Vol. 12, Special Issue 7 (2023)

Author(s):
Ramanaji Naralasetti and BP Katlam

Abstract:
The screening of groundnut germplasms during Rabi, 2021–22, at the College of Agriculture, Raipur, farm revealed that NRCG - 134, NRCG - 8457, NRCG - 10348, NRCG – 10406 and NRCG – 10328 were the relatively resistant germplasms for thrips. The resistance in these germplasms was conferred due to higher leaf thickness (mm), trichome density per mm², and high chlorophyll content. The correlation studies also revealed that there was a significant negative correlation between biophysical parameters [leaf thickness (r = -0.910), trichome density (r = -0.945), and chlorophyll content (r = -0.588] and percent leaf damage by thrips. Except for phenols (r = -907), which exhibited a significant negative correlation with thrips percentage damage, other biochemical measures [total sugars (r = 0.942), reducing sugars (r = 0.914), non-reducing sugars (r = 0.709), and amino acids (r = 0.975)] showed a significant positive correlation with the percentage of leaf damage caused by thrips.