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Heterorhabditis marelatusn. sp. (Rhabditida: Heterorhabditidae) from Oregon
Abstract A new species of the nematode genusHeterorhabditiswas found during a survey of soil entomopathogenic nematodes near Seaside, Oregon.Heterorhabditis marelatusn. sp. differs from other species
Effects of Bacillus thuringiensis toxins in transgenic cotton and potato on Folsomia candida (Collembola: Isotomidae) and Oppia nitens (Acari: Orbatidae)
Overall, transgenic toxin sources had no negative effects, but similar tests with cadmium as a positive control showed a concentration-rate response of decreased reproduction.
Molecular differentiation and phylogeny of entomopathogenic nematodes (rhabditida: heterorhabditidae) based on ND4 gene sequences of Mitochondrial DNA.
The molecular phylogeny of Heterorhabditis species support an existing taxonomy that is based largely on morphology and the sequence divergence of the ND4 gene permits species identification.
Colorado potato beetle control by application of the entomopathogenic nematode Heterorhabditis marelata and potato plant alkaloid manipulation
Heterorhabditis marelata is effective for controlling CPB in the field, and does not have negative non‐target effects on one of the most common endemic CPB control agents, Myiopharus doryphorae (Riley) (Diptera: Tachinidae), but the low rate of nematode reproduction cannot be manipulated through alkaloid stress to the beetle.
Life cycle variation and the genetic structure of nematode populations
Few data are available on population genetic structure in nematode species, and little of the available data allows direct comparison of the genetic structures of species having different life
Phylogeny of Photorhabdus and Xenorhabdus species and strains as determined by comparison of partial 16S rRNA gene sequences.
It is found that the genus Photorhabdus is coevolving with the nematodes and may be polyspecific, and at least two well-supportedTaxonomic grouping of the bacteria closely paralleled taxonom grouping of their nematode associates and their geographic origins.
Phylogenetic relationships of entomopathogenic nematodes (Heterorhabditidae and Steinernematidae) inferred from partial 18S rRNA gene sequences.
It is suggested that the partial 18S rRNA gene sequences may be too conserved for phylogenetic inference among Heterorhabditis species, but are well suited for phylogenetics inference within and among closely related families and genera of entomopathogenic nematodes.
Toxicity of peppermint monoterpenes to the variegated cutworm (Lepidoptera : Noctuidae)
Toxicity of five monoterpenes to the variegated cutworm, Peridroma saucia Hubner, was evaluated. Larvae fed for 6 d from the beginning of the fifth stadium on semi defined artificial diet fortified
Phylogenetie analysis of the genus Steinernema by morphologieal eharaeters and randomly anlplified polymorphie DNA fragments (1)
It is found that RAPD fragments were an effective means of differentiating species, but the divergence among species at this level was so great that these fragments may provide little information about the phylogenetic relationships among the species.