Vol. 9, Issue 1, Part E (2025)

A field experiment of linseed germplasm for biophysical analysis based on the budfly infestation index (BII) was undertaken during Rabi 2020-21 to 2021-22 at the College of Agriculture, IGKV, Raipur. After screening 105 linseed germplasms for resistance to budfly infestation, 13 were selected for biophysical analysis based on the budfly infestation index (BII). Biophysical studies revealed that maximum budfly damage of 18.61% found lesser sepal thickness of 0.34 mm in L-6026 (moderately resistant germplasm), germplasm with minimum budfly damage of 7.74% found more sepal thickness of 0.46 mm in L-6247 (resistant germplasm). Additionally, sepal trichome length ranged from 25.50 to 133.90 μ. Germplasm with minimum budfly damage (6.69%) had longer sepal trichomes (133.90 μ) in L-6033 (resistant category), while germplasm with maximum budfly damage (26.67%) had shorter sepal trichomes (25.50 μ) in L-6046 (moderately susceptible category). These findings suggest that both sepal thickness and trichome length play a role in plant resistance to budfly infestation, highlighting trichomes as a potential mechanism of resistance in linseed genotypes.