| tomicus piniperda (coleoptera: scolytidae) emergence in relation to burial depth of brood logs. | the pine shoot beetle, tomicus piniperda (l.), is an exotic pest of pines, pinus spp., that was first found in the united states in 1992. a federal quarantine currently regulates movement of pine christmas trees and pine nursery stock from infested to uninfested counties. the current national pine shoot beetle compliance management program requires t. piniperda-infested brood material to be disposed of by burning, chipping, or burial. the burial option requires that the infested pine material be ... | 2000 | 10826183 |
| tomicus piniperda (coleoptera: scolytidae) shoot-feeding characteristics and overwintering behavior in scotch pine christmas trees. | overwintering behavior of tomicus piniperda (l.) was studied in a scotch pine (pinus sylvestris l.) christmas tree plantation in indiana (1992-1994) and a plantation in michigan (1994). in general, adults feed inside shoots during summer, then move to overwintering sites at the base of trees in autumn. in early autumn, adults were most often found in shoot-feeding tunnels that were still surrounded by green needles, whereas few were in tunnels surrounded by yellow or brown needles. for all years ... | 2001 | 11332834 |
| effects of drought stress and high density stem inoculations with leptographium wingfieldii on hydraulic properties of young scots pine trees. | we examined drought-induced changes in susceptibility of potted scots pine (pinus sylvestris l.) trees to a bark-beetle associated fungus (leptographium wingfieldii morelet, from the bark beetle tomicus piniperda l.). five-year-old field-grown trees were transplanted to 50-l pots and grown for 1 year before the treatments were applied. trees in the drought treatment were subjected to several successive, 3-week-long drought cycles, with predawn water potential dropping below -2 mpa at peak drough ... | 2001 | 11340043 |
| population genetic structure of tomicus piniperda l. (curculionidae: scolytinae) on different pine species and validation of t. destruens (woll.). | genetic diversity and population structure of tomicus piniperda was assessed using mitochondrial sequences on 16 populations sampled on 6 pine species in france. amplifications of internal transcribed space 1 (its1) were also performed. our goals were to determine the taxonomic status of the mediterranean ecotype t. piniperda destruens, and to test for host plant or geographical isolation effect on population genetic structure. we showed that t. piniperda clusters in two mtdna haplotypic groups. ... | 2002 | 11918783 |
| [effect of temperature on resistance of pinus yunnanenensis to inoculation with leptographium yunnanense, a pathogenic fungus associated with tomicus piniperda]. | the study showed that temperature had an important effect both on the resistance of pinus yunnanensis and on the growth and virulence of leptographium yunnanense, a pathogenic fungus associated with tomicus piniperda attacking pinus yunnanensis, which would result in the competence variation between them: at lower (< 10 degrees c) and higher temperature(> 30 degrees c), the growth and virulence of l. yunnanense were inhibited, while at 15 degrees c-30 degrees c, the resistance of pinus yunnanens ... | 2003 | 14986380 |
| suitability 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, field and laboratory tests were conducted on several common and important southern and western species ... | 2004 | 15154468 |
| leptographium wingfieldii introduced into north america and found associated with exotic tomicus piniperda and native bark beetles. | leptographium wingfieldii is a well-known fungal associate of the pine shoot beetle, tomicus piniperda, in europe. this fungus is pathogenic to pines and is an important cause of blue-stain in the sapwood of infested trees. tomicus piniperda was first found in a christmas tree plantation in ohio, usa, 1992, but isolation of the fungi associated with these intercepted insects was not attempted. fungal strains resembling l. wingfieldii were recently isolated from pines attacked by t. piniperda, de ... | 2004 | 15209281 |
| a new leptographium species associated with tomicus piniperda infesting pine logs in korea. | during the course of a survey of sapstaining fungi in korea, a leptographium was isolated from pinus densiflora and p. koraiensis logs, infested with the bark beetle tomicus piniperda. the fungus grew optimally at 25 c on 2% malt extract agar and showed a high level of tolerance to cycloheximide. the leptographium has unusually short conidiophores and is morphologically similar to l. pini-densiflorae, l. lundbergii, l. yunnanense, and the leptographiumn anamorph of ophiostoma crassivaginatum. co ... | 2005 | 15912944 |
| characterization of the volatile fraction emitted by phloems of four pinus species by solid-phase microextraction and gas chromatography-mass spectrometry. | pine forests constitute some of the most important renewable resources supplying timber, paper and chemical industries, among other functions. characterization of the volatiles emitted by different pinus species has proven to be an important tool to decode the process of host tree selection by herbivore insects, some of which cause serious economic damage to pines. variations in the relative composition of the bouquet of semiochemicals are responsible for the outcome of different biological proc ... | 2006 | 16309694 |
| comparative population genetic study of two oligophagous insects associated with the same hosts. | a parallel study of the genetic structure of two oligophagous species associated with the same hosts was conducted to determine the main factors shaping the distribution of genetic diversity. the bark beetle tomicus piniperda and the pine processionary moth (ppm) thaumetopoea pityocampa are both associated with the genus pinus and belong to different guilds (xylophagous vs defoliating species). the ppm is an ectophagous species that feeds on the needles of living trees, whereas t. piniperda is e ... | 2006 | 16685280 |
| host selection in tomicus piniperda l.: composition of monoterpene hydrocarbons in relation to attack frequency in the shoot feeding phase. | the aim of this study was to investigate the host selection capacity of the pine shoot beetle, tomicus piniperda, in the shoot-feeding phase and analyze the chiral and non-chiral host volatiles by means of gc-ms and 2d-gc in five pinus species originating from france (pinus sylvestris, p. halepensis, p. nigra laricio, p. pinaster maritima, p. pinaster mesogeensis). dominating monoterpenes were (-)-alpha-pinene, (+)-alpha-pinene, (-)-beta-pinene and (+)-3-carene. the amounts of the enantiomers va ... | 2006 | 16869505 |
| influence of fungal infection and wounding on contents and enantiomeric compositions of monoterpenes in phloem of pinus sylvestris. | to identify chemical resistant markers induced by fungal or mechanical injury, young trees of scots pine (pinus sylvestris) were subjected to inoculations of blue stain fungi associated with the pine shoot beetles tomicus piniperda and t. minor. among the 20 trees selected for chemical analyses, 16 were divided into four groups: one as control and three were pretreated by wounding only, or by inoculation with either the blue stain fungus leptographium wingfieldii or ophiostoma canum. four wk aft ... | 2006 | 16900432 |
| quantitative association of bark beetles with pitch canker fungus and effects of verbenone on their semiochemical communication in monterey pine forests in northern spain. | the association between 11 species of bark beetles (coleoptera: scolytinae) and one weevil (coleoptera: entiminae) with the pitch canker fungus, fusarium circinatum nirenberg and o'donnell, was determined by crushing beetles on selective medium and histone h3 gene sequencing. pityophthorus pubescens (marsham) (25.00%), hylurgops palliatus (gyllenhal) (11.96%), ips sexdentatus (börner) (8.57%), hypothenemus eruditus westwood (7.89%), hylastes attenuatus erichson (7.40%), and orthotomicus erosus ( ... | 2007 | 17716465 |
| role of plant enemies in the forestry of indigenous vs. nonindigenous pines. | plantations of rapidly growing trees are becoming increasingly common because the high productivity can enhance local economies, support improvements in educational systems, and generally improve the quality of life in rural communities. landowners frequently choose to plant nonindigenous species; one rationalization has been that silvicultural productivity is enhanced when trees are separated from their native herbivores and pathogens. the expectation of enemy reduction in nonindigenous species ... | 2008 | 18686579 |
| complex postglacial history of the temperate bark beetle tomicus piniperda l. (coleoptera, scolytinae). | tomicus piniperda is an economically important pine bark beetle infesting european pinus spp. stands. we sequenced and analyzed 797 bp of the mitochondrial genome from individuals obtained from 34 populations sampled throughout the european range. we obtained 36 haplotypes, from which a haplotype network was constructed. in the iberian peninsula, high-genetic variability was detected with numerous endemic haplotypes. in contrast, the other european populations were less diverse with a single hap ... | 2009 | 19401712 |
| species composition, seasonal activity, and semiochemical response of native and exotic bark and ambrosia beetles (coleoptera: curculionidae: scolytinae) in northeastern ohio. | in 2007, we surveyed the alien and endemic scolytine (bark and ambrosia beetles) fauna of northeastern ohio, and for the most abundant species, we characterized their seasonal activity and response to three semiochemical baits. in total ,5,339 scolytine beetles represented by 47 species and 29 genera were caught in lindgren funnel traps. three species constituted 57% of the total catch, including xylosandrus germanus (blandford), tomicus piniperda (l.), and dryocoetes autographus (ratzeburg). of ... | 2010 | 20857727 |
| genetic study of the forest pest tomicus piniperda (col., scolytinae) in yunnan province (china) compared to europe: new insights for the systematics and evolution of the genus tomicus. | the pine shoot beetle tomicus piniperda is present throughout eurasia. in europe, it is considered as a secondary pest that rarely causes tree mortality, while heavy damage is observed in yunnan province (china) where it exhibits a novel aggregative behaviour during shoot attack. to understand why the ecological characteristics of the european and chinese populations differ so strongly, we conducted an analysis of population genetic structure on 12 populations in yunnan and one in jilin using mi ... | 2004 | 15280894 |