Herbicidal and fungicidal triazinediones of the formula ##STR1## wherein R.sup.1 is an aliphatic group, and either (a) R.sup.2 is carboxylic acyl, or (b) R.sup.2 is hydrogen or aliphatic and R.sup.3 together with the group X forms a divalent radical Z linking the exocyclic nitrogen with the ring to form a second 5 or 6 membered heterocyclic ring, and X is hydrogen or an aliphatic radical, or together with R.sup.3 forms the divalent group Z.
                            式子中的
除草剂和杀菌剂三嗪二酮的
化学式为##STR1##其中R.sup.1是一个脂肪基,而且要么(a) R.sup.2是
羧酸酰基,要么(b) R.sup.2是氢或脂肪基,R.sup.3与基团X一起形成一个二价基团Z,将外环氮原子与环连接起来形成第二个5或6元杂环,X是氢或脂肪基,或者与R.sup.3一起形成二价基团Z。