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Full-Text Articles in Entomology
Beekeeping In South Dakota, R.J. Walstrom, B.H. Kantack, W.L. Berndt
Beekeeping In South Dakota, R.J. Walstrom, B.H. Kantack, W.L. Berndt
SDSU Extension Circulars
Beekeeping has provided many persons with a satisfying and continually interesting hobby. To others it means a profitable sideline easily fitted to a farming or other full-time occupation. The commercial beekeeper finds that this phase of agriculture provides him with an independent and respectable way of making a comfortable living. The purpose of this bulletin is to provide persons who are interested in starting a few colonies of bees a source of basic information suited to the Northern Great Plains conditions. South Dakota provides the essential natural ingredients for the production of sizable crops of high quality honey. Honey bees …
Color And Light Intensity Preferences Of Four Species Of Alate Cereal Aphids, Donald A. Dickmann
Color And Light Intensity Preferences Of Four Species Of Alate Cereal Aphids, Donald A. Dickmann
Electronic Theses and Dissertations
Color and light intensity preferences of 4 species of alate cereal aphids, the English grain aphid, Macrosiphum avenae (Fab.); oat bird-cherry aphid, Rhopalosiphum padi (L.); corn leaf aphid, R. maidis (Fitch); greenbug, Schizaphis graminum (Rondani); were tested under controlled conditions. No significant differences in color response were found between post-teneral (flight-active) and flight-exhausted alates of any species. Macrosiphum avenae, R. maidis, and S. graminum showed a distinct preference for yellow; R. padi usually preferred green. Alates of all species preferred high light intensities to low within the range tested (350-3500 ft-c). Preferred colors (yellow and green) were more important than …
Corixidae (Water Boatmen) Abundance And Contribution To Littoral Zone Fish Forage In Lake Poinsett, South Dakota, Richard Lee Applegate
Corixidae (Water Boatmen) Abundance And Contribution To Littoral Zone Fish Forage In Lake Poinsett, South Dakota, Richard Lee Applegate
Electronic Theses and Dissertations
Corixids were sampled each week in littoral zone areas of Lake Poinsett during the open water seasons, April-October, in 1970, 1971, and 1972. Fish were sampled each week in littoral zone areas in 1970 and food habits studies were conducted to determine if fish predation would influence corixid population dynamics. Seven genera and 15 species of the family Corixidae were collected. Major indigenous species were Palmarcorixa buenoi Abbott, Trichocorixa borealis Sailer, Cenocorixa dakotensis (Hungerford), and Sigara conocephala (Hungerford). Species migrating to Lake Poinsett in the fall to overwinter were Sigara alternata (Say), S. solensis (Hungerford), S. bicoloripennis (Walley), Hesperocorixa vulgaris …