Abstract

The study was conducted in covering at Al-Qassim Green University Agriculture faculty the Horticulture and Landscape Engineering Department. The experiment was carried out on 11/17/2022, where olive seedlings of the Manzilillo variety were transferred from plastic bags to anvils, and after treatment with dry yeast extract, microorganisms, and seaweed extract at different concentrations, the best results were found. The vegetative traits, which include stem length/number of branches, number of leaves, and antioxidants had a significant effect. The best results were at a concentration of 15 g/L for the yeast extract and at a concentration of 15 mL/for the marine algae extract. The interaction between the two extracts showed that they had a significant effect on the shoot and the antioxidant value of the xenon plant. Manzillo. The results also showed that treatment with a 15 g/L concentration of mushroom extracts showed resistance to Verticillium wilt and scab diseases.