During the period 2014 – 2015 the herbicidal effect and the selectivity of isoxaflutole (Merlin 750 WG), oxadiargyl (Raft 400 SC), imazamox (Pulsar 40) and flumioxazine (Pledge 50 VP) were studied on lavender fields, Hemus and Jubilejna varieties.
The present work focuses on the influence of low doses of the applied preparations on the yield and composition of the essential oil compared with untreated control.
The results of two-year studies show that the treated variants have a higher yield on average of 0.7-1.6 kg / dka.
The odoriferous ingredients range in the limits: linalyl acetate (20.0 – 38.6 %); linalool (20.6 – 46.2 %); lavandulyl acetate (1.9 – 5.9 %); 1,8 cineole (0,4 – 4,9 %) and camphor (0,2 – 0,6 %).
Applying oxidiarigil results in greater changes in the composition of the Jubilejna variety, whereas the Hemus variety has the most influence by isoxaflutole.
Keywords: Lavandula angustifolia Mill, varieties, herbicides, essential oil composition