[en] The long-term harmful effects of chemical pesticides are one of the major controversies these days. Following the objective of reducing the use of these products without decreasing crop yield, essential oils (EOs) are a prime candidate for biocontrol. However, high volatility of EOs begets a challenge: increasing the duration of efficient activity of EOs.
In this work, an innovative green matrix for essential oil retention is proposed. Indeed, glycerol carbonate surface-modified dendrimers (GDs) have shown their ability to encapsulate some metallic complexes and organic compounds. As a consequence, the final goal is to produce an efficient biosourced herbicide based on a glycerodendrimer - essential oil combination.
Cymbopogon winterianus Jowitt and Cinnamomum zeylanicum Blume essential oils have been chosen for their herbicide properties. The total retention rate and a quantification of the main compounds was determined by dynamic headspace gas chromatography coupled with mass spectrometry. Results show that dendrimers encapsulate essential oils with some efficiency, which is influenced by dendrimer structure, size, concentration and stirring duration.
Furthermore, interactions between GDs and EOs was studied by nuclear magnetic resonance spectrometry. Parallelly, efficiency of created products will be controlled by analyzing the inhibition of seed germination and the one of new leaves of Arabidopsis Thaliania (L.) Heynh growing.
The talk will present the optimization of the EOs retention by dendrimers, their relationships and their efficiency as bisourced herbicide.
