METHOD: Test Diet CONDITIONS: Green House METHOD NARR: Two bioassays were performed using tbr cv. Atlantic. The first with tuber disks treated with ber473334 extracts. The second with leaf disks treated with the berthaultii extere divided into volatile and non-volatile as well as internal and external fractions. CPB were allowed to feed. RESULTS NARR: Increasing concentrations of ber leaf rinses applied to tuber disks resulted in linear decreaslarly, feeding decreased in the leaf disk assay, but in an exponential fashion. The nonvolatile fraction was deterrent, while the voltile fraction tended to reduce consumption, but not significantly. Neither fraction was as de AUTHOR EXPLANATION: Authors hypothesize that the feeding deterrents are produced by the type A trichomes.