Life Sciences Commons^™

Mirid-Bug Injury As A Factor In Declining Alfalfa-Seed Yields, Charles J. Sorenson

Faculty Honor Lectures

During the forty or more millions of years that insects have inhabited the earth they have developed remarkable adaptations and great powers of reproduction that have enabled them to spread over most of the world and occupy all of its habitable environments. In cultivating the land and in growing crops, man has disturbed the balance in nature which formerly prevailed. By doing this he has unwittingly assisted many insect species to multiply in unprecedented numbers by providing them with more delectable food in abundance and by transporting them from place to place and from continent to continent in his migrations …

A Discussion Of Ddt Through Questions And Answers, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

DDT received and is still receiving more publicity than any insecticide ever enjoyed in the history of man's war with insects. Newspapers, farm journals, cattle magazines, horticultural publications, women's magazines, the radio, motion pictures and every other conceivable means of advertising have lauded DDT to the skies. Much of this publicity was released v1hile DDT was still not available to the civilian but only to our Armed Forces. This avalanche of publicity created hundreds of thousands of potential buyers, many of whom began to clamor for the new marvelous insecticide. Press releases were then made from the State Experiment Stations …

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.

Synoptic Revision Of The United States Scarab Beetles Of The Subfamily Dynastinae, No. 3: Tribe Oryctini (Part), Lawrence Saylor

Entomology Papers from Other Sources

This paper is the third in the series covering the United States dynastine scarab beetles and includes the four genera differentiated in the following key:

1. Apex clypeus acute and definitely bidentate, the teeth often worn and nearly obsolete. Apex clypeus acute, either sharply or bluntly so, but never bidentate. Mandibles definitely tridentate externally, the basal tooth often worn and barely visible; thorax not more than two-thirds the length of the elytra; color rufous to rufocastaneous or rufopiceous = Ligyrus Burmeister

2. Mandibles bidentate externally (caution: examine from below and laterally to avoid counting the lacinia teeth as third teeth …

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

All PIRU Publications

No abstract provided.

Some Insect Food Of The Sage Sparrow, George F. Knowlton, William P. Nye

All PIRU Publications

No abstract provided.

Synoptic Revision Of The United States Scarab Beetles Of The Subfamily Dynastinae, No. 2: Tribe Oryctini (Part), Lawrence Saylor

Entomology Papers from Other Sources

This paper continues the series on United States dynastine scarab beetles and includes the three genera differentiated in the following key:

1. Apical margin of posterior tibia evenly truncate, never with angulations or teeth (lateral view); real apex of clypeus beyond (i.e., apical of) the apparent carinate apex; front male tibia frequently edentate. = Cheiroplatys Hope

2. Mandibles always large, always well exposed, always armed externally with teeth or else square in outline (cessus); apical margin of posterior tibia usually with 1 or 2 sharp angulations or 1 to 3 or 4 teeth. = Strategus Hope

3. Mandibles usually hidden …

Synoptic Revision Of The United States Scarab Beetles Of The Subfamily Dynastinae, No.1: Tribe Cyclocephalini, Lawrence W. Saylor

Entomology Papers from Other Sources

The important subfamily Dynastinae has for some time been relatively neglected, taxonomically speaking, and only in the past few years have new species been described or the larval characters of many species better characterized. In all collections I have seen,numerous United States species are grossly misidentified, and it is hoped that the present papers will help to rectify this condition.

Ritcher's paper (1944) is an excellent contribution to the immature stages of these insects. His title, however, Dynastinae of the United States, is very misleading, because this paper includes only a small proportion of the described United States species, and …

Effects Of Ddt And Other Insecticides On Several Species Of Potato Insects, Roscoe E. Hill

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Field and laboratory tests conducted in Nebraska showed DDT to be more effective than any other material yet tested against potato insect pests. Records were obtained on tuber flea beetles, Epitrix tuberis, potato psyllids, Paratrioza cockerelli, potato leafhoppers, Empoasca fabae, green peach aphids, Myzus persicae, Lygus elisus, Chlamydatus associatus, Aceratagallia uhleri and Macrosteles divisus. DDT remained effective against potato psyllids and potato leafhoppers under field conditions for a relatively long period of time. Populations of certain beneficial insects, such as Nabis spp., Orius spp. and lady beetles were found to be significantly reduced …

Cropduster Applying Ddt To Potato Field (Photo), Stephen D. Danielson

Department of Entomology: Faculty Publications

A large print found on top of a bookshelf in my office in the Plant Industry Building on East Campus, University of Nebraska–Lincoln. The office was previously occupied by Lloyd Anderson who was located at Scotts Bluff. Photo was taken in 1945 when the insecticide DDT dust was being applied to what appears to be a potato field.

Steve Danielson, January 16, 2018

The Mosquitoes Of Nebraska, H. Douglas Tate, Doris B. Gates

Nebraska Agricultural Experiment Station: Historical Research Bulletins

A survey of mosquitoes in Nebraska was conducted by the Nebraska Agricultural Experiment Station during 1942 and 1943. The object of the study was to determine the species, relative abundance, seasonal occurrence, and principal breeding places of mosquitoes in representative areas of the state. This report presents the results of the survey, and, in addition, some records and observations made in Nebraska by other workers during and previous to initiation of the project.

Second Report Of The Committee On Grasshopper Research Appointed By The American Association Of Economoic Entomologists. Part 1, Work Conducted By State Agencies Of The United States., Agricultural Experiment Station, South Dakota State College

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

This is the second report of the Committee on Grasshopper Research. The appointment of such a committee was first authorized at the San Francisco meeting of the American Association of Economic Entomologists in 1942 and was appointed by President Harry B. Weiss. Dr. P. N. Annand, who succeeded Dr. Weiss as president of the American Association of Economic Entomologists in 1943, requested that the entire personal of the committee appointed by Dr. Weiss continue to function for another year. The committee members agreed to do this.

External Parasites Of Poultry And Methods For Their Control, O. S. Bare

Nebraska Agricultural Experiment Station: Historical Circulars

External parasites cause severe losses to Nebraska poultry producers each year, and in many cases may be the deciding factor between success and failure. Under present circumstances, when maximum production is essential, prompt and effective measures must be taken to hold these saboteurs in check.

Controlling Stored-Grain Pests On Nebraska Farms, H. D. Tate, D. B. Whelan

Nebraska Agricultural Experiment Station: Historical Circulars

Warfare against destructive insects is not ended when grain has been placed in the bin. Here it is subject to attack by stored-grain pests which reduce its weight, feeding quality, and value for seed. These losses become especially serious when large stocks of grain are held for extended periods on farms and in warehouses. This circular describes methods available for handling and storage that will prevent or suppress infestations before they reach serious proportions.

Population Size And Longevity Of Males And Females In Drosophila, Kathleen M. Murphy

Bachelors’ Theses

The two ever present instincts of man are self-preservation and the propagation of the race. At the beginning of one’s life this urge to survive is wholly unconscious but later on this will to live Is supplimented within the individual as a definite conscious search for longevity. Awareness to this inherent and universal desire to live is evidenced by the sought after services of the physician or doctor; the presence of civil law with the law courts and many other protective establishments. This conscious awareness to the possibilities, no matter how slight, of extending or at least maintaining life has …

A Preliminary Survey Of Insects Visiting Goldenrod In Itasca Park, Alice Endicott

Journal of the Minnesota Academy of Science

No abstract provided.

First Report Of The Committee On Grasshopper Research Appointed By The American Association Of Economic Entomologists, Agricultural Experiment Station, South Dakota State College

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

This is the first report of the Committee on Grasshopper Research which was authorized at the San Francisco meeting of the American Association of Economic Entomologists in 1942.

Cockroach Control, H. D. Tate, E. C. Klostermeyer

Nebraska Agricultural Experiment Station: Historical Circulars

Cockroaches are among the most annoying and objectionable of household pests. They are a menace to sanitation, and their filthy habits result in the destruction and pollution of food. Not only may they become numerous in homes, but also in restaurants, hotels, grocery stores, dairies and other places where food is prepared or stored. Since they are active mostly at night, large numbers may develop in a building before they are known to exist.

Tillage Methods In Grasshopper Control, Gerald B. Spawn

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

The eyes of the world are turned toward the American farmer as the individual to whom they must look for the production of a plentiful supply of food for our fighting forces, our Allies and for the hungry millions as they are liberated from Nazi rule and devastation. Grasshoppers have done much to defeat the Great Plains farmers in their effort to produce this food. In the central part of our State many fields of corn, badly needed for feed, were planted during the past year from which not one bushel of grain was harvested. Numerous fields of flax, very …

Increases In Aphid Populations On Potato Plants Sprayed With Zinc Arsenite In Western Nebraska, Roscoe E. Hill, H. Douglas Tate

Department of Entomology: Faculty Publications

During the 1941 growing season, field observations in western Nebraska indicated that aphids, Myzus persicae (Sulz.), were becoming abundant in experimental potato plots that had been treated with zinc arsenite-lime sulfur spray for controlling potato flea beetles, Epitrix cucumeris (Harr.), and the potato psyllid, Paratrioza cockerelli (Sulc.). Detailed examinations of leaves showed that significantly greater populations were present on the sprayed than on the untreated plants. Evidence of slight increases also was noted on plants dusted with a barium fluosilicate and sulfur mixture.

Nebraska Cattle Grub Survey, Lewis T. Graham, H. Douglas Tate

Department of Entomology: Faculty Publications

The scarcity of data on the actual extent of cattle grub infestation in Nebraska became evident during the winter of 1942--43 when a control program was being organized. Although there were some cattlemen who were acutely aware of the losses occasioned by this pest, there were many others who had given the problem little thought or who believed that infestation resulted largely from the importation of feeder cattle. More detailed information was obviously desirable in order to present an accurate and convincing account of the problem to the cattle growers.

The Occurence Of The Potato Tuber Worm In Nebraska, H. Douglas Tate

Department of Entomology: Faculty Publications

A sample of potatoes showing tuber worm injury was submitted to the Entomology Department by a farmer of Elmwood (Cass County), Nebraska in September 1939. A few days later the farm was visited and a bin of about 125 bushels of potatoes was found to be heavily infested with the potato tuber worm. In compliance with instructions, the grower either used or destroyed the entire crop during the early part of the ensuing winter. Potato fields in the same vicinity were examined the following year, but no specimens or evidence of injury by this pest could be found. Apparently, this …

Cucumber Growing, W. R. Beattie

Ba

CUCUMBERS are included among the 20 important commercial truck crops that are shipped to the markets of the United States in large quantities. The area planted to cucumbers for table purposes in 1940 was 42,870 acres, and the crop produced was valued at $4,993,000, as reported by the Crop Reporting Board, Division of Agricultural Statistics, Agricultural Marketing Service. This acreage is exclusive of approximately 91,000 acres of cucumbers grown for pickles and also of the crop produced in greenhouses. This bulletin deals only with the production of table or slicing cucumbers as a field crop and those grown in coldframes, …

Tillage Methods In Grasshopper Control, Gerald B. Spawn

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

No abstract provided.

Notes On Some Feeding And Hibernation Habits Of California Polistes (Hymenoptera, Vespidae), George E. Bohart

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 …

A Synopsis Of The Genus Micralictoides (Hymenoptera, Apoidea), George E. Bohart

All PIRU Publications

No abstract provided.

Life History And Habits Of The Potato Flea Beetle In Western Nebraska, Roscoe E. Hill, H. Douglas Tate

Department of Entomology: Faculty Publications

In the potato-growing section of the North Platte Valley of western Nebraska, the difficulty of producing high quality potatoes frequently is greatly increased by the presence of destructive populations of the potato flea beetle Epitrix cucumeris Harris. Csually foliage injury by the adults is comparatively unimportant, but larval injury to tubers often greatly reduces the quality of the crop. Since prevention of tuber injury by the larvae has extended downward from the sides of the cages. Unless food was available in the form of plant growth within the cages, either green potato foliage or cut tubers were supplied as long …

Tillage Methods In Grasshopper Control, Gerald B. Spawn

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

In the light of the present world food situation, the control of insects assumes a role of major importance in the agricultural program. Various insects, among which grasshoppers are one of the most notorious, attack our growing groups, upon which we depend for food. Others attack grains in storage; plant and animal products of many kinds; clothing and articles of furniture; and our domestic livestock. Man himself is not immune from attack as is borne out of by the epidemics of louse transmitted typhus which are today growing in extent in certain parts of Europe. The losses sustained by mankind …

The Relation Of Temperature To The Embryonic And Nymphal Development Of The Differential Grasshopper Melanoplus Differentialis Thomas, Myron H. Swenk, Charles H. Bratt

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Temperature plays the major role in the regulation of the rate of embryonic development of the differential grasshopper (Melanoplus differentialis Thomas).