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Full-Text Articles in Life Sciences
The Evolution Of Parasitism Among Bees, George E. Bohart
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 …
Mirid-Bug Injury As A Factor In Declining Alfalfa-Seed Yields, Charles J. Sorenson
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 …