Effect of some plant extracts of lamiaceae plants in controling Fusarium oxysporum f.sp. lycopersici on tomato plant in greenhouse

Abstract

The research was conducted in 2018-2019, in the greenhouse - Faculty  of Agriculture, Damascus University, to determine the effect Ethanol, Petroleum ether and Hexane extracts of oregano Origanum vulgare L, lavender Mill. Lavandula angustifolia, rosemary Rosmarinus officinalis L and Thyme Thymus syriacus (Lamiaceae), and carbendazim fungicide for controling Fusarium oxysporum f.sp. lycopersici on tomato plants (Lycopersicon esculentum Mill.) .

A concentration of 2 ml/200 ml water / pot ethanol oregano leaf extract as soil treatment on tomato plants lowered the incidence and severity diseases of F. oxysporum to 12.23 and 8.67% after 30 days from treatment respectively. Followed by ethanol lavender extract lowered the incidence and severity of  the diseas F. oxysporum to 16.75 and 12.69% after 30 days from treatment respectively. Where, the incidence and severity diseases in inoculated control  as it was, 83.33 and 76.41 % respectively. However, the ethanol extracts of rosemary and thyme gave the lower effect.  In the other hand, Petroleum ether extract gave moderate control to the fungus. In contrast, the hexane extracts of the tested plant gave the lowest effect. Irrigation of  the soil with concentration 500 ppm of Carbendazim fungicide gave superiority significant comperd with all treatment in the control the fungus

The results showed that the dry weight of tomato plants inoculated with fungus significant increased when the plants were irrigated with plant extracts and fungicide. Concentration of chlorophyll a (1.55 mg/g tissues ) and b (0.67 mg/g tissues) of tomato plants was highest in pots containing the negative control (un-inoculated control) and in pots treated with the plant extracts and fungicide. So, the ethanol and petroleum ether extracts of oregano, lavender, rosemary and thyme could be used to control the fungi