1Ph. D. Scholar, Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore-641003, Tamil Nadu, India
2Associate Professor (Agricultural Entomology), Horticultural College and Research Institute for Women (TNAU), Navalur Kuttapattu, Trichy-620 027, Tamil Nadu, India
3Professor and Head (Plant Breeding and Genetics), Anbil Dharmalingam Agricultural College and Research Institute (TNAU), Navalur Kuttapattu, Trichy-620 027, Tamil Nadu, India
*E-Mail: sound73insect@gmail.com
Online published on 2 July, 2019.
Rice yellow stem borer (Scirpophaga incertulas W), a monophagous pest, is the most destructive pest causing 3 to 95% yield losses in India. Though it accounts for 50 per cent of insecticides used in rice fields, their typical internal feeding behaviour necessitates other management options. In the present study, evaluation of various wild rice lines-wild rice magic population (WRM), derivative of crosses from six species viz., Oryza rufipogon, O.nivara, O.meridionalis, O.glumaepatula, O.barthi, O.gaberrima, O.longistaminata and O.sativa has been carried out. The results of field screening carried out in 38 wild rice introgressed lines, the entries WRM 2, WRM 6, WRM 10, WRM 12, WRM 14, WRM 43, WRM 44, WRM 45 and WRM 76 were moderately resistant to yellow stem borer. The morphological characters of the entries were recorded and correlated with stem borer damage. It revealed a significant negative correlation for plant height and top internode length for their resistant to yellow stem borer.
Rice, yellow stem borer, field screening, mechanism of resistance
