• J. L. Joshi
• G. S. Shai Prasanna
• Ajish Muraleedharan

Rice (Oryza sativa L.) belongs to family Poaceae and Chromosome number 2n = 2x = 24. Rice is a major staple food crop in the world and 90% of the rice is grown and consumed in south and southeast Asia. The thirty landraces which are subjected to study host plant resistance which were conserved at Department of Genetics and Plant Breeding, Faculty of Agriculture, Annamalai University. In the present study, the selected 30 landraces of rice were evaluated for identification of yellow stem borer (Scripophaga incertulas) resistance. Yellow Stem borers in the order Lepidoptera are widely prevalent and serious insect pests of rice. Host plant resistance is identified as the most effective way of stem borer management in various regions. 30 landraces of rice were screened for their reaction to stem borer. They are common and serious pests in Asian countries responsible for annual damages of 5-10 per cent of rice crops. Heavy infestation may cause yield loss up to 80 per cent. The symptoms of this pest is characterized by drying of central shoot known as ‘dead heart’ at vegetative stage. and ‘white ear’ at reproductive stage. Based on symptoms pest incidence and damage can be assessed. The study of host plant resistance resulted in identification resistant landraces that can be directly utilized for cultivation in stem borer prone areas or as a source of resistant parent in breeding programs or to identify the resistance genes in chromosomes of Landraces of rice for introgression into cultivated varieties.

Rice, yellow stem borer, resistance.

"FIELD EVALUATION FOR IDENTIFICATION YELLOW STEM BORER (SCIRPOPHAGA INCERTULAS WLK) RESISTANCE IN THIRTY LANDRACES OF RICE (ORYZA SATIVA L.)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.323-328, March-2019, Available :http://www.jetir.org/papers/JETIR1903O47.pdf

"FIELD EVALUATION FOR IDENTIFICATION YELLOW STEM BORER (SCIRPOPHAGA INCERTULAS WLK) RESISTANCE IN THIRTY LANDRACES OF RICE (ORYZA SATIVA L.)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp323-328, March-2019, Available at : http://www.jetir.org/papers/JETIR1903O47.pdf