Uptake, Translocation, and Metabolism of Bentazon by Two Pepper Species (Capsicum annuumandCapsicum chinense)

Abstract

Similar uptake and translocation patterns were observed in sweet pepper (Capsicum annuumL. ‘Keystone Resistant Giant’) and hot pepper (Capsicum chinenseL. ‘Bohemian Chili’) following foliar applications of14C-bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide]. In both species, most of the14C absorbed remained in the treated leaves, with minimal acropetal and basipetal translocation from the application site. A significantly faster rate of herbicide metabolism occurred in hot pepper at 1 and 4 days after application compared to sweet pepper. Two unidentified metabolites of bentazon were isolated from methanol extracts of the two species.