Investigations on the resistance of some precessing tomato varieties to root-knot nematodes (meloidogyne spp.)

This study was conducted during 2004-2005 as field study in the field ofAgricultural Faculty, Investigation and Application Farm, and as pot study in theclimatized room under controlled conditions at Plant Protection Department. Themain material of experiment consisted of Meloidogyne incognita (Kafoid & White,1919) Chitwood,1949 infected soil and totally 10 processing tomato varieties, ofwhich 9 were resistant and 1 was sensitive to root-knot nematodes. Plant roots gallwere investigated according to Zeck (1971) 0-10 scale. In 2004 field experiment,NDM-447 (9.50) tomato variety gave highest gall index. On the other hand, therewere not any galls observed in the roots of NDM-978, NDM-344, CXD-222 andCXD-179 varieties. In 2005 field experiment NDM-447 (8.10) tomato variety gavethe highest gall index. On the other hand, there were not any galls observed in theroots of NDN-447 NBT, NDM-978, CXD-222, NUN-6109 and CXD-179 varieties.In the pot experiment, the highest gall index was determined on the sensitive varietyRio Grande (7.80). On the other hand, there were not any galls observed in the rootsof NDM-978, NDM-344, CXD-222 and CXD-179 varieties. When three experimentswere evaluated together, there were not any galls observed in the roots of NDM-978,CXD-222 and CXD-179 varieties, so these varieties are thought to be resistant toMeloidogyne incognita?s population in Aydın.