A quantitative and qualitative assessment of sugar beet genotype resistance to root-knot nematode, .

Sugar beet productivity is highly constrained by the root-knot nematode (RKN) . Eight sugar beet genotypes were screened under greenhouse conditions for their susceptibility to according to an adapted quantitative scheme for assignment Canto-Saenz's host suitability (resistance) designations (AQSCS). Besides, the degree of susceptibility or tolerance of the examined genotypes was recorded by the modified host-parasite index (MHPI) scale based on yield performance.