Life Sciences Commons^™

The Α-Glycerophosphate Cycle In Drosophila Melanogaster Iv. Metabolic, Ultrastructural, And Adaptive Consequences Of Αgpdh-1 "Null" Mutations, Stephen J. O'Brien, Yoshio Shimada

Biology Faculty Articles

"Null" mutations previously isolated at the αGpdh-1 locus of Drosophila melanogaster, because of disruption of the energy-producing α-glycerophosphate cycle, severely restrict the flight ability and relative viability of affected individuals. Two "null" alleles, αGpdh-1^BO-1-4, and αGpdh-1^BO-1-5, when made hemizygous with a deficiency of the αGpdh-1 locus,Df(2L)GdhA, were rendered homozygous by recombination with and selective elimination of the Df(2L)GdhA chromosome. After over 25 generations, a homozygous αGpdh-1^BO-1-4stock regained the ability to fly despite the continued absence of …

Population Suppression Of Western Corn Rootworm By Adult Control With Ulv Malathion, K. P. Pruess, John F. Witkowski, Earle S. Raun

Department of Entomology: Faculty Publications

ULV malathion (9.7 oz AI/acre) was applied by air to a 16 square-mile area during August of 1968, 1969, and 1970. Adult Diabrotica virgifera LeConte populations were reduced the following season by 39, 54, and 72%. No economic infestations occurred in the treated area the year following any application. Postspray migration of beetles was very limited, but adult migration during the peak emergence period the following season contributed to repopulation of the treated area. Migration and fecundity appear to be density-dependent factors which favor increases under low populations. Area suppression does not appear economically feasible, but adult control in individual …

The Population Dynamics Of Tanypus Stellatus Coquillett (Diptera: Chironomidae) In Goshen Bay Of Utah Lake, Dennis Kenji Shiozawa

Theses and Dissertations

The population dynamics of Tanypus stellatus in Goshen Bay of Utah Lake was investigated from July 18, 1973, to August 5, 1974. Samples were collected from three stations with an Ekman grab and a K-B corer. The samples were washed in a 110 micron nitex screen and then floated in a sucrose solution. The K-B core was used to determine the vertical distribution of Tanypus stellatus. Ninety-six percent of the Tanypus stellatus larvae are located in the top five centimeters; 99 percent are less than ten centimeters deep. The Ekman grab was used to study the population dynamics of the …

Tarnished And Alfalfa Plant Bugs In Alfalfa: Population Suppression With Ulv Malathion, K. P. Pruess

Department of Entomology: Faculty Publications

ULV malathion (9.7 oz AI/acre) was applied to a 16 mi² area in August 1968, 1969, and 1970 for western corn rootworm, Diabrotica virgifera LeConte, adult control. Nontarget insects in alfalfa, also treated, were monitored. Tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), was reduced 89–98%. Survival of eggs and adult migration resulted in rapid reinfestation of the treated area in 1969 and 1970; adult migration alone was important in 1968. Alfalfa plant bug, Adelphocoris lineolatus (Goeze), was reduced 96–98%. Repopulation following the 1969 and 1970 treatments was by development from eggs surviving the treatment. The 1969 treatment resulted …

Response Of Insects To U.V. Light And Varying Intensities Of White Light, Tim Matthews

Honors Theses

Object: To determine the sensitivity of insects to ultraviolet light and also to verify their response to varying intensities of white light.

Theory: Insects are generally sensitivity to light of any wave-length. Some insects' reactions are due to the response of specialized epidermal cells whereas the center of most response is in the compound eye. The reaction is generally thought to be due to an electro-chemical reaction within the light sensitive cells of the compound eye, i.e. mainly the cells of the crystalline cone and the rhabdomere. Insects tend to react more strongly to light in the ultraviolet region although …

The Ecology Of The Dominant Tick Species In The Northwestern Portion Of The Dismal Swamp National Wildlife Refuge, Mary Keith Garrett

Biological Sciences Theses & Dissertations

Elements of the ecology of the two dominant man-biting ticks were studied during 1971-1973 in two locations in Southeastern Virginia, namely, what is now the Dismal Swamp National Wildlife Refuge and Newport News City Park. Tick species composition, relative abundance, density, and distribution in the two areas were compared. In addition, the Dismal Swamp locality was used as a test area for studies on the survival of native, lab reared and translocated Dermacentor variabilis (Say) and Amblvomma americanum (L.) in relation to selected abiotic factors. The Newport News locality served as a control area for these studies.

The species …

Tb78: Sequential Surveys Of The Pine Leaf Chermid, Pineus Pinifoliae, John B. Dimond

Technical Bulletins

Sequential survey procedures are described for classifying damage to white pine produced by the pine leaf chermid. Damage classes are based on degree of needle stunting, and field procedures for making measurements are given. Survey procedures are also presented for classifying infestation levels of two stages of the insect. These allow prediction of damage levels before damage occurs.

Response Of Soybean Insects To Foliar Applications Of A Chitin Synthesis Inhibitor Th 6040, S. G. Turnipseed, E. A. Heinrichs, R. F. P. Da Silva, J. W. Todd

Department of Entomology: Faculty Publications

The activity of TH 6040, a chitin synthesis inhibitor, was determined against velvetbean caterpillar, Anticarsia gemmatalis Hübner, and other soybean defoliators in field tests in Georgia, South Carolina, and Brazil. Single applications at rates as low as 75 g AI/ha afforded adequate initial and excellent residual control of A. gemmatalis and some suppression of low populations of Plusia spp. Two applications at higher rates gave significant control of soybean looper, Pseudoplusia includens (Walker), and showed promise against green cloverworm, Plathypena scabra (F.), and Mexican bean beetle, Epilachna varivestis Mulsant. Populations of geocorids and nabids were lower in 1 test, possibly …

Antioxidants For Corncob Grit-Soybean Oil Bait Used To Control Imported Fire Ants, D. P. Jouvenaz, W. A. Banks, C. S. Lofgren, D. M. Hicks

Entomology Papers from Other Sources

Antioxidants were evaluated for their potential for retarding the development of rancidity, a major factor affecting field life of fire ant bait. In a modification of the method of Lofgren et al. (1961. Imported fire ant toxic bait studies: the evaluation of various food materials.

Effects Of Mosquito Control Chemicals On Aquatic Fauna, J. L. Lancaster Jr., M. V. Meisch

Technical Reports

No mosquito abatement districts have ever been organized in Arkansas. Mosquito control efforts have been largely adulticiding operations by either aerial application or ground thermal fogging machines. Practically no chemical applications have been directed at the larval stage in residual water in ditches and depressions from which adult populations arise. Some larviciding with ethyl parathion has been done in ricefields. Although the treatment is very effective in mosquito reduction, voluntary treatment has not been completely successful. Because relatively little insecticide has been used as a larvicide in Arkansas, it was possible to evaluate the effect of recommended larvicides on non-target …

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

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

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 …

Response Of Insects To Ultraviolet Light As Compared To White Light And Observation Of Other Factors Involved In Their Response, Part 2, Tim Matthews

Honors Theses

The goal of this experiment was to confirm the response of insects to ultraviolet light as compared to white light. This is the data collecting portion of the experiment.

Another equally important objective was simply to observe and record the insects' response to the light and their relation to factors other than the light itself. The possibility of a connection between the number of insects attracted to the light and the intensity of the moonlight was not thought of until later in the experiment.

To develop my powers of observation was an important goal. Any type of research is more …

Diversifying Selection And Ecotypic Variation In Experimental Populations Of Drosophila Melanogaster, James Richard Todd

Dissertations, Theses, and Masters Projects

No abstract provided.

A Brief Summary Of Insects's Vision And Their Response To Light, Tim Matthews

Honors Theses

Insects have been studied and observed since man first walked this earth. Man's first observation was that some insects were quite palatable. One of Christ's contemporary's, John the Baptist, maintained a diet which consisted of "honey and locusts". The spittings of another insect provided nourishment for the Children of Israel during the Exodus. Even today insects are of primary importance in the ecology. It is only a small minority of the insect population that are nuisances. The vast majority of the insect population is not only beneficial to man but also to the rest of the animal kingdom and to …

Determination Of The Ld-50 Level For 2,4-D On Wild Type Culex Pipiens Mosquito Larvae In Illinois, William H. Ettinger

Masters Theses

The LD-50 levels for 2,4-D and Ronnel were determined and compared on the larvae of Culex pipiens Linneaus mosquitoes. The World Health Organization technique for the 24 hour bioassay was employed. Ronnel served as an indicator of susceptibility to pesticides and it was found that 2,4-D is toxic to mosquito larvae with an LD-50 level of 1.95 p.p.m. It was also found that a concentration of 20 p.p.m. ethanol or greater causes lethality in the larvae.