Vol. 11, Special Issue 9 (2022)

Author(s):
Subhrasree Mishra, Byomakesh Dash and Dhirendra Kumar Nayak

Abstract:
Screening of some common paddy cultivars of Odisha were evaluated against rice root-knot nematode Meloidogyne graminicola, in green house condition in Department of Nematology, OUAT, Bhubaneswar, Odisha, replicated thrice in Complete Randomized Design (CRD) during kharif seasons of 2019 and 2020. One hundred ten paddy varieties were tested for the nematode in pot culture condition then inoculum density and root-galling severity of M. graminicola in terms of different plant growth parameters were classified as per root-knot index (0-5 scale). Reduction in length and weight of both the roots & shoots in most of the common varieties like Lalat, Naveen, Khandagiri, Udayagiri etc found highly susceptible. However, 9 varieties namely Vanaprava, Manik, Abhisek, Pratikhya, BAS-63, BBSR Local-2, Udaya, FR-13-A, Keshari were found moderately resistance with root-knot index-2. The most of the popular varieties of Odisha like Narendra, CR-1014, Swarna sub-1, Lunishree, Vandana, Panidhan etc were shown to be susceptible against the nematode with low growth rate due to improper nutrient flows in post-nematode infestation. No varieties were observed highly resistance for the nematode during the investigation.