Susceptibility of defoliated Scots pine to spontaneous and induced attack by Tomicus piniperda and Tomicus minor
نویسندگان
چکیده
منابع مشابه
Susceptibility of Defoliated Scots Pine to Spontaneous and Induced Attack by Tomicus piniperda and Tomicus minor
In 1990–1991, Diprion pini extensively defoliated Scots pine (Pinus sylvestris L.) trees in Lauhanvuori National Park in southwestern Finland. Many trees lost all their foliage, while others had ca. 10 % foliage left after the second year of defoliation. Outside the national park, many nearby stands were also heavily defoliated in 1990, but were sprayed with diflubenzuron (Dimilin®) in 1991. Th...
متن کاملInfection, course of disease and effects of Canningia tomici in Tomicus piniperda and Tomicus minor (Coleoptera: Curculionidae)
Background and purpose. The pine shoot beetles Tomicus piniperda and Tomicus minor are secondary tree pests attacking weakened Pinus sylvestris and Pinus nigra. Outbreaks occasionally occur, causing considerable economic damage. The microsporidian pathogen Canningia tomici infects T. piniperda as its principal host. Bioassays were used to study the infectivity, vertical transmission, and effect...
متن کاملSimulation of the mate-finding behaviour of pine shoot beetles, Tomicus piniperda
An algorithm for animal searching behaviour was constructed that allows independent variation at random of movement parameters such as speed, duration, step size, and maximum right or left turn angle. The area, radius of the object searched for, and number of objects and searchers can also be varied. A capture algorithm is presented that can determine whether a searching animal intercepts a cir...
متن کاملGenetic relatedness of North American populations of Tomicus piniperda (Coleoptera:Scolytidae).
We used DNA fingerprinting by random amplified polymorphic (RAPD) DNA and electrophoretic characterization of esterase isozymes to investigate the genetic relatedness of North American populations of the exotic bark beetle Tomicus piniperda (L.). Cluster analyses of genetic distances among populations identified the Illinois population as an outlier population with mean genetic distances to oth...
متن کاملSuitability of some southern and western pines as hosts for the pine shoot beetle, Tomicus piniperda (Coleoptera: Scolytidae).
The pine shoot beetle, Tomicus piniperda (L.), is an exotic pest that has become established in North America. Discovered in Ohio in 1992, it has since been found in at least 13 states and parts of Canada. The beetle can cause significant growth loss in pines, and it represents a potential threat to trees in areas where it has not yet become established. To evaluate this threat to native pines,...
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ژورنال
عنوان ژورنال: Silva Fennica
سال: 1999
ISSN: 2242-4075
DOI: 10.14214/sf.660