DETERMINATION OF THE INTERACTION BETWEEN FUSARIUM CROWN - ROOT ROT DISEASE AND ROOT-KNOT NEMATODE ON TOMATO GEN OTYPES

摘要

Fusarium crown and root rot disease (Fusarium oxysporum f.sp. radicis-lycoperisici-FORL) causes significant yield losses in greenhouses tomato cultivation. The present study was conducted to determine the interaction between FORL and root-knot nematode (Meloidogyne incognita), in FORL resistant tomato genotypes (AL-4, AL-9, AL-21) identified with PCR technique (SCARFrl). A synergistic interaction occurred between pathogens in tomato lines in inoculations that were conducted in concomitant (fungus + nematode) and sequential (nematode + fungus after 15 days / N + 15 days F and fungus + nematode after 15 days / F + N 15 days) inoculations to determine FORL and rootknot interactions. In the presence of M. incognita (1000 juveniles plant/ pot), symptoms such as severe wilt and browning in vascular system were observed in the plants. It was determined that in concomitant inoculations of FORL and M. incognita (91.67%, 86.17%, 94.47%) and in sequential N+15 days F (83.37%, 75.0%, 81.67%) and F+15 days N (68.33%, 56.67%, 61.66%) inoculations, wilt symptoms and disease severity occurred earlier and more severe. It was found that the tomato genotypes lost their resistance against FORL disease in tomato genotypes that were recorded as resistant to FORL disease in molecular and classical tests of pure fungi inoculations.