Life Sciences Commons^™

Factors Affecting Insecticide-Induced Resurgence Of The Brown Planthopper, Nilaparvata Lugens On Rice, S. Chelliah, E. A. Heinrichs

Department of Entomology: Faculty Publications

Resurgence of the brown planthopper, Nilaparvata lugens (Stål) on rice was induced by applications of decamethrin, methyl parathion, and diazinon. Differential mortality of predators and hoppers did not appear to be the primary factor for resurgence. Hoppers appeared to be attracted to methyl parathion and decamethrin treated plants because of plant growth. Improved plant growth, however, did not compensate for the increased feeding of the insecticide-treated hopper population, and plants treated with resurgence-causing insecticides succumbed to feeding injury earlier than untreated plants. Population increases were due in part to stimulation of reproduction of the hopper, either by contact action of …

A Technique For Physiologically Age-Grading Female Stable Flies, Stomoxys Calcitrans (L.), P. J. Scholl

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

A method of dissection followed by staining was initiated to allow physiological age- grading based on ovarian development in order to more completely describe the physiological development of adult female stable flies [Stomoxys calcitrans (L. )]. The gonotrophic developmental continuum from a non-differentiated cell in teneral females to mature eggs at the time of oviposition was first arbitrarily divided into six stages by using distinct landmarks within the developing oocyte . Then, nulliparous, uniparous, and biparous+ females were differentiated on the basis of the presence or absence of stained follicular relics in the ovariole sheaths. The combination of the …

Tb100: The Aquatic Insects Of The Narraguagus River, Hancock And Washington Counties, Maine, Terry M. Mingo, K. Elizabeth Gibbs

Technical Bulletins

This technical bulletin presents an inventory of the aquatic insects of the Narraguagus River in Hancock and Washington counties, Maine. The list is arranged phylogenetically by order and alphabetically within each order

Alfalfa Insect Management Studies 1971-77, G. R. Manglitz, W. R. Kehr, D. L. Keith, J. M. Mueke, J. B. Campbell, R. L. Ogden, T. P. Miller

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

Three tests in southwestern Nebraska during 1971 and 1972 evaluated insecticides against the army cutworm. Adult alfalfa weevils did not damage new second growth alfalfa in a small plot study during a 3-year period (1973-1975) at Gothenburg, NE. However, excellent control of larval alfalfa weevils was obtained. These results indicated a need to establish economic threshold levels for the alfalfa weevil in Nebraska to prevent unnecessary use of insecticides. Four tests to control the alfalfa weevil with registered insecticides verified the efficacy of these materials under Nebraska conditions. A series of tests conducted during 1975 at the Mead Field Laboratory …

Invertebrate Lebensspuren Of Holocene Floodplains: Their Morphology, Origin And Paleoecological Significance, Brett C. Ratcliffe, J. A. Fagerstrom

University of Nebraska State Museum: Entomology Papers

Although rocks of floodplain origin are volumetrically important, they contain relatively few trace fossils; both abundance and diversity are low. Conversely, Holocene floodplain sediments locally contain abundant and diverse lebensspuren mostly produced by insects, spiders, nematodes, annelids and molluscs. At least 8 insect orders and 31 families include species that burrow in floodplain sediments and yet none of their lebensspuren are unique to this environment. Taxonomically dissimilar insects produce morphologically similar lebensspuren, and the same species, or individual, may produce very dissimilar lebensspuren. Thus, identification of tracemakers for rocks of floodplain origin is as difficult as for marine rocks. Trace …

Supplementary Studis On The Systematics Of The Genus Perdita (Hymenoptera, Andrenidae) Part Ii, Philip H. Timberlake

Th

No abstract provided.

Supplementary Studies On The Systematics Of The Genus Perdita (Hymenoptera, Andrenidae) Part Ll, P. H. Timberlake

All PIRU Publications

This is the second part of a study (1971) that is supplementary to my revision of the genus Perdita (1954, 1956, 1958, 1960, 1962, 1964, 1968). Herein are treated some 57 species, of which 44 are described as new and the synonymy of three species is given. New keys are provided for the subgenera Macroteropsis, Epimacrotera, Cockerellula, and the Octomaculata Group and Sphaeralceae Group of the subgenus Perdita. The key to Macroteropsis is new for the females of that group, that for Epimacrotera is a revision of the key in Part III (1958). The key to Cockerellula is …

Notes On The Biology Of Halictus (Halictus) Farinosus Smith (Hymenoptera: Halictidae), William P. Nye

All PIRU Publications

Describes the habitat, life history, foraging, social behavior, and nest architecture of the subsocial halictine bee Hal ictus (Hal ictus) farinosus Smith. The interplay of host-plant conditions with nest development and generations is discussed. Natural enemies and other associates are noted but not extensively treated.

Distribution And Ecology Of Cavernicolous Coleoptera In Bat Cave, Carter County, Kentucky, David Bruce Conn

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by David Bruce Conn on April 28, 1980.

A Matter Of Taste Or The Natural History Of Carrion Beetles, Brett C. Ratcliffe

University of Nebraska State Museum: Entomology Papers

Beetles that eat writhing maggots and the decaying flesh and putrefaction of dead animals . . . what could be more macabre, repulsive, and in poor taste? [Well, possibly beetles that eat feces and have a rolling good time doing it (see my January Museum Notes).] Carrion beetles are an important part of a vast host of scavengers that are responsible for breaking down and recycling back into the ecosystem the basic elements locked inside each one of us. If it were not for these industrious scavenger beetles, we might all be surrounded by the partially decayed and mummified remains …

Blueberry Progress Reports, Amr A. Ismail, David E. Yarborough, Delmont C. Emerson, Eric Hanson, John M. Smagula, Edward Mclaughlin, John Frett, G R. Benoit, W J. Grant, F L. Caruso, M G. Zuck, Steven B. Johnson, Simeon S. Leach, Howard Y. Forsythe Jr

Wild Blueberry Research Reports

The 1979 edition of the Blueberry Progress Reports was prepared for the Maine Blueberry Commission and the University of Maine Blueberry Advisory Committee by researchers with the Maine Life Sciences and Agriculture Experiment Station and Maine Cooperative Extension Service at the University of Maine, Orono. Projects in this report include:

1. Cooperative Extension Activities

2. Plan of Work - FY 1980

3. Weed Control in Lowbush Blueberry Fields

4. Pruning of Blueberries

5. Integrated Management of Blueberry Fields

6. Physiology and Culture of the Lowbush Blueberry

7. Effect of Plant-Water Stress on "Lowbush" Blueberry Growth, Yield and Quality

8. Blueberry …

Take A Beetle To Lunch Today Or The Natural History Of Dung Beetles, Brett C. Ratcliffe

University of Nebraska State Museum: Entomology Papers

The appellation "dung beetles" refers to those scarab beetles that are usually found with animal feces either feeding on or depositing eggs in it. While this at first may seem like an incredibly unsavory topic, the fact remains that numerous creatures exist that feed on the waste products of other animals. And, as it turns out, it's a good thing they do.

The Scarabaeidae, or scarabs, is one of the larger families of beetles; it has 30,000 plus species worldwide and approximately 15,000 species in North America. (See my Museum Notes of March 1970.) The family is divided into subfamilies …

Observations Of Intercastes In Solenopsis Invicta Buren, B. Michael Glancey, R. K. Vander Meer, A. Glover, C. S. Lofgren

Entomology Papers from Other Sources

The red imported fire ant, Solenopsis invicta Buren, exhibits classical polymorphism, which is defined as the coexistence of 2 or more functionally different castes of the same sex (Wilson 1971). The 2 basic castes are the worker and the female sexuals.

New Species Of Coprini (Coleoptera: Scarabaeidae: Scarabaeinae) Taken From The Pelage Of Three Toed Sloths (Bradypus Tridactylus L.) (Edentata: Bradypodidae) In Central Amazonia With A Brief Commentary On Scarab-Sloth Relationships, Brett C. Ratcliffe

University of Nebraska State Museum: Entomology Papers

Two of three species of Scarabaeidae associated with the three toed sloth in the vicinity of Manaus, Amazonas, Brazil are described as new: Trichillum adisi and Uroxys besti. The pupa and third stage larva of T. adisi are described. Ecological aspects of the sloth-scarab associations are discussed.

Strategus Syphax (Fabr.):A Description Of The Third Instar Larva And Pupa (Coleoptera: Scarabaeidae : Dynastinae), Brett C. Ratcliffe, Fortune Chalumeau

University of Nebraska State Museum: Entomology Papers

The third instar larva and pupa of Strategus syphax (Fabr.) are described, and a key is presented for the known larvae of the genus Strategus.

Honeydew Excretion Measurement Techniques For Determining Differential Feeding Activity Of Biotypes Of Nilaparvata Lugens On Rice Varieties, P. Paguia, M. D. Pathak, E. A. Heinrichs

Department of Entomology: Faculty Publications

Techniques to quantify the feeding activity of Nilaparvata lugens (Stål) on rice varieties as based on honeydew excretion are described, and their potential as a bioassay for biotype identification are discussed. Honeydew, excreted on filter paper, was stained with ninhydrin and quantified by measuring the area (mm²) or by weighing. Results were satisfactory but the methods were extremely tedious. Volumetric measurement of honeydew with micropipettes was less sensitive. The color intensity of one μliter honeydew streaked on filter paper and treated with 0.001% ninhydrin was determined with a Fujiox Densitometer. The method was relatively simple and rapid …

A Survey Of The Alfalfa Seed Chalcid In Central Kansas, Gary Brewer

Department of Entomology: Faculty Publications

Twenty-three central Kansas counties were surveyed for the alfalfa seed chalcid, Bruchophagus roddi Guss. (Hymenoptera: Eurytomidae) and its parasites from August 28 to September 6, 1979. The seed chalcid or evidence of its presence was found in all counties surveyed. Two hymenopterans, Tetrastichus bruchophagi Gahn (Eulophidae) and Liodontomerus perplexus Gahn (Torymidae), were the major parasites found; T. bruchophagi was about twice as common as L. perplex us. Other unidentified hymenopteran and dipteran parasites were occasionally found. In four counties, the seed chalcid was found free of parasites while in five other counties, only one parasite species was found with …

Identification Of Mosquitoes Of Anopheles Gambiae Species Complex A And B By Analysis Of Cuticular Components, D. A. Carlson, M. W. Service

Entomology Papers from Other Sources

Two important vectors of malaria in Africa, Anopheles gambiae and Anopheles arabiensis (Diptera: Culicidae), often occur sympatrically and cannot be distinguished morphologically. A chemical method was developed to identify individual laboratory-reared adult males or females of either species by extraction and analysis of cuticular components with gas chromatography. Statistically significant differences were seen between species when selected pairs of peaks were compared.

Southern Pine Beetle Handbook: Woodpeckers And The Southern Pine Beetle, James Kroll, Richard N. Conner, Robert R. Fleet

eBooks

In 1974 the U.S. Department of Agriculture initiated the Combined Forest Pest Research and Development Program, an interagency effort that concentrated on the Douglas-fur tussock moth in the West, on the southern pine beetle in the South, and on the gypsy moth in the Northeast. The work reported in this publication was funded in part by the Program. This handbook is one in a series on the southern pine beetle.

New Species Of North American Bees Of The Genus Dufourea (Hymenoptera, Halictidae) With Descriptions Of Two Previously Undescribed Females, George E. Bohart

All PIRU Publications

Thirteen new species of halictid bees in the genus Dufourea are described. Also described are females of two species known previously only from males. All are from the Western United States and northern Mexico.

Spider Community Organization : Seasonal Variation And The Role Of Vegetation Architecture, Cynthia L. Hatley, James A. Macmahon

Green Canyon Environmental Research Area, Logan Utah

The relationship between vegetation architecture and spider community attributes were examined in a big sage community. Spiders were separated into guilds using similarities of species' hunting behavior. Shrub architecture was experimentally manipulated in the field by either clippings 50% of the shrub's foliage to decrease foliage density or tying together a shrub's branches to increase foliage density. Shrub perturbations resulted in changes in the number of spider species, spider guilds and guild importance values. The number on spider species and guilds in the tied shrubs were significantly higher than those in the clipped or control shrubs sampled. Spider species diversity …

Linkage Studies In Tribolium Confusum Duval (Coleoptera, Tenebrionidae), Halluma Mohamed Edongali

Theses Digitization Project

No abstract provided.

Beekeeping Regions In The United States, William P. Nye

All PIRU Publications

No abstract provided.

Arapaho Prairie, Arthur County, Nebraska: Approximate Ap Grid For Gis, Kathleen H. Keeler, A. T. Harrison, L. S. Vescio

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Grid map of field sites at Arapaho Prairie in Arthur County, Nebraska. Scale 1 5/16" = 1/4 mile. Shows permanently marked vegetation quadrats, blowouts and ravine washouts, roads, and 100' contour intervals. Part of the map was destroyed by mice. What remains of the map as of 2013 is shown.

The Clcindelidae Of Illinois, Ron Garner

Insect Population Studies

Publication year of this paper is actually unknown.

Twenty-one species of Cicindelidae occur in Illinois.

Among these are two species of Tetrecha ( carolina and virginica),

and nineteen species of Cicindela ( formosa, purpurea, limbalis,

splendida, duodecimguttata, renanda, hirticollis, tranauebarica,

scutellaris, sexguttata, patruela, J;illnctt1lata, rufiventris,

celeripes, curisitans, punctulata, cuprascens, macra and lepida).

The species named are identified by use of a key. Illinois

distributional records are listed for each species.