A strong negative relationship was found between the concentrations of procyanidin, a condensed tannin, in the leaf bud petioles of seven genotypes of groundnut (Arachis hypogaea) and fecundity of the aphid Aphis craccivora on the same genotypes. Genotype EC 36892 contained the highest amount of procyanidin per weight of fresh petiole (ca 0.7%) and aphids feeding on this genotype produced significantly fewer offspring than aphids reared on genotypes with low procyanidin levels. It is proposed that testing for high procyanidin concentrations may provide plant breeders with a quick and relatively simple method to screen new groundnut genotypes for resistance against Aphis craccivora.
Grayer, R.J.; Kimmins, F.M.; Padgham, D.E.; Harborne, J.B.; Ranga Rao, D.V. Condensed tannin levels and resistance of groundnuts (Arachis hypogaea) against Aphis craccivora. Phytochemistry (1992) 31 (11) 3795-3800. [DOI: 10.1016/S0031-9422(00)97530-7]