1Department of Entomology, Acharya Narendra Deva University of Agriculture and Technology, Ayodhya, 224229, Uttar Pradesh, India
2Department of Entomology & Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India
3Department of Entomology, Agriculture University, Jodhpur, 342304, Rajasthan, India
*Email: krsharma.ento@nduat.org (corresponding author): Orcid Id 0000-0002-3646-3256
Online published on 8 August, 2025.
The response of rice genotypes to yellow stem borer Scirpophaga incertulas (Walker) infestation under natural climatic conditions was evaluated during kharif 2018-19 and 2019-20 at BHU, Varanasi. Findings revealed that deadhearts and white earheads caused by S. incertulas (Walker) varied significantly, indicating the presence of resistance-susceptibility. The dead hearts was significantly lower in resistant genotypes BRRI DHAN-64 (1.49%) and IR 82475-110-2-2-1-2 (2.00%). The susceptible TN1 (17.45%), Swarna (14.98%), and IR-92960-75-1-3 (14.58%) had the highest amount of deadhearts. The least white earheads was recorded in IR82475-110-2-2-1-2 (1.16%) and AKSHYADHAN (1.19%), however the maximum percent of white earheads was observed in TN1 (13.37%), SWARNA (11.22%) and IR-92960-75-1-3 (9.87%). Infestation was significantly and positively correlated with total sugar, crude protein and total free amino acid; showed significant negative correlation with phenol, crude silica tannin.
Oryza sativa, Germplasms, Biochemical, Total sugar, Phenol, Crude silica, Crude proteins, Total free amino acids, Tannins, Defensive reaction, Scirpophaga incertulas, Resistance, Susceptible
