Entomology Commons^™

Semiochemicals From Anal Exudate Of Larvae Of Tsetse Flies Glossina Morsitans Morsitans Westwood And G. Morsitans Centralis Machado Attract Gravid Females, David E. Leonard, R. K. Saini

All Peer-Reviewed Publications

Tsetse flies (Diptera: Glossinidae:Glossina) mature their offspring in utero, giving birth to mature larvae that burrow into soil and pupariate. During the hot dry seasons, puparia of some species of tsetse are aggregated in areas of deep shade in dense thickets. We have confirmed the presence of a semiochemical from the prepupariation excretions of larvae of Glossina morsitans morsitans Westwood and report a similar semiochemical in Glossina morsitans centralis Machado. These semiochemicals are attractive to gravid females and result in the aggregation of puparia. Behavioral studies with G. m. centralis showed that a higher percentage of females larviposited over moist …

Fifteen Years Of Colony Dynamics In Pogonomyrmex Occidentalis, The Western Harvester Ant, In Western Nebraska, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Ecological communities respond to environ- mental changes as the individuals of the component species die and are replaced. Thus, pat- terns of population turnover form an important aspect of community processes. Much less is known about species of long-lived individuals than of short-lived ones (Likens, 1989).

Instantaneous observations of age structure can be used to infer long-term dynamics but not all species can be aged retrospectively. Inferring life- history dynamics from current populations requires assumptions that are hard to verify. Following marked colonies of long-lived species is slow but provides direct, non-inferential data on population dynamics, although those are specific …

Studies On The Maturation-Accelerating Pheromone Of The Desert Locust Schistocerca Gregaria (Orthoptera: Acrididae), Hassane Mahamat, Ahmed Hassanali, Hezekiel Odongo, Baldwyn Torto, El Sayeed El-Bashir

All Peer-Reviewed Publications

The accelerating effect of mature males of the desert locust, Schistocerca gregaria, on the maturation of immature male and female conspecifics was confirmed. The onset of sexual activity was found to correlate with yellowing of the male insects. Using the colour as an indicator of maturation, the maturation-hastening effect of an hexane extract from mature males was also confirmed. Likewise, volatiles from mature males placed in the upper storey of a two-chamber bioassay system (no visual or tactile contact possible) and charcoal-trapped volatiles from the mature males also induced accelerated maturation in recipient males placed in the lower storey. GC …

Nebline, August 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Food, Families, and Finance

The Cloverline: 4-H News & Events

Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Nebraska Association for Family and Community Education News

and other extension news and events

1993 Lancaster County Fair Edition

Evidence For Mediation Of Two Releaser Pheromones In The Aggregation Behavior Of The Gregarious Desert Locust, Schistocerca Gregaria (Forskal) (Orthoptera: Acrididae), Daniel Obeng-Ofori, Baldwyn Torto, Ahmed Hassanali

All Peer-Reviewed Publications

The response of nymphal and adult gregarious phase desert locust, Schistocerca gregaria, to a choice of two columns of air, one permeated with airborne volatiles emanating from nymphs or adults and the other untreated, was investigated in a single-chamber bioassay arena. The nymphs, whether released individually or in groups, preferred to be within the precinct of the air column treated with airborne volatiles of the nymphs but were indifferent to volatiles of the adults. Conversely, older adults responded only to their own volatiles but not to those of the nymphs or young adults. The young adults were responsive only to …

Hexapod Herald - Vol. 4, No. 4, July 1, 1993

Hexapod Herald and Other Entomology Department Newsletters

Publications

Grants

Thank you

Congratulations

Welcome

Calendar of events

Travelers

Miscellaneous

Happy birthday

Nebline, July 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Food, Families, and Finance

The Cloverline: 4-H News & Events Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Home Extension Club News

and other extension news and events

Pheromonal Composition Of Two Species Of African Amblyomma Ticks: Similarities, Differences And Possible Species Specific Components, Thomas Lem Price Jr.

Biological Sciences Theses & Dissertations

Two species of bont ticks, Amblyomma hebraeum and Amblyomma variegatum, common to Africa have been studied to compare types and quantities of compounds known or believed to serve as components of the attraction-aggregation-attachment pheromone (AAAP). A complex of attraction, aggregation and attachment pheromones are used by these ticks to detect hosts, mates and perhaps minimize interspecific breeding. Solvent extraction of pheromone emitting ticks followed by Gas Chromatography and Mass Spectrometry revealed little difference in the composition of the AAAP in these two species. However, subtle differences in the relative makeup of the pheromonal blend are noted, suggesting that such differences …

Nebline, June 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Food, Families, and Finance

The Cloverline: 4-H News & Events

Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Home Extension Club News

and other extension news and events

Two New Species Of Lestodiplosini (Diptera: Cecidomyiidae) Preying On Homoptera And Thysanoptera In Southern Florida, Raymond Gagne, Fred Bennett

USDA Systematic Entomology Laboratory

Two new species of predaceous Lestodiplosini from southern Florida are described and illustrated. Lestodiplosis laticaulis Gagne preys on Diaspis echinocacti (Bouche) (Homoptera: Coccoidea: Diaspididae), and Thripsobremia thripivora Gagne preys on Gynaikothrips ficorum (Marchal) (Thysanoptera: Phlaeothripidae) and Trioza magnoliae (Ashmead) (Homoptera: Psyllidae). The new species are compared to their congeners and the status of Thripsobremia is discussed.

Hexapod Herald - Vol. 4, No. 3, May 12, 1993

Hexapod Herald and Other Entomology Department Newsletters

Grants

Congratulations

Publications

Miscellaneous

Announcements

Calendar of events

The Mayfly Newsletter, Peter M. Grant

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.

Nebline, May 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Food, Families, and Finance

The Cloverline: 4-H News & Events

Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Home Extension Club News

and other extension news and events

Hexapod Herald - Vol. 4, No. 2, April 14, 1993

Hexapod Herald and Other Entomology Department Newsletters

Grants

Department travelers

Publications

Announcements

Calendar of events

Nebline, April 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Food, Families, and Finance

The Cloverline: 4-H News & Events Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Home Extension Club News

and other extension news and events

Nebline, March 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Home Extension News

Expanded Food and Nutrition Education Program (EFNEP) News

Home Extension Club News

The Cloverline: 4-H News & Events

Extension Calendar

and other extension news and events

New Species Of Cerobasis And Psyllipsocus From Mexico, And A List Of Mexican Trogiomorpha (Psocoptera), Alfonso Neri Garcia Aldrete

Insecta Mundi

Three new species of Cerobasis (Trogiidae) and three new species of Psyllipsocus (Psyllipsocidae) from Mexico are here described, which rises to seven the number of Mexican Cerobasis, and rises to nine the number of Mexican Psyllipsocus. Identification keys for the Mexican species of both genera are provided. The Mexican species of Trogiomorpha are thus known to consist of 46 species, of which 25 (54%) are endemic to this country. Lists of Cerobasis and Psyllipsocus species are presented, as well as a list of the known Mexican Trogiomorpha, including the distribution in this country of each species.

South American Oxybelus Iii. The Uniglumis And Scutellatus Groups (Hymenoptera, Sphecidae)., Richard M. Bohart

Insecta Mundi

Twenty-four of the larger species of Oxybelus occurring in South America (except Chile) are recognized. Akey is given and illustrations are provided of the critical thoracic projections: metanotal squamae and propodeal mucro. New species described and their type localities are: aganis (Paraguay), cyaneus (Colombia), decoris (Brazil), fraternus (Argentina), frontis, (Argentina), huae Wcuador), napoensis (Ecuador), osteni, (Argentina), peruensis (Peru), peruvicus (Peru), plaumanni (Brazil), roraimae (Brazil), scutellatus (Argentina), tartagalae (Argentina) and willinki (Argentina).

South American Oxybelus Ii. The Emarginatus Group (Hymenoptera, Sphecidae), Richard M. Bohart

Insecta Mundi

The 13 South American members of the Oxybelus emarginatus group are keyed, new species described, and illustrations given. New species are: cinemucro (Argentina), genisei (Brazil), mendozae (Argentina), schlingeri (Venezuela), schusteri (Galapagos), slanskyae (Peru), stangei (Argentina), vardyi (Peru), and wasbaueri (Ecuador).

Hexapod Herald - Vol. 4, No. 1, February 8, 1993

Hexapod Herald and Other Entomology Department Newsletters

Grants

Department travelers

Publications

Graduate students

Calendar of events

Announcements

Miscellaneous

Rural Flies In The Urban Environment?, Gustave D. Thomas, Steven R. Skoda

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Because metropolitan areas in the United States have been expanding at a dramatic rate, there has been direct competition between rural and urban interests for land. Also, market pressures often make it most profitable for meat producers to locate as close to urban centers as possible. A resultant growing interface between rural and urban centers, coupled with inadequate understanding of the people between the two centers, provides a potential for problems to develop. This book generally summarizes one area of contention - flies: few people tolerate flies in any setting anymore.

Nebline, February 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Home Extension News

Expanded Food and Nutrition Education Program (EFNEP) News

Home Extension Club News

The Cloverline: 4-H News & Events

Extension Calendar

and other extension news and events

Inhibition Of Glossina Morsitans Midgut Trypsin Activity By D-Glucosamine, E. O. Osir, M. O. Imbuga, P. Onyango

All Peer-Reviewed Publications

The effect of the amino sugar d-glucosamine on trypsin in crude midgut homogenates of Glossina morsitans morsitans was studied in vitro. The results showed that the midgut trypsin was specifically and competitively inhibited by d-Glucosamine. Glucose, fructose, mannose, inositol, galactose, galactosamine, N-acetyl-d-glucosamine, and methyl-α-d-glucosamine were ineffective as inhibitors, even at concentrations exceeding 600 mm. d-glucosamine also had a similar inhibitory effect on bovine pancreatic trypsin. In both cases, the inhibition was incomplete as shown by nonlinear Dixon plots. The Michaelis and inhibition constants estimated for the midgut trypsin were 41±2 μm and 68±3 mm, respectively. These results suggest that the …

War Against Codling Moth, Department Of Agriculture And Food, Western Australia

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

Residents of the tiny town of Bridgetown, in Western Australia's south-west, are at the front line in the campaign to eradicate an outbreak of codling moth from the State.

The Agriculture Protection Board, Department of Agriculture, Western Australian Quarantine and Inspection Service, and other agencies are involved in the eradication program.

Nebraska Butterflies, Stephen M. Spomer

University of Nebraska State Museum: Staff and Affiliates, Publications

Nebraska is a crossroads of butterfly diversity. Many species reach their distributional limits in Nebraska. The 100th meridian, which runs through central Nebraska, appears to be a good distributional limit for many species. In short, eastern Nebraska contains butterflies similar or identical to those found in most of the eastern United States, central Nebraska has both eastern and western butterflies, and western Nebraska has a butterfly fauna more like the Rocky Mountains or Black Hills. Over 200 species of butterflies have been recorded in Nebraska, which is a higher number than most of our neighboring states. Some of our butterflies …

Nebline, January 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

On-the-Grow: Horticulture News

Ag Update: Agricultural News & Events

Home Extension News

Expanded Food and Nutrition Education Program (EFNEP) News

Home Extension Club News

The Cloverline: 4-H News & Events

Extension Calendar

and other extension news and events

The Oxyporinae (Coleoptera: Staphylinidae) Of Illinois, Rodney S. Hanley

Masters Theses

The monogeneric subfamily Oxyporinae (Coleoptera: Staphylinidae) is composed of the genus Oxyporus Fabricius. Members of the genus are obligate inhabitants of higher, fleshy mushrooms. The Illinois fauna of Oxyporus includes nine species from two subgenera which are treated in this study. A key to the identification of adults, descriptions, fungal host lists, and distributional maps are provided for each species. The most commonly collected species in Illinois are O. occipitalis, O. stygicus, O. major, and O. vittatus; uncommon or rare species are O. lateralis, O. quinquemaculatus (a new record for Illinois), O. femoralis femoralis, …

The Relationship Between Lifespan And Reproduction In The Giant Waterbug (Belostoma Flumineum), Wendy Nixdorf

Masters Theses

The evolutionary significance of senescence and death is poorly understood. Life history theory suggests that the allocation of energy to growth or reproduction is necessarily associated with a decrease in energy available for maintenance of the soma. This study attempted to determine if an investment in reproduction would decrease longevity in the giant waterbug (Belostoma flumineum). Male and female waterbugs were collected from the field as last instar stage nymphs and maintained under controlled laboratory conditions. Individuals were randomly assigned to mating effort treatments, (virgins or breeders with breeding efforts ranging from 1 to >5 times). Following breeding, …

Experimental Immunity Against Trypanosomiasis In Rabbits, Curtis Powell

All Peer-Reviewed Publications

Rabbits were immunized with specially prepared subcellular fractions of a cloned Trypanosoma brucei brucei stock 427. One fraction was found to be highly immunoprophylactic in rabbits exposed to the vector fly genus Glossina m. morsitans (tsetse flies) infected with EATRO Trypanosoma brucei brucei 1969. The most immunoprotective fraction IPFA from T. b. brucei 427 gave 75% protection to animals challenged by EATRO T. b. brucei 1969. IPFA also showed the highest IgG antibody titre against the heterologous and homologous strains. In in vitro studies, the sera from these immunized rabbits killed different strains of parasites, T. b. brucei strains 1969 …

The Influence Of Host Blood On Infection Rates In Glossina Morsitans Sspp. Infected With Trypanosoma Congolense, T. Brucei And T. Simiae, S. Mihok, R. O. Olubayo, N. Darji, E. Zweygarth

All Peer-Reviewed Publications

Trypanosoma congolense, T. brucei and T. simiae isolated from wild-caught Glossina pallidipes were fed to laboratory-reared G. morsitans centralis and G. m. morsitans to determine the effect of host blood at the time of the infective feed on infection rates. Bloodstream forms of trypanosomes were membrane-fed to flies either neat, or mixed with blood from cows, goats, pigs, buffalo, eland, waterbuck and oryx. The use of different bloods for the infective feed resulted in differences in infection rates that were repeatable for both tsetse subspecies and most parasite stocks. Goat, and to a lesser extent, pig blood facilitated infection, producing …