Fenpropathrin and chlorpyrifos-containing composite insecticidal and acaricidal nano aqueous solution as well as preparation method and application thereof

A technology containing fenpropathrin and fenpropathrin, which is applied in the field of pesticides, can solve the problems of high cost of pesticides for farmers, easy to produce drug resistance, and inability to protect crops, so as to reduce the amount of pesticides used, improve the control effect, and delay the resistance. sexual effect

Inactive Publication Date: 2020-04-14
NANJING HUAZHOU PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Insecticide varieties containing a single component often have defects in the control of pesticide pests: continuous use is easy to produce resistance, narrow insecticidal spectrum, cannot provide comprehensive protection for crops, and the cost of pesticides for farmers is high.

Method used

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  • Fenpropathrin and chlorpyrifos-containing composite insecticidal and acaricidal nano aqueous solution as well as preparation method and application thereof
  • Fenpropathrin and chlorpyrifos-containing composite insecticidal and acaricidal nano aqueous solution as well as preparation method and application thereof
  • Fenpropathrin and chlorpyrifos-containing composite insecticidal and acaricidal nano aqueous solution as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Indoor toxicity test

[0027] 1. The virulence test of fenpropathrin, chlorpyrifos and fenpropathrin·chlorpyrifos compound nano-aqueous on citrus red spider was carried out by dipping glass slide method, each treatment was repeated 3 times, each concentration treated 30 heads, with LC 50 The value is calculated based on Sun Yunpei’s method of co-toxicity coefficient (CTC value):

[0028] Single-dose toxicity index = standard drug LC50 / a single-dose LC50×100

[0029] Theoretical Toxicity Index (TTI) = A single dose toxicity index × A single dose proportion in the mixture + B single dose toxicity index × B single dose proportion in the mixture

[0030] Measured Toxicity Index (ATI) = LC50 value of standard single agent / LC50 value of mixed agent×100

[0031] Co-toxicity coefficient (CTC) = measured toxicity index of the mixture (ATI) / theoretical toxicity index of the mixture (TTI) × 100

[0032] Co-toxicity coefficient classification: when CTC is greater than 120, the mixture has...

Embodiment 2

[0048] Formula: 10g fenpropathrin, 1g chlorpyrifos, 3g alkylphenol polyoxyethylene ether phosphate, 3g fatty alcohol polyoxyethylene ether, 2g alcohol ether succinic acid monoester sodium sulfonate, add water to 100g.

[0049] The preparation method is the same as in Example 1, and 11% fenpropathrin·chlorpyrifos compound nano-aqueous agent is prepared.

[0050] The nano-aqueous agent of this example has a transparent and slightly yellow appearance, a viscosity of 165.5 mPa·s, and an average particle size of 14.8 nm.

[0051] After cold storage at 0°C for 7 days and hot storage at 54°C for 14 days, the preparations did not precipitate and remained stable.

[0052] After entering water, the nano-aqueous agent of this embodiment can quickly dissolve with water to form a completely transparent solution, and the dilution stability is qualified.

Embodiment 3

[0054] Formula: 5g fenpropathrin, 1g chlorpyrifos, 5g sodium fatty acid methyl sulfonate, 3g styrylphenol polyoxyethylene ether, add water to 100g.

[0055] The preparation method is the same as in Example 1, and a 6% fenpropathrin·chlorpyrifos composite nano-aqueous agent is prepared.

[0056] The nano-aqueous agent of this example has a transparent and slightly yellow appearance, a viscosity of 200.5 mPa·s, and an average particle size of 17.6 nm.

[0057] After cold storage at 0°C for 7 days and hot storage at 54°C for 14 days, the preparations did not precipitate and remained stable.

[0058] After entering water, the nano-aqueous agent of this embodiment can quickly dissolve with water to form a completely transparent solution, and the dilution stability is qualified.

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Abstract

The invention discloses a fenpropathrin and chlorpyrifos-containing composite insecticidal and acaricidal nano aqueous solution which is prepared from fenpropathrin and chlorpyrifos as insecticidal and acaricidal active ingredients, a surfactant and water; wherein the weight percentage content of fenpropathrin and chlorpyrifos is 3-80%, the weight percentage content of a pesticide adjuvant is 5-20%, and the balance is water; the weight ratio of fenpropathrin to chlorpyrifos is 20: 1 to 1: 20. According to the invention, nanoscale micelles formed by the surfactant are used for bearing fenpropathrin and chlorpyrifos which are insoluble in water, and active ingredients exist in the nano aqueous solution in the form of nanoscale particles, so that the nano aqueous solution is beneficial to attachment, spreading and permeation of the active ingredients on a target and is more resistant to rain wash. The fenpropathrin and chlorpyrifos-containing composite insecticidal and acaricidal nano aqueous solution can control homoptera pests, lepidoptera pests and mite pests on crops, especially can be used for controlling rice planthoppers and citrus red spiders, and has obviously higher effect than a single agent.

Description

Technical field [0001] The invention belongs to the field of pesticides, and relates to an insecticidal and acaricidal nano aqueous agent with fenpropathrin and chlorpyrifos as main active ingredients, and a preparation method and application thereof. Background technique [0002] Fenpropathrin, chemical name: 2-cyano-3-phenoxybenzyl-2,2,3,3-tetramethylcyclopropane ester. Efficient, broad-spectrum pyrethroids have contact and repellent effects, as well as stomach toxicity. In addition to the general synthetic pyrethroid properties, it has good effects on spider mites of various crops, so it has the advantage of eliminating insects and mites. It is effective against Lepidopteran larvae, and effective against Diptera or Hemiptera pests. It can be used to control pests on cotton, fruit trees, vegetables, tea and flowers. [0003] Chlorpyrifos Standard, molecular formula: C 9 H 11 Cl 3 NO 3 PS. Chemical name: O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate. Chlorpyrifos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N57/16A01N53/08A01P7/02A01P7/04
CPCA01N25/04A01N53/00A01N57/16
Inventor 杨琴洪鹏高瑞花张宝俊白杰
Owner NANJING HUAZHOU PHARMA
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