Nanoformulations based on lavender (Lavandula x inermedia) in suppression of red flour beetle (Tribolium castaneum Herbst)

Danas se u poljoprivredi sve više ţeli potaknuti upotreba ekološki prihvatljivih proizvoda za suzbijanje neţeljenih vrsta u samom poljoprivrednom proizvodu. Cilj istraţivanja je utvrditi učinkovitost eteričnog ulja Lavadula x intermedia u suzbijanju odraslog stadija Tribolium castaneum. U pokusu su pripremljene dvije koncentracije, nanoemulzija 5% i 15%, koje su sadrţavale: 5% ulja lavandina; 10% emulgatora Tween®80 i 85% vode (5% NF), odnosno 15% ulja lavandina; 5% emulgatora Tween®80 i 80% vode (15% NF). Emulzija (oznake F) s kojom je usporeĎivana djelotvornost nanoemulzije pripravljena je u koncentraciji s 15% ulja lavandina. Pokus je proveden testom akutne toksičnosti i apliciranjem formulacije na zrno pšenice. Najveći mortalitet zabiljeţen je direktnim apliciranjem formulacija F i NFpri višoj koncentraciji (15% ulja lavandina) na štetnika, nakon 24 h mortalitet je iznosio 92,5%, dok rezultati u testu sa pšenicom nisu pokazivali insekticidno djelovanje. IzmeĎu formulacija nije bilo statistički značajnih razlika u djelotvornosti.Today, in agriculture is increasingly encouragement of usage of environmentally friendly products to combat unwanted species in the agricultural product itself. The aim of the study was to determine the effectiveness of Lavadula x intermedia essential oil in controlling the adult stage of Tribolium castaneum. In the experiment, two concentrations were prepared, nanoemulsions 5% and 15%, which contained: 5% lavender oil; 10% Tween®80 emulsifier and 85% water (5% NF) and 15% lavandin oil, respectively; 5% Tween®80 emulsifier and 80% water (15% NF). The emulsion (labeled F) with which the nanoemulsion efficiency was compared was prepared in a concentration of 15% lavandin oil. The experiment was performed by the acute test and applying the formulation to the wheat grain. The highest mortality was recorded by direct application of the formulation F and NF at the higher concentration (15% of lavender oil), after 24 h the mortality was 92.5%, while the results from the test in wheat did not show insecticidal activity. There was no statistical differences between tested formulation