EVALUATION OF RICE GERMPLASM AGAINST RICE ROOTKNOT NEMATODE (MELOIDOGYNE GRAMINICOLA)
H. B. NARASIMHAMURTHY* **AND H. RAVINDRA
*Department of Plant Pathology, College of Agriculture, University of Agricultural and Horticultural Science, Shivamogga-577204, Karnataka, India**Zonal Agricultural and Horticultural Research Station, University of Agricultural and Horticultural Science, Shivamogga-577204, Karnataka, India
Rice (Oryza sativa L.) is the important staple food for more than half of the world population and provides 60-70 per cent body calorie intake to the consumers. Rice is a supreme commodity to mankind, because rice is truly life, culture, tradition and a means of livelihood to millions. Of late, rice root-knot nematode Meloidogyne graminicola has become a serious menace in all type of rice growing situations in India. It causes yield loss varying between 17-30 per cent, in severe cases, up to 50 per cent. A glass house experiment was conducted during kharif-2013 at College of Agriculture, Navile, Shivamogga to evaluate 20 genotypes. The result reveal that the genotypes showed varying degrees of responses. Out of 20 genotypes, only one genotype KMP-179 was found to be highly resistant with least root-knot index (1.6), while, 4 genotypes viz., MAS-26, BR- 2665, MTU-1001 and KMP-194 were moderately resistant with root-knot indices between 2 and 3. However, 11 genotypes viz., KMP-175, MAS-946, KMP-149, IR-64, MTU1010, JGL-1798, KCP-1, KMP-153, Kadamba, KMP-169 and Rasi were found to be susceptible with root-knot indices varying between 3 and 4. The remaining 4 genotypes, KMP-148, KMP-128, KMP-105 and Thanu were highly susceptible.
Keywords: Rice, Root-knot nematode, Meloidogyne graminicola, Germplasm[Download]