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Articles 8581 - 8610 of 11444

Full-Text Articles in Entomology

Nomenclatural And Systematic Changes In The Neotropical Caddisflies (Insecta: Trichoptera), Oliver S. Flint Jr, Ralph W. Holzenthal, Steven C. Harris Mar 1999

Nomenclatural And Systematic Changes In The Neotropical Caddisflies (Insecta: Trichoptera), Oliver S. Flint Jr, Ralph W. Holzenthal, Steven C. Harris

Insecta Mundi

Recent work on a catalog of the Neotropical caddisflies has resulted in the recognition of the need to make numerous lectotype designations, new names for homonyms, specific and generic synonymies, transfers of species between genera and genera between families, and placement of many long ignored names of Muller and others. Rationales are presented for all actions, many of which had been known for years as the result of examination of types, but no opportunity had arisen to publish them, others became apparent as a result of the cataloging. This opportunity is taken to present all of those known to us …


The Culicoides (Diptera: Ceratopogonidae) Of Belize, Central America, Deborah S. Brickle, Daniel V. Hagan Mar 1999

The Culicoides (Diptera: Ceratopogonidae) Of Belize, Central America, Deborah S. Brickle, Daniel V. Hagan

Insecta Mundi

The Culicoides fauna of Belize is poorly known, and until 1974 only 3 species were recorded. Nineteen species of Culicoides from Belize were identified from six collection sites: C. barbosai Wirth & Blanton, C. crepuscularis Malloch, C. debilipalpis Lutz, C. diabolicus Hoffman, C . foxi Ortiz, C. furens (Poey), C . gabaldoni Ortiz, C. heliconiae Fox & Hoffman, C. hoffmani Fox, C. imitator Ortiz, C. insignis Lutz, C. jamaicensis Edwards, C. leopoldoi Ortiz, C. limai Barretto, C. paraensis (Goeldi), C . pifanoi Ortiz, C. pusilloidesWirth & Blanton, C. pusillus Lutz, and a new species, C. mckeeveri Brickle & Hagan …


Review Of The Genus Dendrocoris Bergroth With Descriptions Of New Species (Pentatomidae: Heteroptera), Donald B. Thomas, Harry Brailovsky Mar 1999

Review Of The Genus Dendrocoris Bergroth With Descriptions Of New Species (Pentatomidae: Heteroptera), Donald B. Thomas, Harry Brailovsky

Insecta Mundi

The procleticine genus Dendrocoris Bergroth is revised with the descriptions of three new species from the United States, D. nelsoni, Mexico, D. inermis, and Guatemala, D. guatemalensis. A diagnosis is provided for each species with notes on distribution and host plants. A key is provided for determination of all fourteen species.


Description Of A New Genus, Sayapion, From North And Central America (Coleoptera: Apionidae), David G. Kissinger Mar 1999

Description Of A New Genus, Sayapion, From North And Central America (Coleoptera: Apionidae), David G. Kissinger

Insecta Mundi

A new genus, Sayapion Kissinger (type-species: Apion segnipes Say) is proposed for the 10 members of the Apion segnipes species group of Coelocephalapion Wagner orphaned when Coelocephalapion Wagner was raised to generic level (Kissinger, 1992). The species transferred from Apion to Sayapion as new combinations are as follows: Sayapion aponipes (Kissinger), S. arizonae (Fall), S. basale (Sharp), S. cinereurn (Gerstaecker), S. laterale (Sharp), S. paranipes (Kissinger), S. pronipes (Kissinger), S. segnipes (Say), S. sublaterale Wssinger), and S. terale (Kissinger).


The Snail-Killing Flies Of Alaska (Diptera: Sciomyzidae), B. A. Foote, L. V. Knutson, J. B. Keiper Mar 1999

The Snail-Killing Flies Of Alaska (Diptera: Sciomyzidae), B. A. Foote, L. V. Knutson, J. B. Keiper

Insecta Mundi

Information is given on the geographic distribution, habitat preferences, larval foods, and immature stages for 57 species of 9 genera of Sciomyzidae known to occur in Alaska. An illustrated key to adults is included. Alaska as a habitat for sciomyzid flies is discussed, and information on feeding habits of the larvae is summarized.


First Notice Of Therion From South America With Description Of Two New Species From Argentina And Bolivia (Hymenoptera: Ichneumonidae), Charles C. Porter Mar 1999

First Notice Of Therion From South America With Description Of Two New Species From Argentina And Bolivia (Hymenoptera: Ichneumonidae), Charles C. Porter

Insecta Mundi

Abstract: Therion Curtis (Ichneumonidae: Anomalinae) has a nearly cosmopolitan geographic distribution but has not previously been recorded from South America. In most Therion the tarsal claws are simple or have only a few inconspicuous teeth near the base. The new species described herein are distinctive, therefore, because they have the tarsal claws conspicuously pectinate over at least 0.8 the distance from base to apex. Therion ranti n. sp. from Cordoba and Mendoza Provinces of Argentina may be recognized by its almost uniformly red mesosoma and basally elevated clypeus. In Therion wileyi n. sp., from the Andean puna near La Paz …


Cave-Dwelling Nesticidae (Araneae) In The Southeastern United States: New Distribution Records And Notes On Their Bionomics, Will Reeves Mar 1999

Cave-Dwelling Nesticidae (Araneae) In The Southeastern United States: New Distribution Records And Notes On Their Bionomics, Will Reeves

Insecta Mundi

The Nesticidae are a worldwide family of small, sedentary spiders frequently found in leaf litter, debris, houses, and caves. The genus Gaucelmus is found only in the Americas, primarily in the Neotropics. Nesticus, a Holarctic genus, is well represented in the Appalachian Mountains by obligate cave-dwelling species (Gertsch 1984). The genus Eidmannella is an American genus recently introduced by humans to Europe and Hawaii (Gertsch 1984). The natural history, including fecundity and prey types, of cave spiders are poorly documented. Here I report a range extension of Gaucelmus augustinus Keyserling and natural-history information for N. georgia Gertsch and N. …


Nebline, March 1999 Mar 1999

Nebline, March 1999

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Weed control a universal concern
National Agricultural Day-March 20
Accessing extension information
One garden, many uses
Easter lily care
All America Selection winners for 1999
Cover or uncover?
Build a nest box to attract birds
What makes the water cycle polluted?
earth wellness festival
Make your own water filter
Wetland factoids
Questions about liming acid soils
Watch for chinch bugs in ‘99
Cut down on tillage with no-till or ridge-till
Introduction to precision agriculture
The “Blue Baby” Syndrome
Tractor safety tips (part 3)
How about that wood stove
Acreage Owner’s Guide available
Table manners
Healthy Eating: Strawberry Fruit Salad with …


Trypanosome Infection Rate In Cattle At Nguruman, Kenya, R. A. Tarimo-Nesbitt, T. K. Golder, R. D. Dransfield, M. F. Chaudhury, R. Brightwell Feb 1999

Trypanosome Infection Rate In Cattle At Nguruman, Kenya, R. A. Tarimo-Nesbitt, T. K. Golder, R. D. Dransfield, M. F. Chaudhury, R. Brightwell

All Peer-Reviewed Publications

Trypanosome infection rate in cattle at Nguruman was investigated in a study conducted in 1984-1986. Shifting pastoralism significantly reduced trypanosome infections in cattle. The cattle were more heavily infected with Trypanosoma congolense (16.5%) than Trypanosoma vivax (4.95%) and Trypanosoma brucei (0.19%). Trypanosoma theileri was observed only once among the cattle examined. Mixed trypanosome infections in cattle were observed to be 2.75% and 0.014% for T. congolense/T. vivax and T. congolense/T. brucei, respectively. The duration of infection in the cattle was 55 days for T. congolense and 79 days for T. vivax. High infections in cattle were observed 2 months after …


Crop Updates 1999 - Cereals, Len W. Broadbridge, Doug Abrecht, D. Bakker, Greg Hamilton, Cliff Spann, Doug Rowe, Peter Fisher, Jennifer Bignell, Matthew Braimbridge, Bill Bowden, Ross Brennan, Reg Lunt, Senthold Asseng, Cherie Rowles, Simon Bedbrook, Chris Gazey, Mike Bolland, Garren Knell, Lyn Abbott, Zed Rengel, Wayne Pluske, Erin Cahill, Bill Crabtree, Matthew Evans, Tim Nielsen, Jat Bhathal, Rob Loughman, D. Rasmussen, Roger A C Jones, Sean Kelly, Ian Riley, Sharyn Tayor, Vivien Vanstone, Dominie Wright, Debbie Thackray, Simon Mckirdy, George Yan, Robin Wilson, Iain Barclay, Robin Mclean, Dean A. Diepeveen, Bill Lambe, Wal Anderson, Brenda Shackley, Mechelle Owen, Peter Burgess, Ben Curtis, Mohammed A. Hamza, Jamie Henderson, Frank Boetel, Alfredo Impiglia, Frances Hoyle, Darshan Sharma, Pierre Fievez, Blakely Paynter, Glenn Macdonald, Kevin Young, Andrew Blake, Keith Devenish, P J. Dolling, Roy Latta, Lisa-Jane Blacklow, Chris Matthews, Angelo Loi, Brad Nutt, Rochelle Mcrobb, David Webb, Andrew Mcrobb, Clinton K. Revell, James Ridsdill-Smith, Celia Pavri, David Tennant, Darryl Mclements, Ross Thompson, Mike Ewing, Tim Woodburn, Paul Yeoh, James Fisher, Art Diggle, Mark Whitten, Andrew Rate, Paul Carlile, Ed Blanchard, Bevan Buirchell, Lorraine Osborne, Tress Walmsley, Terry Piper, Cameron Weeks, Michael Dodd, Amanda Falconer, Caroline Peek, Glenn Adam, Camray Gethin, Richard Guinness, Daniel Fels, Andrew Rintoul, Mal Lamond, Roger Tapp, Craig White Feb 1999

Crop Updates 1999 - Cereals, Len W. Broadbridge, Doug Abrecht, D. Bakker, Greg Hamilton, Cliff Spann, Doug Rowe, Peter Fisher, Jennifer Bignell, Matthew Braimbridge, Bill Bowden, Ross Brennan, Reg Lunt, Senthold Asseng, Cherie Rowles, Simon Bedbrook, Chris Gazey, Mike Bolland, Garren Knell, Lyn Abbott, Zed Rengel, Wayne Pluske, Erin Cahill, Bill Crabtree, Matthew Evans, Tim Nielsen, Jat Bhathal, Rob Loughman, D. Rasmussen, Roger A C Jones, Sean Kelly, Ian Riley, Sharyn Tayor, Vivien Vanstone, Dominie Wright, Debbie Thackray, Simon Mckirdy, George Yan, Robin Wilson, Iain Barclay, Robin Mclean, Dean A. Diepeveen, Bill Lambe, Wal Anderson, Brenda Shackley, Mechelle Owen, Peter Burgess, Ben Curtis, Mohammed A. Hamza, Jamie Henderson, Frank Boetel, Alfredo Impiglia, Frances Hoyle, Darshan Sharma, Pierre Fievez, Blakely Paynter, Glenn Macdonald, Kevin Young, Andrew Blake, Keith Devenish, P J. Dolling, Roy Latta, Lisa-Jane Blacklow, Chris Matthews, Angelo Loi, Brad Nutt, Rochelle Mcrobb, David Webb, Andrew Mcrobb, Clinton K. Revell, James Ridsdill-Smith, Celia Pavri, David Tennant, Darryl Mclements, Ross Thompson, Mike Ewing, Tim Woodburn, Paul Yeoh, James Fisher, Art Diggle, Mark Whitten, Andrew Rate, Paul Carlile, Ed Blanchard, Bevan Buirchell, Lorraine Osborne, Tress Walmsley, Terry Piper, Cameron Weeks, Michael Dodd, Amanda Falconer, Caroline Peek, Glenn Adam, Camray Gethin, Richard Guinness, Daniel Fels, Andrew Rintoul, Mal Lamond, Roger Tapp, Craig White

Crop Updates

This article covers sixty papers

FOREWORD

ACKNOWLEDGMENTS

PLENARY PAPERS

1. Western Australia’s climate: trends and opportunities, Len W. Broadbridge, Director, Bureau of Meterorology

2. Managing seasonal variations in agriculture, Dr Doug Abrecht, Director, Dryland Research Institute, Merredin

CROP ESTABLISHMENT

3. Soil management to prevent waterlogging on duplex soils in the Great Southern, D. Bakker, Greg Hamilton, Cliff Spann and Doug Rowe, Agriculture Western Australia

4. The influence of no-till and press wheels on crop production for heavy soils, Peter Fisher, Jennifer Bignell, Matthew Braimbridge, Greg Hamilton, Agriculture

Western Australia

NUTRITION

5. Fertiliser nitrogen, applied late, needs …


Book Review: The Cetoniine Beetles Of The World (Sakai, K. And S. Nagai), Brett C. Ratcliffe Feb 1999

Book Review: The Cetoniine Beetles Of The World (Sakai, K. And S. Nagai), Brett C. Ratcliffe

University of Nebraska State Museum: Entomology Papers

What a book! This fabulous contribution by Sakai and Nagai is Mushi-Sha's third volume in its Iconographic Series of Insects. The first volume was a similarly stunning treatment of the stag beetles (Lucanidae) of the world. In the cetoniine volume, the authors have illustrated, with the most superb photos imaginable, nearly 2,000 color photographs of cetoniine scarabs. The number of species illustrated is 1,704, and many of these are represented by multiple pictures to show color and pattern variation or sexual differences. Photos of 59 type specimens are also included. In what has to be a remarkable achievement, ALL of …


Nebline, February 1999 Feb 1999

Nebline, February 1999

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Remembering the 4-H lock-in
Reflections of Teen Leadership
1999 Perennial Plant of the Year
The garden corner
Using garden catalogs
A spoonful a day keeps the mole away
Mangy squirrels
Misplaced wildlife become problems
Beginning Beekeeping Workshop
Are squirrels using your bird feeders?
Try this trash game!
It’s fun!
Computerized financial record keeping
1999 Integrated Crop Management Winter Programs
Lime and other nutrients key to soil fertility
Reseeding CRP acres
Introduction to precision agriculture
Final private pesticide applicator training session
Fertilizing trees and shrubs
Tractor safety tips (part 2)
Battery maintenance tips
NEP teaches non-English Families Nutrition
Healthy Eating: Bread …


Carbaryl Susceptibility, Diagnostic Concentration Determination, And Synergism For U.S. Populations Of Western Corn Rootworm (Coleoptera: Chrysomelidae), Michael E. Scharf, Lance J. Meinke, Blair D. Siegfried, Robert J. Wright, Laurence D. Chandler Feb 1999

Carbaryl Susceptibility, Diagnostic Concentration Determination, And Synergism For U.S. Populations Of Western Corn Rootworm (Coleoptera: Chrysomelidae), Michael E. Scharf, Lance J. Meinke, Blair D. Siegfried, Robert J. Wright, Laurence D. Chandler

Department of Entomology: Faculty Publications

Baseline carbaryl susceptibility and potential resistance mechanisms were identified in U.S. populations of western corn rootworm, Diabrotica virgifera virgifera LeConte, using lethal concentration, diagnostic concentration, and synergism bioassays. Twenty-two adult rootworm populations were examined from the states of Indiana, Illinois, Iowa, Kansas, Nebraska, Ohio, Pennsylvania, South Dakota, Texas, and Virginia. Lethal concentration bioassays, conducted within carbaryl-coated glass vials on 12 populations, identified resistance in only 2 Nebraska populations. A diagnostic concentration of carbaryl was subsequently identified which caused 100 and 40% mortality in standard susceptible and known resistant populations, respectively. In diagnostic concentration bioassays on all 22 populations, substantial decreases …


Influence Of Rhopus Nigroclavatus (Hymenoptera: Encyrtidae) On The Mealybugs Tridiscus Sporoboli And Trionymus Sp. (Homoptera: Pseudococcidae), Tiffany Heng-Moss, Frederick P. Baxendale, Terrance P. Riordan, Linda J. Young Feb 1999

Influence Of Rhopus Nigroclavatus (Hymenoptera: Encyrtidae) On The Mealybugs Tridiscus Sporoboli And Trionymus Sp. (Homoptera: Pseudococcidae), Tiffany Heng-Moss, Frederick P. Baxendale, Terrance P. Riordan, Linda J. Young

Department of Entomology: Faculty Publications

This research investigated parasitism of the buffalograss mealybugs Tridiscus sporoboli (Cockerell) and Trionymus sp. by Rhopus nigroclavatus (Ashmead) through rearing and dissection studies, paired comparison tests, and a field survey. Rates of parasitism reported in this article reflect combined parasitism of the 2 mealybug species. In the rearing study, parasitism of adult female mealybugs by R. nigroclavatus was 48.6%, with an average emergence of 1.77 parasitoids per parasitized mealybug. A maximum of 7 R. nigroclavatus adults emerged from a single mealybug female. Mealybug dissections documented parasitism rates by R. nigroclavatus of 78.5, 67.5, and 4.3%, respectively, for adult females, 3rd …


A New Species Of Viridimicus Jameson From Honduras (Scarabaeidae: Rutelinae), Mary Liz Jameson Feb 1999

A New Species Of Viridimicus Jameson From Honduras (Scarabaeidae: Rutelinae), Mary Liz Jameson

University of Nebraska State Museum: Entomology Papers

Viridimicus omoaensis Jameson is described from Honduras. This species extends the distribution of the genus from Guatemala southwards in Mesoamerica. The characters that define the genus are expanded to include V. omoaensis. A key to the seven species in the genus is provided as well as additional locality notes for V. aurescens (Bates) and V. cyanochlorus Jameson.


Boom Sprayer Calibration For Pesticide Applications, Richard Beard, Howard M. Deer Feb 1999

Boom Sprayer Calibration For Pesticide Applications, Richard Beard, Howard M. Deer

All Current Publications

To protect your investment in agricultural pesticides, a boom sprayer should be calibrated at the start of the season and whenever application conditions change. Also, sprayer output should be periodically checked throughout the season to assure proper application rate. Although boom sprayers are calibrated in a variety of ways, each method utilizes the measurements of nozzle flow rate and equipment travel speed.


Dispersal Of Synanthropic Diptera: Lessons From The Past And Technology For The Future, Carl J. Jones, Scott A. Isard, M. Roberto Cortinas Jan 1999

Dispersal Of Synanthropic Diptera: Lessons From The Past And Technology For The Future, Carl J. Jones, Scott A. Isard, M. Roberto Cortinas

Department of Entomology: Faculty Publications

The impact of aerial invasion of new habitats by dispersal of synanthropic arthropods on human society is one of the most important topics in the entomological world. A review is presented of important advances in the knowledge of dispersal of a number of dipteran species that cause damage to, or serve as vectors for diseases of, humans and associated animals. The components of aerial dispersal are delineated, and forms of dispersal are defined in the context of interactive forces that result in dispersal by synanthropic Diptera. Migratory flights by black flies are put into ecological perspective, as are the wind-borne …


A New Hypatopa From Costa Rica (Gelechioidea: Coleophoridae: Blastobasinae), David Adamski Jan 1999

A New Hypatopa From Costa Rica (Gelechioidea: Coleophoridae: Blastobasinae), David Adamski

USDA Systematic Entomology Laboratory

Hypatopa tapadulcea is described from northwestern Costa Rica. A photograph of the imago and illustrations of wing venation and male and female genitalia are provided.


Green Canyon Recreation Management Plant, Jesse Evans, Erin Haddock, Todd Tibbetts, Lindsey Topham Jan 1999

Green Canyon Recreation Management Plant, Jesse Evans, Erin Haddock, Todd Tibbetts, Lindsey Topham

Green Canyon Environmental Research Area, Logan Utah

The purpose of this plan is to look at the way Green Canyon is currently being managed and make recommendations for management based on our findings. Prior to this document, a Landscape Assessment was conducted on Green Canyon. This plan incorporates that assessment but focuses on the recreation management of the canyon. We will discuss history, current management, social conditions, purpose and need, as well as methods we used to go about gathering information. The focus is to identify key issues and concerns within the canyon. Management recommendations will be made based on the issues and concerns identified.


Flea News 57 (January 1999), Robert E. Lewis Jan 1999

Flea News 57 (January 1999), Robert E. Lewis

Flea News

Mailing list changes

Miscellanea: The following article concerning plague in prairie dogs in Texas is taken from the July-August issue of the Technical Information Bulletin of the Armed Forces Pest Management Board.

Siphonaptera literature


A Comment On Friedlander’S Asterocampa (Nymphalidae, Apaturinae): Designation Of Neotypes For A. Celtis And A. Clyton, Ronald R. Gatrelle Jan 1999

A Comment On Friedlander’S Asterocampa (Nymphalidae, Apaturinae): Designation Of Neotypes For A. Celtis And A. Clyton, Ronald R. Gatrelle

The Taxonomic Report of the International Lepidoptera Survey

Friedlander’s 1986 [1987] treatment of the southeastern United States. taxa of Asterocampa is examined. Neotypes of A. celtis and A. clyton are designated from Burke County, Georgia to help stabilize the status of these taxa and aid in any future research. Asterocampa celtis is currently known to exist within at least 40 km of A. c. reinthali in Georgia. Their proximity, without integration, suggests evolutionary distance, perhaps even speciation. It is proposed that A. celtis is descended from A. c. alicia, and alicia from a Mexican refugium. Asterocampa clyton and A. …


Subspecific Status Of Southeastern U.S. Megathymus Cofaqui And M. Yuccae: Renaming Of The Florida Subspecies Of M. Cofaqui, Ronald R. Gatrele Jan 1999

Subspecific Status Of Southeastern U.S. Megathymus Cofaqui And M. Yuccae: Renaming Of The Florida Subspecies Of M. Cofaqui, Ronald R. Gatrele

The Taxonomic Report of the International Lepidoptera Survey

Megathymus cofaqui and M. yuccae are both represented in the southeastern United States by two subspecies. The type locality of both M. y. yuccae and M. c. cofaqui is the area of Burke/Screven counties Georgia. Each of their subspecies are primarily Floridian, with M. y. buchholzi extending along the immediate coast of Georgia into southern South Carolina. Topotypes of M. cofaqui from Burke County, Georgia, and Aiken County, South Carolina are phenotypically indistinguishable from both the holotype of M. cofaqui and topotypes of M. c. harrisi. Thus, M …


Artificial Alimentation Of Bees Using Natural Juices During The Dry Season, Ramiro Bernal Acosta Jan 1999

Artificial Alimentation Of Bees Using Natural Juices During The Dry Season, Ramiro Bernal Acosta

Theses and Dissertations

In the community of Tunshi San Nicols of the Licto parish in the Province of Chimborazo, an evaluation was done on the effect of an energetic supplementary feeding of bees (Italian-mestizas) during the dry season (September 23 to February 20). These supplements consisted of carrot juice (T1), orange juice (T2) and sugar cane juice (T3). These supplements were also compared to a control group (T0). The experimental units consisted of 16 standard beehives distributed randomly with the 4 treatments and 4 repetitions of each treatment. The results showed that sugar cane juice (T3) obtained the best results in the consumption …


Ecdysteroid Titers In Mated And Unmated Drosophila Melanogaster Females, Lawrence G. Harshman, Anne M. Loeb, Beth A. Johnson Jan 1999

Ecdysteroid Titers In Mated And Unmated Drosophila Melanogaster Females, Lawrence G. Harshman, Anne M. Loeb, Beth A. Johnson

Lawrence G. Harshman Publications

Radioimmunoassay was used to determine ecdysteroid titers in mated or unmated Drosophila melanogaster females. Whole-body ecdysteroid titers increase after mating and this response is more pronounced after 12–24 hours than it is immediately after mating. In one experiment, females were mated to transgenic males deficient in accessory gland proteins to test whether these peptides mediate the observed increase in female whole-body ecdysteroid titers. Females mated to such transgenic males do not show a pronounced increase in whole-body ecdysteroid titers. The effect of mating on female hemolymph ecdysteroid titers was also investigated. Hemolymph ecdysteroid titers decrease after mating. The ecdysteroid titer …


Male Crucifer Flea Beetles Produce An Aggregation Pheromone, Chengwang Peng, Robert J. Bartelt, Michael J. Weiss Jan 1999

Male Crucifer Flea Beetles Produce An Aggregation Pheromone, Chengwang Peng, Robert J. Bartelt, Michael J. Weiss

Entomology Papers from Other Sources

The flea beetle, Phyllotreta cruciferae (Goeze), is a pest of crucifer crops throughout most of North America (Lamb, 1989). Adult beetle feeding on crucifer vegetables causes small pits in the epidermis, which affects the marketability (Vaughn & Hoy, 1993). Larger population of beetles can kill or stunt seedlings. In the northern Great Plains of the United States and Canada, this species is the most serious pest of spring-planted oilseed rape, Brassica napus and B. rapa (Lamb, 1989; Weiss et al., 1991). Overwintering adults feed on the cotyledons and stems, resulting in seedling mortality and causing the crop to mature unevenly …


Effects Of Dietary Precursors To Biogenic Amines On The Behavioural Response From Groups Of Caged Worker Honey Bees (Apis Mellifera) To The Alarm Pheromone Component Isopentyl Acetate, Jeffrey W. Harris, Joseph Woodring Jan 1999

Effects Of Dietary Precursors To Biogenic Amines On The Behavioural Response From Groups Of Caged Worker Honey Bees (Apis Mellifera) To The Alarm Pheromone Component Isopentyl Acetate, Jeffrey W. Harris, Joseph Woodring

Entomology Papers from Other Sources

The sound or `buzzing response' from groups of fifteen worker honey bees, Apis mellifera L., to the presentation of isopentyl acetate, an alarm pheromone component, was recorded through a microphone connected via a digital±analogue converter into a computer. The effects of ingested biogenic amine precursors 5-hydroxytryptophan, L-DOPA and tryptophan were tested on three variables measurable from the sound traces: onset of the buzzing response after presentation of the pheromone stimulus, the duration of the buzzing event, and the maximal sound frequency produced during the buzzing event. Bees fed high doses of 5-hydroxytrytophan were found to react significantly more slowly and …


The Mayfly Newsletter, Peter M. Grant Jan 1999

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, January 1999 Jan 1999

Nebline, January 1999

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

This year I resolve...
Ten steps to good gardening
Lilac renewal
Protect trees from animal damage
Winter care of houseplants
Dispersal of blackbirds, crows and starlings from urban roosts
Environmental book review for kids
Beginning beekeeping training
Treasures in the trash
Tips to enhance the art of using snap-traps for mice
Attention land owners and renters
1999 integrated crop management winter programs
Grain stubble rental rates
Learn about soil fertility/crop nutrient needs in your spare time
Farm tractor, combine fires cost millions annually
Controlling eastern redcedar
Tractor safety tips (part 1)
Acreage reply
Rural living clinics scheduled
Use information at …


Diapause Termination Of Chilo Partellus (Swinhoe) And Chilo Orichalcociliellus Strand (Lepidoptera: Pyralidae), V. C. Ofomata, W. A. Ovekholt, R. I. Egwuatu Jan 1999

Diapause Termination Of Chilo Partellus (Swinhoe) And Chilo Orichalcociliellus Strand (Lepidoptera: Pyralidae), V. C. Ofomata, W. A. Ovekholt, R. I. Egwuatu

All Peer-Reviewed Publications

The intensity of diapause of field-collected diapausing larvae of Cliilo partcllus (Swinhoe) and Cliilo oriclmlcocilielltis Strand (Lepidoptera: Pyrnlidae) was compared in the laboratory at 28 ± 0.5°C under a photopcriod of 12:12 (L:D)h. Chilo partcllus terminated diapause faster than C. oriclmlcociliellus. Mean time to diapause termination was 9.7 days for C. parlellus and 14.4 days for C. oriclinlcociliellns. Male and female C. parlellns larvae terminated diapause and adults emerged at the same time, while significant differences were found in diapause termination and in emergence times between male and female C. orichnlcocilk'llits. © 1999 ICIPE.


Spatial Distribution And Habitat Characterization Of Anopheline Mosquito Larvae In Western Kenya, Noboru Minakawa, Clifford M. Mutero, John I. Githure, John C. Beier, Guiyun Yan Jan 1999

Spatial Distribution And Habitat Characterization Of Anopheline Mosquito Larvae In Western Kenya, Noboru Minakawa, Clifford M. Mutero, John I. Githure, John C. Beier, Guiyun Yan

All Peer-Reviewed Publications

Studies were conducted to characterize larval habitats of anopheline mosquitoes and to analyze spatial heterogeneity of mosquito species in the Suba District of western Kenya. A total of 128 aquatic habitats containing mosquito larvae were sampled, and 2,209 anopheline and 10,538 culicine larvae were collected. The habitats were characterized based on size, pH, distance to the nearest house and to the shore of Lake Victoria, coverage of canopy, surface debris, algae and emergent plants, turbidity, substrate, and habitat types. Microscopic identification of third and fourth-instar anopheline larvae did not yield any Anopheles funestus or other anophelines. A total of 829 …