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Phoretic miles of bark beetles are classic examples of commensal eclosymbionts. However, many such miles appear to have mutualisms with fungi that could themselves interact with beetles. We tested for indirect effects of phoretic mites on Dmdroctonus front&s, which auacks and kills pine trees in North America. Turson-emus mites are known LO carry ascospores(More)
The spruce beetle, Dendroctonus rufipennis, is an eruptive forest pest of significant economic and ecological importance. D. rufipennis has symbiotic associations with a number of microorganisms, especially the ophiostomatoid fungus Leptographium abietinum. The nature of this interaction is only partially understood. Additionally, mite and nematode(More)
1 The species assemblages and abundance of phoretic mites and nematodes associated with the elm bark beetles, Scolytus nzultistriatus and Scolytus pygmaeus, were studied in Austria. 2 A total of 3922 individual mites were recorded from 144 adults of S. multi-striatus and 178 adults of S. pygmaeus. The species spectrum was identical and the relative(More)
The Mexican pine beetle (XPB) Dendroctonus mexicanus, is recorded here for the first time as a new introduction for the United States (US). Individuals of XPB and its sibling species, the southern pine beetle (SPB) Dendroctonus frontalis, were found infesting the same logs of Chihuahua pine, Pinus leiophylla var. chihuahuana and those of several other pine(More)
The morphology of insect eyes often seems to be shaped by evolution to match their behaviour and lifestyle. Here the relationship between the nuptial flight behaviour of 10 Atta species (Hymenoptera: Fonnicidae) and the eye size of male and female alates, including the compound eyes, ommatidia facets, and ocelli were examined. These species can be divided(More)
Insect-fungal complexes provide challenging and fascinating systems for the study of biotic interactions between plants. plant pathogens, insect vectors and other associated organisms. The types of interactions among these organisms (mutualism. antagonism. parasitism. phoresy. etc.) are as variable as the range of organisms involved (plants, fungi, insects.(More)
Dutch elm disease (DED) is a destructive vascular wilt disease of elm (Ulmus) trees caused by the introduced Ascomycete fungus Ophiostoma novo-ulmi. In Europe, this DED pathogen is transmitted by elm bark beetles in the genus Scolytus. These insects carry phoretic mites to new, suitable habitats. The aim of this study was to record and quantify conidia and(More)
The Tarsonetnus minimax species-group is established for bark beetle commensals of the genus Tarsonetnus Canestrini and Fanzago, 1876. T. minimax Vitzthum 1926 is redescribed, and two new species, T. terebrans and T. typographi n, spp., are described and illustrated. A diagnostic key to the species is supplied. The systematic status of the species-group is(More)