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Propamidine water dispersible granule (WDG) and preparation method thereof

A technology of propaneamidine and dispersible granules, which is applied in the field of propaneamidine water-dispersible granules and its preparation, to achieve the effects of extending shelf life, improving economic benefits and reducing pollution

Active Publication Date: 2013-12-04
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently developed dosage form is only 2% propaneamidine aqueous solution

Method used

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  • Propamidine water dispersible granule (WDG) and preparation method thereof
  • Propamidine water dispersible granule (WDG) and preparation method thereof
  • Propamidine water dispersible granule (WDG) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1～ Embodiment 5

[0040] The following table 1 shows the specific formulations of Examples 1-5.

[0041] Table 1: Propanamidine water dispersible granule formula:

[0042]

[0043] Production Process:

[0044] Mix propaneamidine raw powder with a purity of 85% to 90%, wetting agent, dispersant, and disintegrating agent evenly, and then pulverize it through a jet mill to make ultrafine wettable powder, then add a certain amount of water, squeeze The granulator is used for granulation, dried by air flow, and sieved to obtain water-dispersible granules.

[0045] Certainly, the propaneamidine water-dispersible granule of this embodiment can also be prepared according to the conventional water-dispersible granule and its preparation method.

Embodiment 6

[0046] Embodiment 6: prevention effect experiment

[0047] Field efficacy test:

[0048] Test medicament: propaneamidine water-dispersible granules prepared in Examples 1-5;

[0049] Control agent 1: 2% propaneamidine aqueous solution;

[0050] Control drug 2: 50% Proxaline wettable powder, product of Sumitomo Chemical Co., Ltd., Japan.

[0051] Control drug 3: 40% Xerkol SC, produced by Eigerfort, Germany.

[0052] Control drug 4: 50% carbendazim wettable powder, produced by Jiangsu Jiangyin No. 2 Pesticide Factory.

[0053] Control agent 5: 40% sclerotia net wettable powder, Shandong Shouguang Shuangxing Pesticide Factory.

[0054] Test crops: tomato; cucumber; strawberry

[0055] experimental method:

[0056] Strawberries 6-8 (a.i.) g / mu, cucumbers 8-10 (a.i.) g / mu, tomatoes 10-12 (a.i.) g / mu. Prepare each test agent according to the dosage and water consumption per mu. Clear water is used as the blank control. Each treatment is repeated 4 times, and each plot is repea...

Embodiment 2

[0097] The propaneamidine water-dispersible granules prepared in Example 2 were tested in a spring-stubble greenhouse tomato field in Nanzhuang Township, Yangcun Township, Yangling Demonstration Area, Shaanxi Province. Botrytis cinerea occurred heavily in this tomato field over the years. The soil fertility is medium, pH6.9; clear the diseased fruit before spraying. The control effect on Botrytis cinerea is shown in Table 3.

[0098] Table 3: Efficacy test results of water dispersible granules for controlling Botrytis cinerea 1

[0099]

[0100] Note: In the table, the data in the same column are marked with the same letter, indicating that there is no significant difference at the 0.05 level;

[0101] The results of the drug efficacy test in Table 3 show that under the dosage of 6-12 (ai) g / mu, the control effect of propaneamidine water-dispersible granules on tomato gray mold is more than 70%, which is significantly higher than that of the control agent saccharin The co...

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Abstract

The invention discloses a propamidine water dispersible granule (WDG) and a preparation method thereof. Prepared propamidine water dispersible granules comprise the following raw materials in percentage by weight: 85-90 percent of propamidine, 2.5-5 percent of dispersant, 2.5-5 percent of humectant and 2.5-5 percent of disintegrating agent, and the total percentage of the raw materials is 100. The preparation method comprises the steps as follows: the raw materials in a formula, including the propamidine, the humectant, the dispersant and the disintegrating agent, are uniformly mixed, crushed by an airflow crushing machine, and made into ultra-fine wettable powder, then the ultra-fine wettable powder is added with a certain amount of water, and made into granules via an extrusion type granulator, the granules are dried by an airflow drier, and screened and separated, as a result, the water dispersible granules are obtained. According to the invention, the cost of package and transport can be effectively reduced, the storage stability and the shelf life of the WDG are increased, the safety and the performance of environmental protection in links about the production and the utilization of the propamidine WDG are also improved, and the plant botrytis cinerea pathogenic bacterium can be very efficiently prevented and treated.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, and relates to a propaneamidine water-dispersible granule and a preparation method thereof. technical background [0002] In the chemical structure of saponins, due to the different degrees of lipophilicity of aglycones and the strong hydrophilicity of sugar chains, saponins become a kind of natural surfactant, and the aqueous solution can produce persistent soap-like foam after shaking. This is why it is called saponin. At the same time, saponin also exhibits direct agricultural activities such as: bactericidal, insecticidal and synergistic effects on other pesticides. [0003] As a wetting agent for pesticides, tea saponin has the advantages of fast wetting speed and good dispersibility. When added to pesticides, it can significantly improve the physical and chemical properties of the pesticide liquid, increase the effective deposition amount of the pesticide on the target body, help the...

Claims

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Application Information

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IPC IPC(8): A01N37/52A01N25/14A01N25/30A01P3/00
Inventor 蔡崇林周一万吴华冯俊涛张兴
Owner NORTHWEST A & F UNIV
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