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 herbicide resistant weeds with trifludimoxazin and saflufenacil, wherein the amount of trifludimoxazin is from 10 to 20 g per 10000 m 2  and the amount of saflufenacil is from 20 to 40 g per 10000 m 2 . 
     
     
         2 . The method of  claim 1 , wherein the 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 herbicide resistant weed is  Amaranthus palmeri , waterhemp, or ragweed. 
     
     
         4 . The method of  claim 1 , the method being 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 herbicide resistant weed is a lactofen resistant weed or fomesafen resistant weed.