European Elm Bark Beetle and Dutch Elm Disease Control

1940 ◽  
Vol 33 (3) ◽  
pp. 556-558 ◽  
Author(s):  
E. P. Felt
Keyword(s):  
Disease Control ◽  
Bark Beetle ◽  
Dutch Elm Disease ◽  
European Elm Bark Beetle ◽  
Elm Bark Beetle

Scolytid Vectors of the Dutch Elm Disease in Ontario

1961 ◽  
Vol 93 (5) ◽  
pp. 403-405
Author(s):  
W. Y. Watson ◽  
W. L. Sippell
Keyword(s):  
Bark Beetle ◽  
Dutch Elm Disease ◽  
Scolytus Multistriatus ◽  
Forest Insect ◽  
Southern Ontario ◽  
European Elm Bark Beetle ◽  
Elm Bark Beetle ◽  
Insect Survey ◽  
Hylurgopinus Rufipes ◽  
Current Incidence

Although many possible vectors of the Dutch elm disease, Ceratocystis ulmi (Buism.) C. Moreau, have been listed by Collins et al. (1936) and others, only two, Scolytus multistriatus (Marsh.), the European elm bark beetle, and Hylurgopinus rufipes (Eichh.), the native elm bark beetle, are known to transmit the disease with any regularity. In this capacity alone thcse two species of beetles are important pests of elm. The persistent spread of the Dutch elm disease in southern Ontario (Hord and Quirke, 1955) made it imperative that adequate surveys be maintained to indicate yearly changes in the occurrence of the introduced vector, and to ascertain more precisely the distribution of the native vector relative to the distribution of elm in Ontario. Consequently the Forest Insect Survey of the Forest Insect Laboratory, Sault Ste. Marie, intensified its elm bark beetle program in 1956, and from then to 1959, 138 positive samples of these two scolytid beetles have been received. An analvsis of these records and their relationihip to the current incidence of the Dutch elm disease in Ontario are presented in this paper.

scholarly journals The change in the structure of hydrogen bonds in elm wood due to damage by European elm bark beetle Scolytus multistriatus (Marsham) (Coleoptera: Curculionidae, Scolytinae)

2018 ◽  
Author(s):  
Е.И. ИВАНОВА ◽  
В.И. ИВАНОВ-ОМСКИЙ ◽  
И.А. ДАВЫДОВА ◽  
Е.В. ГРИНЕНКО ◽  
Л.Л. ЛЕОНТЬЕВ ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Dutch Elm Disease ◽  
Scolytus Multistriatus ◽  
Hydroxyl Groups ◽  
Water Metabolism ◽  
Mechanical Destruction ◽  
European Elm Bark Beetle ◽  
Elm Bark Beetle

Водородная связь (Н-связь) обеспечивает необходимую гибкость и устойчивость биологических систем, в том числе древесины. Для исследования энергии и концентрации Н-связей в древесине возможно применение ИК-спектроскопии. В этом случае судить о природе гидроксильных групп можно опираясь на величины длин и энергий Н-связей, известных для водородных связей в целлюлозе, лигнине и других компонентах древесины, которые были исследованы ранее [Иванов-Омский и др., 2017; Иванова и др., 2016]. Особенный интерес представляет решение задачи об изменении прочности и иных свойств древесины при отмирании дерева в случае повреждения биологическими агентами. В данном исследовании поставлена задача – исследовать влияние повреждений короедов на структуру водородных связей древесины. Объектом исследования выбран вяз Ulmusglabra Huds, заселённый струйчатым заболонником. Этот короед является вектором распространения голландской болезни ильмовых в Санкт-Петербурге. Срезы для спектрального анализа взяты с поверхности заболони вяза, заселённого короедом. Полученные результаты показали, что на повреждённых заболонником участках происходит разрушение наиболее сильной межмолекулярной связи, обеспечивающей соединение молекул целлюлозы и, соответственно, прочность ствола. Увеличивается и концентрация внутримолекулярных связей, что может означать принципиальные изменения в водном обмене клеток древесины, связанные с разрушением аквапоринов. Это явление может быть связано с ответной реакцией вяза на нарушение движения растворов по сосудам при механическом разрушении древесины во время питания короедов и/или попаданием ферментов их слюнных желёз, амилазы или других карбогидраз. Не исключено попадание в древесину и других ферментов, например продуцируемых симбионтами короедов. Hydrogen bond (H-bond) provides the necessary flexibility and stability of biological systems, including wood. It is possible to use Infrared spectroscopy to study the energy and concentration of H-bonds in wood. In this case, it is possible to assess the nature of the hydroxyl groups based on the lengths and energies of H-bonds, known for hydrogen bonds in cellulose, lignin and other wood components, which had been studied earlier [Ivanov-Omskiy et al., 2017; Ivanova et al., 2016]. Of special interest is the solution of the problem of changing the strength and other properties of wood when the tree dies in case of damage by biological agents. In this paper, the task was to study the effect of damage by bark beetles on the structure of hydrogen bonds of wood. The object of research was elm Ulmus glabra Huds infested by the European elm bark beetle Scolytus multistriatus. This bark beetle is the vector of Dutch elm disease in St. Petersburg. Sections for spectral analysis are taken from the surface of the elm sapwood inhabited by bark beetle. The obtained results showed that on the sites damaged by the sapwood, the strongest intermolecular bond (which binds the cellulose molecules together and ensures the strength of the trunk) breaks down. The concentration of intramolecular bonds also increases. This means a fundamental change in the water metabolism of wood cells, associated with the destruction of aquaporins. This phenomenon may be related to the response of the elm to the violation of the movement of solutions through vessels during mechanical destruction of wood during the feeding of bark beetles and/or the ingestion of enzymes from their salivary glands, amylase or other carbohydrases. It is also possible that other enzymes (such as those produced by the beetles’ symbionts) come into contact with wood.

Scolytus multistriatus. [Distribution map].

1975 ◽  
Author(s):  
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Bark Beetle ◽  
Host Plants ◽  
Dutch Elm Disease ◽  
Scolytus Multistriatus ◽  
Distribution Map ◽  
Elm Bark Beetle ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Scolytus multistriatus (Marsham) (Col., Scolytidae) (Smaller Elm Bark-beetle) (A vector of Dutch elm disease). Host Plants: Ulmus spp. Information is given on the geographical distribution in EUROPE (excl. USSR), Austria, Belgium, Britain, Bulgaria, Corsica, Czechoslovakia, France, Germany, Greece, Hungary, Italy, Netherlands, Poland, Portugal, Rumania, Spain, Switzerland, Yugoslavia, ASIA (excl. USSR), Iran, USSR, AFRICA, Algeria, Egypt, NORTH AMERICA, Canada, U.S.A.

Bursaphelenchus michalskii sp. n. (Nematoda: Aphelenchoididae), a nematode associate of the large elm bark beetle, Scolytus scolytus Fabr. (Coleoptera: Curculionidae), in Dutch elm disease-affected elm, Ulmus laevis Pall.

Nematology ◽  
2019 ◽  
Vol 21 (3) ◽  
pp. 301-318
Author(s):  
Marek Tomalak ◽  
Anna Filipiak
Keyword(s):  
Body Length ◽  
Bark Beetle ◽  
Excretory Pore ◽  
Dutch Elm Disease ◽  
Molecular Profile ◽  
Male Body ◽  
Morphometric Characters ◽  
Scolytus Scolytus ◽  
Elm Bark Beetle ◽  
Ulmus Laevis

Summary Bursaphelenchus michalskii sp. n. is described from the bark of the European white elm, Ulmus laevis. All propagative stages of the nematode were found in larval galleries of the large elm bark beetle, Scolytus scolytus, and in overlapping gallery systems of this species and the small European elm bark beetle, S. multistriatus. Dauer juveniles of the new nematode are transmitted to new breeding trees under elytra of adult S. scolytus. Bursaphelenchus michalskii sp. n. is characterised by the female body length of 953 (838-1108) μm and male body length of 893 (811-971) μm, very slender body (a = 53.9 (46.1-58.5) and 60.9 (52.2-72.0) in female and male, respectively), lateral fields with three incisures (two bands), excretory pore usually located anterior to the median bulb, lack of vulval flap, long post-uterine sac, relatively small spicules 12.3 (10.8-13.3) μm long with no cucullus and with distinct, somewhat thorn-like, dorsally bent or reflexed condylus and a conical or digitate rostrum, and the arrangement of the seven male caudal papillae (i.e., a single precloacal ventromedian papilla (P1), one pair of adcloacal ventrosublateral papillae (P2) at or just anterior to cloacal slit, one ventrosublateral, postcloacal pair (P3) located at ca 60% of the tail length, posterior to cloacal slit, and one pair (P4) of ventrosublateral papillae located near the base of the bursa). The newly described species shares most of the key morphological characters with members of the eremus-group (sensu Braasch et al., 2009). However, B. michalskii sp. n. is unique amongst Bursaphelenchus species by a combination of female tail and spicule shape, excretory pore position, and other morphometric characters. These findings were confirmed by DNA sequencing and phylogenetic analysis of the 18S and 28S rDNA regions and by the unique molecular profile of the ITS region (ITS-RFLP).

Sign in / Sign up

Export Citation Format

Share Document