Weeding composition as well as use method and application thereof

Abstract

The invention discloses weeding composition as well as a use method and an application thereof. The weeding composition is prepared from two active constituents including 2,4-dichlorophenoxyacetic acid and cloransulam-methyl as well as a volatilization inhibitor, wherein the volatilization inhibitor is prepared from fatty alcohol, grease and polyoxyethylene ether; the fast-acting property of the weeding composition becomes better obviously under synergy of the active constituents and the volatilization inhibitor; when the application amount is 60 g active constituents / hectare, the highest preventing effect of the weeding composition 7 days after application can reach 94.4% for each plant, the weed control effect can be kept for 45 days or longer, and when the application amount is 60 g active constituents / hectare, the highest preventing effect of the weeding composition 45 days after application can reach 100% for each plant.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a herbicidal composition and its application method and application. Background technique [0002] Soybean originates in China and is cultivated in various parts of China. It is most famous in Northeast China and is also widely cultivated all over the world. In 2018, China's soybean planting area was 7.78 million hectares, which is an important food crop in my country. 2,4-D resistant genetically modified soybeans are genetically modified soybeans resistant to 2,4-D herbicides that were launched by multinational companies such as Monsanto, Syngenta and Dow AgroSciences in the early 2000s. Because the herbicide 2,4-D can be directly applied without harming soybeans, the labor and production costs of growers are greatly reduced. [0003] 2,4-D (2,4-Dichlorophenoxyacetic acid) chemical name is 2,4-dichlorophenoxyacetic acid, systemic selective herbicide, in 1944, the US Department of Agr...

AI Technical Summary

Problems solved by technology

The herbicidal composition of the present invention is obviously once strong with respect to the herbicidal effect of single use of sulfafelam, but there is still the problem that the application amount is large and the quick effect is poor. When the application amount is 80mL / mu, the application After 10 days, the strain control effect was only 75.6%

[0007] CN1398266A discloses a herbicidal composition containing chlorester-sulam and imazethapyr, its active ingredient is chlorester-sulam and imazethapyr, and described chlorester-sulam and imazethapyr The weight ratio of smoke is 4:0.2-20, and the weight of cloxazone and imazethapyr accounts for 20-60% of the total weight of the herbicidal composition, and the described herbicidal composition is relative to the simple cloxazone The herbicidal performance has been significantly improved, but there is still no obvious synergistic effect between clofensulam and imazamox, and the application amount is large. The content of active ingredients in a single application amount is >75g / ha. The problem of short shelf life

[0009] Though said scheme provides the composition of some herbicidal compositions, still there is the problem of large application amount, poor quick-acting property and short duration of effect after application. Long-lasting herbicidal compositions are still important

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