2,3-DI-(E)-CAFFEOYL-(2R,3R)-(-TARTARIC ACID IN TERMINALS OF PEANUT (ARACHIS-HYPOGAEA L) VARIETIES WITH DIFFERENT RESISTANCES TO LATE-LEAF-SPOT-DISEASE [CERCOSPORIDIUM-PERSONATUM (BERK-AND-MA-CURTIS) DEIGHTON] AND THE INSECTS TOBACCO THRIPS [FRANKLINIELLA-FUSCA (HINDS)] AND POTATO LEAFHOPPER [EMPOASCA-FABAE (HARRIS)]())

Peanut (Arachis hypogaea L.) terminals (partially opened vegetative qu adrifoliate leaf buds) of varieties with varying levels of resistance to the late leaf spot disease (LLSD) fungus [Cercosporidium personatum (Berk. and M. A. Curtis) Deighton] and the insects tobacco thrips [Fr ankliniella fusca (Hinds)] and potato leafhopper [Empoasca fabae (Harr is)] were analyzed for their polyphenolic content. All varieties conta ined only one major polyphenol, which was isolated and identified as 2 ,3-di-(E) -caffeoyl-(2R,3R)(+)-tartaric acid (levorotatory chicoric ac id), previously reported in only one other plant species. Levels of l- chicoric acid were highest in newly emerged terminals (0.25% fresh wt) of Florunner (susceptible to LLSD) and Southern Runner (resistant) va rieties and showed a steady decline (to 0.019%) as the leaves matured over 18 days. Levels of chicoric acid did not correlate with resistanc e to late leaf spot disease, tobacco thrips, or potato leafhopper.