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Sprinkler Irrigation-Pesticide Best Management Systems, Richard C. Peralta, Howard Deer, Robert W. Hill, L. Neil Allen

All Archived Publications

Pesticides reduce crop losses due to insects, pathogens, weeds and other pests, but can contaminate ground water. Ground water refers to water in the saturated portion of the soil material. Water in an unsaturated region of the soil is termed soil moisture.

Osprey Summer: Ospreys Nesting On Flaming Gorge, Ron Stewart

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The osprey, sometimes known as the "fish hawk" is one of Utah's rare and unique raptors. The osprey's diet is almost exclusively fish. Considering the osprey has evolved both physically and behaviorally to catch fish, their distribution is quite limited in a state as dry as Utah. Most ospreys only pass through Utah on their northern or southern migration but a few stop, build nests, hatch and raise their young.

Correlation Of Cochlear Pathology With Auditory Brainstem And Cortical Responses In Cats With High Frequency Hearing Loss, R. J. Mount, R. V. Harrison, S. G. Stanton, A. Nagasawa

Scanning Microscopy

Newborn kittens were treated with the aminoglycoside amikacin to produce a bilateral high frequency cochlear hearing loss. The degree and stability of hearing loss were confirmed by recording auditory brainstem evoked potentials (ABR audiograms). After maturation, cochleotopic frequency representation within primary auditory cortex (Al) was mapped using standard microelectrode recording techniques. The cochlear sensory epithelium was assessed with SEM and the pattern of damage compared with the ABR audiograms and cortical frequency maps.

Amikacin treatment resulted in various patterns of haircell damage towards the base of the cochlea. A relatively abrupt transition between damaged and undamaged haircell regions resulted in …

An Integrated Study Of The Morphological And Gross-Elemental Consequences Of Methyl Mercury Intoxication In Rats, With Particular Attention On The Cerebellum, K. Leyshon, A. J. Morgan

Scanning Microscopy

Methylmercury accumulates in the kidney and liver of rats, but fairly selectively damages the cerebellum, resulting in the clinical symptoms of neurological ataxia after prolonged exposures. Within the cerebellum, morphological examination indicated that the small granule cells beneath the Purkinje layer are especially susceptible to the toxin, showing signs of pyknosis during the phase of locomotory disability, whilst the large Purkinje cells are relatively resistant to cytotoxic injury. Flame photometric and electron probe X-ray microanalysis (EPXMA) of digested samples of the major organs failed to detect any significant changes in the Na, K, Ca, Mg, S and P concentrations of …

Cellular Basis Of Aging In The Mammalian Heart, Piero Anversa, Joseph M. Capasso

Scanning Microscopy

This review is concerned with the functional and structural changes occurring in the aging heart. These changes were investigated in an integrated fashion in Fischer 344 rats at 4, 12, 20, and 29 months after birth. Mean arterial pressure, left ventricular systolic and end-diastolic pressures, as well as stroke volume remained substantially constant up to 20 months. At 29 months, however, end-diastolic pressure was significantly increased, and dP/dt and stroke volume were depressed. Focal areas of interstitial and replacement fibrosis were markedly increased at 20 and 29 months, mostly in the subendocardial region of the ventricular wall. Also the aggregate …

The Role Of The Spleen In Lymphocyte Migration, R. Pabst, J. Westermann

Scanning Microscopy

In all species studied so far it was found that more lymphocytes migrate to the spleen than to all the lymph nodes together. Specific molecules on lymphocytes and endothelial cells regulate their entry into lymph nodes, but none of the known molecules play a role in homing to the spleen. The splenic compartments, comprising the red pulp, marginal zone, periarterial lymphatic sheath (PALS) and follicles, all show different kinetics for migrating lymphocytes. By combining ⁵¹Cr lymphocyte labeling with morphometry and two color immunohistochemistry, the migratory route of lymphocyte subsets can be followed through the spleen and absolute numbers of …

Microvascularization Of The Pleura In Rats And Guinea Pigs, S. Aharinejad, A. Lametschwandtner, P. Böck, P. Franz

Scanning Microscopy

The microvascularization of the visceral and parietal pleura was studied in rats and guinea pigs using vascular corrosion casts and scanning electron microscopy.

The visceral pleura was shown to be devoid of a vascular bed of its own. The capillary meshwork observed on the surface of the lung belongs to the pulmonary parenchyma. The parietal pleura, by contrast, possesses its own capillary network with an appropriate arterial supply and a venous drainage. The parietal pleural capillaries cover the costal regions completely, whereas the intercostal spaces are only provided by interspersed small patches of capillaries. That the feeding arteries of the …

Sphincters In The Rat Pulmonary Veins. Comparison Of Scanning Electron And Transmission Electron Microscopic Studies, S. Aharinejad, P. Böck, A. Lametschwandtner, P. Franz, W. Firbas

Scanning Microscopy

The microvasculature of the rat lung was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) of vascular corrosion casts and tissue sections. Particular emphasis was placed on postcapillary venules, pulmonary venules and small pulmonary veins (small interlobular veins).

Casts of lung capillaries appeared inconspicuous with smooth surface. On the casts of pulmonary venules and small pulmonary veins, by contrast, series of narrow annular constrictions, present at regular distances of 20-25 μm, were seen. These constrictions may be drastic, narrowing down the caliber of the vessel up to 50%. In the constrictions the marks of circularly running tubular …

Raptors And Racing Pigeons: An Analysis Of Avian Predation On Domestic Pigeons, James B. Armstrong

Wildlife Damage Management Conference

Relationships among pigeons, raptors, and man are well documented. However, there has been little effort to study the conflict between pigeon fanciers and raptors that prey upon racing pigeons. A questionnaire concerning the characteristics of raptor predation on pigeons was distributed to members of the American Racing Pigeon Union (ARPU). Three hundred and sixty-seven responses were received from ARPU members in 39 states. Cooper's hawks were the most often implicated raptor. Lofts located at the edge of wooded areas experienced the most attacks (n = 182). Most fanciers (n = 154) indicated that raptor attacks were distributed throughout …

Perspectives On Wildlife Nuisance Control: Results Of A Wildlife Damage Control Firm's Customer Survey, Lynn A. Braband, Kevin D. Clark

Wildlife Damage Management Conference

Customers of Critter Control, Inc. offices were surveyed in 1990 and 1991 to examine their views and experiences with nuisance wildlife. Most of the survey respondents were having problems with raccoons (Procyon lotor), squirrels (Sciurus spp.), skunks (Mephitis mephitis), woodchucks (Marmata monax), and moles (Talpidae). Approximately 25% of the respondents attempted to control the nuisance situation themselves before contacting Critter Control. Most customers approved of the lethal control of rats/mice (Muridae), moles, snakes, bats (Chiroptera), pigeons (Columba livia), and skunks. Most disapproved of the lethal control of deer (Odocoileus spp.), …

Modification Of Raccoon Food Resources In Parks To Reduce Rabies Risks To Humans, Stephen C. Frantz

Wildlife Damage Management Conference

In May 1990, the mid-Atlantic raccoon (Procyon lotor) rabies epizootic crossed New York State's southern border. By the end of the year, 84 rabid raccoons had been identified from a 400-km "front" in the State's southern tier of counties. By about mid-February 1991, the number of confirmed rabid raccoons increased to 134. Major metropolitan areas are threatened and predictions for the future indicate a pressing need for information and services by various government agencies. High-risk areas currently are park camp grounds, but will be extended as the outbreak progresses to include urban parks and those residential communities having …

United Conservation Alliance, Laurence R. Jahn

Wildlife Damage Management Conference

We gather here and reflect on successes in wildlife conservation, restoration, and management; and make plans for more beneficial actions. Significant achievements have been made in public education and wildlife management, as shown by increases in some wildlife populations. But a continuing pressing challenge involves responding to some wildlife population declines, as well as wildlife damage and nuisance situations, as the human population increases and dominates the landscape.

Ecological Considerations In The Management Of Wildlife Damage, Robert K. Swihart

Wildlife Damage Management Conference

Strategies for managing wildlife damage may be divided into 3 broad categories: direct manipulation of populations, manipulation of behavioral or ecological traits of pest species, and manipulation of environmental features. For each of these categories, I review the importance of ecological considerations in determining the effectiveness of management strategies. Proper incorporation of ecological information is important to the success of management strategies in all 3 categories. I predict that future demands will increase for ecologically-based strategies that require minimal intervention, and for integration of management strategies that simultaneously address problems posed by both vertebrate and invertebrate pests. Several recent ecologically-based …

Management Of Human-Raccoon Interaction In The Midst Of A Raccoon Rabies Outbreak, Charles V. Trimarchi, John G. Debbie

Wildlife Damage Management Conference

The rabies epizootic that had affected raccoon (Procyon lotor) populations in the southeastern United States since the mid-1950s jumped to West Virginia in 1977, the apparent result of importation of raccoons from Florida. During the following 14 years, the disease spread through raccoon populations in the mid-Atlantic states, so that by early 1991 infected raccoons had been identified in areas of West Virginia, Virginia, Maryland, Delaware, the District of Columbia, Pennsylvania, New Jersey and New York. Although raccoons have remained the primary vector of the disease throughout the affected areas, spillover has occurred into other wildlife, including skunks …

Use Of Livestock Protection Collars To Protect Sheep And Goats, Murray T. Walton

Wildlife Damage Management Conference

The sodium monofluoroacetate (Compound 1080) Livestock Protection Collar is selective for individual predators attacking the throat of sheep or goats and is especially useful in talcing coyotes (Canis latrans). However, fears of secondary and nontarget poisonings have resulted in restrictions on their use. They are registered for use in the United States only to kill coyotes. To satisfy U.S. Environmental Protection Agency requirements, the Texas Department of Agriculture provides training and testing for certifying collar applicators, and has monitored collar use from 1988 through 1990. During this period, 59 licensed applicators, 6 collar pools, and the Texas Animal …

Animal Damage Management: Responsibilities Of Various Agencies And The Needs For Coordination And Support, Jack H. Berryman

Wildlife Damage Management Conference

It is a pleasure and privilege to again have a part in the Eastern Wildlife Damage Control Conference and to return to Ithaca and Cornell. The opportunity is much appreciated. I commend the sponsors of the conference and their selection of the theme, "Human and Wildlife Interactions: Public Perceptions and Management Realities"–an increasingly important and compelling topic.

Extension Wildlife Damage Management In Alabama, James B. Armstrong

Wildlife Damage Management Conference

I present a compilation of wildlife damage data collected via a mail survey distributed to 146 county agents of the Alabama Cooperative Extension Service. A 55% response rate was obtained with 2 mailings. Snakes and rodents were the cause of most wildlife damage complaints. Regional differences in the number of complaints were observed for white-tailed deer (Odocoileus virginianus), coyotes (Canis latrans), and nine-banded armadillos (Dasypus novemcinctus). Information collected was used to: (1) determine the status of wildlife damage in Alabama from the perspective of the county extension agents; (2) target educational programs; and (3) …

An Avian/Airport Study For Standiford Airport, Louisville, Kentucky: Results And Management Implications, Bernice U. Constantin, John K. Floyd

Wildlife Damage Management Conference

An avian/airport study was conducted by the U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Animal Damage Control (ADC) from 9 February 1989-18 March 1990 to evaluate near-term bird control needs at Standiford Field Airport (SDF), Louisville, Kentucky. Field surveys were performed on SDF and the Outer Loop Landfill (OLL) to gather data on both daily and seasonal trends in bird activity and effectiveness of management efforts employed by the OLL operator to control bird activity. Data for high-interest species groups were sorted according to site, time of day, weather, and month. Raptors were present at the airport …

Wildlife Damage Management: Policy And Professional Considerations, Harry E. Hodgdon

Wildlife Damage Management Conference

I am honored by the opportunity to be part of this conference and to participate with such a distinguished panel this morning.

Today I have been asked to address policy and professional considerations as they relate to wildlife damage management. As an advocate of professional wildlife management, I will share with you some of the problems and issues that confront, frustrate, and confound us; some sense of the problems that lie ahead; and some thoughts on what we need to do to ensure the wildlife profession remains relevant in the future.

The Effectiveness Of Soap In Preventing Deer Browsing, Michael J. Fargione, Milo E. Richmond

Wildlife Damage Management Conference

A series of bioassays was performed to evaluate the effectiveness of soap and soap components as deer (Odocoileus virginianus) repellents. Sweet-corn plots protected with tallow-based soap bars, nontallow bars, and those sprayed with the commercial repellent Hinder^®, experienced significantly reduced browsing compared with untreated plots. Damage to plots protected with tallow-based soap was less than damage to nontallow soap plots, while Hinder^®-treated plots had intermediate damage. In a second bioassay, 2 spray applications of soap were found to be as effective as soap bars in preventing browsing to native vegetation over a 126-day period. …

Training Tomorrow's Specialists In Wildlife Damage Management, Robert H. Scmidt, Michael R. Conover, Raymond D. Dueser, Frederick F. Knowlton, Terry A. Messmer

Wildlife Damage Management Conference

In 1990, Utah State University (USU) established a U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Animal Damage Control (ADC)-funded center dedicated to research, education, and extension in wildlife damage management. USU's Program in Wildlife Damage Management is designed to increase appreciation for wildlife damage management among wildlife professionals, provide superior training for future practitioners of wildlife damage management through education and innovative research, and create better public understanding of the role of wildlife damage management in today's society.

Effectiveness Of Drc-1339 Baiting For Reducing Blackbird Damage To Sprouting Rice, James F. Glahn, E. Allen Wilson

Wildlife Damage Management Conference

Under a Special Local Needs (Section 24[c]) registration, the effectiveness of a 2% DRC-1339-treated brown rice baiting program to reduce bird damage to sprouting rice was evaluated during 1989 and 1990 at the Millers Lake blackbird roost, Evangeline Parish, Louisiana. After prebaiting with untreated rice, treated bait diluted with untreated rice at a ratio of 1:50 or 1:25 in 1989, and 1:10 in 1990, was applied at a rate of 112 kg/ha at sites strategically located under blackbird flightlines. Total treated bait mixtures applied to these sites were 3,487 kg in 1989 and 3,071 kg in 1990, of which an …

Minimizing Deer Damage To Forest Vegetation Through Aggressive Deer Population Management, Raymond J. Winchcombe

Wildlife Damage Management Conference

Controlled hunts were used annually between 1976-90 on the Mary Flagler Cary Arboretum in southeastern New York to control deer (Odocoileus virginianus) population expansion and prevent over-browsing of forested and landscaped areas. The primary objective of the hunts was to remove sufficient numbers of adult female deer each year to stabilize herd growth and minimize browsing pressure. Hunters had to register early, attend a preseason meeting, pass a shooting proficiency test, apply for a deer management permit, and pay a fee. Spring browse-use surveys, using several tree species as an index to browsing pressure, showed low use through …

The Need And Difficulty Of Bringing The Pennsylvania Deer Herd Under Control, Gary W. Witmer, David S. Decalesta

Wildlife Damage Management Conference

The Pennsylvania white-tailed deer (Odocoileus virginianus) herd has increased dramatically in the last several decades, despite greatly increased harvests. The high statewide deer density (11 + deer/km²) causes serious losses to agricultural crop production, forest regeneration, and diversity of forest flora and fauna. High deer numbers are associated with an excessive number of vehicle-deer accidents, and is implicated in the rapid increase in the incidence of Lyme disease in humans. Current efforts to reduce deer densities locally and statewide (extended antlerless harvest seasons and special farm hunts) are not solving the damage problem. Other solutions should …

Efficacy And Methodology Of Urban Pigeon Control With Drc-1339, Keith M. Blanton, Bernice U. Constantin, Gerald L. Williams

Wildlife Damage Management Conference

During 1990 and 1991, feral pigeon (Columbia livia) baiting programs using compound DRC-1339 were conducted in 6 cities in Kentucky and Tennessee. U. S. Department of Agriculture, Animal and Plant Health Inspection Service, Animal Damage Control (ADC) personnel evaluated each problem site, selected bait sites, supervised prebaiting, mixed, and applied toxic bait In most cases, local personnel conducted the prebaiting and disposed of dead birds. Seven pigeon flocks containing 95-735 birds were reduced by up to 100% with 1 or 2 baitings with 0.37% DRC-1339-treated bait Most birds died at their roosting areas or on rooftops where they …

Synopsis Of A Course On The Principles Of Wildlife Damage Management, Michael R. Conover

Wildlife Damage Management Conference

Five courses were offered by Utah State University's Program in Wildlife Damage Management (WDM) in 1991: (1) Principles of WDM, (2) WDM Techniques, (3) Wildlife–Livestock Relationships, (4) WDM Policy, and (5) Urban Wildlife Management Principles of WDM was the introductory course in this series. It was an upper-division course; most students were in the Colleges of Agriculture and Natural Resources. In this paper, I provide a synopsis of this course hoping such information will be useful to other people designing a course on this topic.

Rather than using a textbook for Principles of WDM, students were required to read papers …

Survey Of Bird Damage To Blueberries In North America, Michael L. Avery, John W. Nelson, Marcia A. Cone

Wildlife Damage Management Conference

In this survey of 15 states and British Columbia, 84% of the 49 respondents considered bird damage to blueberries (Vaccinium sp.) to be serious or moderately serious. As in a similar 1972 survey, the European starling (Sturnus vulgaris), American robin (Turdus migratorius), and common grackle (Quiscalus quiscula) were listed as the most serious pest species. Most of the people surveyed who formerly used Mesurol® to control bird depredations felt that the severity of bird damage increased in 1989 when the registration for Mesurol® use on fruit lapsed. Based on the responses to …

Sheep And Goat Losses To Predators In The United States, Guy Connolly

Wildlife Damage Management Conference

This paper analyzes and compares 3 recent estimates of the value of sheep, lambs, and goats killed by predators in the United States. The estimates, by Pearson (1986a,b), the General Accounting Office (GAO 1990), and the National Agricultural Statistics Service (NASS 1991b), varied from $18 million to $59.7 million annually due to differences in scope, assumptions, data, and estimation methods of the 3 studies. Pearson's and NASS's estimates of the value of sheep and lambs lost to predators in 17 western states totaled $38.3 million and $18.3 million in 1984 and 1990, respectively. The difference between …

Wildlife Damage Education At West Virginia University, Edwin D. Michael

Wildlife Damage Management Conference

West Virginia University has offered a formal wildlife damage course in each of the last 2 years (1990 and 1991). Prior to offering the formal course in 1990, the topic of wildlife damage was presented as one section of 2 different courses: Introduction to Wildlife Management (for non wildlife majors), and Principles of Wildlife Management (a senior-level course required for wildlife majors).

Wildlife Damage Education At Auburn University, Nicholas R. Holler

Wildlife Damage Management Conference

Wildlife Damage Control is offered as a 3-hour course during winter quarter in alternate years at Auburn University. This course is taught simultaneously at the undergraduate and graduate levels. Prevention and Control of Wildlife Damage (R. Timm, ed.) 1983. Nebraska Cooperative Extension Service, University of Nebraska-Lincoln) is the course text, but numerous outside readings are provided on specific topic areas. Graduate students are given additional required reading material, must complete a term paper, and are given examinations requiring greater synthesis of ideas than do those administered to undergraduates. An optional weekend field trip, arranged in cooperation with United States Department …