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Showing 1 to 11 of 11 for “"Andrena"”.
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A Phenetic Analysis of New World Bees of Five Subgenera of the Genus Andrena (Hymenoptera: Apoidea)
Made available in DSpace on 2014-12-11T18:05:45Z (GMT). No. of bitstreams: 1 7412120.pdf: 6731376 bytes, checksum: 66d67789c8055b63456737660296c55f (MD5) Previous issue date: 1973
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An Assessment of Non-Apis Bees as Fruit and Vegetable Crop Pollinators in Southwest Virginia
… bee diversity; and non-Apis bees in the genera Andrena, Bombus, and Osmia were as constant as honey bees when foraging on apple. Non-Apis, primarily native, bees made up between 68% (in caneberries) and 83% (in cucurbits) of bees observed visiting crop flowers. While 37–59 species visited crop …
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Patterns of Resource Utilization by Spring Bees Visiting Salix With Emphasis on Use of Pollen by Bees in the Genus Andrena (Hymenoptera: Apoidea) (Competition, Resource Partitioning)
Made available in DSpace on 2014-12-16T05:57:04Z (GMT). No. of bitstreams: 1 8511645.pdf: 6457485 bytes, checksum: 19a929f537af2cef7833289a3aa4bd26 (MD5) Previous issue date: 1985
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Phenological responses of British orchids and their pollinators to climate change: an assessment using herbarium and museum collections
… important pollinator models: the solitary bee Andrena nigroaenea the digger wasp Argogorytes mystaceus, and the moth Euclidia glyphica, museum specimens and field observation gave statistically identical results, confirming the value of museum collections as a source of long-term phenological …
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Toxicity assessment of pesticides and biopesticides on wild and managed bees (Hymenoptera, Apoidea), and richness evaluation in mediterranean and tropical agroecosystems
… reduced survival of ground-nesting wild bees of Andrena and Eucera species, and altered the locomotor behavior of managed bees. Synthetic insecticides used to protect greenhouse tomato plants reduced the survival and caused changes in feeding behavior, and midgut alterations in B. terrestris. …
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BEES IN THE WOODS: SPRING ORCHARD POLLINATORS USE FOREST CANOPY POLLEN
… to the canopy, to the orchard. Within Andrena, effective orchard pollinators, we found that male bees were restricted to the forest, and thus suggest that forests may be important in order to conserve these species in agricultural systems. Finally, we explore how pulsed "mast-bloom" …
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The evolution and breakdown of submesoscale instabilities
Ocean submesoscales are the subject of increasing focus in the oceanographic literature; with instrumentation now more capable of observing them in situ and numerical models now able to reach the resolution required to more fully capture them. Submesoscales are typified by horizontal spatial scales …
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Floral Scent in Salix L. and the Role of Olfactory and Visual Cues for Pollinator Attraction of Salix caprea L.
… activity on the oligolectic wild bee Andrena vaga by gas chromatography coupled with electroantennography. Altogether 16 floral scent compounds of both Salix species were physiologically active. The main component 1,4-dimethoxybenzene led to the strongest antennal signals. …
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Nonelectric, standalone heating element for an infant incubator
Anya is an incubator design intended for use in the developing world. It aims to reduce the instances of premature infant death in the developing world, specifically targeting places where household electricity is uncommon. Thus, Anya requires a nonelectric heating method. Paraffin wax, a phase …
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Aspects of Foraging in Bees: Apple Pollination, Native Bee Populations, and Honey Bee Communication
Bees are well known for their ability to pollinate a diverse range of plants. In the process of gathering food (pollen and nectar), bees transfer pollen from one flower to another, facilitating reproduction. I investigate two important aspects of foraging: pollination of an important crop by native …