A5022193269- Nuclear physics research studies
- Forensic Entomology and Diptera Studies
- Insect behavior and control techniques
- Insect and Pesticide Research
- Insect Resistance and Genetics
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Advanced NMR Techniques and Applications
- Insect Utilization and Effects
- Advanced Chemical Physics Studies
- Insect Pest Control Strategies
- CRISPR and Genetic Engineering
- Vector-Borne Animal Diseases
- Diptera species taxonomy and behavior
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Entomopathogenic Microorganisms in Pest Control
- Insect-Plant Interactions and Control
- Insect symbiosis and bacterial influences
- Rare-earth and actinide compounds
- Animal Genetics and Reproduction
- Viral Infectious Diseases and Gene Expression in Insects
- X-ray Spectroscopy and Fluorescence Analysis
- Radioactive Decay and Measurement Techniques
- Hemiptera Insect Studies
University of Cologne
1994-2022
Knipling-Bushland U.S. Livestock Insects Research Laboratory
2011-2020
United States Department of Agriculture
2009-2020
University of Nebraska–Lincoln
1996-2014
Agricultural Research Service
1991-2014
Center for Medical, Agricultural and Veterinary Entomology
2009
Foreign Agricultural Service
2008
Tuxtla Gutierrez Institute of Technology
2007
Helmholtz-Zentrum Dresden-Rossendorf
1996-2002
University of Göttingen
1991-1994
Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), the fall armyworm is most economically important maize pest in western hemisphere. This research focused on genetic variability of host strain because there a lack information this area S. research. Amplified fragment length polymorphism (AFLP) was used to assess over large geographic area. Twenty populations were collected from maize, one population princess tree, lemon and bermudagrass. The 23 Mexico, continental United States,...
Differences in weight gains caused by stable flies, Stomoxys calcitrans (L.), on grazing yearling steer/calves averaged 0.2 kg per steer a 3-yr study canyon range pastures West Central Nebraska. Stable fly numbers 0.85 front leg treated calves and 3.64 control calves. In 2 of the 3 yr after trials were completed, placed feedlot fed finishing ration. Compensatory gain did not occur stress was removed.
The New World screwworm, Cochliomyia hominivorax, is a devastating pest of livestock endemic to subtropical and tropical regions the Western hemisphere. larvae this species feed on tissue living animals, including man, can cause death if untreated. Over 60 years ago, sterile insect technique (SIT) was developed with aim eradicating pest, initially from Florida but subsequently all North Central America. From outset it appreciated that SIT would be more efficient only males were released in...
Abstract New World screwworms, C ochliomyia hominivorax ( oquerel) D iptera: alliphoridae: hrysomyinae), are devastating pests of warm‐blooded animals that cause significant economic damage to livestock. The successful campaign eradicate screwworms from continental N orth A merica, led by the US Department Agriculture and using sterile insect technique, continues receive research support has resulted in improved technologies for all aspects program. process ingredients mass‐rearing is more...
The European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), is a widely distributed and serious economic pest to production in the U.S. Genetic variability of O. was studied 18 sub-populations upper Midwestern United States using amplified fragment length polymorphism. relatively low GST values indicate that more variation exists within populations than between populations. High gene flow (Nm) were indicated across entire population; lowest degree northern samples (Nm =...
The structure of 72Kr has been investigated at GASP through the 40Ca(40Ca,2α) reaction a beam energy 160 MeV using 4π ISIS Si-ball for channel selection. level scheme extended up to an excitation ≈ 8.5 MeV. spins and parties observed levels are assigned tentatively. band shows predicted change from oblate prolate shape. four quasi-particle g92 alignment is found be significantly delayed in rotational frequency with respect heavier Kr isotopes. Such delay contradicts predictions standard...
The E1 response of the semi-magic nucleus 140Ce below particle threshold was measured in a (γ,γ′) experiment utilizing new Euroball Cluster detector at S-DALINAC. While energy averaged data are good agreement with tagged photon results, here they resolved for first time into 54 individual transitions. A quasiparticle-phonon model calculation including up to three-phonon configurations compares well extracted strength distribution. interference between one- and two-phonon contributions is...
A nuclear resonance fluorescence experiment with one of the newly developed highly efficient EUROBALL cluster detectors has been performed on $\ensuremath{\gamma}$-soft nucleus ${}^{196}\mathrm{Pt}$. Magnetic dipole excitations were observed between 2 and 3.5 MeV excitation energy. They are interpreted as main fragments scissors mode based measured strengths branching ratios. strong $\ensuremath{\gamma}$ decay, which we believe to be an $E2$ decay ${2}_{1}^{+}$ state, is observed. It allows...
Eradicating screwworm, Cochliomyia hominivorax (Coquerel), from continental North American via the sterile insect technique has provided huge economic benefit to livestock producers by eliminating screwworm myiasis. After confirmatory identification of fly samples infested deer USDA National Veterinary Services Laboratory on September 30, 2016, an alert was issued that myiasis discovered in Florida Keys. Personnel Animal and Plant Health Inspection Service, Agricultural Research State...
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Abstract The New World Screwworm fly, Cochliomyia hominivorax , is a major pest of livestock in South America and Caribbean. However, few genomic resources have been available for this species. A genome 534 Mb was assembled from long read PacBio DNA sequencing highly inbred strain. Analysis molecular evolution identified 40 genes that are likely under positive selection. Developmental RNA-seq analysis specific associated with each stage. We identify analyze the expression important...
Abstract European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), displays a larval diapause in response to short photoperiods and is adapted variety of local conditions throughout North America. Hence, the effective photoperiod inducing will differ among geographic ecotypes. This study considers inheritance photoperiodic induction by hybridization backcrossing two latitudinally distinct ecotypes borer collected between 41° N, 96° W 48° under range representative their...
The electromagnetic dipole response of ${}^{138}\mathrm{Ba}$ was measured up to 6.7 MeV excitation energy in a photon scattering experiment. Two Euroball Cluster detectors were used detect the scattered photons under 94 and 132 degrees. at degrees served as Compton polarimeter. total observed cross section is good agreement with previous tagged data, but present experiment transition strength electric character most transitions has been determined on state-by-state basis. data show...
Excited states of the nuclei 122,126,130Te were populated via (γ, γ′) reaction at endpoint energies bremsstrahlung between 4.5 and 5.5 MeV. Gamma rays detected with a EUROBALL CLUSTER detector single HPGe detector. In all investigated two or three prominent dipole transitions identified Eγ ≈ 3 The corresponding low-lying J = 1 are interpreted as two-phonon excitations. Quasiparticle-phonon-model calculations predict about MeV one 1− state arising from coupling first quadrupole octupole...
High-spin states in 70,72Se have been extended up to spin 14+ and 28+, respectively. The yrast bands both nuclei exhibit a very regular rotational pattern the highest spins observed, with no indication of band crossings above hw approximately=0.5 MeV. According deformed shell modeling calculations structures can be associated aligned configurations involving g9/2 quasiparticles.
Bovine blood inoculated with bacteria isolated from screwworm [Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae)]-infested animal wounds was tested as an attractant for oviposition gravid screwworms. Eight species of gram-negative coliform (Enterobacteriaceae) mixed bovine singly or all combined and incubated various times produced volatiles that attracted flies in a cage bioassay varying numbers. In 15-min duration tests, five (Klebsiella oxytoca, Proteus mirabilis, vulgaris,...
Bovine blood inoculated with bacteria isolated from screwworm [Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae)]-infested animal wounds was tested as an attractant for oviposition gravid screwworms. Eight species of gram-negative coliform (Enterobacteriaceae) mixed bovine singly or all combined and incubated various times produced volatiles that attracted flies in a cage bioassay varying numbers. In 15-min duration tests, five (Klebsiella oxytoca, Proteus mirabilis, vulgaris,...
Fall armyworm larvae (FAW), Spodoptera frugiperda (J. E. Smith) were collected from whorl-stage corn, Zea mays (L.), between the V2 and V4 stages, in 22 localities of Central, Chiapas, México, called "La Frailesca" during late Jun 2009 to determine occurrence native entomopathogens parasitic nematodes, most parasitized instars. A total 1,247 examined search biological control agents. Overall larval mortality was 16.36%. The percent due nematodes 12.99%. Hexamermis sp., probably albicans...
Rotational bands with strong magnetic dipole transitions have been observed in the doubly odd nuclei ${}^{82}\mathrm{Rb}$ and ${}^{84}\mathrm{Rb}$. These show characteristic features of rotation. They are first evidence this new kind nuclear excitation $A\ensuremath{\approx}80$ region. The results well reproduced within framework tilted axis cranking model on basis four-quasiparticle configurations type...
Journal Article Developmental Sites and Relative Abundance of Immature Stages the Stable Fly (Diptera: Muscidae) in Beef Cattle Feedlot Pens Eastern Nebraska Get access Steven R. Skoda, Skoda Search for other works by this author on: Oxford Academic PubMed Google Scholar Gustave D. Thomas, Thomas John B. Campbell Economic Entomology, Volume 84, Issue 1, 1 February 1991, Pages 191–197, https://doi.org/10.1093/jee/84.1.191 Published: 01 1991 history Received: 23 April 1990 Accepted: 06 October
Abstract Background The New World Screwworm fly (NWS), Cochliomyia hominivorax , is an ectoparasite of warm-blooded animals and a major pest livestock in parts South America the Caribbean where it remains endemic. In North Central was eradicated using Sterile Insect Technique (SIT). A control program managed cooperatively between governments United States Panama to prevent northward spread NWS from infested countries America. This accomplished by maintaining permanent barrier through release...