Abstract
Two consecutive field trials (2019 and 2020) were conducted to investigate the effect of foliar spraying of algae and royal jelly extracts on growth, essential oil content and composition of lemon verbena (Aloysia Citriodora) plant. Three concentrations of algae extract (0, 0.5 and 1 cm3L−1) and three concentrations of royal jelly (0, 1 and 2 gL−1) were used. All algae and royal jelly treatments positively impacted growth characters of lemon verbena (Aloysia Citriodora) plant viz, plant height, fresh and dry weights of herb and essential oil contents in both harvests during the two seasons. Plants sprayed with 0.5 cm3L−1 algae and 1 gL−1 royal jelly extracts produced the highest herb fresh and dry weights and essential oil contents. D-Limonene percent in the essential oil varied from 21.4 to the maximum of 25.9 % when plants were sprayed with 1 cm3L−1 of algae + 1 gL−1 of RJ. Geranial and neral maximally enhanced by 1 gL−1 without algae spraying which recorded 12.5 and 9.8 % respectively.
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