Life Sciences Commons^™

Effects Of Habitat Type And Drying On Ascogregarina Barretti (Eugregarinida : Lecudinidae) Infection In Aedes Triseritatus (Diptera : Culicidae), Stephen L. Van Rhein, Barry E. Flanary, Steven A. Juliano

Faculty Publications – Biological Sciences

The intensity and prevalence of parasitism by Ascogregarina barretti (Vavra) in aedes triseriatus (Say) did not differ between tires and tree holes in field samples taken in September 1996. There was significant variation in the intensity of parasitism among containers that was not significantly cor-related with the pH, conductivity, or temperature of the container water. In an experiment manipulating habitat drying, treatments had a significant effect on A. barretti infection of Ae. triseriatus, only during midsummer in one of two years. Containers maintained at maximal volume had the lowest prevalence of parasitism, and containers that dried out had the greatest …

Pest Risk Assessment For Importation Of Solid Wood Packing Materials Into The United States, Judith E. Pasek, Harold H. Burdsall Jr, Joseph F. Cavey, Andris Eglitis, Robert A. Haack, Dennis A. Haugen, Michael I. Haverty, Charles S. Hodges, Daniel R. Kucera, John D. Lattin, William J. Mattson, David J. Nowak, Joseph G. O'Brien, Richard L. Orr, Ronaldo A. Sequeira, Eugene B. Smalley, Borys M. Tkaxz, William E. Wallner

Judith E Pasek

A wide variety of exotic tree pests can readily be transported into the United States on untreated wooden pallets, crating, bracing, and other solid wood packing materials (SWPM). Recent introductions of forest pests associated with importation of SWPM demonstrate that current United States import regulations are inadequate to exclude such pests. Nearly all (97 percent) of the quarantine-significant tree pests found by port inspectors are associated with SWPM. In spite of current bark-free import requirements, about 9 percent of maritime shipments contain bark, which provides habitat for numerous organisms. A pest risk assessment was conducted for the SWPM pathway to …

Invertebrate Carcasses As A Resource For Competing Aedes Albopictus And Aedes Aegypti (Diptera : Culicidae), M P. Daugherty, B W. Alto, Steven A. Juliano

Faculty Publications – Biological Sciences

However, little is known of the role of these carcasses in other containers, which also receive leaf fall and stemflow inputs. This experiment investigated effects of accumulated invertebrate carcasses as a resource for two competing mosquitoes, Aedes albopictus (Skuse) and Aedes aegypti (L.) whether either species differentially benefited from accumulated carcasses, and if such a benefit affected interspecific competition. First, we measured accumulation of invertebrate carcasses in standard containers at a field site. We then used a replacement series with five different species ratios at the same total density: and varied the input of invertebrate carcasses [dead Drosophila melanogaster (Meigen) …

Pine Shoot Beetle (Tomicus Piniperda (L.)): Pest-Initiated Pest Risk Assessment For Likelihood And Consequences Of Spread Within The Continental United States, Judith E. Pasek

Judith E Pasek

This pest risk assessment for pine shoot beetle, Tomicus piniperda (L.), was conducted by the United States Department of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine (USDA-APHIS, PPQ). A need to reevaluate the appropriateness of current quarantine and compliance management regulations pertaining to the Lake States and northeastern United States was identified considering the high program costs and impacts to affected industries and growers. Questions central to this issue include predictions of what levels of damage or impact might be expected should the pine shoot beetle (PSB) spread to other regions of the United States, and …

Ec00-1564 A Guide To Identifying Nebraska Bumble Bee Species, Marion D. Ellis, Doug Golick

University of Nebraska-Lincoln Extension: Historical Materials

For more people, pollen means allergies and bees mean stings. However, you should thank a bee, butterfly, bat, bird, or other pollinator for one out of every three bites of food you eat. There are 95 crops grown in the United States that require insect pollinators. In addition, many bee-pollinated plants provide food for wildlife, increase soil fertility, and beautify our landscapes.

This extension circular discusses the importance of bees, capturing bees, making a reference collection, identification guide, and glossary.

Nf00-425 Resistance Management For European Corn Borer And Bt Transgenic Corn: Refuge Design And Placement (Revised October 2002), Thomas E. Hunt, G.W. Echtenkamp

University of Nebraska-Lincoln Extension: Historical Materials

One of the key issues surrounding the use of Bt transgenic corn hybrids is resistance management. These corn hybrids have been engineered to produce a version of the insecticidal protein from the naturally occurring soil bacterium, Bacillus thuringiensis (Bt), that is toxic to European corn borers and a few other insects.

This NebFact discusses the important principles of resistance management for European corn borer and Bt corn and refuge considerations.