SOLID HERBICIDAL COMPOSITIONS CONTAINING A SAFENER
Solid herbicidal compositions in the form of granules that contain pyroxsulam and cloquintocet acid are provided. These solid herbicidal compositions have excellent storage stability, are produced in a simple and efficient manner, and readily wet, disperse, and form a stable suspension in cold water.
1 . A solid herbicidal composition comprising:
a) from about 50 grams active ingredient per kilogram (g ai/kg) to about 600 g ai/kg, with respect to the total composition, of pyroxsulam;
b) from about 50 g ai/kg to about 600 g ai/kg, with respect to the total composition, of cloquintocet acid;
c) from about 30 g ai/kg to about 250 g ai/kg, with respect to the total composition, of a lignosulfonate salt;
d) from about 10 g/kg to about 100 g/kg, with respect to the total composition, of an anionic surfactant; and
e) from about 50 g/kg to about 250 g/kg, with respect to the total composition, of a solid buffer.
2 . The solid herbicidal composition of claim 1 , wherein the solid herbicidal composition is an extruded granule.
3 . The solid herbicidal composition of claim 1 or 2 , further comprising a disintegrant.
4 . The solid herbicidal composition of claim 3 , wherein the disintegrant is a urea-formaldehyde co-polymer.
5 . The solid herbicidal composition of any of claims 1 - 4 , wherein the solid buffer is ammonium sulfate or citric acid.
6 . A method for preparing a solid herbicidal composition comprising:
a) providing and combining together the dry ingredients described in any of claims 1 - 5 and air milling them;
b) adding water to the air milled, dry ingredients;
c) mixing the air milled, dry ingredients and water to form an extrudant;
d) extruding the extrudant to provide extruded granules; and
e) drying the extruded granules.