Evaluation of Rice Germplasm Against Rice Root-Knot Nematode (Meloidogyne Graminicola)

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, BR2665, MTU-1001 and KMP-194 were moderately resistant with root-knot indices between 2 and 3. However, 11 genotypes viz., KMP-175, MAS946, 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.