Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 61 - 77 of 77
Full-Text Articles in Physical Sciences and Mathematics
Responses Of Caged Red-Winged Blackbirds To Methiocarb On Wild Rice, Daniel W. Moulton
Responses Of Caged Red-Winged Blackbirds To Methiocarb On Wild Rice, Daniel W. Moulton
Vertebrate Pest Conference Proceedings: 10th (1982)
Red-winged blackbirds (Agelaius phoeniceus) were offered a choice between cultivated wild rice (Zizania aquatica) treated with methiocarb and untreated wild rice. Unhulled wild rice soaked in methiocarb solution was highly effective in repelling blackbirds at residue levels <132 ppm. The responses of blackbirds to methiocarb residues <132 ppm on soaked rice were variable. Most of the blackbirds conditioned to avoid treated rice at 132 ppm of methiocarb were subsequently repelled by treated rice with residues as low as 30 ppm.
Changes In Bait Acceptance By Rabbits In Australia And New Zealand, A.J. Oliver, S.H. Wheeler, C.D. Gooding, J. Bell
Changes In Bait Acceptance By Rabbits In Australia And New Zealand, A.J. Oliver, S.H. Wheeler, C.D. Gooding, J. Bell
Vertebrate Pest Conference Proceedings: 10th (1982)
Control of rabbits, Oryctolagus cuniculus, by poisoned bait has been widely practiced in Australia and New Zealand for many years. Since the 1950s, Compound 1080 has been the active ingredient and yielded good results (ca 90% kills) when first used. Recent trails (1973-74) in New Zealand showed that the main reason for poor results obtained nowadays is the failure of many rabbits to eat bait. Recent trials in Western Australia showed that there has been a significant decline in effectiveness of rabbit control by baiting during the period 1958-1975. Shortcomings in operational technique and increased resistance to the poison 1080 …
Guard Dogs And Gas Exploders As Coyote Depredation Control Tools In North Dakota, William K. Pfeifer, Michael W. Goos
Guard Dogs And Gas Exploders As Coyote Depredation Control Tools In North Dakota, William K. Pfeifer, Michael W. Goos
Vertebrate Pest Conference Proceedings: 10th (1982)
Guard dogs and gas exploders have been successfully used in North Dakota to protect sheep from coyote (Canis latrans) depredation since the mid-1970s. They have been used in addition to other lethal and nonlethal control tools. The U.S. Fish and Wildlife Service gathered information from field testing and landowner interviews to measure their effectiveness. Guard dogs reduced the rate of depredation by 93 percent on the 36 ranches surveyed. Gas exploders deterred coyotes from depredating on 30 ranches an average of 31 days during the 1980 and 1981 grazing seasons. An increasing number of sheep producers are using these control …
Traditional Approaches For Protecting Cereal Crops From Birds In Africa, P. Ruelle, R.L. Bruggers
Traditional Approaches For Protecting Cereal Crops From Birds In Africa, P. Ruelle, R.L. Bruggers
Vertebrate Pest Conference Proceedings: 10th (1982)
Despite the recent emphasis in Africa by national and regional plant protection organizations to control pest birds, traditional farmers usually are still left to their own initiative, as they have been for centuries, to protect their crops. These farmers employ many ingenious visual and oratory frightening techniques, barriers, agronomic planting or harvesting modifications, and bird population-suppression methods. Under some circumstances these methods can reduce damage. However, their effectiveness is subject to such variables as the season of the year, the type and maturation stage of the crop, the pest species and its abundance, the size and ownership of the field, …
Aluminum Phosphide (Phostoxin) As A Burrow Fumigant For Ground Squirrel Control, Terrell P. Salmon, W. Paul Gorenzel, Walter J. Bentley
Aluminum Phosphide (Phostoxin) As A Burrow Fumigant For Ground Squirrel Control, Terrell P. Salmon, W. Paul Gorenzel, Walter J. Bentley
Vertebrate Pest Conference Proceedings: 10th (1982)
The California ground squirrel (Spermophilus beecheyi) is widely distributed throughout California. It causes serious damage to agricultural crops. Tests were conducted to evaluate the fumigant aluminum phosphide (Phostoxin®) and to compare it to the commonly used gas cartridge. Treatments consisted of applying either a single-dose (two 3-gm tablets) or double-dose (four 3-gm tablets) of aluminum phosphide, or 1 U.S. Fish and Wildlife Service gas cartridge in each burrow in the study plots. The burrow opening was then plugged with 1 sheet of newspaper and sealed with soil. Burrows in the control plot were plugged with newspaper and sealed in the …
California Registration Procedures Relative To Vertebrate Pesticides, Jon H. Shelgren
California Registration Procedures Relative To Vertebrate Pesticides, Jon H. Shelgren
Vertebrate Pest Conference Proceedings: 10th (1982)
I am very happy to be here today and to have the opportunity to talk to you about the Department of Food and Agriculture, with particular emphasis on the Department's role in registering pesticides and how this relates to Federal registration. My comments will address all pesticides including vertebrate pesticides. Under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), the Environmental Protection Agency (EPA) has broad and flexible authority. The FIFRA is a comprehensive regulatory statute and under it the EPA determines the pesticides that may be registered and for what uses. New chemicals, new uses of established products, new …
Strychnine Residue Studies And Their Implications In Rodent Control, Harry G. Smith
Strychnine Residue Studies And Their Implications In Rodent Control, Harry G. Smith
Vertebrate Pest Conference Proceedings: 10th (1982)
Applications of 0.29, 1.0, 2.63, and 5.26% strychnine-impregnated grain baits were applied below ground to 10' x 10' plots of alfalfa to determine translocation of strychnine from the soil to plants. Four replicates of each concentration were made and the alfalfa analyzed for strychnine residues. Four 10' x 10' plots were utilized as controls. Plant samples were taken on Day 1, Day 9, and Day 14. Strychnine was not detected in any of the samples above the limit of detectability (0.02ppm). Apples from trees subjected to a normal, 1 x normal, and a 3 x normal gopher control strychnine bait …
Vertebrate Pest Management And Changing Times, Donald A. Spencer
Vertebrate Pest Management And Changing Times, Donald A. Spencer
Vertebrate Pest Conference Proceedings: 10th (1982)
Everywhere one turns today there are problems. The gristmills of doom and disaster are experiencing a heyday marketing this situation as one of crisis and extinction. An advantage of being an oldster in this society is that one has the perspective to recognize that these are only problems, some simple, some complex, presenting a challenge for solution to all who will lay aside their emotions and face reality. In presenting this overview of vertebrate pest management programs, I find I must dwell too frequently on "problems." This should not be interpreted as a pessimistic outlook. Sound data with professional guidance …
Dispersal And Some Implications For Control Of The California Ground Squirrel, Dennis C. Stroud
Dispersal And Some Implications For Control Of The California Ground Squirrel, Dennis C. Stroud
Vertebrate Pest Conference Proceedings: 10th (1982)
Data from current research and from the literature indicate that a knowledge of dispersal of the California ground squirrel can help to develop control strategy. An understanding of the rate and extent of dispersal may help reduce poor results due to patchy control. A knowledge of dispersal distance can help to determine the size of a buffer zone of control which may reduce the rate of reinvasion. The seasonal timing of dispersal is predictable in the California ground squirrel, and this can help to establish follow-up control.
Mountain Lion Predation On Domestic Livestock In Nevada, H. Russell Suminski
Mountain Lion Predation On Domestic Livestock In Nevada, H. Russell Suminski
Vertebrate Pest Conference Proceedings: 10th (1982)
The mountain lion has long been considered a serious predator on domestic livestock, primarily sheep, in the state of Nevada. For the past five years (FY77-81), documented losses to lions have averaged 375 animals. While this number is not large, most losses are sustained by only a few individual livestock operators, and the losses constitute a serious economic hardship for these individuals. An average of 23 lions have been taken in response to livestock depredation complaints during each of these five years. Controlling livestock loss to mountain lions is the responsibility of the Animal Damage Control branch of the U.S. …
A Comparison Of Selected Rodenticides For The Control Of The Common Valley Pocket Gopher (Thomomys Bottae), Barry R. Tickes, Lloyd K. Cheathem, John L. Stair
A Comparison Of Selected Rodenticides For The Control Of The Common Valley Pocket Gopher (Thomomys Bottae), Barry R. Tickes, Lloyd K. Cheathem, John L. Stair
Vertebrate Pest Conference Proceedings: 10th (1982)
The common valley pocket gopher (Thomomys bottae) has become a serious agricultural pest in certain regions of the Lower Colorado River Basin. The mechanical burrow-builder is the most economical and effective method of controlling this pest although many growers and some researchers have reported less-than-satisfactory results when using this technique with currently available rodenticides. Six formulations of three toxicants including strychnine, zinc phosphide and diphacinone were applied with the burrow-builder to assess their efficacy. Results indicated that negligible control is achieved with 0.35 and 0.5% strychnine although these are the most commonly used formulations in Arizona. Diphacinone also produced negligible …
An Ipm Approach To Rodent Control On Midwestern Farms, Robert M. Timm
An Ipm Approach To Rodent Control On Midwestern Farms, Robert M. Timm
Vertebrate Pest Conference Proceedings: 10th (1982)
An Integrated Pest Management project in Nebraska is assisting fanners, particularly pork producers, in controlling damage caused by Norway rats, house mice, house sparrows, and starlings. A survey of pork producers to (1) determine the incidence of certain rodent and bird pests, (2) identify factors which contribute to pest damage and control, and (3) evaluate the project's impact, has been completed. Survey results are summarized. Continuing efforts to document economic damage caused by vertebrate pests are expected to enhance the program's impact.
Reducing Starling Depredations At Livestock Feeding Operations Through Changes In Management Practices, Daniel J. Twedt, James F. Glahn
Reducing Starling Depredations At Livestock Feeding Operations Through Changes In Management Practices, Daniel J. Twedt, James F. Glahn
Vertebrate Pest Conference Proceedings: 10th (1982)
Economic losses due to starling depredations at livestock feeding operations can be reduced by implementing management practices that limit access to or reduce consumption of grain products by starlings. Current farm management practices that reduce losses to birds are reviewed and alternate practices suggested. Management practices suggested include physical separation of feed from starlings, use of feed types that reduce the rate of consumption by starlings, and use of feeds that are either unpalatable or not physiologically usable by starlings. The reduction in starling numbers at feedlots resulting from these management practices may alleviate economic losses with a concomitant lesser …
The Use Of Fences For Predator Damage Control, Dale A. Wade
The Use Of Fences For Predator Damage Control, Dale A. Wade
Vertebrate Pest Conference Proceedings: 10th (1982)
The development of exclusion fencing has been extensive in Australia in attempts to reduce losses of crops and livestock to rabbits (Oryctolagus cuniculus), dingos (Canis familiaris Var. dingo) and other species. Restrictions on other damage control methods have led to increased efforts in the United States to utilize such fences for protection of crops and livestock from dogs (Canis familiaris), coyotes (Canis latrans) and other species. Electric fences have occasionally been used to protect apiaries from black bears (Ursus americanus) and to protect some wildlife species from carnivores. Varied fence types include conventional net-wire or combinations of net and barbed …
Assessment, Understanding And Management Of Blackbird Agriculture Interactions In Eastern Canada, Patrick J. Weatherhead
Assessment, Understanding And Management Of Blackbird Agriculture Interactions In Eastern Canada, Patrick J. Weatherhead
Vertebrate Pest Conference Proceedings: 10th (1982)
The major results of recent research on the problem of red-winged blackbird (Agelaius phoeniceus) damage to field corn (Zea mays) in eastern Canada are reviewed. In the area of damage assessment, an indirect approach relying on energetic considerations appears to provide a rapid and inexpensive means for generating reliable damage estimates. The identification of pronounced compositional changes in roost populations has provided a more accurate means for predicting the impact of any management technique relying on population reduction at roosts. Investigation of the interaction of blackbirds and insects revealed that prey species conform to general patterns of coloration, mobility and …
Green Chopped Bait For The Control Of The Oregon Ground Squirrel, Kenneth W. Wright
Green Chopped Bait For The Control Of The Oregon Ground Squirrel, Kenneth W. Wright
Vertebrate Pest Conference Proceedings: 10th (1982)
In 1972 at the Fifth Vertebrate Pest Conference, my predecessor, Loring White, described "The Adaptation to a Changing Environment of the Oregon Ground Squirrel." Today, ten years later, I will bring you up-to-date on what we are doing to control this persistent ground squirrel to a point where we can keep our farming operations going in spite of this pest. Bait-shyness or poor bait acceptance has forced us to use a green bait. For efficiency, aircraft broadcasting has become the common method of application. So that you might have a better perspective of our ground squirrel operations, I will illustrate …
Bird Problems And Their Solutions In Britain, Ernest N. Wright
Bird Problems And Their Solutions In Britain, Ernest N. Wright
Vertebrate Pest Conference Proceedings: 10th (1982)
The background and organization of research on bird pests in Britain are described and the main projects are outlined. Work is currently concentrated on bullfinches, starlings, rooks and woodpigeons together with behavioral studies aimed at developing better bird scarers.