, B. mucronatus and B. sexdentati were found, as well as Monochamus galloprovincialis, a vector cerambycid beetle. Bursaphelenchus xylophilus was not isolated. Morphometric characteristics and geographic distribution of the species are provided and the risk of introducing B. xylophilus to Spain assessed.

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Li, Hongmei, Malcolm Kennedy, John Jones, Nurul Karim, Taisei Kikuchi y Maurice Moens. "Identification of putative expansin-like genes from the pine wood nematode, Bursaphelenchus xylophilus, and evolution of the expansin gene family within the Nematoda". Nematology 11, n.º 3 (2009): 355–64. http://dx.doi.org/10.1163/156854109x446953.

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AbstractWe report the cloning and characterisation of genes encoding expansin-like proteins from the pine wood nematodes, Bursaphelenchus xylophilus and B. mucronatus. A small family of genes is present in both species and the Bursaphelenchus genes are most similar to expansins and expansin-like proteins from the potato cyst nematode Globodera rostochiensis and root-knot nematodes. Molecular modelling suggests that the genes could encode a protein with a structure similar to that of functionally characterised expansins. Expression analysis showed that the Bursaphelenchus expansin-like genes are expressed solely in the pharyngeal gland cells, implying a role in the host-parasite interaction, most likely in assisting migration through the plant. Some G. rostochiensis and root-knot nematode expansins are composed of a carbohydrate-binding domain coupled to an expansin domain but no carbohydrate binding domain is present on any of the Bursaphelenchus sequences. We suggest a model for evolution of the expansin gene family within the plant-parasitic nematodes of the Tylenchida and Aphelenchida.

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Cui, Haiyan, Hui Jin, Quan Liu, Zhiqiang Yan, Lan Ding y Bo Qin. "Nematicidal metabolites from roots of Stellera chamaejasme against Bursaphelenchus xylophilus and Bursaphelenchus mucronatus". Pest Management Science 70, n.º 5 (5 de septiembre de 2013): 827–35. http://dx.doi.org/10.1002/ps.3625.

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Tesis sobre el tema "Bursaphelenchus"

Kučinskas, Vaclovas. "Pušinių stiebinių nematodų (Bursaphelenchus sp.) paplitimas Lietuvoje". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050614_101001-46297.

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Objective – research the pine wood nematodes Bursaphelenchus sp. situation in Lithuania. Goals: 1. Research of native pine wood nematode species composition in Lithuania; 2. Research of preconditions for harmful pine wood nematode species to enter Lithuania; 3. Research of conditions for non-native pine wood nematode species to establish, breed and spread; 4. Research of consequences if harmful species becomes established in Lithuania, anticipate pest management options. Object of the study – coniferous (pine) forests in Lithuania and companies, processing imported wood. Methods. Samples were taken in coniferous clearcuts and wood processing companies from the stained wood or wood with evidence of Monochamus activities. Nematodes were extracted sing Baermann method. Preconditions for nematodes to enter Lithuania, establish and spread were analysed using statistical and literature sources. Strengths, weaknesses, opportunities, threats (SWOT) analysis was applied to the situation of Bursaphelenchus in Lithuania. Results. 27 forest enterprises and 62 wood processing companies were studied. For the first time in Lithuania non-pathogenic species Bursaphelenchus mucronatus was found. Assessement of conditions for wood nematodes in the country (import assortment and volume, countries, host plants and potential vectors), real probability for harmful species, particularly Bursaphelenchus xylophilus, to enter, establish and spread was defined. Existing quarantine system might... [to full text]

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Mallez, Sophie. "Invasion du nématode du pin Bursaphelenchus xylophilus". Thesis, Nice, 2014. http://www.theses.fr/2014NICE4099/document.

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Dans ce projet, nous nous sommes intéressés à l’invasion du nématode du pin, Bursaphelenchus xylophilus, un ver microscopique responsable de la maladie du dépérissement du pin et causant la perte de millions d’arbres annuellement à travers le monde. Notre objectif global était d’affiner nos connaissances sur ce cas d’invasion et particulièrement d’établir l’histoire d’invasion des populations européennes. Nous avons analysé la diversité génétique neutre d’échantillons de populations naturelles de nématode du pin de l’aire native et de différentes zones envahies à l’aide de méthodes de génétique des populations. Ces analyses ont essentiellement mis en évidence que (i) l’aire native du nématode du pin est fortement structurée à fines échelles spatiales et présente une diversité génétique faible à modérée, suggérant un rôle important de la dérive génétique, non compensée par la dispersion, (ii) les populations européennes présentent une diversité génétique extrêmement faible, suggérant un seul évènement d’introduction en Europe, et que (iii) l’Amérique du Nord est la source la plus probable des populations envahissantes européennes, non le Japon et la Chine. Ce projet souligne l’intérêt que les nématologistes et les généticiens des populations ont à collaborer. La génétique des populations a en effet permis de clarifier l’histoire de l’invasion des populations européennes et ce modèle nématode, du fait de son cycle de vie complexe résultant en un cas extrême de faible diversité génétique, a permis de s’interroger sur des méthodes et analyses couramment utilisées en génétique des populations
In this project, we were interested in the invasion of the pinewood nematode, Bursaphelenchus xylophilus, a microscopic worm responsible for the pine wilt disease and causing the annual loss of millions of trees worldwide. Our global objective was to improve our knowledge on this case of invasion and particularly to clarify the invasion history of European populations. After developing the microsatellite markers needed for our study, we analysed the genetic diversity of samples of natural populations from both the native area and invaded areas thanks to population genetics methods. These analyses revealed that (i) the native area is strongly genetically structured at fine scales and displays a low to moderate genetic diversity, suggesting an important role of the genetic drift, not compensated by dispersal, (ii) the European populations exhibit an extremely low genetic diversity, indicating a unique event of introduction in Europe and (iii) North America is the most probable source of European populations compared to China and Japan. This project is finally a good example of the benefits of collaboration between nematologists and population geneticists. Population genetics allowed to clarify the invasion history of European populations and this “nematode” model, because of its complex life cycle resulting in an extreme case of low genetic diversity, provided the opportunity to question methodologies in population genetics that are routinely used

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Espada, Maria Margarida Saial Santos Guiomar. "Functional characterization of putative effectors in pinewood nematode, bursaphelenchus xylophilus". Doctoral thesis, Universidade de Évora, 2018. http://hdl.handle.net/10174/23097.

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Plant-parasitic nematodes cause huge economic and ecological losses in agriculture and forestry ecosystems worldwide. The migratory endoparasitic nematode Bursaphelenchus xylophilus is unique in having phytoparasitic and mycetophagous phases in its life cycle. During the phytoparasitic stage, the nematode migrates within pine trees feeding on the contents of cortex and xylem parenchymal cells. Interactions of the nematode with the plant host are mediated by effectors - secreted proteins originating from the pharyngeal gland cells. The main objective of this work was to identify and characterise nematode effector genes that play key roles in parasitism. Next-generation sequencing and bioinformatic analysis were used as a neutral approach to identify novel effectors. The transcriptome of B. xylophilus has been sequenced to compare gene expression in the mycetophagous and plant-parasitic stages to identify genes and morphological adaptions involved in plant parasitism. Additionally, transcripts from pharyngeal gland cells were sequenced. Analysis of the data revealed new parasitism-related proteins. A promoter DNA sequence motif was identified that is associated with expression in the pharyngeal gland cells, and was used to predict further effector sequences. A panel of 118 predicted effector genes with a signal peptide, at least one occurrence of the motif and that are upregulated in planta were identified. Functional data suggest that effectors are one key part of a multi-layered detoxification strategy deployed by B. xylophilus in order to protect itself from host defence responses. B. xylophilus secretes detoxification enzymes into the host, while simultaneously upregulating other detoxification enzymes within its digestive system. We showed that one of these enzymes – a glutathione S-transferase - has a protective activity against defence compounds produced by the host. These data represent the most comprehensive analysis of novel effectors from this nematode to date; Caracterização funcional de putativos effectors do nemátode da madeira do pinheiro, Bursaphelenchus xylophilus RESUMO: Os nemátodes fitoparasitas representam enormes perdas económicas e ecológicas na Agricultura e em sistemas florestais. O nemátode endoparasita migratório Bursaphelenchus xylophilus tem a característica única de ser fitófago e micófago, no seu ciclo de vida. Durante a fase parasítica, o nemátode migra dentro dos pinheiros, alimentando-se dos conteúdos das células do parenquima presentes no córtex e xilema. As interações do nemátode com a planta hospedeira são mediadas por effectors – proteínas secretadas com origem nas glândulas esofágicas. O objectivo principal deste trabalho foi a identificação e caracterização dos effectors do nemátode que têm um papel preponderante no parasitismo. Sequenciação de última geração e análises bioinformáticas foram usadas como uma abordagem neutra para identificar novos effectors. O transcriptoma do B. xylophilus foi sequenciado e a expressão dos genes foi comparada entre as fases micófaga e parasítica, para identificar os genes e adaptações morfológicas envolvidas no parasitismo. Adicionalmente, foram sequenciados os transcritos originários das glândulas esofágicas. A análise dos dados revelou novas proteínas de parasitismo. Foi identificado um motif de DNA no promotor, cuja sequência está associada à expressão nas glândulas esofágicas e que pode ser utilizado para predizer novos effectors. Foi identificado um conjunto de 118 novos genes effectors com sinal peptídeo, com pelo menos uma ocorrência do motif na região promotora e altamente expressos na planta. Os dados funcionais sugerem que os effectors são parte importante na estratégica de destoxificação, a diferentes níveis, estabelecida pelo nemátode para se proteger das respostas de defesa do hospedeiro. B. xylophilus secreta enzimas de destoxificação dentro do hospedeiro, enquanto simultaneamente expressa outras destas enzimas no seu sistema digestivo. Aqui demonstramos que uma destas enzimas - glutationa S-transferase – tem uma actividade protectora contra compostos de defesa produzidos pelo hospedeiro. Estes dados representam a análise mais completa de novos effectors deste nemátode encontrados até ao presente.

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Takemoto, Shuhei. "Studies on the virulence evolution of the pinewood nematode, Bursaphelenchus xylophilus". Kyoto University, 2007. http://hdl.handle.net/2433/136540.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第13121号
農博第1626号
新制||農||941(附属図書館)
学位論文||H19||N4247(農学部図書室)
UT51-2007-H394
京都大学大学院農学研究科地域環境科学専攻
(主査)教授二井一禎, 教授髙藤晃雄, 教授武田博清
学位規則第4条第1項該当

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Kikuchi, Taisei. "Studies on nematode parasitism genes of the pine wood nematode Bursaphelenchus xylophilus". Kyoto University, 2006. http://hdl.handle.net/2433/136647.

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Saeb, Amr T. M. "Phylogenetic and population genetic studies on some insect and plant associated nematodes". Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1158348092.

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Vieira, Paulo Cezanne Reis. "Assessment of the genetic diversity of the pinewood nematode, Bursaphelenchus xylophilus, in Portugal". Master's thesis, Universidade de Évora, 2007. http://hdl.handle.net/10174/16285.

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O nemátode da madeira do pinheiro (NMP), Bursaphelenchus xylophiius, tem uma extensa distribuição na América do Norte, e encontra-se atualmente distribuído ao longo da maioria dos territórios de Canadá e dos Estados Unidos. Durante o último século, esta espécie foi transportada pelo Homem para outras regiões do mundo (não-nativas), associadas com o comércio e o fluxo global de produtos de origem florestal. Atualmente, esta espécie invasiva está reportada para algumas regiões do SE asiático (China, Japão, Coreia e Taiwan) e mais recentemente para a Europa (Portugal). Devido ao impacto que este organismo agente da doença da murchidão dos pinheiros causa nas florestas nativas destas regiões esta espécie assume uma elevada importância económica a nível mundial Em Portugal, a distribuição do NMP encontra-se confinada a uma área restrita e limitada (500 000 ha), a sul de Lisboa (península de Setúbal); contudo, constitui uma das maiores ameaças às florestas de pinheiro do país e da UE. Ate recentemente, nenhum consenso existia quanto à origem do NMP em Portugal. Diversas hipóteses têm sido colocadas para explicar esta introdução, nomeadamente a partir de zonas onde o nematode ocorre naturalmente (América do Norte), ou de outras áreas (não-nativas) onde o nematode se comporta como uma espécie invasiva (Leste da Ásia). A fim de avaliar a variabilidade genética do NMP proveniente da área afetada em Portugal, foram utilizadas várias técnicas moleculares, designadamente o random amplified polymorphic DNA (RAPD-PCR) e o satellite DNA (satDNA). No caso do RAPD-PCR, foram utilizados 24 isolados do NMP provenientes de Portugal, 1 proveniente da América do Norte e 1 da Ásia, tendo sido utilizado como out-group um isolado de B. mucronatus. A partir dos 28 RAPD primers utilizados obtiveram-se 640 fragmentos. No caso do satDNA, foram utilizados 21 isolados do NMP provenientes de Portugal, obtendo-se no total 206 sequências da família MspI. Ambos os métodos revelaram uma elevada similaridade genética entre os vários isolados do NMP da área afetada em Portugal O nível reduzido de diversidade genética obtido entre os isolados portugueses do NMP, permite concluir que se trata de uma única introdução deste organismo em Portugal, e proveniente de uma região asiática. A inexistência de uma de correlação entre a variabilidade genética e a distribuição geográfica do NMP dentro da área afetada em Portugal, indica que o NMP se encontra distribuído de forma uniforme ao longo de toda a área afetada, provavelmente relacionado com a distribuição e a expansão natural do inseto vector. The pinewood nematode (PWN), Bursaphelenchus xylophilus, has a wide distribution in North America, and is present throughout most of the territories of Canada and the United Stata. During the last century, this species has been transported by man to several non-native regions of the world, associated with trade and the global flow of forest products. Up to date, this invasive species has been reported from Asia (PR China, Japan, Korea and Taiwan) and more recently in Europe (Portugal). Due to the impact on native pine forests of these regions, this nematode species, the causal agent of pine wilt disease, is of great economic importance worldwide. In Portugal, the distribution of the PWN has been constrained to a relatively small area (500 000 ha) in the south of Lisbon (Setúbal Peninsula); however, it has become the most serious threat to pine forests in the country. Until recently, no consensus had emerged on the possible pathway of the PWN introduction in Portugal. Several hypotheses have been put forward to explain this introduction, such as an origin from endemic areas where the nematode naturally occurs (North America), or non-endemic areas where the nematode behaves as an exotic pest (East Asia). Random amplified polymorphic DNA (RAPD-PCR) and satellite DNA (satDNA) techniques were used in order to assess the level of genetic variability and genetic relationships, among several isolates of the PWN, representative of the entire affected area in Portugal. In the case of RAPD-PCR, 24 Portuguese isolates, plus two additional isolates of B. xylophilus, representing North America and East Asia were included. B. mucronatus was used as an out-group. Twenty-eight random primers generated a total of 640 DNA fragments. With satDNA, 206 Mspl sequence repeats were obtained from 21 Portuguese isolates of B. xylophilus. Both molecular methods revealed a high genetic similarity among the Portuguese isolates, and the low level of genetic diversity strongly suggests that they were dispersed recently from a single introduction, and from East Asia. The lack of apparent relationship between the genetic variability and the geographic distribution of the PWN within the affected area, suggests that the recent introduction of this pest (and pathogen) in Portugal has been uniformly distributed since its establishment, probably following the natural distribution and expansion of the insect vector.

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Wilson, Matthew Stephen. "Feeding preference of pine sawyer beetle (Monochamus carolinensis) on Pinaceae and use of virtual plant walk maps as a tool for teaching plant identification courses". Diss., Kansas State University, 2016. http://hdl.handle.net/2097/34549.

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Doctor of Philosophy
Department of Horticulture, Forestry, and Recreation Resources
Jason Griffin
Feeding preference experiments with the pine sawyer beetle (Monochamus carolinensis Olivier) were conducted using eleven taxa of Pinaceae. One newly emerged adult beetle (≤ 24 hours) was placed into each feeding arena (n = 124) containing three or four shoots of current season's growth from different tree species (one shoot per species) for choice experiments. Beetles were allowed to feed for 48 (2011) or 72 (2012-2014) hours, at which point shoots were removed and data collected on feeding occurrence and percent feeding area. Augmented design analyses of feeding occurrence and percent feeding area of the eleven taxa did not indicate significant evidence for feeding preferences of the pine sawyer beetle on most taxa except for a higher preference for both scots (Pinus sylvestris L.) and eastern white (P. strobus L.) pines compared to deodar cedar [Cedrus deodara (Roxb. ex D. Don) G. Don]. The feeding preference experiments suggest that pine sawyer beetle may feed on a wide-range of Pinaceae taxa. Virtual plant walk maps were developed using a web-application for two semesters of an ornamental plant identification course (n = 87). The maps allowed students to revisit plants and information covered in lecture and laboratory sections at their own convenience, using either a computer or mobile device. Survey results indicated 63% of the students used the virtual plant walk maps as a study resource. Students mainly used the maps to study the most current plant list. Most students who used the virtual maps did so to review the plants online. When asked to rate usefulness of the maps on a scale from slightly useful (1) to very useful (3), 43% of students indicated that the virtual maps study tool was very useful, 25% indicated the maps were useful, and 8% indicated that the maps were slightly useful. A significant dependence between student use frequency and student usefulness ratings of virtual plant walk maps was observed. As students’ use of the virtual maps increased, they perceived the maps to be more useful to their studies in preparing for identification quizzes. No differences between plant identification quiz scores were observed between students who used and did not use the virtual plant walk maps or between learning styles. Our survey indicated students used the virtual plant walk maps as a resource and perceived the maps as a useful tool in preparation for identification quizzes.

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Vincent, Bruno. "Relations entre les nématodes du genre Bursaphelenchus, l'insecte vecteur Monochamus galloprovincialis et leurs arbres hôtes". Orléans, 2007. http://www.theses.fr/2007ORLE2058.

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Suite à la récente introduction du nématode du pin, Bursaphelenchus xylophilus, au Portugal, ses risques de propagation en France ont été étudiés. Premièrement des campagnes de captures d’insectes ont montré que l’insecte vecteur Monochamus galloprovincialis était présent sur 3 espèces de pins sensibles au nématode, qu’on le retrouvait majoritairement dans le Sud de la France, la température jouant un rôle important dans sa distribution. Les études sur la nématofaune du genre Bursaphelenchus spp, ont, tout d’abord, mis en évidence, avec l’aide de marqueurs moléculaires, une large distribution de B. Mucronatus en France aussi bien dans les pins hôtes que sur l’insecte vecteur. L’étude de son développement a confirmé la forte similitude de son cycle biologique avec celui de B. Xylophilus malgré un taux de croissance plus faible. Enfin une étude de compétition entre les 2 espèces a montré un avantage compétitif de B. Xylophilus sur B. Mucronatus dans les pins et sur l’insecte, en conditions contrôlées. L’ensemble de ces résultats a indiqué un risque important de dissémination du nématode du pin dans les pinèdes françaises s’il y était introduit.

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David, Guillaume. "Étude des capacités de dispersion de Monochamus galloprovincialis vecteur du nématode du pin Bursaphelenchus xylophilus". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0181/document.

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Le nématode du pin Bursaphelenchus xylophilus, originaire des Etats-Unis, est responsable de dépérissements massifs dans les forêts de pin des pays où il a été introduit. Il utilise comme vecteur un insecte du genre Monochamus, notamment M. galloprovincialis en Europe. L’objectif de cette thèse est de fournir des informations concernant les capacités de dispersion de ce coléoptère afin de mieux prédire le risque d'invasion. A l'aide d'expériences en manège de vol, nous avons montré que les adultes émergents, encore immatures, sont déjà en mesure de maintenir des vols soutenus. Ils peuvent parcourir une distance d'environ 500m par jour et les capacités de vol augmentent avec la prise de poids pendant la phase de maturation sexuelle. Il n'existe pas de compromis d'allocation de l'énergie entre fonctions de dispersion et de reproduction pendant cette période et nous proposons de qualifier ces insectes de "income breeder" et "capital disperser". A l'état mature M. galloprovincialis est capable de voler un total de 16 km, avec des vols individuels d'environ1 km; ces performances augmentent avec l'âge et le poids des insectes. Le maintien des capacités de vol tout au long de la vie adulte de M. galloprovincialis conduit à proposer que les distances potentiellement parcourues dépendent surtout de la longévité de l'insecte. Dans une expérience d'élevage en conditions contrôlées nous avons montré que la vie adulte dure au moins 4 mois, augmentant quand les fluctuations thermiques sont atténuées. Ces résultats ont des implications pour la gestion de B. xylophilus en Europe puisqu'ils démontrent que la méthode d'éradication par coupe rase sur un rayon de 500m est probablement inopérante
The pinewood nematode (PWN) Bursaphelenchus xylophilus, native to the USA, is responsible of the pine wilt disease, causing large economic losses in the pine forests of all countries where it has been introduced. It uses as vector an insect of the genus Monochamus, e.g. M.galloprovincialis in Europe The objective of this thesis is to provide information about the dispersalabilities of, this beetle in order to better predict the spread rate of the PWN. Using flight mill experiments, we showed that immature adult beetles were able to fly since their emergence. The meanflight performance was ca. 500m per day, increasing with weight gain during the maturation period.There was no trade-offs in energy allocation between reproduction and dispersion. We therefore suggest that M. galloprovincialis is both "income breeder" and "capital disperser". Mature beetles were able to fly a total of 16km on average during their lifetime, with individual flights of ca. 1km. Flight performances increased with age and body weight, being equal for males and females. Because flight capacity remained constant across time, we suggested that the total distance potentially covered by beetles was mainly driven by their longevity. In a rearing experiment under controlled conditions we estimated the adult lifespan at 4 months. It was reduced under temperature regime with higheryearly thermal fluctuations. These results have important implications for the management of the PWN since they demonstrate that precautionary clear-cuts of 500m radius are likely to be ineffective in eradicating the disease

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Más fuentes

Libros sobre el tema "Bursaphelenchus"

San hua ren shu xian chong xing tai he fen zi jian ding. Xiamen Shi: Xiamen da xue chu ban she, 2011.

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Mota, Manuel y Paulo Vieira, eds. The Pinewood Nematode, Bursaphelenchus xylophilus. BRILL, 2004. http://dx.doi.org/10.1163/9789047413097.

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W, Bowers W. y Canada. Forestry Canada. Newfoundland and Labrador Region., eds. Host and vector surveys for the pinewood nematode, Bursaphelenchus xylophilus (Steiner and Buhrer) Nickle (Nematoda: Aphelenchoididae) in Canada. St. John's: Forestry Canada, Newfoundland and Labrador Region, 1992.

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Manuel, Mota y Vieira P. 1977-, eds. The pinewood nematode, Bursaphelenchus Xylophilus: Proceedings of an international workshop, University of Évora, Portugal, August 20-22, 2001. Boston: Brill, 2004.

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Pinewood Nematode, Bursaphelenchus Xylophilus: Proceedings of an International Workshop, University Of Evora, Portugal August 20-22, 2001 (Nematology Monographs and Perspectives). Brill Academic Publishers, 2004.

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Capítulos de libros sobre el tema "Bursaphelenchus"

Haque, Ziaul y Mujeebur Rahman Khan. "Aphelenchidae: Aphelenchoides and Bursaphelenchus species." En Handbook of invasive plant-parasitic nematodes, 58–99. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789247367.0003.

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Abstract This chapter provides information on: geographical distribution; host plants; symptoms; biology and life cycle; economic importance; movement and means of dispersal; pest risk analysis; invasiveness rating; management measures; and detailed account of diagnosis procedures, such as morphological, biochemical, and molecular characterization, of Aphelenchoides and Bursaphelenchus species.

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Zhao, Lilin y Jianghua Sun. "Pinewood Nematode Bursaphelenchus xylophilus (Steiner and Buhrer) Nickle". En Biological Invasions and Its Management in China, 3–21. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3427-5_1.

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Mota, Manuel M., Kazuyoshi Futai y Paulo Vieira. "Pine Wilt Disease And The Pinewood Nematode, Bursaphelenchus Xylophilus". En Integrated Management of Fruit Crops Nematodes, 253–74. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-9858-1_11.

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Silva, Arinaldo Pereira da y Josineide Rodrigues da Costa. "AVALIAÇÃO DA DISTÂNCIA GENÉTICA ENTRE POPULAÇÕES DE Bursaphelenchus cocophilus". En O Fortalecimento Intensivo das Ciências Biológicas e suas Interfaces 2, 43–48. Atena Editora, 2021. http://dx.doi.org/10.22533/at.ed.3572128053.

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Gu, Jianfeng. "Systematic Identification of the Xylophilus Group in the Genus Bursaphelenchus". En Advances in Plant Pathology. InTech, 2018. http://dx.doi.org/10.5772/intechopen.77096.

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"CHAPTER 7: Pine Wilt and Red Ring, Lethal Plant Diseases Caused by Insect-Mediated Bursaphelenchus Nematodes". En Vector-Mediated Transmission of Plant Pathogens, editado por Natsumi Kanzaki y Robin M. Giblin-Davis, 87–107. The American Phytopathological Society, 2016. http://dx.doi.org/10.1094/9780890545355.007.

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Actas de conferencias sobre el tema "Bursaphelenchus"

Hongli Ge, Wei Jin y Huaqiang Du. "Automatic extraction of Bursaphelenchus xylophilus-induced sporadic death trees on unmanned airborne digital photographs". En 2008 International Workshop on Earth Observation and Remote Sensing Applications (EORSA). IEEE, 2008. http://dx.doi.org/10.1109/eorsa.2008.4620303.

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Jia, Wenhui, Xiangchao Kong, Xingrong Wang, Lulu Ren y Xiaowei Zhu. "A rapid β-Myrcene-attractant assisted wood sampling method for PCR-based detection of Bursaphelenchus xylophilus in Pinus massoniana wood tissue". En 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5966059.

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Liu, Yangming, Jiayan Zhuang, Jiangjian Xiao, Ningyuan Xu y Ying Zhu. "Application on Bursaphelenchu Identification in Customs Based on Neural Network with Pluggable Attention Module". En 2021 6th International Conference on Intelligent Computing and Signal Processing (ICSP). IEEE, 2021. http://dx.doi.org/10.1109/icsp51882.2021.9408885.

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