| deladenus siricidicola, bedding (neotylenchidae) parasitism evaluation in adult sirex noctilio, fabricius, 1793 (hymenoptera: siricidae). | this work aimed to evaluate the deladenus siricidicola, bedding (neotylenchidae) parasitism in adults sirex noctilio, fabricius, 1793 (hymenoptera: siricidae). timber was sampled by cutting out pieces of 0.80 m in length in sirex noctilio attacked and deladenus siricidicola inoculated pinus taeda. longs were 15-20 cm in diameter, according to the tree age. samples were packed in gauze-cages, for daily observations, till s. noctilio adults emergence. the emerged insects were transported, in plast ... | 2000 | 11241969 |
| mapping invasive species risks with stochastic models: a cross-border united states-canada application for sirex noctilio fabricius. | nonindigenous species have caused significant impacts to north american forests despite past and present international phytosanitary efforts. though broadly acknowledged, the risks of pest invasions are difficult to quantify as they involve interactions between many factors that operate across a range of spatial and temporal scales: the transmission of invading organisms via various pathways, their spread and establishment in new environments. our study presents a stochastic simulation approach ... | 2009 | 19220798 |
| microsatellite discovery by deep sequencing of enriched genomic libraries. | robust molecular markers such as microsatellites are important tools used to understand the dynamics of natural populations, but their identification and development are typically time consuming and labor intensive. the recent emergence of so-called next-generation sequencing raised the question as to whether this new technology might be applied to microsatellite development. following this view, we considered whether deep sequencing using the 454 life sciences/roche gs-flx genome sequencing sys ... | 2009 | 19317665 |
| putative source of the invasive sirex noctilio fungal symbiont, amylostereum areolatum, in the eastern united states and its association with native siricid woodwasps. | two genotypes of the fungal symbiont amylostereum areolatum are associated with the invasive woodwasp sirex noctilio first found in north america in 2004. s. noctilio is native to europe but has been introduced to australasia, south america and africa where it has caused enormous losses in pine plantations. based on nucleotide sequence data from the intergenic spacer region (igs) of the nuclear ribosomal dna, the a. areolatum genotypes found in north america are most similar to genotypes found i ... | 2009 | 19716415 |
| test of nonhost angiosperm volatiles and verbenone to protect trap trees for sirex noctilio (hymenoptera: siricidae) from attacks by bark beetles (coleoptera: scolytidae) in the northeastern united states. | sirex noctilio f. (hymenoptera: siricidae) is an invasive woodwasp, currently established in northeastern north america. in other regions of the world, stressed trap trees are used to monitor populations of s. noctilio and to provide inoculation points for the biological control nematode deladenus siricidicola bedding. however, the operational use of trap trees for s. noctilio in north america may be compromised by the large community of native organisms that inhabit stressed and dying pine tree ... | 2010 | 21309230 |
| cellulose-degrading bacteria associated with the invasive woodwasp sirex noctilio. | sirex noctilio is an invasive wood-feeding wasp that threatens the world's commercial and natural pine forests. successful tree colonization by this insect is contingent on the decline of host defenses and the ability to utilize the woody substrate as a source of energy. we explored its potential association with bacterial symbionts that may assist in nutrient acquisition via plant biomass deconstruction using growth assays, culture-dependent and -independent analysis of bacterial frequency of a ... | 2011 | 21368904 |
| putative origin of clonal lineages of amylostereum areolatum, the fungal symbiont associated with sirex noctilio, retrieved from pinus sylvestris, in eastern canada. | the eurasian sirex noctilio-amylostereum areolatum complex was discovered and has become established close to the north american great lakes in the 2000s. this invasive forest insect pest represents a very high risk to native and exotic pines in north america. we investigated the geographical origin of clonal lineages of the fungal symbiont a. areolatum in the recently pest-colonized eastern canadian region by analyzing mitochondrial and nuclear sequence variations and comparing the genetic dive ... | 2011 | 21802055 |
| common mortality factors of woodwasp larvae in three northeastern united states host species. | very little is presently known about the natural enemies and mortality factors associated with siricids (hymenoptera: siricidae) in the united states of america (usa), especially those that may directly affect the woodwasp, sirex noctilio fabricius (hymenoptera: siricidae). s. noctilio is an invasive woodwasp, is considered a major economic pest of pine, and has a severe effect on north american pine species planted in the southern hemisphere. the mortality factors of siricid larvae were determi ... | 2012 | 23421560 |
| arboreal insects associated with herbicide-stressed pinus resinosa and pinus sylvestris used as sirex noctilio trap trees in new york. | in september of 2004, sirex noctilio f. (hymenoptera: siricidae) was detected in new york state and later found to be established over a larger area, including parts of southeastern canada and the northeastern united states. a key component of s. noctilio detection and management plans in other parts of the world where s. noctilio has become established are chemically girdled trap trees. trap tree usage in north america is confounded by the presence of diverse communities of organisms that inhab ... | 2012 | 23321081 |
| detection and identification of amylostereum areolatum (russulales: amylostereaceae) in the mycangia of sirex nigricornis (hymenoptera: siricidae) in central louisiana. | the woodwasp sirex noctilio f. (hymenoptera: siricidae) has become established in north america. a primary tactic for the management of s. noctilio in the southern hemisphere has been the development of a biological control agent, deladenus siricidicola bedding. this nematode has a bicyclic life cycle including a mycetophagous free-living and parasitic cycle. during oviposition, female sirex woodwasps inject a symbiotic fungus. because d. siricidicola only develops well on amylostereum areolatum ... | 2013 | 24468555 |
| growth of the sirex-parasitic nematode deladenus siricidicola on the white rot fungus amylostereum. | the kamona strain of the nematode deladenus siricidicola has been extensively used as a biological control agent against invasive sirex noctilio woodwasps in the southern hemisphere, where it sterilizes female hosts. in north america, a non-sterilizing (ns) strain of d. siricidicola, thought to have been introduced with s. noctilio, is commonly found parasitizing this invasive woodwasp. species of deladenus that parasitize sirex have a parasitic form, as well as a mycophagous form. the mycophago ... | 2016 | 26724378 |
| detection and identification of the invasive sirex noctilio (hymenoptera: siricidae) fungal symbiont, amylostereum areolatum (russulales: amylostereacea), in china and the stimulating effect of insect venom on laccase production by a. areolatum yql03. | the eurasian woodwasp sirex noctilio f. was first detected in daqing, heilongjiang province, in the northeast region of china in 2013. here, we investigated the s. noctilio's fungal symbiont, amylostereum areolatum, and insect venom produced in its acid (venom) gland. overall, seven out of 10 fungal isolates obtained from the mycangia of 10 adult s. noctilio females in this study were identified as a. areolatum. the remaining three isolates were identified as trichoderma viride, verticillium dah ... | 2015 | 26470239 |
| multilocus genotyping of amylostereum spp. associated with sirex noctilio and other woodwasps from europe reveal clonal lineage introduced to the us. | sirex noctilio is a woodwasp of eurasian origin that was inadvertently introduced to the southern hemisphere in the 1900s and to north america over a decade ago. its larvae bore in pinus spp. and can cause significant mortality in pine plantations. s noctilio is associated with a symbiotic white rot fungus, amylostereum areolatum, which females inject into trees when they oviposit and which is required for survival of developing larvae. we compared the genetic diversity of a. areolatum isolated ... | 2015 | 26058535 |
| sirex woodwasp: a model for evolving management paradigms of invasive forest pests. | the sirex woodwasp, sirex noctilio, and its fungal mutualist, amylostereum areolatum, together constitute one of the most damaging invasive pests of pine. despite a century of research and well-established management programs, control remains unpredictable and spread continues to new areas. variable success in managing this pest has been influenced by complex invasion patterns, the multilayered nature of biological interactions, the varying local ecologies, and microevolutionary population proce ... | 2015 | 25386723 |
| 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 ... | 2014 | 24308452 |
| lack of fidelity revealed in an insect-fungal mutualism after invasion. | symbiont fidelity is an important mechanism in the evolution and stability of mutualisms. strict fidelity has been assumed for the obligate mutualism between sirex woodwasps and their mutualistic amylostereum fungi. this assumption has been challenged in north america where the european woodwasp, sirex noctilio, and its fungal mutualist, amylostereum areolatum, have recently been introduced. we investigate the specificity of the mutualism between sirex and amylostereum species in canada, where s ... | 2013 | 23740297 |
| fidelity among sirex woodwasps and their fungal symbionts. | we report that associations between mutualistic fungi and their economically and ecologically important woodwasp hosts are not always specific as was previously assumed. woodwasps in the genus sirex engage in obligate nutritional ectosymbioses with two species of amylostereum, a homobasid\iomycete genus of white rot fungi. in the present study, the amylostereum species and genotypes associated with three species of sirex native to eastern north america and one relatively recent invasive sirex fr ... | 2013 | 23532503 |
| microbial symbionts shape the sterol profile of the xylem-feeding woodwasp, sirex noctilio. | the symbiotic fungus amylostereum areolatum is essential for growth and development of larvae of the invasive woodwasp, sirex noctilio. in the nutrient poor xylem of pine trees, upon which sirex feeds, it is unknown whether amylostereum facilitates survival directly through consumption (mycetophagy) and/or indirectly through digestion of recalcitrant plant polymers (external rumen hypothesis). we tested these alternative hypotheses for amylostereum involvement in sirex foraging using the innate ... | 2013 | 23224570 |
| dna sequence and rflp data reflect geographical spread and relationships of amylostereum areolatum and its insect vectors. | the white rot fungus, amylostereum areolatum (basidiomycetes), is best known for its symbiotic relationship with various siricid wood wasp species. in this study, the relationship between isolates of a. areolatum associated with two wood wasp species, sirex noctilio and s. juvencus, are considered to identify possible intraspecific groups. isolates from the northern (native) and southern (exotic) hemispheres are included to determine patterns of geographical spread and origin of introductions in ... | 2002 | 12207733 |
| interactions among latitude, nematode parasitization, and female sirex nigricornis (hymenoptera: siricidae) fitness. | sirex nigricornis f. (hymenoptera: siricidae) is an innocuous pine-inhabiting woodwasp native to eastern north america, utilizing dead or dying pine trees as hosts. although s. nigricornis f. does not cause economic damage, a closely related species, sirex noctilio, was discovered in new york in 2004 and has continually spread throughout the northeastern united states and southern canada, threatening the multi-billion-dollar pine timber industry of the southeastern united states and raising inte ... | 2016 | 28028099 |
| interactions among latitude, nematode parasitization, and female sirex nigricornis (hymenoptera: siricidae) fitness. | sirex nigricornis f. (hymenoptera: siricidae) is an innocuous pine-inhabiting woodwasp native to eastern north america, utilizing dead or dying pine trees as hosts. although s. nigricornis f. does not cause economic damage, a closely related species, sirex noctilio, was discovered in new york in 2004 and has continually spread throughout the northeastern united states and southern canada, threatening the multi-billion-dollar pine timber industry of the southeastern united states and raising inte ... | 2016 | 27590256 |
| phylogenetic analysis of deladenus nematodes parasitizing northeastern north american sirex species. | the parasitic nematode deladenus siricidicola is a biological control agent of the invasive woodwasp, sirex noctilio. since the discovery of s. noctilio in pine forests of northeastern north america in 2005, a biological control program involving the kamona strain of d. siricidicola has been under consideration. however, north american pine forests have indigenous sirex spp. and likely harbor a unique assemblage of associated nematodes. we assessed phylogenetic relationships among native deladen ... | 2013 | 23542205 |
| natural enemies associated with sirex noctilio (hymenoptera: siricidae) and s. nigricornis in ontario, canada. | sirex noctilio f. is an exotic woodwasp now found in eastern north america where it shares natural enemies with native woodwasps of pinus spp. to study the extent to which native hymenopteran parasitoids and parasitic nematodes could affect woodwasp populations, 60 pinus trees with symptoms of s. noctilio attack were felled in 2007 and 2008 in ontario, canada. each tree bole was cut into 1-m sections that were placed in individual rearing tubes; emergence was monitored from may to november of th ... | 2012 | 22507001 |
| identification of sirex noctilio (hymenoptera: siricidae) using a species-specific cytochrome c oxidase subunit i pcr assay. | sirex noctilio f. (hymenoptera: siricidae: siricinae), a new invasive species in china, is a significant international forestry quarantine pest. transportation of sirex in logs, and related wood packing materials, has led to environmental damage and substantial economic loss in many countries around the world. traditional morphological characteristics are not reliable for identification of the siricidae family, particularly the larvae. furthermore, specimens are frequently not in a suitable cond ... | 2016 | 27117170 |
| aerobic deconstruction of cellulosic biomass by an insect-associated streptomyces. | streptomyces are best known for producing antimicrobial secondary metabolites, but they are also recognized for their contributions to biomass utilization. despite their importance to carbon cycling in terrestrial ecosystems, our understanding of the cellulolytic ability of streptomyces is currently limited to a few soil-isolates. here, we demonstrate the biomass-deconstructing capability of streptomyces sp. sirexaa-e (acte), an aerobic bacterium associated with the invasive pine-boring woodwasp ... | 2013 | 23301151 |