Herbicidal compositions comprising isoxaben and aminopyralid

1. An herbicidal composition comprising (a) isoxaben and (b) aminopyralid or an agriculturally acceptable salt or ester thereof, wherein the weight ratio of (a) to (b) is 40:5.

2. The herbicidal composition of claim 1 wherein isoxaben and aminopyralid or an agriculturally acceptable salt or ester thereof are the only herbicidally active ingredients.

3. The herbicidal composition of claim 1 additionally comprising (c) flufenacet, wherein the weight ratio of (a) to (b) is 40:5:200.

4. The herbicidal composition of claim 3 wherein isoxaben, aminopyralid or an agriculturally acceptable salt or ester thereof, and flufenacet are the only herbicidally active ingredients.

5. The herbicidal composition of claim 1 additionally comprising (c) flufenacet, and (d) diflufenican, wherein the weight ratio of (a) to (b) to (c) to (d) is 40:5:200:100.

6. The herbicidal composition of claim 5 wherein isoxaben, aminopyralid or an agriculturally acceptable salt or ester thereof, flufenacet and diflufenican are the only herbicidally active ingredients.

7. A method of controlling undesirable vegetation which comprises applying to the an undesirable vegetation or locus thereof, an herbicidally effective amount of (a) isoxaben and (b) aminopyralid or an agriculturally acceptable salt or ester thereof, wherein the weight ratio of (a) to (b) is 40:5.

8. The method of claim 7 which further comprises applying an herbicidally effective amount of (c) flufenacet, wherein the weight ratio of (a) to (b) to (c) is 40:5:200.

9. The method of claim 8 wherein the application rate of (c) flufenacet is from 100 to 600 g ai/ha.

10. The method of claim 7 which further comprises applying an herbicidally effective amount of (c) flufenacet and (d) diflufenican, wherein the weight ratio of (a) to (b) to (c) to (d) is 40:5:200:100.

11. The method of claim 10 wherein the application rate of (d) diflufenican is from 50 to 200 g ai/ha.

12. The method of claim 7 wherein the application rate of (a) isoxaben is from 20 to 80 g ai/ha.

13. The method of claim 7 , carried out in the presence of a cereal crop, wherein the cereal crop is rice, wheat, barley, triticale oats, rye, sorghum, or maize.

14. The method of claim 13 wherein the cereal crop is tolerant to glyphosate, glufosinate, dicamba, imidazolinone, phenoxy auxin, pyridyloxy auxin, aryloxyphenoxypropionate, acetyl CoA carboxylase (ACCase) inhibitors, acetolactate synthase (ALS) inhibitors, 4-hydroxyphenyl-pyruvate dioxygenase (HPPD) inhibitors, protoporphyrinogen oxidase (PPO) inhibitors, triazine, or bromoxynil.

15. The method of claim 7 , wherein the undesirable vegetation comprises Stellaria media (L.) Vill, or Geranium dissoctum L.