Life Sciences Commons^™

Asymmetrical Competition And Patterns Of Abundance Of Aedes Albopictus And Culex Pipiens (Diptera : Culicidae), Katie S. Costanzo, Kimberly Mormann, Steven A. Juliano

Faculty Publications – Biological Sciences

We tested for competitive advantage among larvae of Aedes albopictus (Skuse) and Culex pipiens L. in a laboratory experiment and determined the frequency and spatial and temporal patterns of co-occurrence in the field in East St. Louis, IL. In a laboratory competition experiment at multiple combined densities of Ae. albopictus and Cx. pipiens larvae, Ae. albopictus survivorship, and developmental times were significantly affected by conspecific densities but not by Cx. pipiens densities. In contrast, Cx. pipiens survivorship, and developmental times were significantly affected by both conspecific and Ae. albopictus densities. Per capita rate of increase (r') for Ae. albopictus cohorts …

Phylogeny And Biogeography Of Ice Crawlers (Insecta: Grylloblattodea): Evidence From Six Molecular Loci, Karl J. Jarvis

Theses and Dissertations

Ice crawlers (Insecta: Grylloblattodea) are rarely encountered insects that consist of five genera representing 26 species from North America and Asia. Asian grylloblattids are the most diverse, but North American ice crawlers (genus Grylloblatta) are known for their adaptation to cold conditions. Phylogenetic relationships among grylloblattid species and genera are not known. Late Pleistocene glaciations had a major effect on the current Grylloblatta distribution, because their specific habitat requirements restrict them to small geographical areas. Six genes were sampled in 37 individuals for 18S rRNA, 28S rRNA, histone 3, 12S rRNA, 16S rRNA, and cytochrome oxidase II (COII) from 27 …

Ec05-1573 Corn Insects Ii, Robert J. Wright, Terry A. Devries, James A. Kalisch

University of Nebraska-Lincoln Extension: Historical Materials

This two-page, 4-color extension circular covers information on Nebraska corn insects identification and management. These include: Western corn rootworm, Northern corn rootworm, seed corn maggot, wireworm, Southern corn leaf beetle, corn leaf aphid, twospotted spider mite, Banks grass mite, corn flea beetle, white grub, annual grub, three year grub, seed corn beetle, and chinch bug.

Ec05-1572 Corn Insects I, Robert J. Wright, Terry A. Devries, James A. Kalisch

University of Nebraska-Lincoln Extension: Historical Materials

This two-page, 4-color extension circular covers the identification and management of Nebraska corn insects. These include: European corn borer, Western bean cutworm, corn earworm, armyworm, fall armyworm, common stalk borer, and black cutworm.

Nf05-653 Pyemotes Itch Mites, James A. Kalisch, David L. Keith, Alberto R. Broce

University of Nebraska-Lincoln Extension: Historical Materials

Two North American Species of itch mites — the straw itch mite and the "oak leaf gall mite" (Family Pyemotidae) — are found in Nebraska and Kansas. The straw itch mite was known in the early 1900s as a nuisance pest after farm workers handled small grains. Wheat, oats, and barley were often infested with insects on which the itch mites fed, allowing them to reach large numbers by harvest. The oak leaf gall mite recently discovered in galls on pin oaks in Lincoln, Neb., and Manhattan, Kan., is believed to be a relatively recent introduction to the United States. …

Nf05-634 Fungicides To Manage Soybean Rust: What Are The Product Differences?, Loren J. Giesler, Thomas J. Weissling

University of Nebraska-Lincoln Extension: Historical Materials

If Nebraska soybean producers find themselves needing to apply a fungicide for soybean rust this year, it will be important to choose an effective product based on the stage of disease development in the specific field. It will be important for all producers and crop managers to be aware of where soybean rust is being detected to pursue a treatment that provides the maximum return on investment for any fungicides being applied.

This NebFact discusses the fungicides available for Nebraska soybean fields and resistance management issues.