الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 158 |  |  |
| | | from | 158 | | |
Abstract
The study aims to find alternative ways to control some soil borne fungal diseases of tomato plants. Fusarium oxysporum and Rhizoctonia solani the causing agents of wilt and damping off diseases, respectively, were isolated from the rhizosphere of tomato plants from different sites of Dakahlia governorate , Egypt, then determine the most pathogenic isolates. Eighteen commercial essential oils were screened against the two pathogens then determine the most essential oils have antifungal activity and it was found that clove and lemongrass oils showed the highest antifungal activity against Fusarium oxysporum and Rhizoctonia solani. Also the antagonistic effect of Trichoderma harzianum were studied against Fusarium oxysporum and Rhizoctonia solani invitro. The study also include the greenhouse experiments in which the application of the studied treasatments ( clove oil, lemongrass oil, Trichoderma harzianum, and their combinations) by two methods (soaking and drenching) to demonstrate the effect of the treatments on the development of wilt and damping off diseases on tomato plant. The result showed that the application of combination of clove oil , lemongrass oil and Trichoderma harzianum had the potential for improving plant resistance against the infection of tomato plants with Fusarium oxysporum and Fusarium oxysporum.