Lavender organic cultivation yield and essential oil can be improved by using bio-stimulants

Lavender is an aromatic-medicinal plant, cultivated in Greece and in Mediterranean basin in general. The aim of the current study was to investigate if the use of bio-stimulants could increase the yield of the flowering shoots and the essential oil content even from the establishment year. For the purposes of the study, in Microkastro Vojo Kozanis, lavender experimental field was established on November 2017 and the results refer to the experimentation years 2018 and 2019. The effect of four different formulations (bio-stimulants and foliar preparations; control, amalgerol 15,000 cc ha–1, millerplex 450 cc ha–1, sugarxpress 12,000 cc ha–1, in three equal applications) on flower yield, essential oil content and yield were studied in a completely randomized experimental design under five replicates. The bio-stimulants application produced significantly higher flower shoots and essential oil yield comparing with control. The use of millerplex resulted to higher essential oil yield in higher values than the reported in literature, while the use of 'amargerol' produced flowering shoots with stable essential oil content for both experimental years. Therefore, the use of the above mentioned bio-stimulants is suggested to be used from the establishment year and thereafter, while further investigation on essential oil quality should be considered. © 2020 Informa UK Limited, trading as Taylor & Francis Group

Could bio-stimulators affect flower, essential oil yield, and its composition in organic lavender (Lavandula angustifolia) cultivation?

Soil-climatic conditions of Greece and Mediterranean basin in general are favor for the development of aromatic-medicinal plants. A great aromatic-medicinal plant that is cultivated on a large scale in Greece and in Mediterranean basin in general for its essential oil is lavender. Lavender organic cultivation is facing a serious problem with Rhizoctonia and Fusarium fungal infections resulting in the most cases to the destruction of the cultivation. The aim of the current study was to investigate the effect of bio-stimulators to flower and essential oil yield and its composition. For the purposes of the study field experiments were established in Microkastro Vojo Kozanis (40°14′44.25″N, 21°30′25.87″E) in 2018 and 2019, using a complete randomized experimental design. There was investigated the effect of different treatments (i). control, (ii). amalgerol 15000 mL ha−1, (iii). millerplex450 ml ha−1, (iv). sugarXpress 12000 mL ha−1, in three equal applications) on flower, essential oil yield and composition under five replicates. The results refer to the sixth and seventh lavender’ growing year. It was found that flower (spike) yield was decreased by 50% at the second experimentation year while the use of the bio-stimulators had a statistically significant effect compared with control, indicating their positive effect. In essential oil content case, amalgerol treatment was found to have the same content for both growing years. Finally, the identified essential oil components were 48, and there were found many differences to the composition between the tested treatments. © 2020 Elsevier B.V

Lavender organic cultivation yield and essential oil can be improved by using bio-stimulants

Lavender is an aromatic-medicinal plant, cultivated in Greece and in Mediterranean basin in general. The aim of the current study was to investigate if the use of bio-stimulants could increase the yield of the flowering shoots and the essential oil content even from the establishment year. For the purposes of the study, in Microkastro Vojo Kozanis, lavender experimental field was established on November 2017 and the results refer to the experimentation years 2018 and 2019. The effect of four different formulations (bio-stimulants and foliar preparations; control, amalgerol 15,000 cc ha–1, millerplex 450 cc ha–1, sugarxpress 12,000 cc ha–1, in three equal applications) on flower yield, essential oil content and yield were studied in a completely randomized experimental design under five replicates. The bio-stimulants application produced significantly higher flower shoots and essential oil yield comparing with control. The use of millerplex resulted to higher essential oil yield in higher values than the reported in literature, while the use of 'amargerol' produced flowering shoots with stable essential oil content for both experimental years. Therefore, the use of the above mentioned bio-stimulants is suggested to be used from the establishment year and thereafter, while further investigation on essential oil quality should be considered