Method for controlling weeds
The present invention provides a method which exerts excellent control effect in controlling weeds. The method for controlling weeds, which comprises a step of performing a spot treatment of clethodim in a cultivation area of soybean, cotton, sugar beet, rapeseed or sunflower.
1 . A method for controlling weeds, the method comprising:
performing a spot treatment with clethodim by a sprayer in a cultivation area of soybean, wherein the weeds is volunteer corn, and wherein the sprayer is not handheld, and an application amount of clethodim is from 20 to 500 g per 10,000 m 2 as the application amount inside a spot-treated section,
wherein a proportion of an area subjected to the spot treatment in the cultivation area of soybean, which is a proportion of the area to which clethodim is sprayed relative to an entire area of a continuous cultivation area of soybean, is from 1% to 99%.
2 . The method according to claim 1 , wherein clethodim is applied to at least 10% of an area of the cultivation by the spot treatment.
3 . The method according to claim 1 , wherein the cultivation area comprises a place where soybean is cultivated or a place where soybean is to be cultivated.
4 . The method according to claim 1 , wherein the spot treatment comprises selectively spraying clethodim on places where weeds are growing or may grow.
5 . The method according to claim 1 , wherein clethodim is comprised in a formulation.
6 . The method according to claim 5 , wherein clethodim is mixed with a carrier in the formulation.
7 . The method according to claim 6 , wherein the carrier is a solid carrier or a liquid carrier.
8 . The method according to claim 5 , wherein the formulation further comprises a surfactant.
9 . The method according to claim 5 , wherein the formulation further comprises at least one other herbicide.
10 . The method according to claim 5 , wherein the formulation comprises from 0.01 wt % to 90 wt % of clethodim.
11 . The method according to claim 9 , wherein the formulation comprises from 0.01 wt % to 90 wt % of a total of clethodim and the at least one other herbicide.
12 . The method according to claim 1 , wherein the proportion of the area subjected to the spot treatment in the cultivation area of soybean is from 10% to 80%.
13 . The method according to claim 5 , wherein from 0.12% to 6% volume/volume of an oil-based adjuvant is added to the formulation.
14 . The method according to claim 5 , wherein the formulation is in a form of a spray liquid having a pH of from 5 to 9, and a hardness of from 0 to 500.
15 . The method according to claim 1 , wherein the spot treatment comprises applying clethodim in a form of a spray liquid in combination with another herbicide, a plant growth regulator, and a safener.