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Queen Pheromone Production And Its Physiological Correlates In Fire Ant Queens (Hymenoptera: Formicidae) Treated With Fenoxycarb, Martin S. Obin, B. Michael Glancey, W. A. Banks, Robert K. Vander Meer

Entomology Papers from Other Sources

Biological assays were used to evaluate the effect of the insect growth regulator fenoxycarb (ethyl (2-p-phenoxyphenoxy) ethyl carbamate) on production of queen-derived dealation inhibitory pheromone and the queen recognition pheromone of Solenopsis invicta Buren. Treated virgin and mated queens weighed less and were less capable of inhibiting dealation by female alates than were nontreated controls. Virgin queens that gained weight during the experimental trials produced more dealation inhibitory pheromone and more queen recognition pheromone than virgin queens that lost weight. Treated virgin queens with fenoxycarb-induced ovary dysfunction inhibited de alation in proportionally fewer alates than treated virgin queens of similar …

Quantitative Analysis Of Temperature., Moisture., And Diet Factors Affecting Insect Development, David W. Hagstrum, George A. Milliken

Entomology Papers from Other Sources

Extensive published data on the developmental times of nine species of stored-product Coleoptera in relation to temperature, moisture, and diet were described by regression equations. At most temperatures, the order of relative influence of these factors on development was temperature > moisture > diet. However, moisture and diet influenced larval development more than temperature near the optimal temperature for development of each species. Egg, larval, and pupal stage durations at 27°C averaged 15, 66, and 19% of the total developmental time, respectively, at moistures above 12%, and 12, 72, and 15% of total developmental time at moistures below 12%. Similar percentages were …

Variation In Chromosome Length Among Five Biotypes Of The Greenbug (Homoptera: Aphididae), Z. B. Mayo, K. J. Starks, D. J. Banks, R. A. Veal

Department of Entomology: Faculty Publications

Chromosome-length measurements from five greenbug, Schizaphis graminum (Rondani), biotypes (B, C, E, F, and Maryland) were compared by discriminant analyses procedures. There were highly significant (P = 0.0001) differences in total lengths of chromosome sets among biotypes. In individual paired comparisons, where each biotype was compared with only one other biotype at a time, chromosome measurements correctly classified aphids to their respective biotype in 45-85% of the cases. Degree of correct classification was dependent on the two biotypes being compared and the discriminant function used in the analysis. Results indicate that there are two groups of biotypes that can be …

Effects Of Barley Yellow Dwarf Virus On The Biology Of The Bird Cherry-Oat Aphid, Rhopalosiphum Padi (L.), J. E. Araya, John E. Foster

Department of Entomology: Faculty Publications

Diverse parameters of the life cycle of Rhopalosiphum padi (L.), maintained on leaf sections of healthy or BYDV (PA V strain)·infected wheat and oat plants, were compared in the laboratory at 18 ± 1 C. The aphids reared on infected ",heat leaf sections had a shorter lifespan and adult Jife (P<= 0.05) than on uninfected wbeat (23.7 and 27.5 days for lifespan, and 17.9 and 21.4 days for adult life, respectively). Tbe BYDV-infection on wheat (cvs. 'Abe' and 'Caldwell') increased (P<= 0.05) the reproductive ability of the aphid from 73.9 to 78.1 nymphs per female (5.9 to 6.5 nymphs per day during the reproductive period). No significant dilTerences were detected when using oa15 (cvs. 'ClintIand 64' and 'Porter').

Natural Enemies Of Rice Leaf Folder Cnaphalocrocis Medinalis (Guenée) —A Critical Review, R. C. Joshi, E. P. Cadapan, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

A chronological review of the biological control agents of rice leaf folder, Cnaphafalocrocis medinalis Guenée, including the stage of host attacked in different countries, their activity and suggestions for future.

The rice leaf folder, Cnaphalocrocis medinalis Guenée, which was a pest of minor importance till the last decade, recently has assumed major importance in many rice ecosystem of Asia, the South Pacific Islands, Hawaii and Australia (Hirao, 1982). Increasingly frequent outbreaks of this pest (Table I) in recent years have been attributed to the introduction of modern rice technologies, namely: Continuous and overlapping cropping (Rajamma and Das, 1969); introduction of …

Assessment Of The Impact Of The European Corn Borer At Three Locations In South Dakota, David R. Raemisch

Electronic Theses and Dissertations

The European corn borer (Lepidoptera: Pyralidae) varies as an

economically significant pest in South Dakota from south to north. In

the northern part of the state the European corn borer (ECB) is limited

to one generation per year. In contrast, there are localized sites

along the Missouri River in southern South Dakota which usually

experience a substantial second brood population. Infestation by

either first or second brood ECB occurs at different stages in the

developmental sequence of the corn plant. As such, each brood must be

considered separately when assessing relationships between yield loss

and ECB larval cavities within the …

A Bibliography Of Varietal Resistance To The Rice Gall Midge, Orseolia Oryzae (Wood-Mason), P. K. Pathak, E. A. Heinrichs

Department of Entomology: Faculty Publications

This bibliography contains 330 published and unpublished references for the period 1881-1981. References are arranged alphabetically by author and are also classified by country and by subjects (mass rearing, screening, evaluation and utilization of resistant varieties, breeding for and inheritance of resistance, and biotype variation). Tables list resistant varieties identified, varietal sources used in breeding programs, varieties which have been released for cultivation by farmers and biotype classification.

The Yellowjackets Of America North Of Mexico, Roger D. Akre, Albert Greene, John F. Macdonald, Peter J. Landolt, Harry G. Davis

A

This volume is a compendium of data on the pestiferous vespines (hornets and yellowjackets) of the United States and Canada. Sections cover taxonomy, biology, economic and medical importance, and control. Illustrated keys are included for rapid identification of species, and a glossary defines many of the unusual terms used in the text.

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 …

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.

Larval Biology Of Some Utah Chrysididae, Bakary Vassery Ouayogode

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Biologies of eight chrysidid species were described. These wasps parasitized bees and wasps collected in trap nests set at several sites in two canyons near Logan, Utah. The completed nests were taken to the laboratory and the parasitized ones were kept for study of the development a l biology and behavior of both host and parasites.

The larval stages of Chrysura smaragdicolor, Chrysura sonorensis, Chrysis parkeri, Chrysis derivata, Chrysis coerulans, Cerotachrysis enhuycki, Trichrysis doriae and Hedychridium solierellae were studied. Omalus iridescens and Omalus purpuratus larvae were observed only in the fifth instar. The major …

The European Wasp : A New Threat To W.A, Department Of Agriculture, Western Australia

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

The European wasp was detected in Western australia for the first time in January and February 1977 in the metropolitan suburbs of Mosman Park, Cottesloe and Attadale.

So far it has only been found within an area of 8 km radius from Fremantle but the outer boundries of the infestation are still uncertain.

It is Department of agriculture policy to eradicate the European wasp, if possible, and to destroy all nests detected.

Interrelationships Of Hypera Postica (Gyllenhal) (Coleoptera: Curculionidae) And Bathyplectes Curculionis (Thomson) (Hymenoptera: Ichneumonidae) In Illinois With Emphasis On Host-Parasite Densities, Distribution Of Parasites Within Available Hosts And Estimates Of Percent Parasitism, Robert John Barney

Masters Theses

In an attempt to better understand the host-parasite relationship of the alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae) and Bathyplectes curculionis (Thomson) (Hymenoptera: Ichneumonidae), all life stages of the parasite were monitored throughout the spring. Sampling was conducted on a degree day basis from early March to late May in an alfalfa field in Mason County, Illinois.

Dissections of host alfalfa weevil larvae revealed 2nd and 3rd host instars were preferred larvae for oviposition. Peak parasite densities were found to precede peak total host larval densities, but coincided with peak densities of the preferred 2nd and 3rd instars. Larger host …

Eatonia No. 20, May 05, 1975, William L. Peters, Janice Peters

Eatonia

Eatonia was a newsletter established to facilitate communication among scientists working on a group of aquatic insects in the order Ephemeroptera, more commonly known as mayflies. The newsletter is named after Rev. Alfred E. Eaton who studied mayflies in England in the late 1800’s and is considered the “father” of the modern classification of mayflies.

Biology And Ecology Of False Wireworms In South Dakota (Coleoptera: Tenebrionidae), Carrol Otto Calkins

Electronic Theses and Dissertations

False wireworms were important pests of wheat on the Great Plains during the early 20th century. Until recently, they were of little importance; however, they are now occasionally appearing in damaging proportions. The purpose of studying the biological and ecological aspects of these insects in South Dakota was to understand the factors responsible for their demise and the circumstances that could affect the recurrence of damaging populations. The more common species of false wireworms found in South Dakota during this study were Eleodes suturalis (Say), E. opaca (Say), E. hispilabris (Say), E. tricostata (Say), E. extricata (Say), E. obsoleta (Say), …

Introduction Of Small Carpenter Bees Into California For Pollination 1. Release Of Pithitis Smaragdula, Howell V. Daly, George E. Bohart, Robbin W. Thorp

All PIRU Publications

Pithitis smaragdula (F.) is a bright green, small carpenter bee which is widespread in the oriental region and is known to pollinate economically important plants, especially legumes and cucurbits. About 300 bees imported from Ludhiana, India, were released 10 April 1969, at Davis, California. Subsequent collecting during the 1st season confirmed that one or more generations of the bees had been reared and that Trifolium repens L. was visited for pollen. Although the overwintering bees under observation died from unknown causes, and no living bees were found in 1970, it is possible that the bees survived elsewhere. Ecological factors believed …

The Evolution Of Parasitism Among Bees, George E. Bohart

Faculty Honor Lectures

Before discussing parasitic bees, I will present a rough outline of the biology of "ordinary" or non-parasitic bees. The superfamily Apoidea (bees) includes perhaps 25,000 or 30,000 species divided into nine families by recent authorities (Stephen, Bohart, Torchio, 1969) . A common biological thread holding this vast assemblage together is the provision by adults of pollen and nectar for their young. Only in the honey bees (the genus Apis which includes four species) are the larvae fed primarily on a different substance (a secretion of the pharyngeal glands) , and even this is derived from pollen and honey eaten by …

The Evolution Of Parasitism Among Bees, George E. Bohart

All PIRU Publications

No abstract provided.

The Biology And Ecology Of Trogoderma Glabrum (Herbst) In Stored Grains, Benjamin H. Kantack, Robert Staples

Nebraska Agricultural Experiment Station: Historical Research Bulletins

These investigations were undertaken to determine the distribution and importance of Trogoderma glabrum (Herbst) in stored grain in Nebraska, the ecological factors favoring population increase in stored wheat, corn, and sorghum, and the role T. glabrum might play in disseminating internally the Aspergillus molds commonly encountered in stored grain.

Spring Dispersal Of Some Leafhoppers And Aphids, A. G. Peterson, J. D. Bates, R. S. Saini

Journal of the Minnesota Academy of Science

Two species of leafhoppers and four species of cereal aphids appear to be transported to Minnesota each spring on strong winds from the south or southwest. The aster leafhopper, Macrosteles fascifrons (Stal); the English grain aphid, Macrosiphum avenae (Fabr.); the apple grain aphid, Rhopalosiphum fitchii (Sand.); and the greenbug, Schizaphis graminum (Rond.), usually arrive in Minnesota during late April or early May. Weather conditions favorable for northward movement of these insects consist of a high pressure area over the eastern states, a low pressure area over the western plains, and the resulting strong, persistent, south wind which is often called …

Migration Of The Army Cutworm, Chorizagrotis Auxiliaris (Lepidoptera: Noctuidae). I. Evidence For A Migration, Kenneth P. Pruess

Department of Entomology: Faculty Publications

Indirect evidence is presented to support the conclusion that the army cutworm, Chorizagrotis auxiliaris (Grote), migrates from the Great Plains to the Rocky Mountains during the spring and the same individuals return to the Plains in the fall. Spring activity occurs progressively later from east to west, the delay being greater than that caused by emergence but commensurate with flight potential of the moth. Flight is predominately from east to west and a constant turnover of moths occurs at all locations on the Plains. Seasonal occurrence in the mountains coincides with the period of inactivity on the Plains, during which …

Distribution Of Eggs And Leaf Mines Of Choristoneura Houstonana (Lepidoptera: Tortricidae) Attacking Eastern Red Cedar, Juniperus Virginiana, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

Cedar at Larned, Kansas, appeared to be more severely damaged in the upper and southern portions of the trees. There was a significant difference, in numbers of eggs and leaf mines, between the upper and lower halves and between compass directions; the upper and southern portions of the trees being most highly infested.

Choristoneura houstonana (Grote) is a pest of eastern red cedar, Juniperus virginiana, grown as a home landscape ornamental in shelter belts and windbreaks in western Kansas. It has been present for many years but the first reliable record in Kansas was in 1964, when it was sent …

Biology Of Duforea And Of Its Cleptoparasite, Neopasites (Hymenoptera: Apoidea), Phillip F. Torchio, Jerome G. Rozen Jr., George E. Bohart, Marjorie S. Favreau

All PIRU Publications

No abstract provided.

Determination Of Larval Instars Of The Rice Weevil Sitophilus Oryzae (L.) (Coleoptera: Curculionidae) In Wheat, A. E. O'Donnell

Journal of the Arkansas Academy of Science

No abstract provided.

Seasonal Population Fluctuations And Natural Control Of The Sweetclover Aphid, G. R. Manglitz, R. E. Hill

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Because the potential of the sweetclover aphid for damaging sweetclover is well documented, yet damage occurs only occasionally under field conditions, it would appear that natural factors which depress midsummer populations are important in preventing greater damage and worthy of detailed study. Thus, this study was begun early in 1959 to investigate the natural factors which generally keep populations of this aphid below levels causing economic damage.

A Review Of The Mites Of The Family Pseudocheylidae Oudemans, 1909 (Acarina, Prostigmata), Edward W. Baker, Warren T. Atyeo

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

Four genera and ten species are included; these are: Pseudocheylus biscalattts Ber1ese, 1888, P. americanus (Ewing), 1909, Stigmocheylus brevisetus Berlese, 1910, Anoplocheylus europaeus (Berlese), 1910, A. clavatus, n. sp., A. aegypticus, n. sp., A. protea (Womersley), 1935, Neocheylus natalensis Tragardh, 1906, N. nidcolus Lawrence, 1954, and N. collis, n. sp.

Observations On The Ethology Of Neotropical Anthophorine Bees (Hymenoptera: Apoidea), Charles D. Michener, Rudolf B. Lange

Mi

No abstract provided.

Influence Of Food Plants On Fecundity, Larval Development And Abundance Of The Tuber Flea Beetle In Nebraska, Roscoe E. Hill

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Laboratory and field tests were conducted to determine the effects of different food plants on fecundity, adult longevity and larval development of the tuber flea beetle, Epitrix tuberis Gentner. All food plants tested were those upon which the overwintered beetles commonly feed in the spring following emergence from hibernation.

Three New Muscoid Flies From Guam, George E. Bohart, J. Linsley Gressitt

All PIRU Publications

No abstract provided.

Active Projects In The United States And Canada Dealing With Grasshopper Research, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

The sixteenth annual meetings of the Rocky Mountain Conference of Entomologists were held at Cameron Pass, Colorado, August 17 to August 21, 1941. Some time was devoted during these meetings to a discussion of the research work that is being done at the present with grasshoppers. It was felt by those participating in the discussions that it would be highly desirable if certain data were available concerning grasshopper research projects that are being actively investigated at the present time in the United States and in Canada. The author if this paper was asked to assume the responsibility of formulating an …