Herbicide containing glyphosate and dicamba and preparation method thereof

Abstract

The invention relates to the technical field of a pesticide and particularly relates to a herbicide containing glyphosate and dicamba and a preparation method thereof. The herbicide is prepared from the following raw materials in parts by weight: 40-65 parts of glyphosate, 15-25 parts of dicamba, 27-48 parts of alkaline substances, 2-5 parts of a surface active agent and 0-5 parts of inorganic filler. Verified by experiments, when the mass ratio of the glyphosate to the dicamba is 3 to 1, the optimal synergistic effect can be generated; by selection of proper surface active agent and proper used amount, the pesticide effect is obviously improved; verified by experiments, N-polyoxyethylated-N-tallow-alkylamine or alkyl polyglucoside is selected as the surface active agent, and when the weight part of N-polyoxyethylated-N-tallow-alkylamine or alkyl polyglucoside is 5, the obvious synergistic effect can be achieved, the foaming property is not more than 20mL, and the dissolution of a preparation cannot be influenced; and in addition, the invention also provides a preparation method of the herbicide. In preparation, a solid-solid synthesis process is adopted, the production efficiency is improved, the production cost is saved and the energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a herbicide containing glyphosate and dicamba and a preparation method thereof. Background technique [0002] Glyphosate is a non-selective, non-residual herbicide that kills perennial root weeds and is widely used in rubber, mulberry, tea, orchards and sugarcane fields. Glyphosate was initially used in rubber gardens to control thatch and other weeds, which can make rubber tapping one year earlier and increase the production of old rubber trees. It is now gradually being used in forestry, orchards, mulberry gardens, tea gardens, rice-wheat, rice and rapeseed rotations, etc. place. Various weeds have different sensitivity to glyphosate, so the dosage is also different. For example, annual weeds such as barnyardgrass, green foxtail, goosegrass, crabgrass, and cattail, the dosage is calculated as 6~10.5g / 100m; the dosage of psyllium, chrysanthemum, and commelina is 11.4~15g / 10...

AI Technical Summary

Problems solved by technology

[0006] First of all, the simple tank mixing method cannot accurately grasp the ratio of glyphosate and dicamba, and for the compound use of the two pesticides, the difference in the ratio will cause significant differences in the efficacy

This may cause the mixed pesticide to not achieve the best control effect

[0007] Secondly, in most cases, the tank mixing method does not add additives, even if it is added, it cannot be accurately quantified, and the type and amount of additives also play a vital role in the efficacy of pesticides

[0008] Moreover, since both glyphosate and dicamba are acidic substances and are not easily soluble in water, simply mixing the two in a tank is likely to greatly reduce the efficacy of the drug due to precipitation

Although there is currently a method of salting the two to improve solubility, the salt-forming process is mostly carried out in a solvent and then crystallized again to obtain the salt, which causes the loss of the product

Moreover, salting glyphosate and dicamba before mixing also increases the complexity of the operation

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