In this study, the virulence of six isolates of nematode
Heterodera schachtii Shmidt which had isolated from fields in
Syrian Governorates (Homs, Hamah, Idlib, Aleppo, Der-Azzoor and
Arraqqa), was compared on sugar beet in a greenhouse pot
experi
ment. Final populations of the nematode were calculated, RF
(Reproduction factor) of the nematode were calculated for every
isolate.
