Method of controlling herbicide resistant weeds

Abstract

The present invention can provide a method having a high control effect on the removal of herbicide resistant weeds in a cultivation area for crops. The method includes a step of treating weeds with one or more of herbicides selected from the group consisting of saflufenacil, trifludimoxazin, flumioxazin, and ethyl [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-3-yl)phenoxy]-2-pyridyloxy]acetate, wherein the herbicide resistant weeds are PPO-inhibitor resistant weeds having one or more mutations selected from the group consisting of an Arg128Met mutation, Arg128Gly mutation, Arg128His mutation, and Gly399Ala mutation in PPO.

1 . A method of controlling PPO-inhibitor resistant weeds, the method comprising:
 treating the PPO-inhibitor resistant weeds with trifludimoxazin and glyphosate-potassium salt,   wherein a weight ratio of trifludimoxazin to glyphosate-potas slum salt is from 1:154.3 to 2:154.3.   
     
     
         2 . The method of  claim 1 , wherein the PPO-inhibitor resistant weeds have one or more mutations selected from the group consisting of an Arg128Gly mutation and a Gly399Ala mutation, and a Gly210 deletion in PPO. 
     
     
         3 . The method of  claim 1 , wherein the PPO-inhibitor resistant weed is  Amaranthus palmeri, waterhemp, or ragweed.    
     
     
         4 . The method of  claim 1 , wherein the method is performed in crop cultivation. 
     
     
         5 . The method of  claim 4 , wherein the crop is a crop selected from the group consisting of a soybean, corn, cotton, rape seed, rice, wheat, barley, sugarcane, sugar beet, sorghum, and sunflower. 
     
     
         6 . The method of  claim 4 , wherein the crop is a crop which is tolerant to saflufenacil, trifludimoxazin, flumioxazin, or ethyl [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-3-yl)phenoxy]-2-pyridyloxy]acetate, or a combination thereof. 
     
     
         7 . The method of  claim 1 , wherein the PPO-inhibitor resistant weed is a lactofen resistant weed or fomesafen resistant weed. 
     
     
         8 . A herbicidal composition comprising trifludimoxazin and glyphosate-potassium salt,
 wherein a weight ratio of trifludimoxazin to glyphosate-potassium salt is from 1:154.3 to 2:154.3.