Sterility treatment and oestrus synchronization with EnzaprostR (PGF 2alpha) in cattle.     

J Becze  I Perjés  G S K?rm?czy  J Szeitli 《Acta veterinaria Academiae Scientiarum Hungaricae》1976,26(4):455-463

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Comparative electron microscopic study of mycobacteria]     

A V Kulikovski? 《Veterinariia》1979,(2):29-33

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Evaluation of bacterial content of liver and spleen samples sent in for bacteriological examination     

G Stuker  R Sch?llibaum  R Schweizer 《Schweizer Archiv für Tierheilkunde》1977,119(11):469-472

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The pathogenetic significance of Erysipelothrix rhusiopathiae in the acute and chronic form of erysipeloid arthritis]     

L C Schulz  W Drommer  H Ehard  B Hertrampf  W Leibold  C Messow  J Mumme  G Trautwein  S Uebersch?r  R Weiss  J Winkelmann 《DTW. Deutsche tier?rztliche Wochenschrift》1977,84(3):107-111

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Extrapolation of acid-base parameters in physiology. Carbon dioxide changes in stored blood     

P F J?rgensen 《Acta veterinaria Scandinavica》1981,22(3-4):597-599

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Study of the variability of Cl. perfringens type D]     

D V Nachkebiia  B V Partsvaniia  A V Kulikovski? 《Veterinariia》1977,(10):60-62

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Outbreaks of early-season trichostrongylosis in calves in Denmark     

P Nansen  J Gr?nvold  R J J?rgensen  S A Henriksen  J Foldager  K Sejrsen 《Veterinary parasitology》1989,32(2-3):199-211

This paper describes clinically manifest infections occurring as early as June and early July in first-season grazing calves in Denmark during the period 1972-1987. Two severe outbreaks in 1976, included in our experiments, were studied in detail. Herbage infectivity was particularly high in grass tufts surrounding cow pats that were present in high numbers around the time of turnout. It is hypothesized that the preceding extremely dry summer followed by a hard winter had indirectly retarded degradation of dung pats and thereby favoured the overwintering of the larval populations in the dung reservoirs. In a third experiment, conducted in the same year, the epidemiological pattern was more normal; presumably due to artificial irrigation of the pasture during the drought. Early-season cases that were recorded in 1980 and 1987 could possibly be related to cold winters and/or very early turnout. The findings are discussed in the light of ecological factors responsible for the breakdown of cow pats. The clinical implications are seen in relation to current control methods.  相似文献   

Drug therapy of intestinal coccidiosis of the rabbit with formosulfathiazol     

G L?mmler  U Dürr 《Berliner und Münchener tier?rztliche Wochenschrift》1967,80(23):455-458

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Development and reproduction of Adalia bipunctata (Coleoptera: Coccinellidae) on eggs of Ephestia kuehniella (Lepidoptera: Phycitidae) and pollen     

De Clercq P  Bonte M  Van Speybroeck K  Bolckmans K  Deforce K 《Pest management science》2005,61(11):1129-1132

Due to growing criticism over the use of non-indigenous coccinellids, the two-spot ladybird, Adalia bipunctata (L.), has enjoyed increasing attention for aphid biocontrol in Europe. In the current study, eggs of the Mediterranean flour moth, Ephestia kuehniella Zeller, whether or not supplemented with bee pollen, were evaluated as a factitious food for larvae and adults of A. bipunctata. The predator showed slower larval development and lower survival when reared on live pea aphids, Acyrthosiphon pisum (Harris), than on E. kuehniella eggs. Survival on gamma-irradiated eggs of E. kuehniella was superior to that on frozen flour moth eggs, but other developmental characteristics were similar. Adults of A. bipunctata reared on Ac. pisum were only half as fecund as those offered irradiated or frozen E. kuehniella eggs, but egg hatch was markedly better on live aphids than on flour moth eggs (61 versus 20-27%, respectively). However, when a diet of flour moth eggs was supplemented with frozen moist bee pollen, egg hatch of A. bipunctata was equally as good as on live aphids. Supplementing flour moth eggs with dry pollen did not yield satisfactory results. Only 10% of larvae reached adulthood on moist bee pollen alone and resulting adults weighed less than half as much as those obtained on flour moth eggs. Our findings indicate that A. bipunctata is able to compensate for a suboptimal diet of animal prey by supplementary feeding on flower pollen. It is concluded that pollinivory may be a crucial trait for both the rearing of this natural enemy and its use in biological control programmes.  相似文献   

Conduciveness of different soilless growing media to <Emphasis Type="Italic">Pythium</Emphasis> root and crown rot of cucumber under near-commercial conditions     

Dirk?Jan?van?der? GaagEmail author  Gerrit?Wever 《European journal of plant pathology / European Foundation for Plant Pathology》2005,112(1):31-41

Substrates made from rockwool, coir dust, pumice and perlite were compared for conduciveness to Pythium root and crown rot in cucumber under near-commercial conditions. Rockwool slabs of 7 cm height were more conducive to the Pythium disease than coir dust slabs, pumice or perlite under these conditions. Temperature, oxygen concentration and water content were determined in the substrates to explain differences in conduciveness between the inorganic substrates rockwool, pumice and perlite by differences in the physical conditions. Temperature and oxygen concentration could not explain the differences but the higher disease level on rockwool was associated with a much higher water content of this substrate as compared to coir dust, pumice and perlite. Increasing the height of the substrate from 7 to 14 cm greatly decreased the percentage of diseased plants due to the Pythium disease on rockwool but had no effect on the level of disease on perlite when the substrate had been infested 4 cm below the planting hole. This difference in response in substrate height between rockwool and perlite could be explained by a much larger decrease in water content with substrate height in the rockwool than in the perlite substrate. Temperature in the substrates were above 30 °C for more than 6 h on sunny days in June and reached maximum values of 35 °C or more. These temperatures are highly favourable for the pathogen P. aphanidermatum but will have adverse effects on most biocontrol strains.  相似文献