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Honey Bees (Hymenoptera: Apidae) As Vectors Of Bacillus Thuringiensis For Control Of Banded Sunflower Moth (Lepidoptera: Tortricidae), Jawahar L. Jyoti, Gary J. Brewer

Department of Entomology: Faculty Publications

A study was conducted in 1996 and 1997 to determine if honey bees, Apis mellifera L., could vector Bacillus thuringiensis Berliner variety kurstaki from hives equipped with a pathogen applicator to sunflower capitula and if the amount of B. thuringiensis deposited on the capitula would be sufficient to control the banded sunflower moth, Cochylis hospes Walsingham. The study demonstrated that honey bees became contaminated with B. thuringiensis as they exited hives equipped with filled pathogen applicators and deposited enough B. thuringiensis on the capitula to cause banded sunflower moth larval mortality. When 2 methods of applying B. thuringiensis were compared, …

Identification Of Muscidifurax Spp. By Polymerase Chain Reaction-Restriction Fragment Length Polymorphism, David B. Taylor, Allen L. Szalanski

Department of Entomology: Faculty Publications

Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis of the nuclear ribosomal ITS1 region was used to differentiate Muscidifurax (Hymenoptera: Pteromalidae) species which are parasitoids of filth fly pupae. Three restriction enzymes, Dpn 11, Mse I, and Taq I, produced restriction patterns which were diagnostic for the four species analyzed, M. raptor, M. raptorellus, M. uniraptor, and M. zaraptor. Seven other restriction enzymes were able to differentiate one or more of the species and can be used alone, or in combination with other enzymes, to verify identifications. No intraspecific variation was observed among the populations examined. The utility of the …

Median Lethal Concentration And Efficacy Of Bacillus Thuringiensis Against Banded Sunflower Moth (Lepidoptera: Tortricidae), Jawahar L. Jyoti, Gary J. Brewer

Department of Entomology: Faculty Publications

This study was conducted to determine dose-mortality response of the banded sunflower moth, Cochylis hospes Walsingham, to Bacillus thuringiensis Berliner and its effect on sunflower seed damage and yield. Of B. thuringiensis products tested, Cutlass AF and Javelin WG had the lowest LC50 values and highest slopes and relative potencies for C. hospes. Javelin WG was superior to the other B. thuringiensis materials tested and to Asana XL in preventing seed damage. Sunflower heads sprayed with Javelin WG had higher yields than sunflower heads sprayed with Asana XL or the other B. thuringiensis products tested. Asana XL is a standard …

Nightly And Seasonal Movements Of Boiga Irregularis On Guam, Mark Tobin, Robert Sugihara, Patricia Pochop, Michael Linnell

United States Department of Agriculture Wildlife Services: Staff Publications

Brown tree snakes (Boiga irregularis, BTS), inadvertently introduced to the island of Guam shortly after World War II, have had catastrophic effects on the native fauna of this U.S. territory. We used radio-telemetry to monitor daytime refugia and nightly movements of 60 BTS (30 during each of two seasonal periods) to determine the extent of nightly, weekly, and monthly movements. Eighty-three percent of subadult daytime sightings were in trees, compared to only 49% of adult daytime sightings. Most measures of movement did not vary with seasonal period, sex, or age class. BTS moved an average of 64 m …

Inhibition Of Aflatoxin Biosynthesis By Phenolic Compounds, S. S. T. Hua, K. O. Grosjean, J. L. Baker

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The phenolic compounds acetosyringone, syringaldehyde and sinapinic acid inhibited the biosynthesis of aflatoxin B₁ (AFB₁) by A. flavus. Acetosyringone was the most active among the three compounds, inhibiting aflatoxin level by 82% at 2m mol l^-1. The synthesis and accumulation of norsolorinic acid, an aflatoxin biosynthetic intermediate, was also inhibited. These results suggest that at least one step early in the AFB₁ biosynthetic pathway is inhibited by the phenolics.

Effects On Commercial Broiler Chicks Of Constant Exposure To Ultraviolet Light From Insect Traps, Jerome Hogsette, Henry Wilson

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Constant exposure of newly hatched Avian x Avian broilers to ultraviolet light from insect traps for 42 d resulted in no significant differences in mortality, weight gain, feed consumption, or feed conversion. Birds were exposed to greater intensities of ultraviolet light for longer periods than could be expected under commercial conditions. Although house flies are rarely a problem in broiler houses, our results indicate that insect traps with ultraviolet light as an attractant would not be detrimental to production of broilers. The need for additional testing of light traps for nuisance fly control in commercial broiler houses is discussed.

The Reproductive Biology And Effective Pollinators Of The Endangered Beardtongue Penstemon Penlandii (Scrophulariaceae), Vincent J. Tepedino, Sedonia D. Sipes, Terry L. Griswold

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Penland's beardtongue, a rare endemic plant of the Colorado Plateau, displays a mixed breeding system. Plants are partially self-compatible but set more fruits when cross-pollinated than when self-pollinated. Fruit production is significantly increased by pollinators. However, in two years of study there was no indication that fruit set was being limited by inadequate pollinator visitation. Pollinator effectiveness was judged by correlating bee behavior at the flowers with analysis of the pollen carried on bee bodies. The most important pollinators were native megachilid bees, particularly in the genus Osmia. The bees that pollinate Penland's beardtongue are essential to its reproduction …

Report Of The Brassica Crops Working Group, Chris Neeser

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The Brassicaceae family comprises about 3000 species, the majority of which are found in the Northern Hemisphere. Many common agricultural weeds, such as Brassica nigra (L.) Koch, Brassica rapa L., Cardaria draba (L.) Desv., Raphanus raphanistrum L., and Sinapis arvensis L., belong to this family. The most important crop species from this family are the oilseed Brassicas; Brassica napus L., B rapa L., and B juncea Coss., which are generally referred to as rapeseed, oilseed rape, or canola. Other widely cultivated species in this family are: B. oleracea L. (cabbage, kale, kohlrabi, Brussels sprouts, cauliflower, and broccoli), B. chinensis L. …

Report Of The Grains Working Group (Rice, Sorghum And Wheat), Donna Mitten

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The grains working group identified three crops which have sexually compatible weedy relatives likely to be subject to gene flow in US agricultural systems (Table 1). The ease of cross pollination and the successful production of a fertile hybrid vary with each case. If the selective advantage of an introduced trait is positive, however, introgression of the new trait into an existing weed population is possible. The risk of ecological harm is then dependent upon the habitat of the weed. In the crop-weed complexes considered here, in which the habitat of the weedy relative is limited to agricultural systems, the …

Nebraska Summary 304: Massey Ferguson 6280 Diesel 32-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of …

Nebraska Summary 318: Massey Ferguson 8220 Diesel 18-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of …

Nebraska Summary 319: Massey Ferguson 8240 Diesel 18-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of …

Nebraska Summary: S281 New Holland 8184, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S294 New Holland Ts90, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S325 Case-Ih C60, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S296 New Holland Ts 110, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S330 New Holland Tn55, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S348 New Holland Tl80, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S503 Kubota M120dt, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Transactions Of The Nebraska Academy Of Sciences Table Of Contents: Volume 25 (1999)

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Editorial Contents

Nebraska Academy of Sciences Officers, Policy Committee ................. ii

Editorial Board ................. iv

Membership Objectives and Friends of the Academy ................. v

Nebraska Association of Teachers of Science ................. vi

Preparation of manuscripts ................. inside back cover

Papers

Using omissive faults to obtain local convergence in partially connected networks (M. H. Azadmanesh and A. W. Krings) ................. 1

New floristic records for Nebraska-5 (Steven B. Rolfsmeier, Robert F. Steinauer, and David M. Sutherland) ................. 15

A key to dicotyledonous rosettes of eastern Nebraska (Phillip D. Moore) ................. 23

The brine shrimp Artemia franciscana in closed microalgal-based microcosms (biospheres) …

The Brine Shrimp Artemia Franciscana In Closed Microalgal-Based Microcosms (Biospheres), Rachel L. Yung, Mark A. Gouthro, James R. Rosowski

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

The purpose of this study was to examine the effects of three experimental variables on the stability and fecundity of a brine-shrimp community in a closed, micro algal-based microcosm. Xenic microalgal cultures and brine shrimp (Artemia franciscana Kellogg) in 300-cc acrylic spheres (referred to as biospheres or microcosms) were subjected to three experimental variables: (1) the culture volume (150 ml or 250 ml), (2) presence or absence of daily culture mixing (sphere rotation), and (3) a microcosm atmosphere that was either closed or open to the surrounding atmosphere. Each sphere started with 200 brine shrimp cysts and the microalga …

The Pleasing Fungus Beetles (Coleoptera: Erotylidae) Of Nebraska, Michael A. Goodrich, Charles A. Springer

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

The known Nebraska fauna of the family Erotylidae is composed of 13 species included within five genera. The species are: Dacne quadrimaculata (Say), Megalodacne fasciata (Fabricius), Ischyrus q. quadripunctatus (Olivier), Triplax californica antica LeConte, Triplax flavicollis Lacordaire, Triplax frontalis Horn, Triplax frosti Casey, Triplax thoracica Say, Tritoma angulata Say, Tritoma biguttata affinis Lacordaire, Tritoma humeralis Fabricius, Tritoma pulchra Say and Tritoma sanguinipennis (Say). Six other species not yet recorded from Nebraska, but which may occur in the state, are included in the key and species descriptions.

Microhabitat Preferences Of Bullfrog Tadpoles (Rana Catesbeiana) Of Different Ages, Geoffrey R. Smith

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

I experimentally investigated the habitat use preferences of bullfrog (Rana catesbeiana) tadpoles of different ages (early, first-year vs. late, second-year, premetamorphic) in the laboratory. Early tadpoles showed a preference for non-vegetated areas, whereas late tadpoles showed no preference. Early tadpoles were seen more often over small, gravel substrate as opposed to large rocks, whereas late tadpoles showed no preference. Early tadpoles preferred medium depths, whereas later tadpoles preferred deeper water. Thus, it appears there may be habitat preferences in bullfrog tadpoles, and that these preferences may change over time.

Tertiary Bats (Mammalia: Chiroptera) From Northern Nebraska, Nicholas J. Czaplewski, Bruce E. Bailey, Richard G. Corner

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Scarce remains of bats are reported from five localities in northern Nebraska in which other kinds of vertebrates are much more common. ?Oligomyotis or ?Myotis, possibly of an undescribed species, is represented by fragments of jaws and humeri from an early Arikareean (late Oligocene) locality in Dawes County. Several toothless jaw fragments from the late Hemingfordian (middle Miocene) Companion Quarry in Sioux County represent an indeterminate microchiropteran. An indeterminate species of Myotis was encountered in the middle Clarendonian (late Miocene) Ashfall site in Antelope County. A hairy-tailed bat, Lasiurus sp. indet., occurred in late Clarendonian (late Miocene) …

New Floristic Records For Nebraska-5, Steven B. Rolfsmeier, Robert F. Steinauer, David M. Sutherland

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Recent field and herbarium studies have revealed the presence of 57 species, two varieties, and three hybrids of vascular plants and one moss not previously published with verification from Nebraska. Twenty-eight taxonomic entities are considered likely native in Nebraska, including: xAchnella caduca, Arabis divaricarpa, Aster ascendens, Atriplex suckleyi, Callitriche heterophylla, Campylium stellatum, Carex hirtifolia, Carex lasiocarpa var. americana, Chenopodium cycloides, C. pallescens, Dioscorea quaternata, Draba brachycarpa, Eleocharis wolfii, Elatine brachysperma, Elodea bifoliata, xElyhordeum iowense, xElyhordeum montanense, Eragrostis secundiflorus ssp. oxylepis, Erigeron lonchophyllus, Houstonia pusilla, Maianthemum canadense, Mirabilis exaltata, Myosotis verna, Pedicularis crenulata, Plantago rhodosperma, Potentilla simplex, Scutellaria parvula var. parvula …

Distribution And Inhibition Of Esterases In Various Body Tissues Of Susceptible And Resistant German Cockroaches (Dictyoptera: Blattellidae), No-Joong Park, Shripat T. Kamble

Department of Entomology: Faculty Publications

The distribution and inhibition of esterase activity among body of the resistant Crawford and susceptible CSMA strains of male German cockroach, Blattella germanica (L.), were evaluated with α- and β-naphthyl esters using a spectrophotometric assay and native polyacrylamide gel electrophoresis. The esterase activities in the Crawford strain were significantly higher than in the CSMA strain in most tissues except midgut and male genitalia, where the activities were similar. In both strains, isozyme a was dominant in the brain and fat body and isozymes c and d were more abundant in the midgut; but in addition to isozyme a, isozyme …

Virulence Of Metarhizium Anisopliae (Deuteromycotina: Hyphomycetes) Strain Esc-1 To The German Cockroach (Dictyoptera: Blattellidae) And Its Compatibility With Insecticides, Pari Pachamuthu, Shripat T. Kamble, Gary Y. Yuen

Department of Entomology: Faculty Publications

Virulence of Metarhizium anisopliae (Metschnikoff) Sorokin strain ESC-1 against the German cockroach, Blattella germanica (L.), was determined using 5 concentrations ranging from 83107 to 23109 spores per milliliter. The calculated LD50 value was 4.18 by 108 spores per milliliter (4.18 3 105 spores per cockroach). In vitro study was conducted to determine the compatibility of M. anisopliae strain ESC-1 with chlorpyrifos, propetamphos, and cyfluthrin. Insecticides did not affect conidial germination but did adversely affect the growth and sporulation of M. anisopliae strain ESC-1. The growth of M. anisopliae colonies on media amended only with 50 and 500 ppm of chlorpyrifos …

Aulacaspis Yasumatsui (Hemiptera: Sternorrhyncha: Diaspididae), A Scale Insect Pest Of Cycads Recently Introduced Into Florida, Forrest W. Howard, Avas Hamon, Michael Mclaughlin, Thomas J. Weissling, Si-Lin Yang

Department of Entomology: Faculty Publications

Observations were conducted in southern Florida on Aulacaspis yasumatsui Takagi (Hemiptera: Sternorrhyncha: Diaspididae), a recently introduced armored scale insect native to Southeast Asia. The insect’s host plants, exclusively cycads, were identified in the following genera: Cycas (Cycadaceae ); Dioon, Encephalartos, Microcycas, (Zamiaceae), and Stangeria (Stangeriaceae). Cycas spp. seemed to be preferred over other cycad genera by this insect. Aulacaspis yasumatsui infested pinnae, rachides, strobili, stems, and roots of various species of cycads. It generally infested all above-ground plant parts of Cycas spp. and sometimes the primary and secondary roots to a soil depth of 60 cm. No morphological differences in …

Surface Features Of The Salt Basin Of Lancaster County, Nebraska, R. M. Joeckel, B. A. Clement

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Protecting Communication Departments: Reflections On The Nebraska Experience, Ronald Lee, William J. Seiler

Department of Communication Studies: Faculty Publications

Eight years ago, in the first week of the 1991 fall semester, the Acting Senior Vice Chancellor for Academic Affairs announced a series of vertical budget cuts that included the elimination of the University of Nebraska–Lincoln’s department of Speech Communication (now Communication Studies). Over the next seven months the department fought against the proposed action. In March 1992, the Budget Reduction Review Committee voted against the Vice Chancellor’s recommendation. Later in the month, the Academic Planning Committee also voted to rescind the budget cutting measure.

These actions ended the battle and assured the continuation of the department. In an earlier …