Entomology Commons^™

Oviposition Pheromone In The Simulium Damnosum Complex: Biological Activity Of Chemical Fractions From Gravid Ovaries, P. J. Mccall, R. R. Heath, B. D. Dueben, M. D. Wilson

Entomology Papers from Other Sources

Communal oviposition in the Afrotropical blackfly species complex Simulium damnosum Theobald (Diptera: Simuliidae) is mediated by a pheromone emitted by freshly laid eggs. Previously, two compounds (designated peaks A and B) emanating from fresh eggs were shown to be associated with attractiveness to gravid blackflies in bioassay. The present study investigated the role of these compounds by testing the responses of wild-caught Simulium yahense in Ghana to fractionated hexane extracts of gravid ovaries prepared by gas chromatography (GC). Although the fractions were prepared from Sierra Leonean Simulium teonense, GC analysis of the emissions from fresh S. yahense eggs showed …

Pest Management Practices Of Crop Consultants In The Midwestern Usa, Robert Wright, Terry A. Devries, Shripat T. Kamble

Department of Entomology: Faculty Publications

A mail survey was conducted of independent crop consultants in 12 midwestern U.S. states working in corn (Zea mays L.), soybeans [Glycine max (L.) Merrill], wheat (Triticum aestivum L.), and grain sorghum (Sorghum bicolor L. Moench.) during 1993. The survey was conducted to document the acreage of crops monitored by crop consultants, and some of their operational characteristics. Kansas and Nebraska had the greatest reported acreage of crops scouted, over 3 million and 1 million acres, respectively. Total acres scouted were highest for corn, followed by soybeans, wheat, alfalfa (Medlcago sativa L.), and sorghum. Acres …

Bt Corn And European Corn Borer, K. R. Ostlie, W. D. Hutchison, R. L. Hellmich

Department of Entomology: Faculty Publications

Authors and Contributors: J.F. Witkowski, J.L. Wedberg, K.L. Steffey, P.E. Sloderbeck, B.D. Siegfried, M.E. Rice, C.D. Pilcher, D.W. Onstad, C.E. Mason, L.C. Lewis, D.A. Landis, A.J. Keaster, F. Huang, R.A. Higgins, M.J. Haas, M.E. Gray, K.L. Giles, J.E. Foster, P.M. Davis, D.D. Calvin, L.L. Buschman, P.C. Bolin, B.D. Barry, D.A. Andow & D.N. Alstad.

Bt Corn & European Corn Borer

Seed companies are now marketing Bt corn, one of the first tangible fruits of biotechnology that has practical implications for U.S. and Canadian corn farmers. Bt corn hybrids produce an insecticidal protein derived from the bacterium Bacillus thuringiensis, commonly called …

Seasonal Occurrence Of Rice Yellow Mottle Virus In Lowland Rice In Côte D’Ivoire, E. A. Heinrichs, A. A. Sy, S. K. Akator, I. Oyediran

Department of Entomology: Faculty Publications

Monthly plantings of the rice variety Bouaké 189 were made under lowland irrigated conditions, to obtain information on the phenological and seasonal occurrence of pests and diseases on the West African Rice Development Association (WARDA) research farm near Bouaké, Côte d’Ivoire. Regular sampling of insect pests and observations on rice yellow mottle virus (RYMV) disease infection throughout the year provided information on the occurrence of RYMV and potential insect vectors. RYMV incidence and grain yields varied depending on planting date, and for a given planting date, varied from one year to another. There was no evidence that RYMV incidence increases …

Fauna Entomologica De La Reserva Natural Bosawas, Nicaragua. Xi. Escarabajos (Coleoptera: Scarabaeidae) Nuevos Para La Fauna De Nicaragua., Jean-Michel Maes, Brett C. Ratcliffe, Mary Liz Jameson

University of Nebraska State Museum: Entomology Papers

In this note 18 species of Caleoptera Scarabaeidae are reported as new for the fauna of Nicaragua : Pelidnota hirsutiphallica RATCLIFFE & JAMESON, 1989; Isonychus ocellatus BURMEISTER, 1855; Anomala semitonsa BATES, 1888; Anomala specularis BATES, 1888; Anomala near caliigrapha BATES, 1888; Anornala near hispidula BATES, 1888; Trigonopeltastes geometric SCHAUM, 1841 ; Ligyrus gyas (ERICHSON, 1848); Cyclocephala confusa ENDRODI, 1966; Cyclocephala discolor HERBST, 1792; Cyclocephala erotylina ARROW. 1914; Cyclocephala stictica BURMEISTER, 1847; Gioscelis near columbica ENDRODI, 1 969; Stenocrates bicarinetus ROBINSON, 1 947; Stenocrates near hardyi DECHAMBRE, 1985; Stenocrates laevicollis KIRSCH, 1870; Onthophagus gazelle (FABRICIUS, 1787); Uroxys gorgon ARROW, 1933.

Mitochondrial Dna Variation Among Muscidifurax Spp. (Hymenoptera: Pteromalidae), Pupal Parasitoids Of Filth Flies (Diptera), David B. Taylor, Richard D. Peterson Ii, Allen L. Szalanski, James J. Petersen

Department of Entomology: Faculty Publications

Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and sequencing analyses were used to characterize an amplicon of ~625 bp in 4 of the 5 nominate species of Muscidifurax Girault & Sanders, pupal parasitoids of muscoid flies. A single polymorphic nucleotide site was observed among 2 samples of M. raptor Girault & Sanders. No sequence variation was observed among 3 samples of M. raptorellus Kogan & Legner. The sequence of M. uniraptor Kogan & Legner was identical to that of M. raptorellus. Nucleotide divergence among the Muscidifurax spp. ranged from 0.14 to 0.18 substitutions per nucleotide. Muscidifurax zaraptor Kogan & …

Control Of Solenopsis Invicta With Teflubenzuron, D. F. Williams, W. A. Banks, C. S. Lofgren

Entomology Papers from Other Sources

Teflubenzuron baits were active against laboratory colonies of the red imported fire ant, Solenopsis invicta Buren. Worker brood production ceased soon after treatment and by four weeks posttreatment, most colonies were devoid of brood. Worker ants did not exhibit any direct effects from treatment with teflubenzuron. As is typical with most insect growth regulators, colony mortality was slow and dependent on old- age attrition of the worker ants. A few (<25) female alates were produced in one of the laboratory colonies at 12 weeks posttreatment.

Host Plant Phenology And Dispersal By A Montane Butterfly: Causes And Consequences Of Uphill Movement, Merrill A. Peterson

Biology Faculty and Staff Publications

In the Wenatchee Mountains of central Washington State, populations of the lycaenid butterfly Euphilotes enoptes occur patchily with their sole host plant, Eriogonum compositum (Polygonaceae). Nearly all courtship and adult feeding occur on the inflorescences of this long-lived perennial. Furthermore, because females oviposit on inflorescences and larvae feed only on flowers and developing seeds, the window of opportunity for exploiting this resource is narrow. I demonstrated that inflorescence phenology varied according to the aspect and elevation of plant patches, and butterflies were most likely to occur in patches nearing full bloom. A mark–release–recapture study revealed that individual butterflies can disperse …

Problems With The Interpretation Of Mark-Release-Recapture Data In Subterranean Termites (Isoptera: Rhinotermitidae), Anthony D. Curtis, Deborah A. Waller

Biological Sciences Faculty Publications

The Lincoln index (Peterson method) is frequently used to estimate animal population size in mark-release-recapture studies. We tested the accuracy of this method to estimate termite colony size using logs infested with termites that were maintained in the laboratory. Termites were fed paper towels dyed either with 0.05% or 0.1% (w/w) of the dye marker Nile blue and released into their host logs in the laboratory. Following recapture a week later, estimates of termite population size for termites dyed with 0.05% Nile blue, and were approximately 3 times greater for termites dyed with 0.1% Nile blue. Concentrations of 0.1% Nile …

1996 Wild Blueberry Csrees Progress Reports/1996 Wild Blueberry Tax Reports, Alfred A. Bushway, Richard Work, Robert Stark, Huanli Zhang, Mary Ellen Camire, Susan Cheney, Rodney J. Bushway, L Brian Perkins, Frank A. Drummond, Constance S. Stubbs, Judith A. Collins, Paul E. Capiello, John M. Smagula, Scott Dunham, Walter Litten, David E. Yarborough, John Jemison, Timothy M. Hess, David Lambert

Wild Blueberry Research Reports

The 1996 edition of the Wild Blueberry CSREES Progress Reports/Wild Blueberry Tax Reports was prepared for the Maine Wild Blueberry Commission and the University of Maine Wild Blueberry Advisory Committee by researchers at the University of Maine, Orono. Projects in this report include:

Wild Blueberry CSREES Progress Reports:

1. Factors affecting the quality of Individually Quick Frozen (IQF) wild blueberries

2. Factors affecting the physical and chemical properties of IQF wild blueberries

3. Preventing the bleeding of blueberry fruit in bakery products

4. Amylase test development

5. Determination of pesticide residue levels in freshly harvested and processed wild blueberries

6. …

Winter Activity Patterns Of American Martens (Martes Americana): Rejection Of The Hypothesis Of Thermal-Cost Minimization, Gary S. Drew, John A. Bissonette

Green Canyon Environmental Research Area, Logan Utah

Despite their temperate to subarctic geographic range, American martens (Martes americana) possess a thermally inefficient morphology. The lack of morphological adaptations for reducing thermal costs suggests that marten may use behavioral strategies to optimize thermal budgets. During the winters of 1989-1990 and 1990-1991, we radio-collared and monitored the diel activity of 7 martens. A log-linear model suggested that the presence or absence of light was the only factor associated with marten activity patterns (p < 0.001). A regression of the percentage of active fixes on ambient temperature failed to detect an association (b = -4.45, p = 0.084, n = 12). Contents of marten seats suggested that their activity was consistent with the prey-vulnerability hypothesis. While martens must balance multiple life requisites, their activity patterns suggest that they accept increased thermal costs in order to increase foraging efficiency. However, the nocturnal activity of martens during winter was also consistent with the hypothesis that they may be able to limit their own exposure to predation risk. The nocturnal habits of Newfoundland martens in the winter were consistent with the hypothesis of avoidance of predation risk.

The Behavior Of The Horned Passalus Beetle, Odontotaenius Disjunctus (Illiger), Wendy Ellen Gotch

Dissertations, Theses, and Masters Projects

No abstract provided.