Flumioxazin Compositions
An aqueous liquid herbicide composition comprising a water-insoluble pesticide, for example flumioxazin, and one or more water-soluble pesticides, for example one or more of dicamba, 2,4-D, metribuzin, and imazethapyr, is provided. The water-soluble pesticide is dissolved in a continuous aqueous phase of the composition and solid particles of the water-insoluble pesticide are suspended in the aqueous phase. These compositions exhibit enhanced resistance to settling of the solid particles and/or enhanced resistance to chemical degradation of the water-insoluble pesticide by comparison with otherwise similar compositions.
1 . An aqueous liquid herbicide suspension concentrate composition comprising:
about 40% to about 50% by weight flumioxazin in suspension in a continuous aqueous phase, one or more wetting agents, one or more dispersing agents, one or more antifoam agents, one or more antifreeze agents, and one or more thickening agents.
2 . The composition of claim 1 , comprising:
about 40% to about 50% by weight flumioxazin,
about 3% to about 5% by weight of one or more wetting agents,
about 1% to about 3% by weight of one or more dispersing agents,
about 0.1% to about 0.2% by weight of one or more antifoam agents,
about 5% to about 7% by weight of one or more antifreeze agents,
about 0.1% to about 0.2% by weight of or more thickening agents, and
about 0.1% to about 0.2% by weight preservative, and
about 30% to about 49% by weight water.
3 . The composition of claim 1 , comprising:
about 45% by weight flumioxazin,
about 4% by weight of one or more wetting agents,
about 2.3% by weight of one or more dispersing agents,
about 0.1% by weight of or more antifoam agents,
about 6% by weight of one or more antifreeze agents,
about 0.15% by weight of one or more thickening agents,
about 0.1% by weight preservative, and
about 42% by weight water.
4 .- 19 . (canceled)
20 . The composition of claim 1 , wherein the flumioxazin is milled to a particle size of 1 to 10 micron.
21 . The composition of claim 1 , wherein the herbicidal component consists essentially of flumioxazin.
22 . The composition of claim 1 , wherein the composition comprises inert powdered gelling grade attapulgite.
23 . The composition of claim 1 , wherein the attapulgite is present in an amount to form colloidal gells and provide thixotropic thickening.
24 . The composition of claim 23 , wherein the attapulgite chemical composition is (Mg,Al) 5 Si 8 O 20 .4H 2 O.
25 . The composition of claim 1 , wherein the composition comprises a wetting agent which is a nonionic surfactant.
26 . The composition of claim 25 , wherein the wetting agent is a nonionic surfactant of HLB of 12.
27 . The composition of claim 1 , wherein the composition comprises a dispersing agent which is a nonionic surfactant blend.
28 . The composition of claim 27 , wherein the nonionic surfactant blend has an HLB of 16.
29 . The composition of claim 1 wherein the composition comprises a dispersing agent which is sodium salt of naphthalene sulfonate condensate or a blend of alkyl naphthalene sulfonate and anionic wetting agent.
30 . The composition of claim 1 wherein the thickening agent comprises a xanthan gum.
31 . The composition of claim 1 , comprising:
about 40% to about 50% by weight flumioxazin,
about 3% to about 5% by weight of wetting agent which is a nonionic surfactant of HLB 12,
about 1% to about 3% by weight of one or more dispersing agents comprising nonionic surfactant blend of HLB 16 and powdered gelling grade attapulgite.
about 0.1% to about 0.2% by weight antifoam agent,
about 5% to about 7% by weight antifreeze agent,
about 0.1% to about 0.2% by weight thickening agent,
about 0.1% to about 0.2% by weight preservative, and
about 30% to about 49% by weight diluent.
32 . The composition of claim 31 , wherein the thickening agent is a xanthan gum.
33 . A method of controlling the presence of undesirable plants, the method comprising the steps of:
diluting the composition of claim 1 in water; and,
applying an herbicidally effective amount of the diluted composition to the foliage of the undesirable plants or to the soil where undesirable plants grow.
34 . An aqueous suspension concentrate composition comprising fumioxazin in an amount of about 5% to about 10% by weight of the composition, metribuzin in an amount of about 30% to about 35% by weight of the composition and imazethapyr in an amount of about 5% to about 10% by weight of the composition, wherein at least the flumioxazin is present in suspension in the aqueous suspension concentrate.
35 . The aqueous suspension concentrate composition of claim 34 , further comprising one or more wetting agents, one or more dispersing agents, one or more antifoam agents, one or more antifreeze agents, and one or more thickening agents.