Life Sciences Commons^™

Management Of Four Alfalfa Varieties To Control Damage From Potato Leafhoppers, W. R. Kehr, R. L. Ogden, J. D. Kindler

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The main purpose of this study was to obtain information on forage yield and quality of four alfalfa (Medicago sativa L.) varieties that differed in level of resistance to potato leafhopper (Empoasca fabae Harris) yellowing, when cut at three stages of growth in the second and third cuttings in field plots, with and without insecticide application. The stages of growth were bud, 1/10, and full bloom. Other purposes included study of the same varieties in field cages manually infested at 20, 40, and 60 adult leafhoppers/square yard, and in supplemental cuttings of field plots under high natural infestation …

Bionomics Of Insects Associated With Corn In The Nebraska Sandhills, J. L. Wedberg, J. B. Campbell, T. J. Helms

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

Investigations were conducted in the Nebraska Sandhills to determine the impact of transition from grassland to irrigated corn on selected insect species, to identify indigenous species that may be economically important to corn production, and to provide a point of reference for future development of pest management programs for irrigated corn.

Tb76: Production Of Entomophthora Resting Spores For Biological Control Of Aphids, R. S. Soper, F. R. Holbrook, I. Majachrowicz, C. C. Gordon

Technical Bulletins

This publication describes a technique for producing Entomophthora resting spores for biological control of aphids. The report includes information on media preparation and inoculation and extraction and purification of the resting spores.

Effects Of A Wide-Area Application Of Ulv Malathion On Leafhoppers In Alfalfa, Steven D. Koinzan, K. P. Pruess

Department of Entomology: Faculty Publications

Beginning in 1968, a 16 (4×4) mi² area of Dawson County, Nebraska, was sprayed in August for 3 consecutive years with ULV malathion. Leafhoppers in alfalfa were monitored as nontarget organisms. Scaphytopius acutus (Say) was suppressed from one growing season into the next. All other major species, Aceratogallia uhleri (Van Duzee), Balclutha neglecta (DeLong and Davidson). Empoasca fabae (Harris) and Macrosteles fascifrons (Stål) recovered within 2–4 wk following treatment.

Eatonia No. 20, May 05, 1975, William L. Peters, Janice Peters

Eatonia

Eatonia was a newsletter established to facilitate communication among scientists working on a group of aquatic insects in the order Ephemeroptera, more commonly known as mayflies. The newsletter is named after Rev. Alfred E. Eaton who studied mayflies in England in the late 1800’s and is considered the “father” of the modern classification of mayflies.

Cenozoic Mammals From The Central Great Plains, C. Bertrand Schultz, Larry D. Martin, R. George Corner, Lloyd G. Tanner

Bulletin of the University of Nebraska State Museum

Includes:

Part 1. Middle and Late Cenozoic Tapirs from Nebraska. By C. Bertrand Schultz, Larry D. Martin, and R. George Corner.

Part 2. Stratigraphic Occurrences of Teleoceras, with a New Kimballian Species from Nebraska. By Lloyd G. Tanner.

Part 3. A New Kimballian Peccary from Nebraska. By C. Bertrand Schultz and Larry D. Martin.

Part 4. Bears (Ursidae) from the Late Cenozoic of Nebraska. By C. Bertrand Schultz and Larry D. Martin.

Part 5. Scimitar-toothed Cats, Machairodus and Nimravides, from the Pliocene of Kansas and Nebraska. By Larry D. Martin and C. Bertrand Schultz.

84 pp

A New Kimballian Peccary From Nebraska, C. Bertrand Schultz, Larry D. Martin

Bulletin of the University of Nebraska State Museum

A new species of Pliocene peccary, Prosthennops (Macrogens) graffhami; is described from the Kimball Formation, Ogallala Group, Frontier County, Nebraska. This new species is the latest in geologic age and most advanced in the genus.

The remains of fossil vertebrates are generally rare in the upper part of the Ogallala group, and some have maintained that Hemphillian faunas such as Coffee Ranch and Smith County, Kansas, represent the latest Ogallala faunas. Later faunas than are typically considered as Hemphillian, containing more advanced forms, occur in the Kimball Formation and deposits of equivalent age. Known faunas which may …

Bears (Ursidae) From The Late Cenozoic Of Nebraska, C. Bertrand Schultz, Larry D. Martin

Bulletin of the University of Nebraska State Museum

A ramus and partial premaxilla establish the presence of a new subspecies of Indarctos in the upper Pliocene (Kimball Formation, Ogallala Group) of Frontier County, Nebraska. An extremely large species of Agriotherium is represented by fragmentary remains from the middle Pliocene (middle part of Ash Hollow Formation, Ogallala Group) of Sherman County, Nebraska.

This study is part of a series of papers dealing primarily with the fauna of the Kimball formation in Nebraska (Barbour 1927, 1929; Barbour and Schultz, 1941; Schultz and Stout, 1948, 1961; Kent 1963, 1967; Tanner, 1967; Short, 1969; Martin and Tate, 1970; Schultz, Schultz, and Martin, …

Scimitar-Toothed Cats, Machairodus And Nimravides, From The Pliocene Of Kansas And Nebraska, Larry D. Martin, C. Bertrand Schultz

Bulletin of the University of Nebraska State Museum

"Machairodus catocopis Cope" is shown to be a pseudaelurin cat belonging to the genus Nimravides Kitts. Nimravides thinobates (Macdonald) is a possible synonym of N. catocopis (Cope). Nimravides is compared with the Eurasian Machairodus-like cat, Dinofelis. Machairodus (Heterofelis) coloradensis is reported from the Kimball Formation, upper Pliocene (Kimballian) of Cheyenne County, Nebraska, and from the upper part of the Ash Hollow Formation, Pliocene (Hemphillian) of Sherman County, Nebraska. The Kimballian form is described as a new subspecies, Machairodus coloradensis tanneri.

The genus Machairodus has long been associated with the Hemphillian of North America and the …

Eatonia Sup. 01, Jan. 05, 1975, William L. Peters, Janice Peters

Eatonia

Eatonia was a newsletter established to facilitate communication among scientists working on a group of aquatic insects in the order Ephemeroptera, more commonly known as mayflies. The newsletter is named after Rev. Alfred E. Eaton who studied mayflies in England in the late 1800’s and is considered the “father” of the modern classification of mayflies.

Efeito De Dosagens E Épocas De Applicações De Inseticida No Rendimento Da Soja, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

Foi conduzido um experimento na Estação Experimental Agronômica da UFRGS, Guaíba, RS, com a finaIidade de determinar o efeito de dosagens e épocas de aplicação de inseticida no desfolhamento por Jagartas, na percentagem de sementes com danos por percevejos e no rendimento. Endrin 20 % CE foi aplicado em duas dosagens e em três datas. A dosagem apenas teve um efeito na percentagem de sementes danificadas por percevejos. A data de aplicação teve um efeito no desfolhamento por lagartas. Uma aplicação na época do começo do aumento acentuado da população de Anticarsia gemmatalis Hübner, 1818, deu maior proteção contra o …

Estudo De Niveis De Populaçao De Anticarsia Gemmatalis Hübner, 1818 E Plusia Sp. Em Soja No Rio Grande Do Sul, Elvis Arden Heinrichs, R. F.P. Da Silva

Department of Entomology: Faculty Publications

Estudos dos níveis de populaçãio de Anticarsia gemmatalis e Plosia sp. em soja no RS, indicaram que essas espécies alcançaram maior incidéncia na segunda quinzena de janeiro.

A proporção entre A. gemmatalis e Plosia sp. foi de aproximadamente 10:1. A população de A. gemmatalis e percentagem de desfolhamento aumentou rapidamente dé 18 a 26 de janeiro.

Este estudo indicou que o desaparecimento repentino ·de A. gemmatalis nos meses de fevereiro e março foi, na maior parte, devido ao ataque do fungo Nomuraea rileyi (Farlow) Samson ( = Spicaria rileyi).

Agron. Sulriograndense, Porto Alegre, 11(1):29-35, 1975.

A Revision Of The Nearctic Species Of The Genus Phronia (Diptera: Mycetophilidae), Raymond Gagne

USDA Systematic Entomology Laboratory

Phronia contains 86 species of small, brown or black mycetophilids. Adults of these fungus gnats are most often caught flying above the forest floor, especially along damp ravines. The fungivorous larvae have been found grazing on slime molds growing on the surface of decaying logs. Most species occur in the Holarctic region, but 1 described and several undescribed species are known from the Ethiopian region. In North America, there are 49 species, 33 of which are known also from Europe.

Biological Control Of Insects On The Ord. 1. Production Of Sitotroga Cerealella For Mass Rearing Of Trichogramma Wasps, M Grimm, P. J. T. Lawrence

Journal of the Department of Agriculture, Western Australia, Series 4

Department of Agriculture entomologists have developed a technique for the production and collection of eggs of the Angoumois grain moth (Sitotroga cerealella) for mass-rearing the parasitic waspTrichogramma pretiosum Riley.

Trichogramma is giving promising results in trials aimed at developing biological control of insect pests in the Ord River Irrigation Area.

Airborne Cues As A Factor In Frequency-Dependent Mate Selection In Mormoniella Vitripennis, Harry Coleman White

Dissertations, Theses, and Masters Projects

No abstract provided.

Arkansas Butterflies And Skippers, Leo J. Paulissen

Journal of the Arkansas Academy of Science

Since 1955 the writer has been compiling information on Arkansas butterflies and skippers. A list of species is presented from data obtained from personal collecting, extensive contacts with contemporary collectors, and a concerted literature search. A total of 151 species are listed on a chart which also shows from which of five designated areas in the state each species has been reported.

Somatic Pairing In Drosophila Virilis Mitosis, William C. Guest

Journal of the Arkansas Academy of Science

In neuroblast cells homologous chromosomes tend to pair during prophase of mitosis. Heterochromatic elements of homologous chromosomes are widely separated in very early prophase, at which time the euchromatin is poorly stained. Pairing is intimate for euchromatic portions of chromosomes in early and middle prophase with chiasmata frequently present. Homologous chromosomes most commonly lie side-by-side in late prophase and metaphase. Statistical data are presented to show the frequency of intimate pairing in prophase and side by side pairing in metaphase.

Middle And Late Cenozoic Tapirs From Nebraska, C. Bertrand Schultz, Larry D. Martin, R. George Corner

Bulletin of the University of Nebraska State Museum

The distribution and evolution of Late Cenozoic tapirs are discussed and the forms present in Nebraska are reported. Two new species are described from the Ogallala Pliocene of Nebraska, ?Tapirus johnsoni and ?T. simpsoni. Tapirs are known in Nebraska from the Early Oligocene through the Middle Pleistocene. The northern limit of the distribution of the tapirs contracts gradually southward in North America throughout the Tertiary, and even during the Pleistocene interglacials Nebraska must have been near the northern limit of their range.

Stratigraphic Occurrences Of Teleoceras With A New Kimballianspecies From Nebraska, Lloyd G. Tanner

Bulletin of the University of Nebraska State Museum

Study of Teleoceras remains in the University of Nebraska State Museum indicates that this specialized, short-limbed rhinoceros inhabited the Central Great Plains from Early through Late Pliocene. Previously thought to have become extinct at the end of the middle Pliocene, this genus is now known from the very latest Pliocene. A new species, Teleoceras schultzi, is described from the Kimball Formation, Ogallala Group, Frontier County, Nebraska.

Effect Of Ronnel On The Honey Bee, William P. Nye

All PIRU Publications

LD₅₀ for worker honey bees of unknown ages exposed to topical applications was 1.5 micrograms/bee in 24 hours. LD₅₀ for similar bees fed ronnel in sugar syrup was 3.0 micrograms/bee in 24 hours. Honey bees did not visit materials treated with ronnel in laboratory tests where bees had a choice between food with and without ronnel added.

Virus Diseases In Agriculture, George Mclean

Journal of the Department of Agriculture, Western Australia, Series 4

Viruses are extremely small particles which can only be seen with an electron microscope. A virus is present in a diseased plant as huge numbers of tiny particles within the cells of the plant. Viruses which are infectious can cause disease, and reproduce only inside the cells of a living plant.

Many insects transmit plant virus diseases—aphids, leafhoppers, mealy bugs, thrips and beetles. Generally a virus is spread by only one of these groups of insects.

The Western Australian Department of Agriculture is expanding the diagnostic service for the identification of plant viruses.

A Unit For Trapping Clean Pollen, S R. Chambers

Journal of the Department of Agriculture, Western Australia, Series 4

Pollen, the fine particles formed in plant life and carrying the male germ cell responsible for fruit fertilisation and plant embryo formation, has been the subject of continual study over many years.

Original attempts to trap pollen loads from the honeybees were made with the object of feeding back pollen to colonies in times of short supply or over periods of pollen dearth.

With improved trapping methods, harvesting of pollen has developed to the extent that beekeepers can now produce a surplus to their needs.

In a time of world shortage of protein food substances it is not surprising that …

Comparison Of Laboratory Rhythms In Several Species And Genera Of Ants, Siu-Ming A. Soong

Loma Linda University Electronic Theses, Dissertations & Projects

Few simultaneous comparative studies of functional diversity have been made at the genus level. Four genera (Pogonomyrmex, Veromessor, Formica, Myrmecocystus) of ants were compared, two of them represented by two species each. Under controlled temperatures, in alternating light and dark, there was more difference in phase of rhythm among than within genera. This evidence adds to previous field evidence for a taxonomic explanation of such diversity in ants.

A Faunal Study Of Illinois Silphidae (Coleoptera), Brian Baldwin

Masters Theses

A faunal study of the family Silphidae in Illinois was made through examination of over 1400 specimens. A brief history of the taxonomy of the family and a description of silphid ecology was presented. Keys to the tribes, genera, and species of adult Silphidae occurring in Illinois were divised. Four genera and sixteen species of silphids are described, supplemented with drawings and distribution maps.