Sumitomo Chemical Company, Limited

Yoshihiro Mano

Hideyuki Shibata

Ryo Yoshida

Ryo Yoshido

A herbicidal composition which comprises a herbicidally effective amount of the combinations of (a) 2-[7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl]-4,5,6 ,7-tetrahydro-1H-isoindole-1,3(2H)-dione and (b) at least one of (2-amino-4-methylphosphinobutyryl)alanylalanine and its salt (bialaphos) and DL-homoalanin-4-yl(methyl)phosphinic acid and its salt (glufosinate), and an inert carrier or diluent. The composition exerts synergistic herbicidal activity.

Herbicidal composition

A herbicidal composition which comprises as an active ingredient a herbicidally effective amount of the combination of (a) 2-[7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl]-4,5,6 ,7-tetrahydro-1H-isoindole-1,3(2H)-dione and (b) a compound of the formula: ##STR1## wherein R.sub.1 is any one of the formulas: ##STR2## wherein R.sub.2 is a C.sub.1 -C.sub.4 alkyl group, and an inert carrier or diluent. The composition shows a synergistic herbicidal potency.

A herbicidal composition which comprises as the active ingredients (a) 2-[7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl]-4,5,6 ,7-tetrahydro-1H-isoindole-1,3(2H)-dione and (b) N-(phosphonomethyl)glycine or its salt (glyphosate), and an inert carrier or diluent. The composition exerts a synergistic herbicidal activity.

A herbicidal composition which comprises as an active ingredient a herbicidally effective amount of the combination of (a) 2-[7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl]-4,5,6 ,7-tetrahydro-1H-isoindole-1,3(2H-dione and (b) a compound of the formula: ##STR1## wherein R.sub.1 is any one of the formulas: ##STR2## wherein R.sub.2 is a C.sub.1 -C.sub.4 alkyl group, and an inert carrier or diluent. The composition shows a synergistic herbicidal potency.

A herbicidal composition which comprises as the active ingredients (a) 2-[7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazine-6-yl]-4,5, 6,7-tetrahydro-1H-isoindole-1,3(2H)-dione and (b) 2-[[(E)-3-chloroallyloxyimino]propyl]-5-(2-ethylthiopropyl)-3-hydroxycyclo hex-2-enone (clethodim), and an inert carrier or diluent.

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Toyonaka, Japan

Yoshihiro Mano