Methods and compositions comprising herbicidally active compounds and thiocyanate compounds for controlling weed growth
Provided are methods and compositions to control growth of weed plants. The compositions include an herbicidally effective amount of an herbicidally active chemical compound and a thiocyanate, together with an herbicidally acceptable diluent, carrier or excipient. The thiocyanate preparation can be provided in the form of a glucosinolate hydrolysate obtained from Sinapis alba plant material. Methods of making and using the formulations are also provided.
1 . A method for controlling growth of a weed plant, the method comprising co-applying N-(phosphomethyl)glycine (glyphosate), or an herbicidally acceptable salt thereof, and thiocyanate, wherein the relative applied dry weight of thiocyanate to the relative applied dry weight of N-(phosphomethyl)glycine (glyphosate), or an herbicidally acceptable salt thereof, is selected to be 450:1 to 550:1, and wherein the thiocyanate is applied at a rate of from 10 kilogram to 25 kilogram thiocyanate per acre.
2 . A method according to claim 1 , wherein a first formulation comprising N-(phosphomethyl)glycine (glyphosate), or an herbicidally acceptable salt thereof and a second formulation comprising the thiocyanate are sequentially co-applied to the weed plant or wherein the N-(phosphomethyl)glycine (glyphosate), or an herbicidally acceptable salt thereof and the thiocyanate are co-formulated to form a co-formulated herbicidal formulation, and the co-formulated herbicidal formulation is applied to the weed plant.
3 . A method according to claim 1 , wherein the thiocyanate is allyl thiocyanate (ATC) or a thiocyanate ion (SCN).
4 . A method according to claim 1 , wherein the thiocyanate is included in a hydrolyzed glucosinolate preparation.
5 . A method according to claim 4 , wherein the hydrolyzed glucosinolate preparation is a plant seed extract or a plant seed meal extract.
6 . A method according to claim 1 , wherein the weed plant is a dicotelydenous weed plant, monocotelydenous weed plant or a perennial weed plant.
7 . A method according to claim 1 , wherein the relative applied dry weight of thiocyanate to the relative applied dry weight of N-(phosphomethyl)glycine (glyphosate), or a herbicidally acceptable salt thereof, is selected to be 500:1.