Screening of available germplasm lines of ridge gourd against root-knot nematode

Abstract

The initial root-knot nematode population in soil was 1000 J2 /pot and six weeks after inoculation, the nematode population of susceptible lines was lower than the highly susceptible lines. The germplasm lines like Punjab sadabahar, RG-113, Pusa nasdar, Solapur local, RG-109, MHRG-7, RG-111, Kaveri, Vaishali, Krishna-51 and BSS-1036 were found to be susceptible to root-knot nematode. Remaining all germplasm lines were found to be highly susceptible to root-knot nematode. The number of root galls/egg masses recorded in highly susceptible lines ranged from 107.67 (Hare-1) to 161.33 (RG-116) per plant. The gall index recorded in these lines was 5.00/plant. The number of root galls/egg masses recorded in susceptible lines ranged from 45.67 (MHRG-7) to 90.67 (BSS-1036) per plant. The gall index recorded in these lines was 4.00 per plant. The susceptible germplasm lines like, Punjab sadabahar, RG-113, Pusa nasdar, Solapur local, RG-109, MHRG-7, RG-111, Kaveri, Vaishali, Krishna-51 and BSS-1036 recorded the multiplication factor of 2.11, 2.18,2.07, 2.15, 2.24, 2.03, 2.54, 2.17, 2.10, 2.20 and 2.70 respectively.