author(s)
HS Buttar, NK Dhillon, Sukhjeet Kaur, RK Dhall and Anupam

abstract
Cucumber (Cucumis sativus) is widely grown in open as well as in protected cultivation in Punjab. Among phytonematodes, the genus Meloidogyne, popularly known as root-knot nematode is an important constraint in production of cucumber. Use of resistant cultivar is an important measure for managing root knot nematode as compared to the other management strategies. Of the thirty genotypes, twenty eight genotypes were found to be susceptible or highly susceptible against Meloidogyne incognita. Genotype PBRK3 was found to be moderately resistant and one genotype Pant Khira was found to be moderately susceptible. Plant height was also affected by the infestation of M. incognita in different genotypes and significant decrease was observed as compared to control. In the case of highly susceptible cultivars, the reductions in yield parameters were maximum, whereas the reductions in moderately resistant and moderately susceptible cultivars were found to be minimum. Minimum percent reduction in height was found in PBRK 3 (4.54 percent) over control and 7070 cucumber genotype showed maximum reduction in height over control of 75.68 percent.