Influence of soil herbicides on the biometric indices of lavender

Desislava Angelova

Abstract: During the period 2011-2013 at the experimental field of the Institute for roses and aromatic plants – Kazanlak was studied the impact of isoxaflutole (Merlin 750 WG), oxadiargyl (Raft 400 SC) and imazamox (Pulsar 40) on the biometrics indices (height, diameter and number of inflorescences) of lavender variety Hemus. It was found that the studied herbicides to have not negative effect on the height, diameter and number of plants inflorescences. In individual years lavender with herbicides exceeded the untreated control by an average of 6 to 8 cm. The plants diameter of the control variant was 6 to 11 cm smaller than the diameter of the treated plants. The number of inflorescences in herbicide variants ranges from 339 to 349, exceeding the control by 29 to 47. The differences between the variants with respect to the three signs were statistically proven for Gd = 5% and Gd =1% for oxadiargyl and imazamox. For the studied period, the yield of color in treated plants is 29-50% higher than untreated plants. The best results are the application of oxadiargil and imazamox. The treated plants show a strong positive correlation between fresh inflorescence yield and plant diameter and inflorescence length.

Keywords: herbicides; lavender; number of inflorescences; plant height

Date published: 2019-10-31