6-Methoxy-2-benzoxazolinone (MBOA) is an allelochemical that found in Poaceae and generally associated with monocotyledon species. This compound formed from the glycosylated form of 2,4-dihydroxy-(2H)-1,4-benzoxazin-3(4H)-one (Gly-DIMBOA) by a two-stage degradation process. The MBOA detoxification capacity two weed species, namely Echinochloa crus-galli Lolium rigidum, resistant biotype rigidum...