RESPONSE OF SOME GARDEN PLANTS TO FOLIAR SPRAYING WITH SOME NATURAL EXTRACTS

Document Type : Original Article

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Botanical Garden Research Department, Horticulture Research Institute, ARC, Giza, Egypt

Abstract

Two Hibiscus species namely Hibiscus malvaviscus L. and Hibiscus rosa-sinensis L. received foliar spraying of some natural extracts namely Moringa, liquorice, and fenugreek extracts each at 0.25 to 0.75% in the 2021-2022 and 2022/2023 seasons. Some growth aspects, namely plant height and number of branches, plant and root fresh and dry weights, stem girth, and leaf area were measured. Besides, plant pigments as well as the foliar content of N, P were determined in both plants.
Moringa, liquorice, and fenugreek extracts, in descending order, improved vegetative growth, leaf pigments, and N, P and K content. Moreover, these plant extract-related effects were concentration-dependent, with the best results achieved with spraying the two Hibiscus species with 0.75% of the extracts. The data obtained in both seasons showed that foliar spraying of Hibiscus malvaviscus L. and Hibiscus rosa-sinensis L. with moringa extract (0.75 %) resulted in the best plant height and number of branches, plant and root fresh and dry weights, stem diameter, and leaf area, in addition to higher concentrations of total chlorophylls, total carotenoids, N, P, and K of leaves,

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