الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Turf grasses play an important role in improving the surrounding environment and quality of life. Soil-borne diseases are among the most important obstacles that impede the production of sod and ornamental plants. This study was carried out in the greenhouse of the Department of Diseases of Ornamental, Medicinal and Aromatic Plants, Plant Pathology Research Institute, Agricultural Research Center, Giza. Its main objective was to study the possibility of reducing the fungal infection of paspalm (Paspalum vaginatum) and Bermuda grasses as the most important landscaping plants in Egypt, by using some biological and natural methods compared to the chemical methods used in combating root rot diseases of landscapes in Egypt. The results obtained can be summarized as follows: 1. Survey for root rot diseases of paspalum and Bermuda plants was conducted during, 2016 and 2017 seasons in several gardens of Cairo, Alexandria and Giza . The survey showed a difference in the frequency of the isolated fungi. In general Fusarium oxysporum, Fusarium semitectum, Pythium splendens, Rhizoctonia solani, and Macrophomina phaseolina were the most frequent fungi obtained.2. The pathogenicity test was done for the most frequent five isolated fungi, i.e Fusarium oxysporum, Fusarium semitectum, Pythium splendens, Rhizoctonia solani, and Macrophomina phaseolina. The pathogenicity test showed that there was a variation in the percentages of infection depending on the causal pathogenic fungus, whereas Fusarium oxysporum, Fusarium semitectum caused the highest percentage of infection, followed by Pythium splendens and Rhizoctonia solani. The lowest percentage was record for Macrophomina phaseolina.3. The tested fungi were able to grow over a wide range of temperatures from 10 to 30ºC except for M. phaseolina and R. solani which were able to grow between.