A controlled field experiment was performed in the year 2003 with 3 groups of each 20 first season grazing cattle. The efficacy of a biological (Duddingtonia flagrans) and an anthelmintic control strategy (morantel sustained release trilaminate bolus) against gastrointestinal nematodes (GIN) was investigated under unusually dry and warm meteorological conditions. The external conditions resulted in a substantial decrease of the infection risk on the experimental pastures, caused by direct (reduced migration of infective stages onto pasture, increased mortality rate) and indirect (reduced stocking rate, supplementory feeding) factors. Under these circumstances neither the chemical nor the biological strategy was necessary with respect to an additional limitation of the GIN infections. Largely unaffected by the parasite infections, the calves of the Duddingtonia, bolus and control group showed average daily weight gains of 688, 678 and 676 g respectively. The efficacy of D. flagrans against infective GIN larvae was demonstrated in coprocultures, performed at monthly intervals, showing a developmental rate of infective larvae of only 25 % compared to 83 % in the control group. Furthermore, during the final period of the experiment, the infection pressure on the pastures grazed by Duddingtonia-treated calves was approximately 90 % lower compared with the control group. In the context with data from various international studies the detection of D. flagrans in a soil sample of Switzerland is suggesting an ubiquitous occurrence of this species.
Herholz C., Siegwart J., Bruckmaier R.M., Rytz E., Lamon I., Muhr M. und Stirnimann R.
In both sport and alternative agriculture, horses are once again being used as draught animals. Efficient power transmission plays an important role in the wellbeing of draught horses.
A study by Vetsuisse shows that the outdoor veal calf concept reduces antibiotic consumption in calf fattening by 80%. AGRIDEA has examined the economic viability of outdoor veal calf production and concludes that it cannot compete with conventional veal calf fattening.
In contrast to pigs, dairy cattle are as yet rarely fed protein-reduced diets. Studies show that there is also potential for protein savings in cattle, and thus for reducing ammonia emissions.