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Articles 1 - 6 of 6

Full-Text Articles in Biochemistry, Biophysics, and Structural Biology

Comparison Of Reproductive And Flight Capacity Of Loxostege Sticticalis (Lepidoptera: Pyralidae), Developing From Diapause And Non-Diapause Larvae, Daosong Xie, Lizhi Luo, Thomas W. Sappington, Xingfu Jiang, Lei Zhang Oct 2012

Comparison Of Reproductive And Flight Capacity Of Loxostege Sticticalis (Lepidoptera: Pyralidae), Developing From Diapause And Non-Diapause Larvae, Daosong Xie, Lizhi Luo, Thomas W. Sappington, Xingfu Jiang, Lei Zhang

Entomology Publications

The beet webworm, Loxostege sticticalis (L.) (Lepidoptera: Pyralidae), uses both diapause and migration as life history strategies. To determine the role of diapause plays in the population dynamics of L. sticticalis, the reproductive and flight potentials of adults originating from diapause and nondiapause larvae were investigated under controlled laboratory conditions. Preoviposition period, lifetime fecundity, and daily egg production of females originating from diapause larvae were not significantly different from those originating from nondiapause larvae, showing that diapause has no significant effect on reproductive capacity when adults are provided with an adequate carbohydrate source. However, females that developed from diapause larvae ...


Relationship Of Flight And Reproduction In Beet Armyworm, Spodoptera Exigua (Lepidoptera: Noctuidae), A Migrant Lacking The Oogenesis-Flight Syndrome, Xing Fu Jiang, Li Zhi Luo, Thomas W. Sappington Nov 2010

Relationship Of Flight And Reproduction In Beet Armyworm, Spodoptera Exigua (Lepidoptera: Noctuidae), A Migrant Lacking The Oogenesis-Flight Syndrome, Xing Fu Jiang, Li Zhi Luo, Thomas W. Sappington

Entomology Publications

The beet armyworm, Spodoptera exigua, undertakes long-distance migration. We used flight mills to investigate the interaction between flight and reproduction in this species given the apparent absence of the oogenesis-flight syndrome. This syndrome, common in many migratory insects, is characterized by a suite of traits including migration during the pre-oviposition period followed by a switch to oogenesis. No negative effects of inter-ovipositional flight on lifetime fecundity were observed. Instead, adult reproductive output suffered when female flight was initiated the first day after eclosion and before oviposition, suggesting that migratory flight overlaps with the oviposition period rather than being confined to ...


Western Corn Rootworm (Diabrotica Virgifera Virgifera Leconte) Population Dynamics, Lance J. Meinke, Thomas W. Sappington, David W. Onstad, Thomas Guillemaud, Nicholas J. Miller, Judit Komáromi, Nora Levay, Lorenzo Furlan, József Kiss, Ferenc Toth Feb 2009

Western Corn Rootworm (Diabrotica Virgifera Virgifera Leconte) Population Dynamics, Lance J. Meinke, Thomas W. Sappington, David W. Onstad, Thomas Guillemaud, Nicholas J. Miller, Judit Komáromi, Nora Levay, Lorenzo Furlan, József Kiss, Ferenc Toth

Entomology Publications

The western corn rootworm Diabrotica virgifera virgifera LeConte is a major insect pest of field maize, Zea mays L. Larvae can cause substantial injury by feeding on maize roots. Larval feeding may destroy individual roots or root nodes, and reduce plant growth, stability, and yield. Costs associated with managing corn rootworms in continuous maize are annually one of the largest expenditures for insect management in the United States Corn Belt. Even though D. virgifera virgifera has been studied intensively for over 50 years, there is renewed interest in the biology, ecology, and genetics of this species because of its ability ...


Book Review: Insect Physiology And Biochemistry. Second Edition. Crc Press, Boca Raton., Russell A. Jurenka Dec 2008

Book Review: Insect Physiology And Biochemistry. Second Edition. Crc Press, Boca Raton., Russell A. Jurenka

Entomology Publications

Insect physiology is a specialized discipline within the larger framework of animal physiology. Almost every graduate program in Entomology has a requirement for an insect physiology course and an up to date textbook is required. Students using insects as model organisms should also be interested in this textbook. The textbook primarily describes physiology but there is quite a bit of biochemistry, which adds to the text as a resource. Physiology and biochemistry should be taught together; in order to understand physiology the biochemistry behind the physiology must also be understood. This 2nd edition textbook does a nice job of ...


Evidence For Obligate Migratory Flight Behavior In Young European Corn Borer (Lepidoptera: Crambidae) Females, David L. Dorhout, Thomas W. Sappington, Marlin E. Rice Oct 2008

Evidence For Obligate Migratory Flight Behavior In Young European Corn Borer (Lepidoptera: Crambidae) Females, David L. Dorhout, Thomas W. Sappington, Marlin E. Rice

Entomology Publications

European corn borer, Ostrinia nubilalis, flight behavior was examined in laboratory experiments. Adults were each tethered to 1 of 16 round-about flight mills in an environmental chamber, and the data were relayed to a computer. Parameters analyzed included duration, distance, and speed of the longest continuous flight and total flight time during an 8-h night. Comparisons were made between unmated and mated adults of both sexes at different ages up to 5 d after emergence. For unmated females, duration of the longest flight was highest the first night after emergence, declining significantly by 5 d of age. In contrast, duration ...


Effect Of Carbon Dioxide On The Molting Activity Of Two Tick Species In The Laboratory, Kenneth H. Holscher, R. W. Barker Sep 1983

Effect Of Carbon Dioxide On The Molting Activity Of Two Tick Species In The Laboratory, Kenneth H. Holscher, R. W. Barker

Entomology Publications

The effects of carbon dioxide concentration on the molting activity of Amblyomma americana (L.), and Amblyomma maculatum Koch were investigated. In both species, replete nymphs held in humidity chambers at a high carbon dioxide concentration (ca. 900 pp,) had a 2-4 day delay in peak ecdysis when compared to nymphs held at a low carbon dioxide concentration (ca. 400 ppm). In contrast, replete larvae showed no apparent delay in peak ecydsis [sic.] as a result of increased carbon dioxide concentration. Percent total eclosion was not affected by carbon dioxide concentration in either nymphs or larvae.