Entomology Commons^™

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.

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.

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 …

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 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.

Danos Causados À Soja Em Diferentes Níveis E Épocas De Infestação, Durante O Crescimento, Maria Helena M. Galileo, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

Foram avaliados os danos causados à soja (Glycine max (L.) Merrill) por Edessa meditabunda (Fabricius, 1794), em diferentes níveis e épocas de infestação, usando-se gaiolas de campo, no ano agrícola 1973/74. Os níveis de dois, quatro, seis e dez insetos por gaiola, atuando do florescimento pleno até iniciar-se o enchimento da semente, bem como as infestações desde o florescimento pleno até o final da maturação fisiológica da semente, não reduziram o rendimento, o número de vagens e de sementes, o número de sementes por vagens e o peso médio da semente. Igualmente, a percentagem de sementes danificadas, em diferentes …

Distribution Of Plants With Extrafloral Nectaries And Ants At Two Elevations In Jamaica, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Frequencies of plants with extrafloral nectaries were determined for two elevations in Jamaica. Extrafloral nectaries were found on 0.28 of the plants at sea level (Happy Grove, Portland) and 0.00 of the plants at 1310 m (Whitfield Hall, St. Thomas). Ant abundance, as indicated by discovery of and recruitment to baits, was greater at the lower elevation site. However, despite the apparent absence of plants with extrafloral nectaries, there were abundant ants at 1310 m.

Effect Of Cold Acclimation On Cold Tolerance Of Laboratory-Reared Diapausing Pink Bollworms, Robert J. Wright, H. M. Graham

Department of Entomology: Faculty Publications

Cold acclimation and cold tolerance were studied in laboratory-reared diapausing pink bollworms, Pectinophora gossypiella (Saunders), conditioned at 5°, 10°, and 15° C for 2,4, and 8 wk. Larval mortality, abnormal pupation and total mortality from 2-h exposure to sub-zero temperatures increased similarly as the temperature decreased from _6° to -15° C. Exposure to -9° C and above had little effect. The effect of cold conditioning on cold tolerance was most important at the _12° C exposure. Conditioning at 5°, 10°, and 15° C reduced total mortality after exposure to _12° C, compared to unconditioned larvae. Conditioning of larvae at 10° …

Residues Of Carbofuran Applied As A Systemic Insecticide In Irrigated Wetland Rice: Implications For Insect Control, J. N. Seiber, Elvis A. Heinrichs, G. B. Aquino, S. L. Valencia, P. Andrade, A. M. Argente

Department of Entomology: Faculty Publications

The behavior of carbofuran residues in rice plants treated by broadcast, soil incorporation, and root-zone application,and by seedling root-soak and root-coat technique was studied. Placement of insecticide in gelatin capsules in the root zone gave good persistence (about 60 days) and leaf residue (as much as 45 ppm at 10 days after treatment). Among the methods tested it also controlled early season pests best and gave the highest grain yields. Soil incorporation and root-zone placement with a liquid-band applicator was also more efficient than paddy-water broadcast in getting insecticide to the plant; soil incorporation provided slightly longer persistence (60 days) …

Specificity Of The Trail Pheromones Of Four Species Of Fire Ants, D. P. Jouvenaz, C. S. Lofgren, D. A. Carlson, W. A. Banks

Entomology Papers from Other Sources

The species specificity of trail pheromones of fire ants, Solenopsis spp., has been studied by Wilson (1962; Anim. Behav. 10: 137-47) and Barlin, Blum, and Brand (1976; J, Insect Physiol. 22: 839-44). Our study, stimulated by taxonomic advances since Wilson's work and conducted concurrently with that of Barlin et al., is presented here to confirm and supplement the latters' observations, and to report some differences in results.

Sex Pheromone Of The Tsetse Fly: Isolation, Identification, And Synthesis Of Contact Aphrodisiacs, D. A. Carlson, P. A. Langley, P. Huyton

Entomology Papers from Other Sources

Sex pheromones isolated from the cuticle of the female tsetse fly, Glossina morsitans morsitans Westwood, release mating behavior in the malefly at ultra- short range or upon contact with baited decoys. Three active components were iden- tified as 15,19-dimethylheptatriacontane, 17,21-dimethylheptatriacontane, and 15,19,23-trimethylheptatriacontane. Chemical and biological comparisons show that the natural and synthetic compounds are identical.

Genetic Method For The Preferential Elimination Of Females Of Anopheles Albimanus, J. A. Seawright, P. E. Kaiser, D. A. Dame, C. S. Lofgren

Entomology Papers from Other Sources

Recent field experiments demonstrated the possibility of using the sterile male method for the control of Anopheles albimanus Wiedemann, the most impor- tant vector of human malaria in Central America. Until now there was no practical method for excluding females from the releases of sterile males. A genetic method was developed for the preferential elimination of females during any of the four life stages. This genetic sexing system utilizes propoxur (o-isopropoxyphenyl methyl- carbamate) susceptibility as a recessive conditional lethal, a T(Y:2R) translocation, and an In(2R) inversion. The propoxur resistance allele (dominant) was linked to the Y chromosome via a radiation-induced …

Controle De Anticarsia Gemmatalis Hübner, 1818 (Lepidoptera- Noctuidae) Com Ph 6040 Em Baixas Dosagens, E. A. Heinrichs, R. F. Pires Da Silva

Department of Entomology: Faculty Publications

Em estudo realizado na Estação Experimental Agronômica da Universidade Federal du Rio Grande do Sul, foi verificada a ação de cinco dosagens de PH 6040 (1·(4-chlorophenyl)-3-(2,6 difluorobenzoyl)-Urea) sobre a «Lagarta da soja», Anticarsia gemmatalis.

Em blocos casualizados, o produto foi testado nas dosagens de 5, 10, 20, 40 e 80 gramas de p.a./ha. A análise estatistica evidenciou superioridade das dosagens de 20, 40 e 80 gramas, que proporcionaram periodo mais longo de proteção das plantas contra o desfolhamento provocado pela prage bem como maiores rendimentos de grãos.

Avaliação Dos Danos Causados Por (Westwood, 1837) (Hemiptera, Pentatomidae), Em Diferen Tes Niveis E Épocas De Infestação, Na Qualidade Da Semente De Soja (Glycine Max (L.) Merrill), M. H. M. Galileo, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

Assessment of soybean seed quality in relation to the damage caused by Piezodorus guildinii (Westwood, 1837) (Hemiptera, Pentatornidae) at various infestation levels and at diferent stages of soybean development (Glycine max (L.) Merrill). Stinkbug effect on soybean seed quality was studied. Field tests were carried out in Guaiba, Rio Grande do Sul, 1974/75. Soybean plants were artificially infested at various densities of Piezodorus guildinii (Westwood, 1837) per 0.5m of row and at different stages of soybean development by means of isolation cages. Stinkbug infestations restricted from full bloom up to the beginning of pod formation do not result in …

Retençáo Foliar Em Plantas De Soja (Glycine Max (L.) Merrill), Resultante Da Açáo De Piezodorus Guildinii (Westwood, 1837) (Hemiptera, Pentatomidae), Em Diferentes Níveis E Épocas De Infestaçáo, M. H.M. Galileo, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

Foliar retention in soybean (Glyaine max (L.) Merril) as effected by levels and period of infestation with Piezodorus guildinii (Westwood, 1837) (Herniptera, Pentatornidae)

The effect of stinkbug on foliar retention in soybean was studied. Field tests were carried out in Guaiba, Rio Grande do Sul, 1974/75. Soybean plants were artificially infested at various densities of Piezodorus guildinii (Westwood, 1837), per 0,5m of row and at different stages of soybean development by means of isolation cages. Foliar retention occurred when plants were infested continuosly, from full to the complete physiological maturity of the seed. This phenomenon was not observed when infestations …

Inseticidas Sistémicos E Endrin Aplicados No Controle De Elasmopalpus Lignosellus, E Seus Efeitos Sobre A Soja, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

Foi conduzido um experimento a campo, na Estação Experimental Agronômica da UFRGS, em Guaíba, RS, com o objetivo de determinar o efeito de vários inseticidas no controle da “broca-do-colo,” Elasmopalpus lignosellus (Zeller, 1848). Os tratamentos aplicados foram: 2 dosagens de Carbofuran no tratamento de sementes; 2 dosagens de Carbofuran, Aldicarb e Disulfoton granulado, aplicado no sulco na época do plantio; e 2 tratamentos de Endrin de 1 e 3 pulverizações no período de pós-emergência. Os resultados indicaram que apenas dois tratamentos com Endrin controlaram a broca. Rendimentos altos nos tratamentos com Endrin e Carbofuran granulado foram atribuídos ao controle da …

An Evaluation Of Treatment Recommendations For The Greenbug, Schizaphis Graminum, On Susceptible Grain Sorghum In The Clay County, Nebraska Pest Management Project, Bruce John Monke

Open Access Master's Theses (through 2010)

All fields involved in this study were located in Clay County, Nebraska and were farmed by cooperators in the Pest Management Project. Many of the field procedures were adapted from those used by the University of Nebraska Agronomy Department Outstate Testing Service. The purpose of this study was to examine, under Nebraska conditions, the accuracy of the currently accepted guidelines for determining the necessity of greenbug control on grain sorghum.

The data in this study do not support specific guidelines based only on greenbug populations or plant damage sustained due to greenbug feeding, for controlling greenbugs on susceptible grain sorghum. …

Anatomy Of The Adults Of Loxagrotis Albicosta, C.Y. Oseto, T.J. Helms

University Studies (University of Nebraska) (1888–1984)

LEPIDOPTERA are divided into the major suborders Monotrysia and Ditrysia (Borner, 1939). The vast majority of Lepidoptera belong to the Ditrysia. The Noctuidae, which is the largest family in the order, is probably the most destructive (Metcalf, et aI., 1962). It includes Loxagrotis albicosta (Smith), the western bean cutworm, originally a pest of field beans, which has become a relatively serious pest of corn in southwestern and central Nebraska (Hagen and Roselle, 1972). Adults emerge from early July to late August, and eggs, which are deposited on the upper sides of corn leaves, hatch in approximately I week. The newly …

Notes On The Biology Of Euphoriaspis Hirtipes (Horn) And Descriptions Of The Larva And Pupa (Coleoptera: Scarabaeidae), Brett C. Ratcliffe

University of Nebraska State Museum: Entomology Papers

Euphoriaspis hirtipes (Horn) is a myrmecophilous scarab that occurs only in portions of the prairie region of the central United States. The immature stages are passed within the thatch nests of the genus Formica. The eggs remain unknown, but the third instar larva and the pupa are described and illustrated.

A Revision Of The Genus Strategus (Coleoptera: Scarabaeidae), Brett C. Ratcliffe

University of Nebraska State Museum: Entomology Papers

The New World genus Strategus Kirby is here defined and revised for the first time. Eight species are described as new: S. atlanticus, S. caymani, S. craigi, S. hipposiderus, S. howdeni, S. longichomperus, S. symphenax, and S. tarquinius; 12 new junior synonyms are established (including the rejection of six previously valid species); one species is raised from synonymy; and two new replacement names are proposed. Strategus now contains one fossil species and 31 valid extant species. A key to the males and females of all the species is provided for the first time. All taxa are described or redescribed …

A D-Vac Calibration Technique, K. P. Pruess, R. W. Whitmore

Department of Entomology: Faculty Publications

Removal samples from an irrigated pasture were used as a calibration technique for the D-Vac. Plots 4 m² were enclosed with a frame, and 1 initial and 3 removal samples were taken. Equations are given for computing the population and probability of collecting an insect. For leafhopper adults, leafhopper nymphs, Orius insidiosus (Say), and corn flea beetle, Chaetocnema pulicaria Melsheimer, calibrations (m²/linear m) were 0.405, 0.328, 0.272, and 0.490, respectively.

Department Of Entomology Newsletter - No. 4, 1976, Lyle E. Klostermeyer Editor

Hexapod Herald and Other Entomology Department Newsletters

The Newsletter Committee has succeeded in documenting departmental activities in an outstanding manner. All of us in the department appreciate the wonderful efforts and many hours spent by the Newsletter Committee: Brett Ratcliffe, Ron Rivers, Bruce Monke, Tim Miller and particularly the leadership of Lyle Klostermeyer as Committee Chairman. The typing assistance of our secretarial staff is greatly appreciated. The many changes in personnel and programs that have taken place during the period since the 1968 publication of Departmental Newsletter No.3 are well covered in various sections of the newsletter. We also compliment the Committee on their choice of dedicating …

A Revision Of The Genus Strategus (Coleoptera: Scarabaeidae), Brett C. Ratcliffe

Bulletin of the University of Nebraska State Museum (1924–2023)

The New World genus Strategus Kirby is here defined and revised for the first time. Eight species are described as new: S. atlanticus, S. caymani, S. craigi, S. hipposiderus, S. howdeni, S. longichomperus, S. symphenax, and S. tarquinius; 12 new junior synonyms are established (including the rejection of six previously valid species)'; one species is raised from synonymy; and two new replacement names are proposed. Strategus now contains one fossil species and 31 valid extant species. A key to the males and females of all the species is provided for the first …

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

Nebraska Agricultural Experiment Station: Historical Research Bulletins

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

Nebraska Agricultural Experiment Station: Historical Research Bulletins

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.

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.

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

Bulletin of the University of Nebraska State Museum (1924–2023)

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 (1924–2023)

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 (1924–2023)

"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 …

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 (1924–2023)

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