Entomology Commons^™

Development Of Multiple Pest Resistant Crop Cultivars, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

Insects are one, among a number, of biotic and abiotic constraints that limit the production of food crops. Entomologists can play a key role in increasing food production through the development of insect-resistant crop cultivars. Resistant cultivars are sought as a major tactic in the development of IPM strategies and have been shown to be compatible with biological, chemical and cultural control tactics. There has been significant progress in the breeding and commercial utilization of multiple pest resistant crop cultivars having resistance to insects, diseases and nematodes. The most notable examples are rice cultivars which are grown on millions of …

Eicosanoids Mediate Insect Nodulation Responses To Bacterial Infections, Jon S. Miller, Tuanh Nguyen, David W. Stanley-Samuelson

Department of Entomology: Faculty Publications

We propose that nodule formation is mediated by eicosanoids in insects. Nodulation is the temporally and quantitatively predominant cellular defense response to bacterial infection in insects and other invertebrates. Inhibition of eicosanoid biosynthesis in larvae of the tobacco hornworn Manduca sexta immediately prior to intrahemocoelic infections with the bacterium Serratia marcescens strongly reduced the nodulation response. Inhibition of eicosanoid biosynthesis also reduced formation of cellular aggregates at 1 hr postinfection, which indicates that eicosanoids mediate early stages of nodulation. Separate treatments with specific inhibitors of phospholipase A₂, cyclooxygenase, and lipoxygenase reduced nodulation, which supports the view that nodule …

Subcellular Distribution And Characterization Of Esterase Isozymes From Insecticide-Resistant And -Susceptible Strains Of German Cockroach (Dictyoptera: Blatlellidae), Suresh K. Prabhakaran, Shripat T. Kamble

Department of Entomology: Faculty Publications

Esterases from insecticide-resistant and -susceptible strains of German cockroach, Blattella germanica (L.), were isolated and analyzed for differences in activity. The isozymes E5, E6, E7, and E8 of resistant strains indicated about two- to fivefold increases in activity compared with those of the susceptible strain. These isozymes constituted ≈60% of the total activity in the resistant strains, whereas they contributed only about 40% activity in the susceptible strain. Subcellular distribution studies showed that most esterase activity is present in the 100,000 x g fraction of the homogenate (cytosolic). Only a small portion of activity was membrane bound. Molecular weights of …

Registration Of Eight Hessian Fly Resistant Common Winter Wheat Germplasm Lines (Carol, Erin, Flynn, Iris, Joy, Karen, Lola, And Molly), F. L. Patterson, F. B. Maas Iii, John E. Foster, R. H. Ratcliffe, S. Cambron, G. Safranski, P. L. Taylor, H. W. Ohm

Department of Entomology: Faculty Publications

Eight genes for resistance to Hessian fly, Mayetiola destructor (Say), were transferred individually by backcrossing and selfing into 'Newton' (Cl 17715) wheat (Triticum aestivum L.), a commercial hard red winter cultivar susceptible to all Hessian fly biotypes to which it has been tested. The eight germplasm lines (Table 1) were developed by the Purdue University Agricultural Experiment Station in cooperation with the USDAARS, with release in 1993. Newton is the source of the cytoplasm of the germplasm lines. Newton has a moderate level of winterhardiness suitable for commercial production in Kansas. The germplasm lines have not been tested adequately …

Nebline, December 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Horticulture

Rural $ense

Human Resources

4-H & Youth

Environmental Focus

Community & Leadership Development

Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Nebraska Association for Family and Community Education News

and other extension news and events

New Species Of Hydrellia (Diptera: Ephydridae) From The Southern United States, D. L. Deonier

Insecta Mundi

Five new species of Hydrellia Robineau-Desvoidy are described from localities in Alabama, Florida, Louisiana, and Texas. H. alabamae, n. sp. was first collected on water primrose in northern Alabama and later in northern Florida on Nuphar and Nymphoides. At present, there is no indication about potential host plant species. H. naiadis, n. sp. was reared from Najas guadalupensis (Spreng) Morong in northern Florida and later collected throughout the state and also in southeastern Texas. H. apalachee, n. sp., first collected in northern Florida and later in northern Alabama, is unique among described Hydrellia in having a …

A New Genus And Two New Species Of Luperini (Coleoptera: Chrysomelidae: Galerucinae) From Costa Rica, Shawn M. Clark

Insecta Mundi

Inbioluperus (new genus), I. flowersi (new species), and I. costipennis (new species) are all described from Costa Rica.

United States Patent: 609 Buffalograss, Terrance P. Riordan, Frederick P. Baxendale, Susan De Shazer, Edward Kinbacher, Jeana Svoboda, Milton Engelke, Leonard Wit, Jr.

Department of Entomology: Faculty Publications

A vegetatively reproduced buffalograss cultivar, named 609 Buffalograss, is distinguished by its excellent overall turfgrass quality, rate of establishment, good cold tolerance, high density, and excellent color. This cultivar is adapted to low maintenance conditions and has the ability to maintain growth and color later into the fall than other warm season grasses.

Nebline, November 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Horticulture

Rural $ense

Human Resources

4-H & Youth

Environmental Focus

Community & Leadership Development

Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Nebraska Association for Family and Community Education News

and other extension news and events

Nebline, October 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

Weed Awareness Special Edition

Affects Of Larval Injury By Western Corn Rootworm (Coleoptera: Chrysomelidae) On Gas Exchange Parameters Of Field Corn, L. D. Godfrey, Lance J. Meinke, Robert J. Wright

Department of Entomology: Faculty Publications

The effect of larval-induced root injury by western corn rootworm, Diabrotica virgifera virgifera LeConte, on plant physiological parameters of field corn (Zea mays L.) was examined in a 2-yr field study. Controlled infestations of 200, 500, and 1,000 eggs per 30.5 row-cm were established in an irrigated, silty clay loam soil in 1989 and in silty clay loam, loam, and sandy loam soil textures with irrigated and dryland treatments in 1990. Infestations were made 16 d after planting and at planting in 1989 and 1990, respectively. Gas exchange parameters were examined before egg hatch, during the injury period, and …

Vegetative And Reproductive Biomass Accumulation In Field Corn: Response To Root Injury By Western Corn Rootworm (Coleoptera: Chrysomelidae), L. D. Godfrey, Lance J. Meinke, Robert J. Wright

Department of Entomology: Faculty Publications

A 2-yr field study was conducted to evaluate the effects of larval injury by western corn rootworm, Diabrotica virgifera virgifera LeConte, on vegetative and reproductive biomass accumulation of field corn, Zea mays L. Studies in 1989 were conducted in irrigated, silty clay loam soil, whereas in 1990, the possible interacting effects of soil texture (silty clay loam, loam, and sandy loam) and soil moisture (furrow-irrigated and dryland) were examined. In both years, during the early phases of injury (feeding by first and second instars), the vegetative biomass was detrimentally affected. Larval infestations reduced leaf area and leafwet weight by up …

Efficacy And Persistence Of Steinernema Carpocapsae (Rhabditida: Steinemematidae) Applied Through A Center-Pivot Irrigation System Against Larval Corn Rootworms (Coleoptera: Chrysomelidae), Robert J. Wright, J. F. Witkowski, G. Echtenkamp, R. Georgis

Department of Entomology: Faculty Publications

We evaluated control of natural and artificially infested populations of larval com rootworms (Diabrotica virgifera virgifera LeConte and D. barberi Smith & Lawrence) in corn (Zea mays L.) treated with entomopathogenic nematodes, Steinernema carpocapsae (Weiser); All strain, applied after planting through a center-pivot irrigation system at 2.5 and 1.2 x 10⁹ infective juvenile nematodes per hectare. We compared control achieved with nematodes with that achieved with planting time applications of terbufos (Counter 15G [granular]; 9.9 kg [AI]/ha) and chlorpyrifos (Lorsban 4E [emulsion]; 1.12 kg [AI]/ha) applied after planting through an irrigation system, and with an untreated (water …

Nebline, September 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

Rural Resource Guide Special Edition

A Synopsis Of Central American And Caribbean Oxybelus (Hymenoptera, Sphecidae), Richard M. Bohart

Insecta Mundi

The 37 recognized Oxybelus of Central America and the Caribbean are listed, a key given, and the critical thoracic projections figured for many of the species. New species are coloratus (Mexico), irwini (El Salvador), jamaicae (Jamaica), melanitus (Mexico), morrisoni (Puerto Rico), propodealis (Honduras), rhodopyga (Mexico), and romingeri (Hispaniola). New synonyms of mexicanus Robertson 1889 are frontalis Robertson 1889, bugabensis Cameron 1891, and longispina Cameron 1891.

A Critical Taxonomic Analysis Of The Hydrellia Pakistanae Species Group (Diptera: Ephydridae), D. L. Deonier

Insecta Mundi

Critical taxonomic analysis of the Hydrellia pakistanae species group yielded H. pakistanae Deonier, H. sarahae, n.sp. (composed of H. sarahae sarahae, n.ssp. in China and H. sarahae laticapsula, n.ssp. in India and Pakistan), H. balciunasi Bock known only from Australia, and a related species, H. bogorae, n.sp. from Java, Indonesia. These species all have the same primary host-plant species, i.e., Hydrilla verticillata, a fact making them all potential biocontrol agents for this aquatic plant pest in North America and other areas where it has pest status. Morphology is summarized as well as perceived synapomorphies of …

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 …

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

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

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

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).