All living organisms have their own method for getting through the winter period of dormancy. Some accumulate layers of fat under their skin, some retreat underground or to other sheltered locations, and others cope with this inhospitable period in a state developed specifically for the purpose. Naturally it is not only plants and animals that prepare for winter: humans do so too. We collect firewood or fill our strategic gas reserves. And farmers perform maintenance work on their machinery, for example making sure that the pumps, filter housings, and spray nozzles of spraying equipment are in order. What tasks are there in plant protection?
Environmental and food safety regulations of European Union limited the usage of copper containing fungicides and bactericides. They limited the amount of copper that could be applied in one year and in one hectare. However they assigned the right of decision on the introduction and the extent of limitation to the national authorities. Individual countries e.g. Austria limited the amount of copper (metal) to 2 kgs/ha/year, the Netherlands did to 0.5 kg/ha/year from the former 8 kg value. It means that farmers could not control bacterial and fungal plant diseases efficiently.
This problem could be solved by the application of adjuvant that could increase the efficacy of copper containing products. These adjuvants consist of fat and oil derivatives.