Cuticular lipids from wild and cultivated peanuts and the relative resistance of these peanut species to fall armyworm and thrips

Abstract

Cuticular lipids were extracted from blooms and foliage of the peanut cultivar Arachis hypogaea L. (Southern Runner) and identified by gas chromatography-mass spectrometry. The major components of the bloom surface lipids were n-alkanes, aldehydes, and fatty acids, while fatty alcohols, fatty acids, and n-alkanes were the major components of the foliage lipids. Cuticular lipids of the foliage from five wild peanut species, A. glandulifera, A. batizocoi, A. ipaensis, A. chacoense, and A. paraguariensis differed in composition. Each wild peanut species was more resistant to fall armyworm, Spodoptera frugiperda, than the cultivar was, and each suffered less thrips damage than the cultivar did