scholarly journals Стовбурова нематода Bursaphelenchus mucronatus як чинник всихання хвойних дерев у Карпатах і Поліссі

2018 ◽  
pp. 185-190
Author(s):  
M. Kozlovsky
Keyword(s):  
Bursaphelenchus Mucronatus

Досліджено, що стовбурова нематода Bursaphelenchus mucronatus зумовлює всихання верхівок сосни звичайної на Поліссі та ялини європейської в Українських Карпатах. Найбільшу чисельність нематод виявлено у стовбурі дерева нижче ділянки всихання. У деревині всохлих верхівок, окрім стовбурових нематод, іноді у великій кількості розмножуються бактеріофаги, які разом із бактеріями є першими агентами розкладання відмерлої деревини. Збільшення тривалості теплого періоду сприяє інтенсивнішому розвитку стовбурових нематод у деревині хвойних порід. У природних деревостанах смуги ялинових лісів на верхній межі лісу зареєстровано частіше їх трапляння у відмерлій деревині ялини. Наявність на значних площах вторинних монодомінантних деревостанів осередків всихання ялини європейської та сосни звичайної сприяє покращенню функціонуванню біотичної системи стовбурових нематод, а відтак і збільшенню їхньої шкодочинності та всихання дерев.  

Isolation of Bursaphelenchus mucronatus kolymensis from Monochamus nitens from Japan

Nematology ◽  
2014 ◽  
Vol 16 (6) ◽  
pp. 743-745 ◽  
Author(s):  
Natsumi Kanzaki ◽  
Natsumi Kanzaki ◽  
Mitsuteru Akiba
Keyword(s):  
Bursaphelenchus Mucronatus

Bursaphelenchus mucronatus. [Distribution map].

2009 ◽  
Author(s):  
Keyword(s):  
Hong Kong ◽  
North America ◽  
Far East ◽  
Distribution Map ◽  
Central Russia ◽  
Bursaphelenchus Mucronatus ◽  
Southern Russia ◽  
Northern Russia ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Bursaphelenchus mucronatus Mamiya & Enda, Nematode. Hosts: larch (Larix olgen [Larix gmelinii var. olgensis], L. sibirica), pines (Pinus spp.) and spruce (Picea spp.). Information is given on the geographical distribution in Europe (Austria, Belarus, Estonia, Finland, France, Mainland France, Germany, Greece, Mainland Greece, Italy, Mainland Italy, Latvia, Lithuania, Moldova, Norway, Poland, Russia, Central Russia, Far East, Northern Russia, Siberia, Southern Russia, Slovenia, Spain, Mainland Spain, Sweden, Switzerland, Ukraine), Asia (Armenia, Azerbaijan, China, Anhui, Guizhou, Hong Kong, Hunan, Jiangsu, Liaoning, Shandong, Yunnan, Zhejiang, Georgia, Japan, Hokkaido, Kazakhstan, Korea Republic, Taiwan, Thailand, Turkey), North America (Canada, Quebec).

scholarly journals New Insights into the Phylogeny and Worldwide Dispersion of Two Closely Related Nematode Species, Bursaphelenchus xylophilus and Bursaphelenchus mucronatus

PLoS ONE ◽  
2013 ◽  
Vol 8 (2) ◽  
pp. e56288 ◽  
Author(s):  
Filipe Pereira ◽  
Cláudia Moreira ◽  
Luís Fonseca ◽  
Barbara van Asch ◽  
Manuel Mota ◽  
...  
Keyword(s):  
Nematode Species ◽  
Bursaphelenchus Xylophilus ◽  
Bursaphelenchus Mucronatus

Boarding abilities of Bursaphelenchus mucronatus and B. xylophilus (Nematoda: Aphelenchoididae) on Monochamus alternatus (Coleoptera: Cerambycidae)

Nematology ◽  
2003 ◽  
Vol 5 (6) ◽  
pp. 843-849 ◽  
Author(s):  
Shota Jikumaru ◽  
Katsumi Togashi
Keyword(s):  
Pine Wilt Disease ◽  
Nematode Species ◽  
Bursaphelenchus Xylophilus ◽  
Insect Vector ◽  
Species Replacement ◽  
Monochamus Alternatus ◽  
Bursaphelenchus Mucronatus ◽  
Initial Load ◽  
Pine Trees ◽  
The Difference

Abstract Bursaphelenchus mucronatus is closely related to Bursaphelenchus xylophilus, the causative agent of pine wilt disease. Both nematodes are transmitted between host pine trees as the fourth-stage dispersal juveniles (JIV) by insect vectors. After the invasion of Japan by B. xylophilus, B. mucronatus, native to Japan, appears to have been replaced in the pine forests during the spread of the disease. To help understand this species replacement, the number of JIV carried by an insect vector (the initial nematode load) was compared between the two nematode species by using the beetle, Monochamus alternatus, in the laboratory. The initial load of B. mucronatus was significantly smaller than that of B. xylophilus although the number of third-stage dispersal juveniles (JIII) concentrated at the pupal chambers did not differ. Statistical analysis showed that the proportion of JIII moulting to JIV was the most important among three components explaining the difference in the initial load of B. mucronatus while the number of JIII concentrated at the pupal chamber was the most important for B. xylophilus. The phoretic affinity between the nematode and its vector is discussed in relation to its role in the species replacement.

Sperm development and structure in Bursaphelenchus mucronatus (Nematoda: Aphelenchoidea: Aphelenchoididae)

Nematology ◽  
2011 ◽  
Vol 13 (4) ◽  
pp. 395-407 ◽  
Author(s):  
Vladimir Yushin ◽  
Alexander Ryss
Keyword(s):  
Nuclear Envelope ◽  
Cell Body ◽  
Bipolar Cells ◽  
Unusual Feature ◽  
Phylogenetic Relations ◽  
Bursaphelenchus Mucronatus ◽  
Main Cell ◽  
Sperm Development ◽  
Mature Spermatozoa ◽  
Formation Of Complexes

AbstractSpermatogenesis in Bursaphelenchus mucronatus, described using TEM, is similar to that of the 'rhabditid' nematodes. The development includes formation of complexes of fibrous bodies (FB) and membranous organelles (MO) which appear in spermatocytes; the complexes dissociate in the spermatids; the immature sperm contains separate FB and MO and transformation continues only after activation in the female gonoduct. The spermatheca contains mature spermatozoa as bipolar cells subdivided into one large pseudopod and a main cell body containing a nucleus without a nuclear envelope, numerous mitochondria and peripheral membranous organelles opening to the exterior via pores. Pale reticulate bodies appearing in the B. mucronatus spermatids have no analogies in other nematode spermatogeneous cells. An unusual feature of B. mucronatus spermatozoa is the presence of a very large knob-like projection on each MO marking the pole which joins to the sperm plasmalemma to form a specific pore during in utero spermatozoon activation. The spermatogenesis of B. mucronatus resembles that of Aphelenchoides blastophthorus, although transparent vesicles in spermatids and spermatozoa, filopodia with microtubule-like fibres of immature spermatozoa, eccentric nucleus and multiple pseudopods of the mature spermatozoa distinguish spermatogenesis of the latter from the former. Spermatogenesis includes distinct cytomorphological features that may possibly be used to separate the Bursaphelenchus species and trace their phylogenetic relations.

scholarly journals First Report of the East-Asian Type of Bursaphelenchus mucronatus in Pinus sylvestris in Slovenia

Plant Disease ◽  
2005 ◽  
Vol 89 (9) ◽  
pp. 1015-1015
Author(s):  
G. Urek ◽  
S. Širca
Keyword(s):  
Pinus Sylvestris ◽  
East Asian ◽  
Abies Alba ◽  
Rflp Analysis ◽  
The European Union ◽  
Conifer Forest ◽  
Bursaphelenchus Mucronatus ◽  
Three Samples ◽  
Pine Trees ◽  
First Time

Bursaphelenchus mucronatus Mamiya & Enda, a nematode associated with aboveground tissues of pine trees, is very similar morphologically to the pine wood nematode (PWN), B. xylophilus, a devastating pest that has caused widespread losses to pine woods in some parts of Asia since the early 1900s. During 1999, B. xylophilus was identified for the first time in Europe in Portugal (3), leading to concern that pines and other conifers all over Europe might be endangered. To protect forests from PWN and other pests, the European Union and other countries now regulate the importation of all coniferous chips, sawn wood, and logs and also have organized surveys to determine the extend of PWN infestation. Slovenia has approximately 1,227,832 ha of forest that makes up more than 60% of the surface of the country. The percentage of conifers within forests is 47.9% and comprised mainly of Picea, Pinus, Abies, and Larix species (2). During the summers of 2002-2004, approximately 100 ha of conifer forests in Slovenia were surveyed for the presence of PWN. In total, 170 wood samples from dead and dying pine (Pinus sylvestris L., P. nigra Arnold), spruce (Picea abies L.), and fir (Abies alba Miller) were analyzed. B. xylophilus (Steiner & Buhrer) Nickle was not found in the area, but a closely related nematode, B. mucronatus, previously shown to be pathogenic on conifer seedlings (4), was isolated from samples of P. sylvestris. Of 34 P. sylvestris samples analyzed, B. mucronatus was found in three samples. Samples were taken from a conifer forest located in the central part of Slovenia near the international airport of Ljubljana. The species was identified morphologically and also characterized by polymerase chain reaction restriction (PCR)-fragment length polymorphism (RFLP) analysis on the basis of ITS-rDNA fragment patterns. According to RFLP patterns (1), the analyzed species was recognized as the East-Asian type of B. mucronatus. Beside these findings, the specimens of B. homanni (Braasch) and Bursaphelenchus sp. have also been found in Slovenia. The results of the survey show that PWN was not found in Slovenia, but three different species of the Bursaphelenchus genus were present. References: (1) H. Braasch et al. Nachrbl. Dtsch. Pflanzenschutzd. 51:312, 1999. (2) M. Jurc et al. Zb. Gozdarstva in Lesarstva 72:121, 2004. (3) M. M. Mota et al. Nematology 1:727, 1999. (4) J. R. Sutherland. Pine wilt nematode. Pages 19–20 in: Compendium of Conifer Diseases. E. M. Hansen and K. J. Lewis, eds. The American Phytopathological Society, St. Paul, MN. 1997.

scholarly journals Occurrence of the nematode Bursaphelenchus mucronatus Mamiya & Enda 1979 (Nematoda: Aphelenchoididae) in Finland.

Silva Fennica ◽  
1989 ◽  
Vol 23 (4) ◽  
Author(s):  
Jyrki Tomminen ◽  
Matti Nuorteva ◽  
Markku Pulkkinen ◽  
Jouni Väkevä
Keyword(s):  
Bursaphelenchus Mucronatus
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