Entomology Commons^™

The Pollination Requirements Of Insect-Pollinated Seed Crops, George E. Bohart

All PIRU Publications

No abstract provided.

Onion Pollination As Affected By Different Levels Of Pollinator Activity, George E. Bohart, William P. Nye, L. R. Hawthorn

All PIRU Publications

No abstract provided.

A Study Of Insects Attacking Pinus Flexilis James Cones In Cache National Forest, Thomas Evan Nebeker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Six species of insects were found attacking limber pine cones from July 26, 1968, through October 4, 1969, in Cache National Forest. The three species considered of major importance are: Conophthorus flexilis Hopkins, Dioryctria abietella (D. & S.), and D. sp. near or disclusa Heinrich. The three minor species encountered are; Bradysia sp., Trogoderma parabile Beal, and Asynapta keeni (Foote). In addition to the major and minor cone pests three parasites, Apanteles sp. prob. starki Mason, Elacherus sp., and Hypopteromalus percussor Girault were found associated with the cone pests.

C. flexilis, which completely destroys the cone, was ranked as …

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 …

Pollination Of Onion Seed Affected By Environmental Stresses, William P. Nye

All PIRU Publications

No abstract provided.

The Evolution Of Parasitism Among Bees, George E. Bohart

All PIRU Publications

No abstract provided.

Selective Breeding Of Honeybees For Alfalfa Pollen Collection: With Tests In High And Low Alfalfa Pollen Collection Regions, William P. Nye, O. Mackensen

All PIRU Publications

No abstract provided.

Commercial Production And Management Of Wild Bees--A New Entomological Industry, George E. Bohart

All PIRU Publications

No abstract provided.

The Influence Of Photoperiod On The Flight Activity Of Honeybees, J. A. Kefuss, William P. Nye

All PIRU Publications

No abstract provided.

Fire Weather : A Guide For Application Of Meteorological Information To Forest Fire Control Operations, Mark J. Schroeder, Charles C. Buck

The Bark Beetles, Fuels, and Fire Bibliography

Weather is never static. It is always dynamic. Its interpretation is an art. The art of applying complex information about weather to the equally complex task of wildland fire control cannot be acquired easily-especially not by the mere reading of a book. The environment is in control in wildland firefighting. Free-burning fires are literally nourished by weather elements, atmospheric components, and atmospheric motion. Outguessing mother nature in order to win control is an extremely difficult task. We need to soothe her with understanding. We have attempted to present information in such a way that your daily and seasonal awareness of …

The Development Of The Alfalfa Pollen-Collecting (Apc) Honey Bee, William P. Nye

All PIRU Publications

No abstract provided.

Should Beekeepers Keep Wild Bees For Pollination?, George E. Bohart

All PIRU Publications

No abstract provided.

The Ethology Of The Wasp, Pseudomasaris Edwardsii (Cresson), And A Description Of Its Immature Forms (Hymenoptera: Vespoidea, Masaridae), Phillip F. Torchio

All PIRU Publications

In a greenhouse, each nest of Pseudomasaris edwardsii (Cresson) was constructed of nectar-moistened soil, was solitary and was placed in open but concealed niches attached to a variety of substrates. The wasp anchored her egg by its posterior tip to the bottom of the cell, deposited a jellylike cylindrical provision composed of Phacelia pollen and nectar and constructed a cell cap. Soil carried to the nest was attached to the post genal surfaces of the female's head, and the pollen and nectar were transported in her honey stomach. Cells were clustered and attached to each other and to the substrate …

Let's Control Swarming, William P. Nye, George F. Knowlton

All PIRU Publications

No abstract provided.

A National Program Of Research For Bees And Other Pollinating Insects And Insects Affecting Man, U.S. Department Of Agriculture

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The United States Department of Agriculture and State Agricultural Experiment Stations are continuing comprehensive planning of research. This report is a part of this joint research planning and was prepared under recommendation 2 (page 204, paragraph 3) of the National Program of Research for Agriculture.

Selective Breeding Of Honeybees For Alfalfa Pollen Collection: Sixth Generation And Outcrosses, O. Mackensen, William P. Nye

All PIRU Publications

No abstract provided.

A New Species Of Dufourea From California *Hymenoptera: Halictidae), George E. Bohart

All PIRU Publications

No abstract provided.

Phoretic Behavior Of Four Species Of Alkali Bee Mites As Influenced By Season And Host Sex, Earle A. Cross, George E. Bohart

All PIRU Publications

No abstract provided.

The Biology And External Morphology Of Bees With A Synopsis Of The Genera Of North-Western America, W. P. Stephen, George E. Bohart, P. F. Torchio

All PIRU Publications

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 Vii, Philip H. Timberlake

Th

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 Vll (Including Index To Parts L To Vll), P. H. Timberlake

All PIRU Publications

In the preceding parts of this revision all the groups of the genus Perdita have been tabulated and the species described in more or less detail, with only a few omissions of previously known forms. In this supplementary part many more species are added and the omissions have been rectified. A bibliography of the genus, an index to all trivial names and corrigenda for preceding parts are added.

The Biology Of Euphytomima Nomiivora (Diptera: Sarcophagidae), A Parasite Of The Alkali Bee, Nomia Melanderi (Hymenoptera: Halictidae), Mohammad Javad Moradeshaghi, George E. Bohart

All PIRU Publications

No abstract provided.

Breeding Honey Bees To The Crop, William P. Nye

All PIRU Publications

No abstract provided.

Breeding Bees To The Crop, William P. Nye, O. Mackensen

All PIRU Publications

No abstract provided.

Alkali Bees--How To Manage Them For Alfalfa Pollination, George E. Bohart, George F. Knowlton

All PIRU Publications

No abstract provided.

The Nesting Habits And Immature Stages Of Andrena (Thysandrena) Candida Smith (Hymenoptera, Apoidea), Nabil N. Youssef, George E. Bohart

All PIRU Publications

No abstract provided.

Selective Breeding Of Honeybees For Alfalfa Pollen: Fifth Generation And Backcrosses, William P. Nye, Otto Mackensen

All PIRU Publications

Selection within lines for honeybees showing strong and weak tendencies toward collection of alfalfa pollen was continued through the fifth generation. In the line with a strong tendency (high line), the average percentage of pollen collectors collecting alfalfa pollen increased from 66% in the fourth generation to 85% in the fifth. In the line with the weak tendency (low line), the corresponding percentages were 8% and 18 %. Backcrosses of the two lines resulted in an intermediate mean. At Howell, Utah, where other pollen than alfalfa was scarce, the percentages were 99% and 53% for the high and low lines …

Factors Influencing Population Growth Of Tribolium Brevicornis In The Laboratory, Amin Gulla

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To determine the effect of the factors of the environment (temperature, relative humidity, and food) on the population growth of Tribolium brevicornis, different levels of temperatures from 17.5°C - 37.5°C were used. Effect of these IeveIs of temperatures was tested upon both pre-embryonic and post-embryonic development. No hatching occurred at 17.5°C, but the threshold temperature (the minimum temperature for the development) was just before 17.5°C. The optimum temperature for the embryonic development was found to be between 32.5°C - 35°C.

With the use of the saturated salt solution according to Buxton (1931) and Buxton and Melanby (1934), certain humidity …

Seed Size As Related To The Selection Of Alfalfas Resistant To The Seed Chalcid Bruchophagus Roddi, L. S. Rogers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Several studies have been made by others to try to find a better method of selecting alfalfa that is resistant to seed injury by the alfalfa seed chalcid. This study investigated the possibility of using seed size as a basis of selection for resistance.

Data in this thesis show that the stage of seed development when chalcid oviposited in the seeds did affect the size of seeds. Larger seeds were infested when alfalfa seed chalcid were introduced early in the development of seeds (five days after pollination), and the total number of seeds produced was slightly greater when chalcids were …

Protecting Honey Bees From Pesticides, U.S. Department Of Agriculture

An

Honey bees frequently are in danger of being killed when crops are treated with pesticides. Honey bees produce honey and beeswax valued at $55 million annually; but even more significant, the annual value of crops that require bee pollination exceeds $1 billion. For this reason, farmers and beekeepers should cooperate in protecting the bees from pesticides. Observance of precautions recommended in this publication can significantly reduce bee losses from pesticide poisoning.