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Articles 361 - 390 of 1317
Full-Text Articles in Entomology
Observations Of The Visits Of Honey Bees And Bumble Bees To Bladder Senna (Colutea Arborescens Lam.), William P. Nye, George E. Bohart
Observations Of The Visits Of Honey Bees And Bumble Bees To Bladder Senna (Colutea Arborescens Lam.), William P. Nye, George E. Bohart
All PIRU Publications
No abstract provided.
Extra Supering And Shading As Factors In Honey Production In Northern Utah, William P. Nye
Extra Supering And Shading As Factors In Honey Production In Northern Utah, William P. Nye
All PIRU Publications
No abstract provided.
Observations On The Behavior Of Bees In A Controlled-Environment Room, William P. Nye
Observations On The Behavior Of Bees In A Controlled-Environment Room, William P. Nye
All PIRU Publications
A detailed description is given of a controlled-environment flight room for the study of bee behaviour both in and outside the colony. Experiments demonstrated the ability of a colony to collect pollen, sugar syrup and water in the room, and to rear brood normally, increasing its strength throughout It months in spring. The behaviour of bees collecting powdered pollen from a tray 30 ft. [10 m.l from the hive was influenced by the amount and distribution of light in the room.
Alfalfa Seed Production Studies, M. W. Pedersen, William P. Nye
Alfalfa Seed Production Studies, M. W. Pedersen, William P. Nye
All PIRU Publications
From a practical standpoint, the culture to use is the one that gives the greatest net return. The study indicates that planting alfalfa for seed production in 24-inch rows at a rate of 1.5 pounds of seed per acre and thinning in the fall of the year after planting is best. For example, a field planted in the spring of 1963 should be thinned in the fall of 1964. Cutting out approximately every other foot within the row seems advisable. While there appears to be considerable latitude in the extent of thinning, weed problems are encountered if the stand is …
How To Manage The Alfalfa Leaf-Cutting Bee (Megachile Rotundata Fabr.) For Alfalfa Pollination, George E. Bohart
How To Manage The Alfalfa Leaf-Cutting Bee (Megachile Rotundata Fabr.) For Alfalfa Pollination, George E. Bohart
All PIRU Publications
No abstract provided.
Introduction Of Foreign Pollinators, Prospects And Problems, George E. Bohart
Introduction Of Foreign Pollinators, Prospects And Problems, George E. Bohart
All PIRU Publications
No abstract provided.
A Revision Of The Larropsis Subgenus Ancistroma Fox (Hymenoptera: Sphecidae), R. M. Bohart, George E. Bohart
A Revision Of The Larropsis Subgenus Ancistroma Fox (Hymenoptera: Sphecidae), R. M. Bohart, George E. Bohart
All PIRU Publications
No abstract provided.
Nectar Sugar Concentration As A Measure Of Pollination Of Alfalfa (Medicago Sativa L.), William P. Nye, M. W. Pedersen
Nectar Sugar Concentration As A Measure Of Pollination Of Alfalfa (Medicago Sativa L.), William P. Nye, M. W. Pedersen
All PIRU Publications
The "visitation rate of honeybees on alfalfa may possibly be measured by determining the sugar concentration of nectar in the honey stomachs of foraging bees. This concentration is shown to be largely controlled by the relative humidity and the time available for nectar evaporation in the alfalfa blossom, which in turn depends on the rate of visitation by honeybees. An adjustment for relative humidity may be necessary in order to compare readings widely separated in time or location. Where conditions are relatively constant from day to day, it may be sufficient to measure the nectar sugar concentration and relative humidity …
Management Of Honeybee Colonies For Pollination In Cages, William P. Nye
Management Of Honeybee Colonies For Pollination In Cages, William P. Nye
All PIRU Publications
The use of bees for pollination is extending in various directions, and each extension brings with it new problems to be solved. Infields and orchards, the main problem may be to get the bees to visit all the flowers. In a small plot, this can be ensured by enclosing the plot and a hive of bees in a cage, but special steps are then needed to ensure the well-being of the bees. In this article Mr. Nye, who is on the staff of the Entomology Research Division of the United States Department of Agriculture, describes the colony management necessary. The …
The Bionomics Of A Primitively Social Bee, Lasioglossum Inconspicuum, Charles D. Michener, Alvaro Wille
The Bionomics Of A Primitively Social Bee, Lasioglossum Inconspicuum, Charles D. Michener, Alvaro Wille
Mi
No abstract provided.
Here's A Way To Increase Seed Crop, George E. Bohart, George F. Knowlton
Here's A Way To Increase Seed Crop, George E. Bohart, George F. Knowlton
All PIRU Publications
No abstract provided.
Research On Legume Pollination, George E. Bohart
Research On Legume Pollination, George E. Bohart
All PIRU Publications
No abstract provided.
Pollination Of Seed Crops By Insects (In Seeds. The Yearbook Of Agriculture), George E. Bohart, Frank E. Todd
Pollination Of Seed Crops By Insects (In Seeds. The Yearbook Of Agriculture), George E. Bohart, Frank E. Todd
All PIRU Publications
No abstract provided.
Influence Of Logging On Douglas Fir Beetle Populations, R R. Lejeune, L H. Mcmullen, M D. Atkins
Influence Of Logging On Douglas Fir Beetle Populations, R R. Lejeune, L H. Mcmullen, M D. Atkins
The Bark Beetles, Fuels, and Fire Bibliography
All species of bark beetles of economic importance prefer to attack freshly-killed host material. Logging slash, wind-throw, and fire-killed timber provide ideal breeding grounds for bark beetles. A few species, mostly in the Dendroctonus group, are able to kill living trees. When beetles in the group, raised in preferred host material, cannot find any or enough freshly-killed trees, logs, or slash to enter, they may attack living trees. In the interior of British Columbia, infestations of the Douglas fir beetle can often be traced to logging disturbance.
Carrot Seed Production As Affected By Insect Pollination, Hawthorn L. R., George E. Bohart, E. H. Toole, William P. Nye, M. D. Levin
Carrot Seed Production As Affected By Insect Pollination, Hawthorn L. R., George E. Bohart, E. H. Toole, William P. Nye, M. D. Levin
All PIRU Publications
No abstract provided.
Fluctuations Of The Clover Seed Chalcid, Bruchophagus Gibbus (Boh.), And Other Alfalfa Insect Populations In Cache Valley, Utah During The Summer Of 1958, Keith C. Tilley
Fluctuations Of The Clover Seed Chalcid, Bruchophagus Gibbus (Boh.), And Other Alfalfa Insect Populations In Cache Valley, Utah During The Summer Of 1958, Keith C. Tilley
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The clover seed chalcid Bruchophagus gibbus (Boham) as it is presently classified, was originally described by Howard, in 1879 as Eurytoma funebris Howard (Comstock 1880). Kolobova (1950) reported different races of chalcid on clover and alfalfa in Russia. Studies are presently being conducted in the United States to see if these are applicable to our fauna, Burks (1960).
Insect Pollinators Of Carrots In Utah, George E. Bohart, William P. Nye
Insect Pollinators Of Carrots In Utah, George E. Bohart, William P. Nye
All PIRU Publications
IN THE course of observation at Logan, Utah, on the occurrence and pollinating activities of insects on carrots grown for seed, 334 species representing 71 families, were collected. Most numerous in species were the hymenopterous families and superfamilies Sphecidae, Apoidea, Psammocharidae, Vespidae, and Ichneumonidae, and the dipterous families Syrphidae, Tachinidae, Bombyliidae, Stratiomyidae, and Sarcophagidae. Most numerous in individuals were the dipterous families Syrphidae, Ceratopogonidae, Chloropidae, and Piophilidae and the coleopterous family Coccinellidae. Families and superfamilies represented by the most efficient pollinators were Apoidea, Sphecidae, Syrphidae, and Stratiomyidae. Abundance times efficiency was used as a pollination index for each species. On …
The Biology Of Heterostylum Rubustum (Diptera: Bombyliidae), A Parasite Of The Alkali Bee, George E. Bohart, W. P. Stephen, R. K. Eppley
The Biology Of Heterostylum Rubustum (Diptera: Bombyliidae), A Parasite Of The Alkali Bee, George E. Bohart, W. P. Stephen, R. K. Eppley
All PIRU Publications
No abstract provided.
Managing Alkali Bees For Alfalfa Pollination, George E. Bohart, George F. Knowlton
Managing Alkali Bees For Alfalfa Pollination, George E. Bohart, George F. Knowlton
All PIRU Publications
No abstract provided.
The Biology Of Nomia (Epinomia) Triangulifera With Comparative Notes On Other Species Of Nomia, Earle A. Cross, George E. Bohart
The Biology Of Nomia (Epinomia) Triangulifera With Comparative Notes On Other Species Of Nomia, Earle A. Cross, George E. Bohart
All PIRU Publications
No abstract provided.
Distance From The Apiary As A Factor In Alfalfa Pollination, M. D. Levin, George E. Bohart, William P. Nye
Distance From The Apiary As A Factor In Alfalfa Pollination, M. D. Levin, George E. Bohart, William P. Nye
All PIRU Publications
Experiments conducted in northern Utah indicated that the distribution of honey bees (Apis mellifera L.) on an alfalfa field is modified by various influences besides distance from the colonies. Because of these other factors, generalizations concerning the effect of distance from colonies on the distribution of foraging honey bees cannot be made on the basis of experiments herein reported. A slight negative relationship between bee populations and distance from colonies in alfalfa fields was found in some of the experiments reported. In two fields where the distance was less than 600 feet, horizontal stratification of the field population …
Descriptions, Biology, And Notes On The Identification Of Some Trogoderma Larvae, R. S. Beal Jr.
Descriptions, Biology, And Notes On The Identification Of Some Trogoderma Larvae, R. S. Beal Jr.
Ba
For several years members of the dermestid beetle genus Trogoderma have attracted widespread attention, particularly since T. granariurn Everts, the khapra beetle, became established as an introduced pest in Arizona, California, Mexico, and New Mexico. This species has been the object of a control program to remove it as a hazard to stored grain and to prevent its spread to parts of the country where it is not known to occur. Species of Trogoderma other than the khapra beetle may also build up to damaging numbers in stored products. Information has been obtained on these species, as well as on …
Cultural Practices For Alfalfa Seed Production, M. W. Pedersen, George E. Bohart, M. D. Levin, William P. Nye, S. A. Taylor, J. L. Haddock
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
A Modified Pollen Trap For Honey Bee Hives, William P. Nye
All PIRU Publications
No abstract provided.
Observations On The Behavior Of Brasilian Halictid Bees, Iii, Charles D. Michener, Rudolf B. Lange
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
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
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 …
Alfalfa Pollinators With Special Reference To Species Other Than Honey Bees, George E. Bohart
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
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 …
The Effect Of Prior Location On Alfalfa Foraging By Honey Bees, M. D. Levin, George E. Bohart
The Effect Of Prior Location On Alfalfa Foraging By Honey Bees, M. D. Levin, George E. Bohart
All PIRU Publications
No abstract provided.