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Temperature-Dependent Model For Sorghum Midge (Diptera: Cecidomyiidae) Spring Emergence, Frederick P. Baxendale, G. L. Teetes, P. J. H. Sharpe

Department of Entomology: Faculty Publications

A temperature-dependent, two-component model, based on constant-temperature development data, was formulated which described the emergence of overwintered sorghum midges, Contarinia sorghicola (Coquillett) in the field. The first model component used a poikilotherm rate equation to predict emergence rates as a function of temperature. The second component distributed emerging adults over normalized time using a temperature- independent cumulative Weibull distribution. When coupled, components formed a temperature-dependent simulation model which described the spring emergence of overwintered midges from 1979 to 1982. The model tended to predict emergence before it actually occurred in the field. This discrepancy was corrected by incorporating a 1.27-cm …

Temperature-Dependent Model For Development Of Nondiapausing Sorghum Midges (Diptera: Cecidomyiidae), Frederick P. Baxendale, G. L. Teetes, P. J. H. Sharpe, H. Wu

Department of Entomology: Faculty Publications

Constant-temperature development data were used to construct a temperature- dependent, two-component model for the development of nondiapausing sorghum midges, Contarinia sorghicola (Coquillett), from egg to adult emergence. When constant temperatures were between 20 and 36°C, nondiapausing midges completed development and emerged as adults. Development times decreased as temperature increased. Above 34°C, however, development times increased and numbers of emerged adults declined. A coupled poikilotherm rate equation and cumulative Weibull distribution provided accurate descriptions of the developmental data. Model simulations compared favorably with observed emergence of adult midges from johnsongrass and sorghum in the field throughout the season.

Soil Physical Characteristics Of Reduced Tillage In A Wheat-Fallow System, L. N. Mielke, Wallace Wilhelm, K. A. Richards, C.R. Fenster

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Soil physical characteristics of reduced tillage for fallow-wheat (Triticum aestivum L.) were compared for two soils in western Nebraska. The soil physical environment influences the amount of water that enters soil, the availability of water for plants, and the microenvironment important to soil biological processes. Fallow tillage (plow, subtill, no till) did not affect bulk density in Alliance silt loam (fine silty, mixed mesic, Aridic Argiustolls). For Duroc loam (fine silty, mixed mesic Pachic Haplustolls), in which native sod was compared to the above three wheat-fallow tillage methods, numerous effects on soil physical properties were found. Reduced tillage reduced …

Nebraska Bird Review (December 1984) 52(4), Whole Issue

Nebraska Bird Review

An Exceptional “Fall” Migration of Shorebirds along the Big Bend Reach of the Platte River … 70

1984 Fall Field Day … 71

Least Tern Eggs in Nests of the Piping Plover … 72

Nesting Common Moorhen in Lancaster County … 74

Cattle Egrets and White-faced Ibises Nesting at Valentine Refuge … 6

Notes … 76

Index of Volume 52 … 78

Index To Volume 52

Nebraska Bird Review

Accipiter sp. 14

Adcock, Dorothy 18, 58

Alexander, George 17

Irene 17

Alfred, Norris 3, 23, 56

Allison, Mary 18

Anderson, RoseAnn 17

Sheridan 17

Ardinger, Bruce 18

Arrowhead (plant) 21

Avocet, American 6, 30, 55(2), 76

. . .

Yellowlegs, Greater 6, 30, 55, 60, 70, 71

Lesser 6, 30, 55, 70, 71

Yellowthroat, Common 11, 33, 40, 41, 50, 64

Zeillemaker, C. Fred 26, 28(6), 29(4), 30(5), 31(3), 32(6), 33, 34(5)

Melly 26

“Notes” From Nebraska Bird Review (December 1984) 52(4)

Nebraska Bird Review

EARLY NESTING WOOD DUCKS. On 7 May 1983 I found a female Wood Duck with newly hatched ducklings at Cedar Island, a property along the Platte River in Sarpy County owned by Metropolitan Utilities District.—Ruth C. Green, Bellevue

GREAT CRESTED FLYCATCHER NEST. On 20 June 1984 I saw Great Crested Flycatchers nesting in a bluebird box. This was at Beaver Lake, Cass Co.—Ruth C. Green, Bellevue

LAZULI BUNTING. I saw a male Lazuli Bunting by the railroad tracks at the foot of Child’s Hollow in Fontenelle Forest, Sarpy County, on 14 May 1984.—Ray Korpi, Bellevue

GOLDEN-CROWNED SPARROW IN BOX BUTTE …

Nesting Common Moorhen In Lancaster County, William C. Garthright

Nebraska Bird Review

On 6 July 1984, at 6 PM CDT, I saw a Common Moorhen at the Capitol Beach marsh, in Lincoln. It was about 10 yards to the north when I first saw it, and I could see the red facial shield and red bill with yellow tip, the yellow legs, a thin white horizontal line along the side, and prominent white patches along either side of dark undertail coverts. It acted mildly agitated, and swam away from me but stayed in the vicinity.

At 7 the next morning I waded into the pond at that spot. This time I saw …

1984 Fall Field Day

Nebraska Bird Review

The 1984 Fall Field Day was held (officially) from noon to noon, 6/7 October, at the4-H Camp at Halsey National Forest. The weather was not the best—light rain early Saturday morning, only a couple of short showers in the afternoon, and no rain Sunday, both days dull and gray. But the attendance was good—87 were officially registered—but the added manpower could not make up for the lateness in the season and the poor weather—the tally on or near the Forest was only 81. In addition, 4 species (marked N) not recorded in the Forest were seen by a party that …

An Exceptional "Fall" Migration Of Shorebirds Along The Big Bend Reach Of The Platte River, Gary R. Lingle, Thomas E. Labedz

Nebraska Bird Review

The Big Bend reach of the Platte River extends about 80 miles from Overton to Chapman, Nebraska. This area is characterized by braided channels with numerous riverine islands bordered by cottonwoods (Populus deltoides) and willows (Salix spp.) along the high banks. Habitat between the high banks consists of open water, barren sandbars and mudflats, herbaceous islands, shrub islands, and floodplain forest.

Prolonged summer flows during 1983 were among the highest recorded this century; in excess of 20,000 cfs (cubic feet per second). Spring 1984 also consisted of high flows resulting in much scouring and shifting of …

Masthead From Nebraska Bird Review (December 1984) 52(4)

Nebraska Bird Review

Published quarterly in March, June, September, and December by the Nebraska Ornithologists' Union, Inc., as its official journal and sent free to all members who are not in arrears for dues. Subscriptions (on calendar year basis only) are $7.00 per year in the United States and $9.00 per year in all other countries payable in advance. Single copies are $2.25 each, postpaid.

Memberships (on a calendar year basis only): Student, $.3.00; Active, $7.00; Sustaining, $15.00; Family Active, $10.00; Family Sustaining, $20.00; Life, $100.00.

All dues and subscriptions should be remitted to the Treasurer, Mrs. Jack Shafer, RR2, Box 61, Wood …

Ard News December 1984

Agricultural Research Division: News and Annual Reports

CONTENTS:
PRODUCTION RESEARCH PERSPECTIVE
JOINT COUNTY PRIORITIES
WATER RESOURCES CENTER PROPOSALS
NEW FACULTY APPOINTMENTS
BIOTECHNOLOGY PROGRESS REPORT
PART-TIME CSRS APPOINTMENTS
OFFICIAL IANR LOGO
PROGRESS ACCOMPLISHMENT REPORT
STEPS TO STAGNATION
AMERICAN AGRICULTURE
RESEARCH GRANTS AND CONTRACTS RECEIVED NOVEMBER 1984
CANCER AND SMOKING DISEASE RESEARCH ANNOUNCEMENT OF FY 1915-15 REQUESTS FOR APPLICATION
NEW PROJECT

Vegetation Patterns In Relation To Topography And Edaphic Variation Nebraska Sandhills Prairie, P. W. Barnes, A. T. Harrison, S. P. Heinisch

School of Biological Sciences: Faculty Publications

Detailed studies on soil texture and moisture retention indicate a close association between edaphic features and the distribution and composition of plant communities along topographic gradients at Arapaho Prairie, a typical, semi-arid Nebraska Sandhills prairie. The vegetation characteristics of three major habitat types (ridge, slope, and valley) and several minor subtypes (swale, stable ridge, and eroding ridge) are recognized and quantitatively described. Texture analysis indicates that the soils of dune slopes and ridges are largely azonal and are very coarse with substantially lower fine fractions (silt-clay ~ 13-15%) than soils of the more lowland swale and valley sites where surfact …

The Prairie Naturalist Volume 16, No. 4. December 1984

The Prairie Naturalist

Paul B. Kannowski, Editor

Nikki R. Seabloom, Assistant Editor

Douglas H. Johnson, Book Review Editor

TABLE OF CONTENTS

VEGETATION PATTERNS IN RELATION TO TOPOGRAPHY AND EDAPHIC VARIATIONS IN NEBRASKA SAND HILLS PRAIRIE ▪ P. W. Barnes, A. T. Harrison and S. P. Heinisch

GREAT BLUE HERON NESTING BIOLOGY ON THE JAMES RIVER IN SOUTH DAKOTA ▪ E. M. Dowd and L. D. Flake

OVENBIRDS AT THE PERIPHERY OF THEIR RANGE IN WESTERN NORTH DAKOTA ▪ R. B. Hopkins

BREEDING BIRD COMMUNITY COLONIZATION OF SOWN STANDS OF NATIVE GRASSES IN NORTH DAKOTA ▪ K. F. Higgins, T. W. Arnold and R. …

Effects Of Space Shuttle Exhaust Plumes On Gills Of Some Estuarine Fishes: A Light And Electron Microscopic Study, William E. Hawkins, Robin M. Overstreet, Mark J. Provancha

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

The first few launches of the space shuttle resulted in fish kills in a lagoon near the launch site. To study this phenomenon further, sheepshead minnow (Cyprinodon variegatus), sailfin molly (Poecilia latipinna), and mosquitofish (Gambusia affinis) were exposed to the exhaust plume in buckets placed near the launch site. An open bucket provided a full exposure, a partly closed one provided an intermediate exposure, and a closed one was the control. Three h after launch, the pH of the water from the full exposure had decreased from about 7 to about 3, Al and …

Crop Residue Removal And Soil Productivity With No-Till Corn, Sorghum, And Soybean, J. W. Doran, Wallace Wilhelm, J. F. Power

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Crop residues have been considered during the past decade as alternate energy sources to supplement dwindling fossil fuel sources and enhance energy independence in the United States. Agricultural scientists have demonstrated the importance of crop residues in reducing soil erosion, enhancing the soil physical environment for plant growth, and as a reserve for major crop nutrients. In eastern Nebraska, we evaluated the effects of various amounts of surface crop residues (aboveground dry matter remaining after harvest) on dryland production of no-till corn (Zea mays L.), sorghum [Sorghum bicolor (L.) Moench], and soybean [Glycine max (L.) Merrill] over …

Atrazine Tolerance In Warm-Season Grass Seedlings, C. C. Bahler, Kenneth P. Vogel, Lowell E. Moser

Department of Agronomy and Horticulture: Faculty Publications

Atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] effectively controls many annual weeds in established warm-season range grasses but can damage some of these grasses in the early seedling stage. This study determined the relative atrazine tolerance of seedlings of selected warm-season grasses and evaluated the effectiveness of a greenhouse bioassay for seedling atrazine tolerance in range gasses. Seed of 'Pathfinder' switchgrass [Panicum virgatum L.], 'Nebraska 54' indiangrass [Sorghastrum nutans (L.) Nash], 'Butte' side-oats grama [Bouteloua curtipedula (Michx.) Torr.], an experimental blue grama 'PMK 1483' [B. gracilis (H.B.K.) Lag ex Steud], 'Plains' bluestem (Bothriochloa ischaemum var ischaemum (L.) Keng), 'Caucasian' bluestem …

Comparison Of F1'S And Inbreds As Female Parents For Sorghum-Sudangrass Seed Production, Herman J. Gorz, J. J. Toy, Francis A. Haskins, W. M. Ross

Department of Agronomy and Horticulture: Faculty Publications

Two field studies involving different groups of germplasm were conducted to compare sorghum-sudangrass, Sorghum bicolor (L.) Moench X S. sudanense (Piper) Stapf, hybrid seed production of male-sterile F₁'s with their component A-lines. The F₁'s yielded 45 and 82% more grain than their A-line counterparts in Study 1 and 2, respectively, with the increase attributable to more seeds per panicle and a greater threshing percentage. Mean values of nine traits measured on nine groups of eight F₁'s in Study 1 and seven groups of six F₁'s in Study 2 were compared with their …

Effect Of Freezing On The Hydrocyanic Acid Potential Of Field-Grown Sorghum Tillers, Francis A. Haskins, Herman J. Gorz, R. M. Hill, J. Brakke Youngquist

Department of Agronomy and Horticulture: Faculty Publications

Tissue disruption caused by freezing and thawing may contribute to rapid enzymatic breakdown of dhurrin [p-hydroxy-(S)mandelonitrile-β-D-glucoside], the cyanogenic glucoside of sorghum [Sorghum bicolor (L.) Moench], but published reports are not in agreement as to the effects of freezing on the hydrocyanic acid potential (HCN-p) of field-grown sorghum leaves. These effects were investigated in a series of experiments in the fan of 1983, a period during which weather conditions at Lincoln, NE, permitted repeated sampling of frozen and non-frozen leaves of field-grown sorghum tillers. Assays of these samples, both spectrophotometrically and with the cyanide electrode, indicated …

Influence Of Sample Treatment On Apparent Hydrocyanic Acid Potential Of Sorghum Leaf Tissue, Francis A. Haskins, Herman J. Gorz, R. M. Hill, J. Brakke Youngquist

Department of Agronomy and Horticulture: Faculty Publications

When dhurrin [p-hydroxy-(S)-mandelonitrile-β-D-glucoside], the cyanogenic glucoside of sorghum [Sorghum bicolor (L.) Moench], is hydrolyzed by autoclaving, p-hydroxybenzaldehyde (p-HB) is released. The spectrophotometric determination of p-HB concentration in autoclaved sorghum leaf extracts provides a measure of the hydrocyanic acid potential (HCN-p) of leaf tissue. Extracts of field-grown sorghum leaves contained substances that interfered with this procedure, but ether extraction effectively separated p-HB from these interfering materials. We observed that when flag leaf tissue from field-grown sorghum was dried at 75°C and then autoclaved, HCN-p values were about three times as high …

Agricultural Experiment Station News November 1984

Agricultural Research Division: News and Annual Reports

CONTENTS:
CAPITALIZING ON COMPREHENSIVE REVIEWS
NEW FACULTY APPOINTMENTS
PARTIAL RETIREMENTS
AGRICULTURAL EXPORTS
INDIRECT COST RATES
NEW OR REVISED PROJECTS
FEDERAL RESEARCH BUDGET APPROVED
SCHAEFER JOINS IANR
CAPITAL CONSTRUCTION PROGRESS ACCOMPLISHMENT REPORT
RESEARCH FUNDING ASSISTANCE
RESEARCH EXPENDITURES FOR 1983-84
RESEARCH GRANTS AND CONTRACTS RECEIVED OCTOBER 1984

Book Review: Mammals Of The Northern Great Plains By J. K. Jones, Jr., D. M. Armstrong, R. S. Hoffmann, And C. Jones, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Mammals of the Northern Great Plains is an attractive clothbound book that comes in a colored dust jacket showing a female pronghorn walking in the snow. The book is produced in a double-column format set in a 47½ by 32½ pica typebed (I personally do not like the unjustified right-hand margins on both columns). The book contains 206 figures most of which are set in a single column. Of the 206 figures, 80 are distribution maps, 104 are photographs mostly of living animals, 20 are drawings used to illustrate keys or points made in the text, and two are maps …

Effect Of Castration On Plasma Luteinizing Hormone Concentrations In Prepubertal Boars, R. J. Kittock, J. E. Kinder, R. K. Johnson

Department of Animal Science: Faculty Publications

Mean concentrations and the occurrence of pulsatile release of luteinizing hormone (LH) were determined in 14-wk-old crossbred boars (50.5 ± 1.5 kg) after bilateral or unilateral castration at 10 wk of age. Blood was collected at 10-min intervals for 5 h. Then gonadotropin releasing hormone (GnRH; 40 / μg) was given and sampling was continued at 5-min intervals for 1 h. Compared with intact boars, bilateral castration increased (P<.001) mean LH (982 ± 56 vs 389 ± 56 pg/ml), pulsatile releases of LH (7.0 ± .6 vs 2.0 ± .6 pulses/5 h) and LH pulse amplitude (617 ± 29 vs 360 ± 58 pg/ml). Unilaterally castrated boars did not differ from intact boars in any of the above measures of LH secretion. Testis weight increased more between 10 and 14 wk of age in the unilateral castrates than in the intact boars (432 ± 42 vs 245 ± 34%; P<.05). Thus, compensatory hypertrophy occurred within 4 wk of castration. Plasma testosterone was lower for bilateral castrates than for intact animals (.1 ± .8 vs 3.6 ± .9 ng/ml; P<.05) while unilateral castrates (3.8 -+ 1.0 ng/ml) and intact boars did not differ. Plasma estradiol concentrations in bilateral and unilateral castrates were not different from levels found in intact boars (1.8 ± 1.8, 8.8 ± 2.1 and 6.0 ± 1.8 pg/ml, respectively). While mean LH after GnRH was higher in bilateral and unilateral castrates than in intact boars (2,588 ± 147 and 2,693 ± 164 vs 1,928 ± 147 pg/ml; P<.01), castration did not affect the highest LH level after GnRH, time of highest level, magnitude of LH change or rate of LH response during the first 15 rain after GnRH. The rate of change of LH from 0 min to time of maximum LH of the bilateral castrates tended to be greater than that in intact boars (b=202 vs 94; P<.10). These data indicate that the negative feedback of gonadal steroids affects LH secretion.

Evaluation Of Crop Rotation For Control Of Colorado Potato Beetles (Coleoptera: Chrysomelidae) In Commercial Potato Fields On Long Island, Robert J. Wright

Department of Entomology: Faculty Publications

Leptinotarsa decemlineata (Say) densities, potato defoliation levels, and grower insecticide use were monitored in commercial potato fields with differing rotational histories on Long Island, New York. Rotation for 1 year to a nonhost grain crop (rye or wheat) significantly reduced the pest status of L. decemlineata in the following year's potato crop. Early season (late May) adult densities were reduced 95.8% in three of four comparisons in 1982 and 69.5% in two of three comparisons in 1983. In one comparison each year, early season L. decemlineata densities were low in both the rotated and nonrotated fields due to past grower …

In Memoriam: Konstantin Minaevich Ryzhikov, 1912-1983, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Obituary of Konstantin Minaevich Ryzhikov, 1912-1983.

Agricultural Experiment Station News October 1984

Agricultural Research Division: News and Annual Reports

CONTENTS:
OUTSTANDING RESEARCH AWARDS
SUPPLEMENTAL BUDGET REQUEST
IANR FACULTY SALARIES
HOME ECONOMICS REVIEW
IANR CAPITAL CONSTRUCTION REQUEST
DISTRICT STATIONS BECOME CENTERS
RESEARCH SPONSOR NEGOTIATIONS
REPORTING RESEARCH ACCOMPLISHMENTS
FEDERAL BUDGET UPDATE
FIELD LAB SECURITY
FIELD LABORATORY NAME CHANGE?
PROGRESS ACCOMPLISHMENT REPORT
COMMODITY CHECK-OFF BOARD PROPOSALS
NEW OR REVISED PROJECTS
NEW FACULTY ON BOARD
RESEARCH GRANTS AND CONTRACTS RECEIVED SEPTEMBER 1984
USDA FY '85 COMPETITIVE RESEARCH GRANTS
NSF FELLOWSHIPS AVAILABLE
PROJECT ACCOMPLISHMENTS
CANCER AND SMOKING DISEASE RESEARCH

A New Gall-Forming Species Of Anguina Scopoli, 1777 (Nemata: Anguinidae) On Bluegrass, Poa Annua L., From The Coast Of California, I. Cid Del Prado Vera, Armand R. Maggenti

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Anguina pacificae n. sp. is described and illustrated from stem galls on bluegrass, Poa annua L., from golf courses along coastal California. The females are characterized by constrictions in the anterior and posterior connections of the isthmus with the respective parts of the esophagus, the long multicellular columella, and the sharply pointed tail tip. Males are dorsally curved after death; body width is increased markedly after 13 annuli in both sexes, and the tail is conical and with an acute terminus.

Catalog Of The Recent Scandentia And Primates In The Carnegie Museum Of Natural History, Suzanne B. Mclaren, Duane A. Schlitter, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

The Section of Mammals, Carnegie Museum of Natural History, houses six specimens of Recent tree shrews and 611 specimens of Recent primates. The only family in the Order Scandentia is Tupaiidae. Primate families represented are Lemuridae, Lorisidae, Cebidae, Callitrichidae, Cercopithecidae, Pongidae, and Hominidae. For each specimen the following data are recorded: locality; date collected; catalog number; sex; age; nature of specimen; condition of specimen and comments. The latter category gives information on the condition of the skin and skeletal material, and gives information on the availability of the specimen.

Weather Risk And Size Economies Of Large Machinery In Wheat Production, Glenn A. Helmers, Romanus Monji

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

Major objectives of this study were to determine the existence of economies or diseconomies of size for large farms and to determine the impact of farmers' risk aversion level on the size of farm machinery selected.

Nebraska Bird Review (September 1984) 52(3), Whole Issue

Nebraska Bird Review

Spring 1984 Whooping Crane Records in Nebraska … 46

1983 Nebraska Nesting Survey … 47

1984 (Fifty-ninth) Spring Occurrence Report … 51

Notes … 59

Book Review … 68

“Book Review” From Nebraska Bird Review (September 1984) 52(3)

Nebraska Bird Review

Birding with a Purpose: Of Raptors, Gabboons, and Other Creatures, Frances Hamerstrom, 130 pp., 6¼ x 9¼, The Iowa State University Press, Ames. Hardcover, $13.95.

These are snippets—interesting, amusing, sometimes amazing—from Mrs. Hamerstrom’s long experience with birds and birders. She devised her own methods of marking individual birds so they could be recognized while flying free; she had to learn about trapping raptors and adapting these traps to different species; she had run-ins with authorities, and was helped by individual law enforcement officers; and she had problems (as so did others) with five high school boys who attached themselves …