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CN-121970774-A - Pesticide suspending agent containing thiophanate-methyl and trifloxystrobin and preparation method thereof

CN121970774ACN 121970774 ACN121970774 ACN 121970774ACN-121970774-A

Abstract

The invention relates to the field of pesticide compositions, in particular to a pesticide suspending agent containing thiophanate-methyl and trifloxystrobin and a preparation method thereof. The invention provides a pesticide suspending agent containing thiophanate-methyl and trifloxystrobin, which comprises, by mass, 5-6 parts of trifloxystrobin, 40-42 parts of thiophanate-methyl, 3-5 parts of a wetting dispersing agent, 2-3 parts of a dispersing agent, 1-3 parts of a wetting emulsifying agent, 1-2 parts of a suspension thixotropic agent, 3-5 parts of an antifreezing agent, 0.1-0.3 part of a preservative, 0.1-0.3 part of a thickening agent, 0.1-0.3 part of an antifoaming agent and 35-45 parts of water. The pesticide suspending agent containing thiophanate-methyl and trifloxystrobin provided by the invention has the advantages of excellent stability, low irritation to crops, good environmental compatibility and good popularization and application value.

Inventors

  • GUO MINGJIE
  • WU MINGLUN
  • LIU MINJIE
  • JI QINGWEI
  • ZHU XIAOYU

Assignees

  • 兴农药业（中国）有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (10)

  1. 1. The pesticide suspending agent containing thiophanate-methyl and trifloxystrobin is characterized by comprising, by mass, 5-6 parts of trifloxystrobin, 40-42 parts of thiophanate-methyl, 3-5 parts of wetting dispersant, 2-3 parts of dispersant, 1-3 parts of wetting emulsifier, 1-2 parts of suspension thixotropic agent, 3-5 parts of antifreezing agent, 0.1-0.3 part of preservative, 0.1-0.3 part of thickener, 0.1-0.3 part of defoamer and 35-45 parts of water; the mass concentration of the trifloxystrobin is 97-99%; the mass concentration of the thiophanate-methyl is 97-99%.
  2. 2. The pesticide suspension containing thiophanate-methyl and trifloxystrobin according to claim 1, wherein said wetting dispersant is a block polyether mixture.
  3. 3. The pesticidal suspension containing thiophanate-methyl and trifloxystrobin of claim 2, wherein said block polyether mixture is identified by the trademark MALIDIS 1895.
  4. 4. The pesticide suspension containing thiophanate-methyl and trifloxystrobin of claim 1, wherein the dispersant is a polycarboxylate.
  5. 5. The pesticide suspension containing thiophanate-methyl and trifloxystrobin of claim 4, wherein the polycarboxylate is identified by the brand name ultrasurf 7023A.
  6. 6. The pesticide suspension containing thiophanate-methyl and trifloxystrobin of claim 1, wherein the wetting emulsifier is a block copolymer.
  7. 7. The pesticide suspension containing thiophanate-methyl and trifloxystrobin of claim 6, wherein the block copolymer is identified by the trade designation MALIDIS L.
  8. 8. A pesticide suspension containing thiophanate-methyl and trifloxystrobin according to any one of claims 1 to 7, wherein said suspension thixotropic agent comprises one of bentonite, fumed silica or magnesium aluminium silicate.
  9. 9. The pesticide suspension containing thiophanate-methyl and trifloxystrobin according to claim 1, wherein said thickener comprises one of xanthan gum, guar gum, carbomer or sodium carboxymethyl cellulose.
  10. 10. A process for the preparation of a pesticide suspension containing thiophanate-methyl and trifloxystrobin according to any one of claims 1 to 9, comprising the steps of: sequentially adding a wetting dispersing agent, a wetting emulsifying agent, a suspension thixotropic agent, an antifreezing agent, a preservative, a defoaming agent and water into a homogenizing kettle, adding trifloxystrobin and thiophanate-methyl into the homogenizing kettle, stirring the mixture into uniform slurry, adding a thickening agent into the slurry after sanding, and stirring the slurry uniformly to obtain the pesticide suspending agent containing thiophanate-methyl and the trifloxystrobin.

Description

Pesticide suspending agent containing thiophanate-methyl and trifloxystrobin and preparation method thereof Technical Field The invention relates to the field of pesticide compositions, in particular to a pesticide suspending agent containing thiophanate-methyl and trifloxystrobin and a preparation method thereof. Background In the field of agricultural pest control, citrus resin disease (also called sandy skin disease) is one of important diseases affecting the development of the citrus industry, and seriously reduces fruit quality and yield. The single bactericide in the current market has the problems of limited control effect, easy generation of drug resistance of pathogenic bacteria and the like, and is difficult to meet the requirements of modern agriculture on efficient and durable prevention and control of diseases. The thiophanate-methyl serving as a broad-spectrum benzimidazole bactericide plays a role in inhibiting pathogenic bacteria cell division, the trifloxystrobin belongs to a methoxy acrylic acid ester bactericide, achieves a bactericidal effect by blocking pathogenic bacteria respiration, has different action mechanisms, and has a technical foundation for compound use. Related researches on the compounding of thiophanate-methyl and trifloxystrobin exist in the prior art, for example, patent CN102217617A discloses a pesticide composition containing the trifloxystrobin, the effective active ingredients of the pesticide composition comprise the trifloxystrobin (A) and the carbendazim or the thiophanate-methyl (B), the weight ratio of the two is 1:64-16:1, the total content of the effective active ingredients accounts for 1-90% of the total weight of the composition, and the preferable content is 10-80%. The patent also discloses that the composition can be prepared into various dosage forms such as wettable powder, water dispersible granules, suspending agents, suspending emulsion and the like, and provides technical reference for the compound application of thiophanate-methyl and trifloxystrobin. Although the prior patent discloses a compounding scheme of thiophanate-methyl and trifloxystrobin, an optimization space still exists in practical application. On one hand, the prior art does not form a special compound formula aiming at the specific disease of the citrus tree resiniferations, lacks targeted data support, and on the other hand, the existing suspending agent formulation has potential to be improved in the aspects of stability, dispersibility, convenience in field use and the like. In addition, the existing weight ratio range is wider, the optimal proportion for specific diseases is not clear, and the optimal balance of control effect and cost control is difficult to realize, so that development of a pesticide suspending agent containing thiophanate-methyl and trifloxystrobin with stronger pertinence and better performance is needed. Disclosure of Invention In order to solve the problems, the invention provides a pesticide suspending agent containing thiophanate-methyl and trifloxystrobin, which comprises, by mass, 5-6 parts of trifloxystrobin, 40-42 parts of thiophanate-methyl, 3-5 parts of wetting dispersant, 2-3 parts of dispersant, 1-3 parts of wetting emulsifier, 1-2 parts of suspension thixotropic agent, 3-5 parts of antifreezing agent, 0.1-0.3 part of preservative, 0.1-0.3 part of thickener, 0.1-0.3 part of defoamer and 35-45 parts of water. As a practical case, the mass concentration of the trifloxystrobin is 97-99%. As a practical case, the mass concentration of the thiophanate-methyl is 97-99%. Further, the mass concentration of the trifloxystrobin is 98%. Further, the mass concentration of the thiophanate-methyl is 98%. The traditional single bactericide is easy to cause pathogenic bacteria to generate drug resistance, has limited control effect and short duration, and the scheme utilizes the synergistic action mechanism of thiophanate-methyl and trifloxystrobin to inhibit pathogenic bacteria from different targets, so that the problems of quick drug resistance and poor control effect of the single bactericide are solved, the duration is prolonged, and the application times are reduced. Meanwhile, the existing suspending agent has the problems of layering, precipitation, particle size increase, uneven dispersion, poor atomization effect, weak rain wash resistance and the like after hot storage/cold storage, and the core pain point of unstable suspension system and poor field use convenience is solved by scientifically matching auxiliary agents such as wetting dispersant, suspension thixotropic agent and the like and combining with strictly controlled purity of the original drug; the high-purity raw pesticide and the low-toxicity environment-friendly auxiliary agent are selected, so that the problems of high risk of pesticide injury and large environmental influence of the preparation are solved, and the environment-friendly pesticide meets the standard of green pesticides.