THE INFLUENCE OF SOIL-BORNE PATHOGENS ON PLANT EMERGENCE IN DIFFERENT VEGETABLE SPECIES DEPENDING ON SOIL SAMPLE AND PREVIOUS CROP

Rezumat

The fungi Pythium debaryanum, Phytophthora parasitica, Rhizoctonia solani and Fusarium spp. are some of the most destructive soil-borne pathogens, causing significant damage to a wide range of vegetable species. These species were identified in 7 soil samples from different areas of Romania. The “trap plants” method was used to detect the presence of soil-borne pathogens. Seeds from 4 vegetable species (tomatoes, peppers, eggplants and melons) were sown in the tested soil samples. Every 2 days, the emergence dynamics and the appearance and evolution of the attack of the mentioned pathogens were monitored and the frequency of rotten seeds and “fallen seedlings” were calculated. Tomatoes, peppers, eggplants and melons plants emerged best in soil samples 6 (Dolj County) where the predecessor plant was cauliflower, with an average of 94 %, 3 (Neamț County) also with cauliflower as the predecessor plant, with an average of 74% and sample 5 (Bucharest / Ilfov County) with eggplant as the predecessor plant with an average of 72 %.