distinguishing ophiostoma ips and ophiostoma montium, two bark beetle-associated sapstain fungi.two synonymous sapstain species, ophiostoma montium and ophiostoma ips, which are vectored by dendroctonus ponderosae and various bark beetles, respectively, were differentiated into separate species using growth and molecular characteristics. analysis of 32 isolates of the two species from different countries showed that o. ips was able to grow at 35 degrees c while o. montium was not. this growth-based differentiation was strongly supported by sequence data for the internal transcribed spacer ...200312770706
high intercontinental migration rates and population admixture in the sapstain fungus ophiostoma ips.ophiostoma ips is a common fungal associate of various conifer-infesting bark beetles in their native ranges and has been introduced into non-native pine plantations in the southern hemisphere. in this study, we used 10 microsatellite markers to investigate the population biology of o. ips in native (cuba, france, morocco and usa) and non-native (australia, chile and south africa) areas to characterize host specificity, reproductive behaviour, and the potential origin as well as patterns of spre ...200717181723
ophiostoma species (ascomycetes: ophiostomatales) associated with bark beetles (coleoptera: scolytinae) colonizing pinus radiata in northern spain.bark beetles (coleoptera: scolytinae) are known to be associated with fungi, especially species of ophiostoma sensu lato and ceratocystis. however, very little is known about these fungi in spain. in this study, we examined the fungi associated with 13 bark beetle species and one weevil (coleoptera: entiminae) infesting pinus radiata in the basque country of northern spain. this study included an examination of 1323 bark beetles or their galleries in p. radiata. isolations yielded a total of 920 ...200717668036
parasitoids and dipteran predators exploit volatiles from microbial symbionts to locate bark location by parasitoids and dipteran predators of bark beetles is poorly understood. unlike coleopteran predators that locate prey by orienting to prey pheromones, wasps and flies often attack life stages not present until after pheromone production ceases. bark beetles have important microbial symbionts, which could provide sources of cues. we tested host trees, trees colonized by beetles and symbionts, and trees colonized by symbionts alone for attractiveness to hymenopteran parasitoids a ...200818348806
dna sequence comparisons of ophiostoma spp., including ophiostoma aurorae sp. nov., associated with pine bark beetles in south africa.bark beetles (coleoptera: scolytinae) are well-recognized vectors of ophiostoma species. three non-native bark beetle species infest various pinus species in south africa, and they are known to carry at least 12 different species of ophiostomatoid fungi. some of these fungi have not been identified to species level. the aim of this study was to determine or confirm the identities of ophiostoma species associated with bark beetles in south africa using comparisons of dna sequence data. identities ...200618490985
leptographium tereforme sp. nov. and other ophiostomatales isolated from the root-feeding bark beetle hylurgus ligniperda in california.the redhaired pine bark beetle hylurgus ligniperda (f.) is native to europe but was discovered in los angeles, california, in 2003. this root-and stump-feeding beetle is a common vector of ophiostomatales, which are potential tree pathogens or causes of blue stain of conifer sapwood. in this study ophiostomatales were isolated on a cycloheximide-amended medium from 118 adult h. ligniperda collected from infested logs of pinus halepensis and p. pinea at two sites in california. in total eight spe ...201020943533
fungal associates of the lodgepole pine beetle, dendroctonus murrayanae.bark beetles are well known vectors of ophiostomatoid fungi including species of ophiostoma, grosmannia and ceratocystis. in this study, the most common ophiostomatoid fungi associated with the lodgepole pine beetle, dendroctonus murrayanae, were characterized. pre-emergent and post-attack adult beetles were collected from lodgepole pines at four sites in british columbia, canada. fungi were isolated from these beetles and identified using a combination of morphology and dna sequence comparisons ...201121553309
the bark beetle, ips grandicollis, disrupts biological control of the woodwasp, sirex noctilio, via fungal symbiont interactions.the corticoid fungus, amylostereum areolatum, is deposited in pine trees by the woodwasp, sirex noctilio, at the time of oviposition. this fungus is essential in s. noctilio larval growth and it is also a food source for beddingia siricidicola, the nematode used for s. noctilio biological control. in recent years, the historically successful biological control programme has been disrupted in australia by the bark beetle, ips grandicollis. this study investigated whether the mechanism of this dis ...201424308452
ophiostoma ips from pinewood nematode vector, japanese pine sawyer beetle (monochamus alternatus), in korea.japanese pine sawyer beetle (monochamus alternatus) is an economically important pest in coniferous trees. ophiostoma ips was isolated from the beetle and identified based on analysis of morphological properties and the β-tubulin gene sequence. the fungus easily produced perithecia with a long neck on malt extract agar and its ascospores were rectangular shaped. this is first report of ophiostoma species associated with the pinewood nematode vector beetle in korea.201323610541
the ratio and concentration of two monoterpenes mediate fecundity of the pinewood nematode and growth of its associated fungi.the pinewood nematode (pwn) bursaphelenchus xylophilus, vectored primarily by the sawyer beetle, monochamus alternatus, is an important invasive pest and causal agent of pine wilt disease of chinese masson pine, pinus massoniana. previous work demonstrated that the ratios and concentrations of α-pinene:β-pinene differed between healthy trees and those trees containing blue-stain fungus (and m. alternatus pupae). however, the potential influence of the altered monoterpene ratios and concentration ...201222363713
ophiostomatoid fungi including two new fungal species associated with pine root-feeding beetles in northern spain.many bark beetles live in a symbiosis with ophiostomatoid fungi but very little is known regarding these fungi in spain. in this study, we considered the fungi associated with nine bark beetle species and one weevil infesting two native tree species (pinus sylvestris and pinus nigra) and one non-native (pinus radiata) in cantabria (northern spain). this included examination of 239 bark beetles or their galleries. isolations yielded a total of 110 cultures that included 11 fungal species (five sp ...201425253585
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