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Articles 10291 - 10320 of 11462

Full-Text Articles in Entomology

Ticks Affecting Animals In Australia, J Shilkin Jan 1960

Ticks Affecting Animals In Australia, J Shilkin

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

WHILE there are many external parasites affecting animals in Australia, information in regard to their geographical distribution and incidence is far from complete.

However, there is little doubt that the ticks, and in particular, the cattle tick, are the most important of these parasites in Australia.

We are fortunate that many species are not present in this country, as some of them are carriers of serious diseases of both man and animals.


Rice Stem Borers At The Kimberley Research Station, L E. Koch Jan 1960

Rice Stem Borers At The Kimberley Research Station, L E. Koch

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

STEM boring caterpillars have severely damaged rice crops at the Kimberley Research Station, near Wyndham, and studies have been made on the biology, abundance, and control of these insects.


Control Of The Red-Legged Earth Mite And Lucerne Flea : Treatment Of Seed With Systemic Insecticides, M M H Wallace Jan 1960

Control Of The Red-Legged Earth Mite And Lucerne Flea : Treatment Of Seed With Systemic Insecticides, M M H Wallace

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

THE red-legged earth mite, Halotydeus destructor (Tuck.), and the lucerne flea, Sminthurus viridis (L.), are at present controlled effectively, cheaply and safely by a combined DDT/malathion spray (Jenkins, 1956, 1957) and this continues to be the general recommendation for farmers.

However, this combination has some disadvantages. The DDT in the spray ensures some residual control of the earth mite but has the unfortunate property of toxicity to the bdellid mites which are useful predators of the lucerne flea.

The malathion in the spray assists the DDT to control the earth mite and provides a good, quick kill of the lucerne …


Observations On The Biology Of Schistocerca Venusta, David Allyn King Jan 1960

Observations On The Biology Of Schistocerca Venusta, David Allyn King

University of the Pacific Theses and Dissertations

Statement Qf the problem. The green valley grasshopper, Schistoceroa venusta Scudder, is one of the most common grasshoppers to be found in the San Joaquin Valley and environs. Despite the fact that the insect is commonplace, very little work has been done on its biology. It was the purpose of this study, therefore, to learn by field and laboratory observations of the life cycle and habits of Schistoceroa venusta.


Effects Of Moisture On The Clover Root Borer And Red Clover Yields, K. P. Pruess, C. R. Weaver Dec 1959

Effects Of Moisture On The Clover Root Borer And Red Clover Yields, K. P. Pruess, C. R. Weaver

Department of Entomology: Faculty Publications

Rainfall and populations of the clover root borer, Hylastinus obscurus (Marsham), were artificially controlled in pots of red clover grown under shelters in the field. Populations of clover root borer were higher under dry conditions. Although yield losses were high in borer-infested pots, yield reductions were no greater under dry than under wet conditions.


Insect Pest And Their Control - Potato Moth Control, J. A. Button, L. E. Koch Nov 1959

Insect Pest And Their Control - Potato Moth Control, J. A. Button, L. E. Koch

Journal of the Department of Agriculture, Western Australia, Series 3

THE potato moth, Gnorimoschema operculella Zell., is almost world-wide in its distribution and can cause considerable damage to both potato crops and stored potatoes. The adult insect is a small inconspicuous, grey moth. The caterpillars cause the damage and they are, when fully grown, about half an inch long and pale greenish white in colour. They eat into the leaf and feed between the leaf surfaces and even work down the leaf stalks into the stems. Tubers may be damaged in the ground by caterpillars entering through cracks in the soil.


Bionomics Of Culex Tarsalis Coquillett In Utah County, Stanley K. Taylor Jul 1959

Bionomics Of Culex Tarsalis Coquillett In Utah County, Stanley K. Taylor

Theses and Dissertations

This paper presents information concerning the bionomics of Culex tarsalis Coquillett in Utah County. Observations indicate that rock piles and talus slides are typical hibernation sites. The spring emergence from hibernation occurred between 28 March and 7 April 1959. Larvae breed in a great variety of habitats, including street-gutters, animal tracks, marshes and waste water from irrigation systems. The peak population density for both larvae and adults occurred during the first week in August. Charts, graphs, drawings and photographs are used in the presentation of data.


Cultural Practices For Alfalfa Seed Production, M. W. Pedersen, George E. Bohart, M. D. Levin, William P. Nye, S. A. Taylor, J. L. Haddock Mar 1959

Cultural Practices For Alfalfa Seed Production, M. W. Pedersen, George E. Bohart, M. D. Levin, William P. Nye, S. A. Taylor, J. L. Haddock

All PIRU Publications

No abstract provided.


A Modified Pollen Trap For Honey Bee Hives, William P. Nye Jan 1959

A Modified Pollen Trap For Honey Bee Hives, William P. Nye

All PIRU Publications

No abstract provided.


An Iron Fulgurite From Nebraska, C. M. Riley Jan 1959

An Iron Fulgurite From Nebraska, C. M. Riley

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

From the time of the ancients man has been impressed with the force of lightning and its effect on the rocks at the surface of the earth. It was Saussure in 1786 who first wrote a scientific account of a true fulgurite, and a wealth of literature has been written about the subject since this time. Many unusual fulgurites have been described, some of which may not truly be the result of lightning. The iron fulgurite is a strange conical object about 3 inches high composed mainly of tiny spheres and filaments of metallic iron intermixed with a small amount …


Harry Scott Smith, Biological Control: Riverside (1883-1957): University Of California: In Memoriam, 1959, A. M. Boyce, H. Compere, R. Van Den Bosch Jan 1959

Harry Scott Smith, Biological Control: Riverside (1883-1957): University Of California: In Memoriam, 1959, A. M. Boyce, H. Compere, R. Van Den Bosch

Department of Entomology: Faculty Publications

Harry Smith was born at Aurora, Nebraska, November 29, 1883. He was brought up as a farm boy and experienced all the rigors of life on a prairie farm in the latter part of the nineteenth century. The hours of work in the fields, from dawn to dusk, made an indelible impression. Admittedly, he escaped from “haying” and “tending hogs” by enrolling in the State University at Lincoln, where he worked his way by waiting on tables at fifteen cents an hour. There he was granted his A.B. degree in 1907 and his M.S. degree in 1908. Insects became his …


Effect Of Host Condition On The Clover Root Borer, K. P. Pruess Dec 1958

Effect Of Host Condition On The Clover Root Borer, K. P. Pruess

Department of Entomology: Faculty Publications

Oviposition by the clover root borer, Hylastinus obscurus (Marsham), is completed earlier in weakened than in vigorous plants, but development is more rapid in vigorous or lightly infested roots. High populations occurring early in the season result in plant mortality with subsequently slowed borer development.


Observations On The Behavior Of Brasilian Halictid Bees, Iii, Charles D. Michener, Rudolf B. Lange Nov 1958

Observations On The Behavior Of Brasilian Halictid Bees, Iii, Charles D. Michener, Rudolf B. Lange

Mi

No abstract provided.


Observations On The Ethology Of Neotropical Anthophorine Bees (Hymenoptera: Apoidea), Charles D. Michener, Rudolf B. Lange Nov 1958

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

Mi

No abstract provided.


A Revisional Study Of The Bees Of The Genus Perdita F. Smith, With Special Reference To The Fauna Of The Pacific Coast (Hymenoptera, Apoidea) Part Iii, P. H. Timberlake Oct 1958

A Revisional Study Of The Bees Of The Genus Perdita F. Smith, With Special Reference To The Fauna Of The Pacific Coast (Hymenoptera, Apoidea) Part Iii, P. H. Timberlake

All PIRU Publications

In the two preceding parts of this revision those species of Perdita have been treated that belong to the subgenera Xerophasma, Pseudomacrotera, Macrotera, Cockerellula, Macroteropsis, Macroterella, Heteroperdita, Glossoperdita, Hesperoperdita, Epimacrotera, Cockerellia, Procockerellia, Pentaperdita, Xeromacrotera, Callomacrotera, Hexaperdita, Perditella, Alloperdita, and Pygoperdita. The many species now remaining will be referred to the typical subgenus, although divided into numerous groups. In Part III the systematics of those sections of the typical subgenus designated as the zonalis and halictoides groups will be considered, together with …


The External Morphology Of Pseudopanurgus Aethiops (Cresson), Glenn A. Hackwell Jul 1958

The External Morphology Of Pseudopanurgus Aethiops (Cresson), Glenn A. Hackwell

Theses and Dissertations

In comparing the head of Pseudopanurgus with Anthophora and Apis, the general outline appears rather similar, the most significant variation being found on the posterior surface. Extending ventrally from the postoccipital suture to the dorsal wall of the proboscidial fossa is a suture known as the fused hypostomal suture. The hypostomal area is rather small and makes up only a small portion of the dorsal and lateral walls of the proboscidial fossa, the remainder being formed by the postgena. If this is correct, the hypostomal carinae (a term with which the author does not agree) are actually located on the …


Natural And Experimental Infections Of Thelazia Californiensis Price (1930, Nematoda: Thelaziidae) With Descriptions Of The Adult And Larval Parasites, Howard S. Burnett Jun 1958

Natural And Experimental Infections Of Thelazia Californiensis Price (1930, Nematoda: Thelaziidae) With Descriptions Of The Adult And Larval Parasites, Howard S. Burnett

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this work was to determine the extent and effects of infestation of the eye worm of mammals, Thelazia californiensis, and to elucidate through experimentation or observation the mode of transmission.

A survey of literature revealed that thelaziasie (infestation by Thelazia species) may cause serious pathological changes in the eye and its adnexa, sometimes resulting in blindness. It was found that reports of thelaziasis in the United States were (with two exceptions) of cases in California. It was further found that T. californiensis has been reported in a wider variety of host than has any of other …


Alfalfa Pollinators With Special Reference To Species Other Than Honey Bees, George E. Bohart Jan 1958

Alfalfa Pollinators With Special Reference To Species Other Than Honey Bees, George E. Bohart

All PIRU Publications

No abstract provided.


The Effects Of Woodpeckers On Populations Of The Engelmann Spruce Beetle, F B. Knight Jan 1958

The Effects Of Woodpeckers On Populations Of The Engelmann Spruce Beetle, F B. Knight

The Bark Beetles, Fuels, and Fire Bibliography

Woodpeckers have been recognized for many years as a major factor in the natural reduction of Engelmann spruce beetle populations. A means of assessing their value has been developed. Five classifications of woodpecker feeding based on woodpecker work on 225 trees were studies. An analysis of populations measurements showed a correlation between beetle survival and the woodpecker classification and the intensity of infestation in each tree. A heavy woodpecker classification resulted n very little survival at all intensities of infestation. Survival increased both with an increase in intensity of infestation and a lower woodpecker classification. The average reduction in populations …


Tests With Poison Baits Against Cockroaches, C. S. Lofgren, G. S. Burden Jan 1958

Tests With Poison Baits Against Cockroaches, C. S. Lofgren, G. S. Burden

Entomology Papers from Other Sources

Poison baits consisting of some food material with a toxicant such as phosphorus or boric acid have been used for many years for controlling the cockroaches (Mallis 1954, pp. 181-5). Recently Keller et al. (1956) reported that a bait consisting of cornmeal (73 percent), Coca-Cola syrup (25 percent), and Dipterex (2 percent) controlled Periplaneta spp. in homes for 30-60 days.


Control Of Hog Lice And Mange, Robert Roselle Jan 1958

Control Of Hog Lice And Mange, Robert Roselle

Department of Entomology: Faculty Publications

The hog louse (Haematopinus suis) is the largest species of louse found on domestic animals. It may attain a length of one-quarter of an inch. The body is oval, and the legs terminate in large, dark claws well adapted to cling to hairs. Hog lice are bluish-gray in color. They are found only on hG>gs except in very unusual cases. The eggs or "nits" are glued to the hairs and hatch in 12 to 20 days. Young lice mature in 10 to 12 days. The average life cycle is about 35 days. Lice suck blood from the host, and …


The Effect Of Prior Location On Alfalfa Foraging By Honey Bees, M. D. Levin, George E. Bohart Oct 1957

The Effect Of Prior Location On Alfalfa Foraging By Honey Bees, M. D. Levin, George E. Bohart

All PIRU Publications

No abstract provided.


Further Tests Of Band Placement Of Insecticides For Clover Root Borer Control, C. R. Weaver, K. P. Pruess, J. L. Parsons Jun 1957

Further Tests Of Band Placement Of Insecticides For Clover Root Borer Control, C. R. Weaver, K. P. Pruess, J. L. Parsons

Department of Entomology: Faculty Publications

Weaver & Haynes (1955) described a method of placement of insecticides in bands under red clover seed that achieved control of the clover root borer, Hylastinus obscurus (Marsh.). Band placement was as effective at 0.75 pound of toxicant per acre as broadcast treatments at 1 pound or more as reported by Gyrisco et al. (1954) and App & Everly (1950). Since the 1951–53 tests were carried out in one location on small plots and applied by a farm crew experienced in experimental procedures, it was desired to test the band placement method more extensively. Tests in 1954–56 were conducted at …


A Morphological Study Of Some North American Sitona (Coleoptera: Curculionidae), George J. Kidd Jun 1957

A Morphological Study Of Some North American Sitona (Coleoptera: Curculionidae), George J. Kidd

Theses and Dissertations

This study was undertaken to identify, if possible, some morphological characteristics of the U. S. Sitona species that would help simplify the classification of this difficult group. Because of extreme difficulty in obtaining positively identified specimens of all species reported, the scope was limited to eight identified species and one unidentified series. External structures studied include mouth parts, appendages, eyes, wings, and genitalia. The spermathecae were the only internal structures analyzed. Mandibular profiles were compared throughout the species represented and variations were noted. Labia and maxillae were observed but no distinctive differences were noticed. Antennae were found to be quite …


Bees. The Nursery, George E. Bohart, William P. Nye Feb 1957

Bees. The Nursery, George E. Bohart, William P. Nye

All PIRU Publications

No abstract provided.


A Taxonomic Study Of The Families Of Utah Coleoptera Excluding Rhynchophora, T. Blaine Moore Jan 1957

A Taxonomic Study Of The Families Of Utah Coleoptera Excluding Rhynchophora, T. Blaine Moore

Theses and Dissertations

During the years 1950-51 work was begun on a study of the Coleoptera by the author. In 1955, due to the lack of a workable set of keys to the Coleoptera of Utah, a study was undertaken to find a way to more easily classify the beetles of the state to their respective families. The collection of Brigham Young University was used as the basis for determining the families of beetles actually found in Utah. Then a thorough search of the literature was made to find positive records of Utah families not represented in that collection. It was found that …


Case Of Collecting Tick Amblyomma Lepidum Dönitz, 1909, In Azerbaijan, M. V. Pospelova-Shtrom, N. S. Abusalimov Jan 1957

Case Of Collecting Tick Amblyomma Lepidum Dönitz, 1909, In Azerbaijan, M. V. Pospelova-Shtrom, N. S. Abusalimov

United States Naval Medical Research Unit 3: Publications

First paragraph:

On 18 May 1954, (a specimen of) Burhinus oedicnemus (L.) was killed in the Lenkoransky region of Azerbaijan S.S.R.; on its head a male Amblyomma lepidum Dönitz, 1909, was found. Morphological characters of this tick, size and shape of body, characteristic light and dark ornamentation of dorsal shield, punctation, shape, and two colors of festoons, size and shape of cervical and lateral grooves, hypostome, peritreme, projection on coxae, and spherical orbited eyes correspond to those in the description of A. lepidum, given in Robinson monograph. Only on four anterior festoons a small light spot is found (in …


Medial Pleistocene Fossil Vertebrate Localities In Nebraska, C. Bertrand Schultz, Lloyd G. Tanner Jan 1957

Medial Pleistocene Fossil Vertebrate Localities In Nebraska, C. Bertrand Schultz, Lloyd G. Tanner

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

The accurate geologic dating of Pleistocene vertebrate localities which occur outside the glaciated regions has always been difficult. Several new fossil localities in Nebraska now provide data for a better understanding of the paleoecology and faunal evidence of the medial Pleistocene of the Great Plains region.

A fossil quarry, containing the remains of both vertebrates and invertebrates, has been discovered in south-central Nebraska (11/2 miles south and west of Angus in Nuckolls County). The fossils are preserved in Sappa silts in a lime concentration zone (C horizon) of a Yarmouth paleosol. The calcium carbonate appears to have been responsible for …


Lone Star Tick, Amblyomma Americanum, J. L. Lancaster Jan 1957

Lone Star Tick, Amblyomma Americanum, J. L. Lancaster

Journal of the Arkansas Academy of Science

No abstract provided.


Bees. Foraging For Nectar And Pollen, George E. Bohart, William P. Nye Oct 1956

Bees. Foraging For Nectar And Pollen, George E. Bohart, William P. Nye

All PIRU Publications

No abstract provided.