Phenotypic and Biochemical Mechanism of Resistance in Groundnut Genotype against Thrips

Integrated Approach for Screening Groundnut Genotypes and Unveiling Morphological and Biochemical Factors Associated with Resistance to Thrips, Scirtothrips dorsalis Hood

“…The genotype TAG-24, highly susceptible to thrips, exhibited the highest overall sugar concentration. Total sugars showed positive correlations with thrips population, leaf damage percentage, oviposition, and survivability across various studies (Kandakoor et al, [12], Naik and Somashekhar, [14], Rao et al, [15], Sonawane et al, [2], Rajashree et al, [3], Rudramuni et al, [1]. However, reducing sugars were found to have no significant impact on host plant resistance (Somashekhar and Patil, [16], Naik and Somashekhar, [14].…”

“…This likely explains the low incidence of sucking insect pests in resistant genotypes. High phenol content in plant varieties is directly associated with thrips resistance (Kandakoor et al, [12], Rao et al, 2015; Rajashree et al, [3], Naik and Chakravarthy, [21], Sonawane et al, [2], Rudramuni et al, [1]. Similarly, tannins exhibited significant negative correlations with thrips population, leaf damage percentage, oviposition, and survivability.…”

“…Consequently, research aimed to understand the impact of these morphological traits on insect pest resistance. Leaf thickness was found to have a non-significant relationship with thrips population, leaf damage percentage, oviposition, and survivability (Naik and Somashekhar, [14], Sonawane et al, [2], suggesting its limited role in host plant resistance.…”

“…It is primarily grown for its high-quality edible oil and digestible protein. Small-holder farmers in Asia and Africa produce 90% of the world's groundnuts under rainfed conditions [1] However, the cultivation of groundnut is often challenged by various pests, among them, leafhoppers and thrips pressure is more during summer Sonawane et al, [2] with the thrips species Scirtothrips dorsalis emerging as a notable threat. Thrips infestations can cause substantial damage to groundnut crops, affecting yield and quality.…”

Morphological and Biochemical Variations in Groundnut Genotypes as Related to Thrips <i>Scirtothrips dorsalis</i> Hood Resistance

“…More than 50 insects had been reported to attack groundnut. Among them, leafhoppers and thrips, Scirtothrips dorsalis Hood is more during summer (Sonawane et al, 2019); S. dorsalis alone cause significant economic losses to the tune of 48.5% (Sivasubramanian and Palaniswamy, 1986). Their incidence will be right from vegetative stage till harvesting.…”