Absorption, translocation, and metabolism of C-14-glufosinate in Xanthium strumarium, Commelina difusa, and Ipomoea purpurea

The absorption, translocation, and metabolism of glufosinate were investiga ted in three differentially susceptible weeds, Xanthium strumarium (most su sceptible), Ipomoea purpurea (intermediate susceptibility), and Commelina d iffusa (least susceptible). Xanthium strumarium absorbed about three times more C-14-glufosinate than Ipomoea purpurea and about six rimes more C-14-g lufosinate than Commelina diffusa. Translocation of the applied herbicide o ut of the treated leaf was low. No evidence of glufosinate metabolism, eith er in the treated leaves or roots, was found when the extracts were separat ed by HPLC.