In this study, we focused on the content of beta-acids in various hop genotypes from the SIHRB breeding program, with the aim to identify potentially interesting cultivars for producing beta-acids which potential use is possible for varroa suppression on bees. For this reason, we selected 31 samples during the technological maturity and determined alpha- and beta-acids, as well as the content of essential oil. Among the genotypes we found five breeding lines where beta-acids content was over 6%.
COBISS.SI-ID: 760204
Our work suggests that mechanism of HBA action may not be through the haemolimph and tissues ingested by a mite but may be either contact-toxic to Varroa or may stimulate bees into performing allogrooming which is one of the successful mechanisms of Varroa mite resistance in bee colonies. This preliminary study is a stepping stone for further research on toxicity, suitable concentrations and applications of HBA as natural alternatives of suppression of Varroa in the future.
COBISS.SI-ID: 5582952