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Leafhoppers (Cicadellidae) Associated With The Stone Fruit Orchards Of Northern Utah, Mervin W. Nielson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Virus diseases of stone fruit orchards have existed in Utah for more than a quarter of a century and are seriously diminishing the peach and cherry fruit production. Western X of peach, rusty mottle of cherry, wilt and decline of cherry, and little cherry constitute the most economically important stone fruit virus diseases in Utah. Many orchards, particularly in Davis County, have 50 to 83 percent of the trees infected with one or more of the yellow-red viroses. Surveys have shown that the diseases are spreading from 3 to 5 percent each year. It is believed that certain insects are …

Weather In Relation To The Yield Of Dry-Land Winter Wheat, Wajeeh R. Asfour

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Agriculture first developed in the Middle East where, probably about 15,000-10,000 B. C., the earliest wheat crop was reaped from cultivated wild grasses (Mann, 1946). In Biblical times the Middle East acted as the granary of the western world and led the world in cereal production. Now, however, the situation is different. The Middle East is one of the lowest yielding areas in the world. This failure of the agriculture of the Middle East may be due to both climatic and cultural reasons. Many students of the Middle East report that the climate has changed and that there has been …

Harvest Of Wild And Stocked Fish From The Logan River Drainage, Louis S. Pechacek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Logan River, one of Utah's better trout streams, has carried more than its share of the increased fishing pressure of the past few years. Careful management of the drainage by the U.S. Forest Service has kept the Logan River free of serious water fluctuations and relatively unpolluted by silt and wastes. The only noticeable fluctuations in the stream is the annual runoff cycle which usually reaches its peak in May. This alone has contributed greatly to the ability of the river to withstand the increased fishing pressure which it has done quite well. The increase in fishing pressure can …

Inheritance Of Resistance To Races Of Covered Smut, Awns, And Chaff Color In A Wheat Cross, Nazar Singh Dhesi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wheat is the most important cereal crop in the world. It is the principal staple food in Russia, United States, China, Canada, India and a number of other countries.

Covered smut is one of the most serious disease of wheat all over the world. According to Woolman and Humphrey (82) it was known from very early times and is referred to by Theoprastus and other early Greek Roman writers.

Inheritance Of Resistance To Six Races Of Bunt, To Awns And Kernel Color In A Wheat Cross, Marr D. Simons

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wheat is the most important cereal crop of the world, and one of the most serious diseases affecting it over much of its range is covered smut or bunt (57). The word "bunt", according to Heald (48), is a contraction of an old English term, "burnt ear", which fittingly describes the ravages of covered smut.

Man's first knowledge of this disease is lost in antiquity, but it was first recorded by early Greek writers (97). Gaines (39), writing in 1928, stated that since 1924 stinking smut had been the most destructive parasite of wheat in America, causing losses of as …

The Yield, Quality, And Nutrient Relationships Of Celery As Affected By Commercial Fertilizer, Rex L. Hurst

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Celery production has become an important factor in the economy of certain areas in Utah. In 1949 over 400 acres were harvested with an average yield of 800 crates per acre, the average return per crate being $1.80. this amounts to over half a million dollars. The crop serves as a valuable cash crop, creates a demand for hand labor, and serves as an important commercial fertilizer.

Hive And Field Mortality Of Honey Bees In Northern Utah Due To Effects Of Certain Ecological And Chemical Factors, Shih Chun Ma

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The honey bee is the most important pollinating insect in Utah, because various important crops such as fruits, legumes, and vegetable seed crops depend chiefly on it for pollination. In the past, honey bees have suffered repeated severe death losses through contact with arsenic and other agricultural chemicals. Recently the newer insecticides, such as DDT, chlordane, parathion, benzene hexachloride, lindane, toxaphene, and several kinds of miticides have further complicated the problem of bee survival. In addition, natural enemies such as predators and parasites and some unfavorable environmental conditions, including unfavorable temperature and humidity, wind, storm, and other changeable weather conditions, …

Harvest Of Wild And Stocked Fish From The Logan River Drainage, Louis S. Pechacek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Logan River heads in the southeastern corner of Franklin County, Idaho, and runs in a south and westerly direction. It enters the state of Utah through the northern boundary in the northeast corner of Cache County. The main stream is fed by two tributary streams which head in separate directions a few miles apart. The Franklin Basin branch is the main contributing tributary while the Beaver Creek branch is nearly as large.

The Bunt Problem In Relation To Winter Wheat Breeding, Delmar C. Tingey

Faculty Honor Lectures

Man is forever in search of new and better crops. He has for centuries been a persistant and fairly successful plant . breeder. Ancient Chinese are credited with breeding superior varieties of rice and hybrid flowers. Indians in America produced remarkable varieties of corn, and it was not until modern corn breeders developed "hybrid corn" that they produced superior yielding varieties.

The discovery of Mendel's work on hybridization 50 years ago pointed the way to almost limitless possibilities in plant improvement through breeding. Mendel discovered that if two related individuals were hybridized, it was possible in later generations to obtain …

The Sixty-Second Session Of The Iowa Academy Of Science And The Seventeenth Convention Of The Junior Academy Of Science Of Iowa, April 21 And 22, 1950, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Greenbug Control, Wm. M. Rogoff

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

Greenbug infestations in the State of South Dakota are unusual and have generally been broken by the interaction of natural factors such as predators, parasites, and weather. In the 1949 outbreak, the greenbug was seldom if ever the sole cause of damage in infested fields and in most cases spraying would not have been paid for by the remaining crop. The chemicals available for control are exceedingly dangerous to man and livestock, and their use should not be encouraged except where a clear and definite need has been shown to exist.

A New Elasmosaur From The Eagle Ford Shale Of Texas: The Elasmosaur And Its Environment, Ellis W. Shuler

Fondren Science Series

When Mr. Andy Anderson donated to Southern Methodist University the petrified skeleton of a great marine lizard found on his plantation near Cedar Hill, Texas, he said, "Write about it so common folks can understand." In view of this request, the description of this new and important specimen has been divided into two parts. Part I is a technical description of the skeleton written by S. P. Welles, Principal Museum Paleontologist, University of California (Berkeley), an authority on the elasmosaur group to which the specimen belongs. Mr. Welles completed his manuscript, Part I of Number 1 in the Fondren Science …

North Central South Dakota Farm Record Summary 1949 Seventh Annual Report, R. L. Berry

Agricultural Experiment Station Agricultural Economics Pamphlets (1941-1991)

This is the seventh annual report of the farm record study started by the Experiment Station in 1943. Farm record cooperators are located in two areas of the state; namely, the Southeastern and North Central Areas. A summary of the results of the Southeastern area are included in a separate pamphlet.

Notes On Microtine Rodents From The Brooks Range, Arctic Alaska, Robert L. Rausch, David H. Johnson

Harold W. Manter Laboratory of Parasitology: Faculty Publications

In connection with parasitological studies carried on during 1949 for the U.S. Public Health Service, the writer collected a considerable number of mammals from the northern edge of the "Endicott" section of the Brooks Range, in Arctic Alaska. The mammalian fauna of this region is poorly known, since apparently no previous collecting has been done here. About 200 microtine rodents were collected, mostly near Tolugak Lake (latitude 68° 24' N, longitude 151° 26' W), near the head of the Anaktuvuk River Valley. A few specimens were also taken at Umiat, on the Colville River, about 80 miles north of Tolugak …

How To Control Insects Harmful To Alfalfa Seed Production In South Dakota, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

In order that a grower of alfalfa seed may have the best chance of producing a. good seed yield, the harmful insects in the alfalfa field must be destroyed, while the beneficial pollinating insects should not be reduced but encouraged. The most harmful insects that affect the seed yield of alfalfa in South Dakota are the following: Grasshoppers of several species Crickets of several species Lygus and other plant bugs Clover, potato and other leaf hoppers Flea beetles of several species

Control Of Grasshoppers Through Chemical Sprays Or Dusts Or Baits, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

No abstract provided.

The Use Of Aircraft In European Corn Borer Control, Gerald B. Spawn

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

The European corn borer is at present considered to be the No. 1 insect pest of corn in South Dakota. It is now known (by specimen records) to be present in every county east of the Missouri river and in Lyman, Gregory and Tripp counties west of the Missouri River in South Dakota. During 1948 the corn borer did an estimated $2,500,000 worth of damage in our state~ In 1949 this damage figure was increased to $7,545,000.

Vegetative Key To Texas Desmanthus (Leguminosae) And Similar Genera, B. L. Turner

Field and Laboratory

There are several genera of Mimosoideae in Texas that resemble each other, especially when only the flowers are present. Probably the plants most frequently wrongly identified in the genus Desmanthus are Acacia hirta Nutt. and A. texensis T.&G. (A. cuspidata Sehl.), followed closely by the prostrate plants of Neptunia. Other similar Texas genera are Calliandra, Hoffmanseggia, Schrankia, and Mimosa strigillosa T.&G. The following vegetative key is designed as a quick aid to place species of this complex of plants in their proper places when flowers and/or fruit are absent.

Texas Species Of Desmanthus (Legurminosae), B. L. Turner

Field and Laboratory

The Texas species of Desmanthus (nomen conservandum), as treated in the present paper, total nine, one of which has two varieties. Six of these are found almost exclusively within the state.

The Species Of Matelea (Including Gonolobus) In North Central Texas (Asclepiadaceae), Lloyd H. Shinners

Field and Laboratory

MATELEA gonocarpa (Walter) Shinners, comb. nov. Vincetoxicum gonocarpos Walt., Fl. Carol. 104. 1788. (Emend. Gray and Perry.) Gonolobus gonocarpos (Walt.) Perry, Rhodora 40: 284. 1938.

The Distribution Of Wallengrenia Otho (Abbot & Smith) And Its Subspecies In The United States (Lepidoptera, Rhopalocera, Hesperiidae), H. A. Freeman

Field and Laboratory

No abstract provided.

Some Books About Botanical Explorers Of The Western Part Of The United States, S. W. Geiser

Field and Laboratory

No abstract provided.

The Distribution And Flower Preferences Of The Theclinae Of Texas (Lepidoptera, Rhopalocera, Lycaenidae), H. A. Freeman

Field and Laboratory

In 1944 I began work on the hairstreaks of North America. Since that year, nine new records for the United States, and one new species, were found in the vicinity of Pharr, Hidalgo County, Texas. While collecting over the State, I have found thirty-three species, five subspecies, and two forms, representing five genera of hairstreaks. One new Texas record is reported in this paper, Mitoura siva (Edw.) Most of the information contained here was obtained at first hand; but the fine collection of Stallings and Turner, at Caldwell, Kansas, was checked for Texas specimens.

The Texas Species Of Cacalia (Compositae), Lloyd H. Shinners

Field and Laboratory

No abstract provided.

Additional Records Of Plants Introduced Into Texas, V. L. Cory

Field and Laboratory

No abstract provided.

Gomphus Maxwelli, A New Species Of Dragonfly From Texas (Odonata, Gomphinae, Group Arigomphus), Alice Ferguson

Field and Laboratory

Four males of the species herein described as new, were collected by Dr. Richard E. Maxwell in Hardin County. Texas, May 11, 1940. Hardin County is in the Big Thicket area of southeastern Texas, where long and short leaf pines are common. The annual precipitation is c. 50 inches; springs, bogs and ponds are frequent; and the humidity is high.

A New Lesquerella (Cruciferae) From Northeastern Texas, V. L. Cory

Field and Laboratory

No abstract provided.

Variations In The Vertebrae And Pelvis Of Necturus, Joseph P. Harris Jr.

Field and Laboratory

In most specimens of Necturus, the nineteenth vertebra serves as the sacrum; the iliac processes of the pelvic girdle articulate with it. In a number of specimens, Vertebra XX or (less frequently) Vertebra XVIII serves as the sacrum. But not always do the two iliac processes join the same vertebra. The iliac process of the left side may join the XVIII, XIX, or XX vertebra. The converse may also occur.

Ranunculus Carolinianus Dc. Var. Villicaulis Shinners, Var. Nov., Lloyd H. Shinners

Field and Laboratory

No abstract provided.

Botanical Notes [Forestiera Pubescens Nutt. Var. Glabriflora Shinners, Var. Nov.; Hedyotis Crassifolia Raf. Var. Micrantha Shinners, Var. Nov.]., Lloyd H. Shinners

Field and Laboratory

No abstract provided.