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1989

Kansas Agricultural Experiment Station Research Reports

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Articles 31 - 60 of 90

Full-Text Articles in Life Sciences

Evaluation Of Oral Escherichia Coli Bacterin And Water Medication On Performance Of Weaned Pigs (1989), D A. Schoneweis, R I. Nicholson, G E. Fitzner, Robert H. Hines Jan 1989

Evaluation Of Oral Escherichia Coli Bacterin And Water Medication On Performance Of Weaned Pigs (1989), D A. Schoneweis, R I. Nicholson, G E. Fitzner, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Odd-numbered pigs in new-born litters were vaccinated on d 1 with an oral Escherichia coli bacterin and their performance after weaning was compared with that of nonvaccinated littermates (even numbered pigs). In addition, each group of pigs was allotted to four water medication treatments that were administered from d 2 to d 6 after weaning. No significant interaction between vaccine and water treatment was observed. Vaccinated and non-vaccinated pigs performed similarly throughout the trial for the traits of ADG, ADFI, and F/G, indicating no beneficial effect from vaccination. Water medication after weaning did not affect performance or incidence of scours …

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Evaluation Of Water Oxygenation Onmilk Production: Milk Composition Andsomatic Cell Concentration In Milk (1989), John E. Shirley, C. Galdamez, J. Estrada Jan 1989

Evaluation Of Water Oxygenation Onmilk Production: Milk Composition Andsomatic Cell Concentration In Milk (1989), John E. Shirley, C. Galdamez, J. Estrada

Kansas Agricultural Experiment Station Research Reports

Forty Holstein cows in mid-lactation were utilized to evaluate the effects of water oxygenation on milk production, milk composition, and somatic cell count. Cows were fed a total mixed ration consisting of 25% alfalfa, 25% corn silage, and 50% corn-soy concentrate on a dry matter basis. Treatments included a 7-day preliminary period followed by two 28-day periods in which the treatments were reversed. Water consumption, milk production, milk composition, and somatic cell count were not different between treatments. Cows receiving oxygenated water were more docile and easily managed than control cows. Ozone introduced into water forms hydrogen peroxide, nitrous oxide, …

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Involution Of The Uterus Of Dairy Cattle (1989), Edward P. Call Jan 1989

Involution Of The Uterus Of Dairy Cattle (1989), Edward P. Call

Kansas Agricultural Experiment Station Research Reports

The rate of involution of the bovine uterus is remarkable. By 20 days after calving, tissue sloughing and hemorrhaging have ceased, and the size of the uterus has been reduced by more than 80%. By 40 days, the uterus has completely involuted except for isolated pockets of leukocytes. Any reproductive or metabolic disorders around calving will delay involution. A preventive herd health program (PHHP) including a reproductive examination of cows within a month after calving will pay dividends in improved reproductive performance. With a sound PHHP, servicing cows on the first heat after 42 days fresh is recommended.; Dairy Day, …

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Feed Utilization During Late Gestation By Polled Hereford And Simmental Cows, R.R. Schalles, G.H. Kiracofe, J.W. Wright Jan 1989

Feed Utilization During Late Gestation By Polled Hereford And Simmental Cows, R.R. Schalles, G.H. Kiracofe, J.W. Wright

Kansas Agricultural Experiment Station Research Reports

Thirty-one Polled Hereford and 29 Simmental cows were individually fed two energy levels for about the last 4 months before calving. Weight, condition score, backfat thickness, and reproduction were evaluated. No differences were found in efficiency of feed utilization between breeds or between energy levels. These cows started the experiment in moderate body condition, and a 10% reduction in dietary energy level during late gestation did not affect their reproductive performance.

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Influence Of Milk Levels Of Beef Cows On Returns: A Simulation Approach, R.R. Schalles, K.O. Zoellner, L.S. Clarke Jan 1989

Influence Of Milk Levels Of Beef Cows On Returns: A Simulation Approach, R.R. Schalles, K.O. Zoellner, L.S. Clarke

Kansas Agricultural Experiment Station Research Reports

Results of four simulated production systems indicated that high levels of milk produced calves that were heavier at weaning, primarily because of an increase in body fat. High levels of milk production, however, were a disadvantage when calves went directly to the feedlot. With slow-growing calves, the fat either had to be depleted postweaning, or the calves had to be slaughtered at less-than-desirable weights in order to maintain desirable carcass fat. High milk intake is more tolerable for calves with fast growth rates, whereas low milk intake is a an economic necessity for calves with slow growth rates. The moderate …

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Splay-Foot In Cattle, R.R. Schalles, R.W. Markham, H.W. Leipold, M.F. Spire Jan 1989

Splay-Foot In Cattle, R.R. Schalles, R.W. Markham, H.W. Leipold, M.F. Spire

Kansas Agricultural Experiment Station Research Reports

Angular limb deformity, observed in several breeds of cattle, results in a knock-kneed and splay-footed condition in the front legs. This study shows that angular limb deformity is a congenital structural defect, inherited as a simple, autosomal, recessive trait.

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Conception Rates Of Beef Heifers Treated With Gnrh Analog At The Time Of Estrus Or At The Time Of Artificial Insemination., L.R. Corah, W.E. Beal, M.F. Spire, Jeffrey S. Stevenson Jan 1989

Conception Rates Of Beef Heifers Treated With Gnrh Analog At The Time Of Estrus Or At The Time Of Artificial Insemination., L.R. Corah, W.E. Beal, M.F. Spire, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Injecting a GnRH-analog at the time of estrus or at insemination did not generally improve conception rates in heifers inseminated following a synchronized estrus. However, within some herds. a significant positive response was noted.

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Influence Of Limited-Creep Feeding On Pre- And Postweaning Performance Of Spring-Born Calves, C.E. Binns, F.K. Brazle, Gerry L. Kuhl, D.D. Simms, K.O. Zoellner, L.R. Corah Jan 1989

Influence Of Limited-Creep Feeding On Pre- And Postweaning Performance Of Spring-Born Calves, C.E. Binns, F.K. Brazle, Gerry L. Kuhl, D.D. Simms, K.O. Zoellner, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Limit-feeding a high protein creep (36% CP) and a high energy creep (16% CP) was compared with no supplementation in a 61-day preweaning trial. Salt was used to limit daily creep intake to 1.5 to 2.0 lb per head. Calves given the limited energy and protein creep feeds outgained (P<.01) the unsupplemented calves by 0.2 lb and 0.3 lb, respectively. Conversion of creep feed consumed to extra gain was 6.7 and 5.3 for the energy and protein creep-fed calves, respectively (salt included). Trucking shrink of the noncreep-fed calves on the day of weaning and shipping was 4.9 lb and 7.0 lb less (P<.05) than that of the energy and protein creep-fed calves, respectively. Postweaning daily gains of the energy creep-fed calves was higher than those of both the protein creep-fed calves (P=.09) and the noncreep-fed calves (P<.01) by 0.3 lb and 0.5 lb, respectively. The energy creep-fed calves consumed more (P<.05) daily dry matter than the protein creep-fed and unsupplemented calves. Little difference was observed in postweaning feed conversion among creep treatments.

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Syncro-Mate B® Induces Estrus In Cows Without Ovaries, W.J. Mcguire, G.H. Kiracofe Jan 1989

Syncro-Mate B® Induces Estrus In Cows Without Ovaries, W.J. Mcguire, G.H. Kiracofe

Kansas Agricultural Experiment Station Research Reports

Syncro-Mate B® was capable of inducing estrous behavior in ovariectomized cows. Lengthening the norgestomet implant period from 9 to 18 days did not prevent estrus. The ability of Syncro-Mate B to induce estrous behavior in ovariectomized cows helps explain the variable conception rates obtained after using this product in intact cows.

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Visual Body Condition Score Of Cows, C.K. Clarke, R.R. Schalles Jan 1989

Visual Body Condition Score Of Cows, C.K. Clarke, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Condition scores are often used to describe the "fleshiness" of cows. These scores range from 1 (extremely emaciated) to 9 (extremely fat).

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Effects Of Winter Herbage Removal On Flint Hills Rangeland, Lisa M. Auen, Clenton E. Owensby Jan 1989

Effects Of Winter Herbage Removal On Flint Hills Rangeland, Lisa M. Auen, Clenton E. Owensby

Kansas Agricultural Experiment Station Research Reports

Intensive-early stocking (lES) in the Kansas Flint Hills has greatly increased livestock production efficiency. The potential for grazing of regrowth on IES pastures the following winter was studied by mowing different plots on a monthly basis from October to April, 19831985. Winter herbage removal had no significant effect on herbage production in the following seasons or on the total nonstructural carbohydrates (TNC) of big bluestem (Andropogon gerardii) rhizomes. Since there was no reduction in herbage yield for any mowing date, cattle producers can apparently restock IES pastures after October 1.

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Performance Of Stocker Steers Grazing Smooth Bromegrass At Two Stocking Rates And Dewormed With Morantel Tartrate, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas Jan 1989

Performance Of Stocker Steers Grazing Smooth Bromegrass At Two Stocking Rates And Dewormed With Morantel Tartrate, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas

Kansas Agricultural Experiment Station Research Reports

Early-intensive grazing of smooth bromegrass reduced animal gains but improved gain/acre. Morantel tartrate reduced fecal nematode egg counts but had no effect on animal performance at either stocking rate

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Influence Of Supplemental Protein Concentration On Intake, Utilization, And Quality Of Diet Selected By Steers Grazing Dormant Tallgrass-Prairie, T. Delcurto, R.C. Cochran, L.R. Corah, A.A. Beharka, E.S. Vanzant Jan 1989

Influence Of Supplemental Protein Concentration On Intake, Utilization, And Quality Of Diet Selected By Steers Grazing Dormant Tallgrass-Prairie, T. Delcurto, R.C. Cochran, L.R. Corah, A.A. Beharka, E.S. Vanzant

Kansas Agricultural Experiment Station Research Reports

Fifteen ruminally and 12 esophageally cannulated steers were randomly assigned to receive low (LP), moderate (MP), and high (HP) crude protein (CP) supplements in a 23-day winter grazing trial designed to evaluate dormant tallgrass forage intake and utilization. Supplemental CP levels were 13, 26, or 39%, respectively. Forage organic matter (OM) intake was greatest (P<.05) for the MP steers. Likewise, fiber (NDF) digestibility and ruminal fill were largest (P<.10) for the MP treatment. Furthermore, the quality of diet selected tended to improve with increasing supplemental protein concentration. Increasing CP concentration in supplements dramatically improves the intake and utilization of dormant forage. In this study, intake and digestibility were optimized with the MP supplement.

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Effect Of Limited-Creep Feeding On Performance Of Spring-Born Calves: Results Of 1988 Field Trials, D.D. Simms, Gerry L. Kuhl Jan 1989

Effect Of Limited-Creep Feeding On Performance Of Spring-Born Calves: Results Of 1988 Field Trials, D.D. Simms, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Two field trials were conducted to evaluate limited-creep feeding of spring- born calves using pelleted creep rations with either 0.5, 5, or 10% salt. Average daily gain was increased (P<.05) over controls in trial 2 and when both trials were combined. However, intakes were higher than desired and feed conversion much poorer than expected.

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Influence Of Level Of Grain Supplementation On The Performance Of Intensive-Early Stocked Steers, R.C. Cochran, E.S. Vanzant, Clenton E. Owensby Jan 1989

Influence Of Level Of Grain Supplementation On The Performance Of Intensive-Early Stocked Steers, R.C. Cochran, E.S. Vanzant, Clenton E. Owensby

Kansas Agricultural Experiment Station Research Reports

Two levels of sorghum grain supplementation (2 or 4 lb/day) for"¢steers in an intensive-early stocking program tended to increase average daily gain in direct proportion to increasing supplement level (2.7 and 2.9 lb/day. respectively, compared to 2.5 lb with no supplement). Similarly, grass remaining in the pastures after the cattle were removed on July 15, and at the end of the growing season on October 1, was greater when cattle were supplemented.

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Evaluation Of Wheat Middlings As A Supplement For Cattle Consuming Winter Range Forage, G.D. Sunvold, R.C. Cochran, E.S. Vanzant, S.D. Brandyberry, R.B. Hightshoe, T. Delcurto Jan 1989

Evaluation Of Wheat Middlings As A Supplement For Cattle Consuming Winter Range Forage, G.D. Sunvold, R.C. Cochran, E.S. Vanzant, S.D. Brandyberry, R.B. Hightshoe, T. Delcurto

Kansas Agricultural Experiment Station Research Reports

Intake of dormant, bluestem-range forage was increased by feeding steers supplements based on wheat middlings or soybean meal + sorghum grain, although the degree of influence on forage intake depended on type and level of supplementation. All supplements increased (P<.10) total diet digestibility. However, fiber digestibility tended to be slightly lower for steers receiving the high level of wheat middlings and the soybean meal + sorghum grain supplement.

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Soybean Meal+Milo, Alfalfa Hay, And Dehydrated Alfalfa Pellets As Protein Sources For Steers Fed Dormant, Native Tallgrass Forage In Drylot, T. Delcurto, R.C. Cochran, A.A. Beharka, E.S. Vanzant, Tiruvoor G. Nagaraja Jan 1989

Soybean Meal+Milo, Alfalfa Hay, And Dehydrated Alfalfa Pellets As Protein Sources For Steers Fed Dormant, Native Tallgrass Forage In Drylot, T. Delcurto, R.C. Cochran, A.A. Beharka, E.S. Vanzant, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

Sixteen ruminally-cannulated steers consuming dormant tallgrass-prairie forage were randomly assigned to one of four treatments: 1) control, no supplement; 2) soybean meal (SBM)+sorghum grain; 3) alfalfa hay; or 4) dehydrated alfalfa pellets. Forage dry matter (DM) intake was at least doubled by all three supplemental protein treatments (P<.01). In addition, steers supplemented with dehydrated alfalfa pellets displayed 15% higher forage DM intakes than steers supplemented with SBM+sorghum grain or alfalfa hay. Total DM digestibility did not differ (P>.10) among treatments; however, fiber (NDF) digestibility was depressed in steers supplemented with SBM+sorghum grain or dehydrated alfalfa pellets, compared with controls. Results from this study reinforce the concept that supplemental protein improves forage intake and utilization. Additionally, alfalfa hay and dehydrated alfalfa pellets appear to be at least as effective as …

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Soybean Meal+Sorghum Grain, Alfalfa Hay, And Dehydrated Alfalfa Pellets As Protein Supplements For Beef Cows Grazing Dormant, Tallgrass-Prairie, T. Delcurto, R.C. Cochran, L.R. Corah, E.S. Vanzant Jan 1989

Soybean Meal+Sorghum Grain, Alfalfa Hay, And Dehydrated Alfalfa Pellets As Protein Supplements For Beef Cows Grazing Dormant, Tallgrass-Prairie, T. Delcurto, R.C. Cochran, L.R. Corah, E.S. Vanzant

Kansas Agricultural Experiment Station Research Reports

Eighty-six pregnant. Hereford x Angus cows were randomly assigned to one of three winter supplement treatments: 1) soybean meal+sorghum grain, 2) alfalfa hay, or 3) dehydrated alfalfa pellets. Cows supplemented with dehydrated alfalfa pellets gained more (P<.05) weight during gestation and lost the least (P<.05) weight at calving. However, no differences (P>.10) were detected in cow body condition change. reproductive efficiency, or calf growth.

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Effect Of Inoculants And Npn Additives On Dry Matter Recovery And Cattle Performance: A Summary Of 22 Trials, K.K. Bolsen, A. Laytimi, Ronald V. Pope, Jack G. Riley Jan 1989

Effect Of Inoculants And Npn Additives On Dry Matter Recovery And Cattle Performance: A Summary Of 22 Trials, K.K. Bolsen, A. Laytimi, Ronald V. Pope, Jack G. Riley

Kansas Agricultural Experiment Station Research Reports

Results from 22 trials comparing dry matter (DM) recovery and cattle performance of inoculated or non-protein nitrogen (NPN)-treated silages to controls were summarized using paired t-test analysis. Inoculants consistently improved DM recoveries and gains per ton of crop ensiled in both com and forage sorghums. The use of NPN adversely affected nutrient preservation and gain per ton of crop ensiled, particularly for the wetter forage sorghums.

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Additive-Treated Corn And Forage Sorghum Silages For Growing Cattle, K.K. Bolsen, A. Laytimi, R.A. Hart, F. Niroomand, J. Hoover Jan 1989

Additive-Treated Corn And Forage Sorghum Silages For Growing Cattle, K.K. Bolsen, A. Laytimi, R.A. Hart, F. Niroomand, J. Hoover

Kansas Agricultural Experiment Station Research Reports

Whole-plant corn silages were treated with Ecosyl® or Foraform® in one trial and Biomate® or Biomate + Cold-flo® in the second trial. In both trials, the silages were well preserved, but all were highly unstable in air during the first 3 to 4 weeks of the feed-out period. Foraform-treated silage was 2 to 6 degrees F cooler than its control, but Cold-flo-treated silage was 2 to 8 degrees F warmer during the first 10 days post-filling. Laboratory silo results showed that both control silages fermented extremely fast; however, inoculated silages had slightly lower pH and higher lactic acid values through …

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Effect Of Commercial Inoculants On Fermentation Of 1988 Silage Crops, K.K. Bolsen, A. Laytimi, S. Azimi, R.A. Hart, F. Niroomand, J. Bradford, L. Clare Jan 1989

Effect Of Commercial Inoculants On Fermentation Of 1988 Silage Crops, K.K. Bolsen, A. Laytimi, S. Azimi, R.A. Hart, F. Niroomand, J. Bradford, L. Clare

Kansas Agricultural Experiment Station Research Reports

We have measured silage fermentation dynamics in over 50 crops since the development of a 4 x 14 inch PVC pipe, laboratory-scale silo in 1984. In many of these experiments, our objective was to determine how inoculants or inoculant/enzyme combinations affected the rate and efficiency of the ensiling process. Twenty-five different inoculants have been tested over a wide range of ensiling conditions. Results show that the majority of silage inoculants available today are able to supply a high number of lactic acid bacteria (LAB) and to improve silage fermentation in most crops (KAES, Reports of Progress 494, 514, and 539). …

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Effect Of Foraform® On Fermentation Of Alfalfa, Corn, And Forage Sorghum Silages, K.K. Bolsen, A. Laytimi, A.D. Drysdale Jan 1989

Effect Of Foraform® On Fermentation Of Alfalfa, Corn, And Forage Sorghum Silages, K.K. Bolsen, A. Laytimi, A.D. Drysdale

Kansas Agricultural Experiment Station Research Reports

Foraform® was evaluated in four trials using alfalfa, corn, and two forage sorghums harvested in 1987 and ensiled in PVC laboratory silos. There was a dramatic crop by Foraform interaction, with Foraform delaying and restricting the fermentations, as expected, in alfalfa and corn. In both forage sorghum hybrids, although the ensiling process was delayed about 24 hours by the Foraform treatment, end-product silages had lower pH values and equal or higher lactic acid levels than untreated silages. Foraform was effective at both 60 to 90 F temperatures in alfalfa, with treated silages having lower lactic and acetic acids, ethanol, and …

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Dietary Influences On Pancreatic Amylase And Small Intestinal Disaccharidase Activities In Cattle, K.K. Kreikemeier, D.L. Harmon, K. Gross, C. Armendariz Jan 1989

Dietary Influences On Pancreatic Amylase And Small Intestinal Disaccharidase Activities In Cattle, K.K. Kreikemeier, D.L. Harmon, K. Gross, C. Armendariz

Kansas Agricultural Experiment Station Research Reports

Pancreatic α-amylase activity was 54% higher in cattle fed at twice maintenance energy than in cattle fed at maintenance and was 52% greater in hay-fed than grain-fed cattle. Increased pancreatic α-amylase activity probably represents increased secretion as well. α-amylase activity in small intestinal digesta was greater with increased energy intake and with hay feeding. Small intestine mucosal disaccharidase activities in cattle were unaffected by diet. Lactase activity was highest in the proximal segment of the small intestine and low in both mid and distal segments. Maltase and isomaltase activities were low in the duodenum, but increased toward the jejunum and …

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Influence Of Rumen Bypass Fat In Cattle Supplements On Forage Utilization, R.B. Hightshoe, R.C. Cochran, L.R. Corah, D.L. Harmon, E.S. Vanzant Jan 1989

Influence Of Rumen Bypass Fat In Cattle Supplements On Forage Utilization, R.B. Hightshoe, R.C. Cochran, L.R. Corah, D.L. Harmon, E.S. Vanzant

Kansas Agricultural Experiment Station Research Reports

Incorporation of rumen bypass fat into a supplement to be fed with low quality forage did not affect total dry matter digestibility or ruminal dry matter fill. Similarly, no difference in digestibility was observed among types (animal vs. plant) or levels (low vs. high) of lipids used in this study. Rumen bypass fat apparently avoids the negative impact on forage utilization seen with conventional fats.

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Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, S.H.M. Esmail, H. Hartadi, L.H. Harbers, John E. Shirley, J.D. Hoover, S. Azimi, L.W. Pfaff, K.K. Bolsen Jan 1989

Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, S.H.M. Esmail, H. Hartadi, L.H. Harbers, John E. Shirley, J.D. Hoover, S. Azimi, L.W. Pfaff, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

Interseeded grain sorghum and soybeans have been evaluated as a silage crop over a 3year period. In the first 2 years, maximum dry matter (DM) yields occurred at the late-dough stage of the grain sorghum, and interseeded silages had higher crude protein (CP) and acid detergent fiber contents than non-interseeded late-dough stage, grain sorghum control silages. In year 2, seeding grain sorghum and soybeans in alternating IS-inch rows increased DM yield, CP content, and the proportion of soybean plants in the mixture compared to drilled (6-inch spacing) interseeding. Digestibilities of most nutrients were similar in all silages; however, cattle fed …

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Impact Of Cash Settlement On Feeder Cattle Hedging Risk, J.R. Mintert, Ted C. Schroeder Jan 1989

Impact Of Cash Settlement On Feeder Cattle Hedging Risk, J.R. Mintert, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

One of the principal motivations for the introduction of cash settlement in feeder cattle futures contracts was to reduce basis risk. This study examined expected changes in hedging risk attributable to the adoption of cash settlement. The estimates of cash settlement futures hedging risks were generally small than estimates of hedging risks using the physical-delivery futures. The reduction in hedging risk was greatest for feeder steers meeting futures contract weight specifications, but reductions were also common for other weight classes and for heifers.

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Dietary Fat And Calcium Level Effect On Feedlot Performance And Carcass Merit In Steers, B. Bock, Robert T. Brandt Jr., D.L. Harmon Jan 1989

Dietary Fat And Calcium Level Effect On Feedlot Performance And Carcass Merit In Steers, B. Bock, Robert T. Brandt Jr., D.L. Harmon

Kansas Agricultural Experiment Station Research Reports

Feeding fat increased feed intake and average daily gain, but feed efficiency was not affected. Feeding high levels of calcium (.9%) had no overall effect, but may tend to increase intake when fed with diets that contain primarily vegetable fat or highly unsaturated fat products.

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Influence Of Plant Parts On In Vitro Dry Matter Disappearance Of Forage Sorghum Silages, J. White, K.K. Bolsen Jan 1989

Influence Of Plant Parts On In Vitro Dry Matter Disappearance Of Forage Sorghum Silages, J. White, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

Five mid- to late- season forage sorghum hybrids were used to plot the changes in silage in vitro dry matter disappearance (IVDMD) when their proportions of grain, leaf, sheath, and stalk were altered. The average IVDMD of the parts were: grain 76.9%, leaf 57.7%, sheath 52.7%, and stalk 60.8 percent. The grain proportion had a large positive effect on silage IVDMD dynamics, whereas the sheath plant part had a negative effect.

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Liver Fluke Infestation In Kansas Fed Slaughter Cattle, S.B. Laudert Jan 1989

Liver Fluke Infestation In Kansas Fed Slaughter Cattle, S.B. Laudert

Kansas Agricultural Experiment Station Research Reports

Feedlot cattle from 1,687 pens totaling 290,183 head were evaluated at slaughter for the presence of liver flukes. Overall, 4.92% of the cattle were found to be infected. Only 15.2% of all pens of cattle were found to be completely free of flukes. However, only 5.3% of the pens had greater than 15% of the cattle infested. Beef steers had a higher level of infestation (5.2%) than beef heifers (4.4%). Holstein steers had an overall infestation rate of 4.4%.

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Effect Of Liquamycin® And Syntabac Plus® On Gain And Health Of Stockers Purchased As Steers Or Bulls, F. Brazle, Gerry L. Kuhl Jan 1989

Effect Of Liquamycin® And Syntabac Plus® On Gain And Health Of Stockers Purchased As Steers Or Bulls, F. Brazle, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Steer calves gained faster (P<.001) and required fewer treatments per animal (P<.01) than newly castrated bull calves during a 29-day receiving period. Liquamycin® (LA-200) injection at arrival increased steer gains (P<.08) and reduced treatments required per animal (P<.08). The combined use of LA-2oo and Syntabac Plus®"¢ increased gains (P<.08) of newly castrated calves.

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