Biologically Active Extracts from Different Medicinal Plants Tested as Potential Additives against Bee Pathogens.

Honey bees () perform pollination service for many agricultural crops and contribute to the global economy in agriculture and bee products. However, honey bee health is an ongoing concern, as illustrated by persistent local population decline, caused by some severe bee diseases (e.g., nosemosis, AFB, EFB, chalkbrood) Three natural recipes are in development based on the bioactive compounds of different plants extract ( and ), characterised by HPLC-PDA. The antimicrobial activity of these recipes was tested in vitro against and in vivo against A mix of 20% blueberry, 40% absinthium, 10% oakmoss, 10% oregano, 10% Brewers Gold hops, 5% bay laurel and 5% anise hyssop extract showed the strongest antibacterial and antifungal activity. Combing several highly active plant extracts might be an alternative treatment against bee-disease-associated parasites and pathogens, in particular to replace synthetic antibiotics.