A leaf roll virus control program in Idaho's seed potato areas     

Guy W. Bishop 《American Journal of Potato Research》1967,44(9):305-308

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Urea nitrogen for potatoes     

K. B. Tyler  O. A. Lorenz  F. H. Takatori  J. C. Bishop 《American Journal of Potato Research》1962,39(3):89-99

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Can scale-dependent landcover relationships explain canid community composition independent of intraguild occupancy?     

Corral  Lucia  Stuber  Erica F.  Frink  Teresa J.  Bishop  Andrew A.  Fontaine  Joseph J. 《Landscape Ecology》2022,37(1):249-266

Landscape Ecology - Niche theory is frequently used as a framework to integrate environmental variables and species interactions to describe species geographic distribution. Yet, the scale at which...  相似文献   

Recovery of photosynthetic capacity in Scots pine: a model analysis of forest plots with contrasting soil temperature     

Per-Erik Mellander  Johan Bergh  Tomas Lundmark  Kevin Bishop 《European Journal of Forest Research》2008,127(1):71-79

Both aboveground and belowground climate affects net primary production (NNP) and forest growth. Little is known about how above and belowground factors interact. The BIOMASS-model was tested to simulate photosynthetic recovery over a wide range of soil temperatures created by snow cover manipulations on tree-scale plots in a 20-year-old Scots pine stand in northern Sweden. The differences in timing of soil warming between the plots covered a span of two months. Carbon assimilation in needles, sap flow, needle water potential and climatic parameters were measured in the field. The simulations revealed that an early start of soil warming gave a relatively early photosynthetic recovery and a 7.5% increase of NPP. Late soil warming delayed the photosynthetic recovery and reduced the NPP by 13.7%. This indicated that soil temperature needed to be accounted for, as well as air temperature, when analysing photosynthetic recovery and NPP in boreal environment. The effects of differences in soil temperature were reflected in the simulated photosynthetic recovery. The model did not fully capture the delay of photosynthetic recovery caused by a late soil warming. It was possible to integrate the complexity of the soil climate effects into a threshold date for soil thaw, using sapflow measurements together with information about air temperature and a day degree sum, as long as water availability was not limiting water uptake by roots. Although a more realistic mechanism than that currently in BIOMASS is desirable as climate change shifts the typical patterns of interplay between air and soil temperature dynamics.  相似文献   

Reduction of potato damage during grading by radiant heating     

C. F. H. Bishop  A. J. Thorogood  T. Duran  Y. O. Devres 《Potato Research》2000,43(3):273-278

Summary The effect of using radiant heat to quickly warm potatoes and reduce damage in handling after cold storage was investigated. Two treatments were investigated: tubers dropped 350 mm with no radiant heat applied, and tubers dropped with radiant heat applied. Both treatments were compared with a control set of tubers which were taken directly out of store. The mean damage index per tuber was significantly reduced following radiant heat treatment although there were cultivar and size variations. The temperature profile under radiant heat was also measured which showed an increase in the outside flesh temperature of 8–12°C depending on tuber colour.  相似文献   

Influence of ivermectin and clorsulon treatment on productivity of a cow-calf herd on the southern Oregon coast.     

L G Rickard  G L Zimmerman  E P Hoberg  J K Bishop  R J Pettitt 《Veterinary parasitology》1992,41(1-2):45-55

The reproductive performance of beef cows and the weight gain of their calves was evaluated after oral administration of clorsulon or clorsulon in combination with the subcutaneous administration of ivermectin. One hundred and fifty pregnant cows harboring infections of Fasciola hepatica were assigned to one of three treatment groups: Group 1 comprising 50 unmedicated controls; Group 2, 50 cows treated with clorsulon orally at 7 mg kg-1; Group 3, 50 cows treated with clorsulon orally at 7 mg kg-1 and ivermectin subcutaneously at 200 micrograms kg-1. Weights and body condition scores of the cows were measured and fecal and blood samples were taken at trial initiation and days 158 and 270. Pregnancy status was also determined at day 270. Weights and body condition scores were measured for the calves at days 158 and 270. Adjusted 205 day weaning weight of the calves was calculated and analyzed for differences between treatment groups. Four sets of tracer calves were used periodically throughout the trial to monitor the helminth challenge to the herd. Both gastro-intestinal nematodes and liver flukes were transmitted to the tracer calves during the entire trial. Even in the face of continual helminth challenge, beef cows treated with combined clorsulon/ivermectin conceived approximately 2 weeks earlier than their untreated counterparts and their calves had better body condition scores and weights than untreated calves.  相似文献   

Use of embryo transfer to induce twinning in beef cattle: embryo survival rate, gestation length, birth weight and weaning weight of calves     

M E Davis  W R Harvey  M D Bishop  W W Gearheart 《Journal of animal science》1989,67(2):301-310

Experiments were conducted in 1985 and 1986 at the Eastern Ohio Resource Development Center, Belle Valley, to examine the feasibility of using embryo transfer to induce twinning and to examine the influence of twinning on traits of the cow and calf. Embryos were collected from a total of 14 superovulated Angus donors on two dates each in 1985 and 1986 and were transferred to Angus recipients. A total of 124 embryos were transferred to 79 recipients, with 43 (34.7%) calves born alive. Seven of 45 (15.6%) recipients implanted with two embryos produced twins. In no case did both halves of the 15 embryos that were split to produce identical twins and implanted in the same recipient survive to birth. Proportion of calves born alive did not differ among transfer codes 3 (nonsplit embryos from two different donors implanted in separate uterine horns of the same recipient), 6 (nonsplit embryos from one embryo flush implanted in separate uterine horns of the same recipient) and 7 (nonsplit embryos from two different donors implanted in the same uterine horn of one recipient). Surgical transfers tended to result in a higher proportion of embryos surviving to birth (.43 vs .21; P = .16) and a higher twinning rate (.29 vs .04; P = .36) than did nonsurgical transfers. Age of recipient did not influence embryo survival (P = .98) or twinning rate (P = .99). Gestation length was 5 d shorter (P less than .01) for twin calves than for singles. Singles were 9 kg heavier (P less than .01) at birth and 32 kg heavier (P less than .01) at weaning than twins. However, cows raising twins produced 108 kg (51%) more total weaning weight than did cows raising singles.  相似文献   

Epidemiologic observations on feline immunodeficiency virus and Toxoplasma gondii coinfection in cats in Baltimore, Md   总被引：5，自引：0，他引：5  

C J Witt  T R Moench  A M Gittelsohn  B D Bishop  J E Childs 《Journal of the American Veterinary Medical Association》1989,194(2):229-233

Five hundred eighty-five serum samples obtained between 1980 and 1981 from a diverse population of cats were tested by use of an indirect immunoperoxidase assay for antibodies to feline immunodeficiency virus (FIV). Results of 14 of the samples were positive (prevalence, 2.4%). The FIV-positive cats were markedly older than the overall population and frequently were coinfected (57%) with Toxoplasma gondii. The Toxoplasma titers of the FIV-positive cats were significantly (P less than 0.03) higher than those of the FIV-negative cats. The FIV-positive cats were not coinfected with FeLV. Our findings suggested that FIV-associated immunosuppression may be a factor in active Toxoplasma infection in adult cats.  相似文献   

Biochemical evaluation of the effects of storage on feline erythrocytes          下载免费PDF全文

J. A. Heinz  M. B. Pashmakova  C. R. Wilson  M. C. Johnson  H. M. Minnard  M. A. Bishop  J. W. Barr 《The Journal of small animal practice》2016,57(11):637-643

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Enhancing knowledge and awareness of biosecurity practices for control of African swine fever among smallholder pig farmers in four districts along the Kenya–Uganda border     

Noelina Nantima  Jocelyn Davies  Michel Dione  Michael Ocaido  Edward Okoth  Anthony Mugisha  Richard Bishop 《Tropical animal health and production》2016,48(4):727-734

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