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Composite bactericide containing solidago canadensis extract

A technology of compound fungicides and extracts, applied in the directions of fungicides, biocides, biocides, etc., can solve the problem of low activity of fungicides, reduce the use, be beneficial to pollution-free agricultural production, and effectively kill insects and prevent effect of effect

Inactive Publication Date: 2014-04-09
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many components with physiological activity have been found in Solidago canadensis, studies have only proved partial activity, and no fungicide products that can be applied to agricultural production have been made using the extract of the plant; in addition , although the extract of Solidago canadensis has certain antibacterial activity, it still has the disadvantages of low activity as a fungicide

Method used

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  • Composite bactericide containing solidago canadensis extract
  • Composite bactericide containing solidago canadensis extract
  • Composite bactericide containing solidago canadensis extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Preparation of Solidago canadensis Extract

[0035] Clean the fresh Solidago canadensis, dry and crush it to obtain powder, weigh 10kg of powder and soak it in 20kg of anhydrous methanol for 12h at 25~30℃, filter, take the filter cake and add 20kg of anhydrous methanol to extract under the same conditions 8h, filter again, take the filter cake filtered again and add 20kg of anhydrous methanol to leach for 8h under the same conditions, filter three times, combine all the filtrates obtained by three extractions, filter, concentrate under vacuum and reduce pressure until no solvent flows out, that is, methanol is removed (Methanol is recovered and recycled), the concentrate is obtained, and the concentrate is taken to prepare 500 grams of Solidago canadensis extract.

Embodiment 2

[0036] Example 2: Compound effect of Solidago canadensis extract and several chemical fungicides

[0037] The solidago canadensis extract prepared by the method in Example 1 was mixed with fungicides (carbendazim, thiophanate-methyl, flusilazole or chlorothalonil) according to the mass ratio shown in Table 1 to test the co-toxicity coefficient. See: (South China Agricultural University. Phytochemical Protection [M] 2nd Edition [M]. Beijing: Agricultural Publishing House, 1990), the results are shown in Table 1.

[0038] Table 1 Synergistic effect of Solidago canadensis extract and several pesticides

[0039]

[0040]

[0041] *Note: The co-toxicity coefficient is greater than 100, indicating that the combination of the two has a synergistic effect.

Embodiment 3

[0042] Example 3: Composite fungicide (product one)

[0043] 10 grams of Solidago canadensis extract prepared by the method of Example 1, 20 grams of carbendazim, 5 grams of sodium lignosulfonate, 2 grams of dispersant NNO, 0.5 grams of sodium lauryl sulfate, light calcium carbonate supplemented to 100 grams, the above-mentioned samples were thoroughly mixed and then jet-milled to make (pesticide) wettable powder with a mass concentration of 30%, that is, compound fungicide wettable powder.

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Abstract

The invention discloses a composite bactericide containing a solidago canadensis extract. The composite bactericide consists of the following raw materials in percentage by mass: 5 to 50 percent of solidago canadensis extract, 1 to 70 percent of bactericide and the balance of other fillers. According to the composite bactericide, a bactericide product which can be produced actually and can be applied to the prevention and control of crop diseases is developed by utilizing the bactericidal activity of the solidago canadensis extract and the synergistic effect of the solidago canadensis extract on a chemical bactericide; and the use of the chemical bactericide is reduced, pollution-free agricultural production is facilitated, and a new concept is provided for the comprehensive prevention and control of solidago canadensis.

Description

(1) Technical field [0001] The invention relates to a natural fungicide, in particular to a composite fungicide mainly composed of solidago canadensis extract. (2) Background technology [0002] Solidago canadensis is native to North America and is a perennial herb of the genus Solidago in the Asteraceae family. Introduced into my country as a flower plant in 1935, it was first cultivated in Shanghai and Nanjing, and later grew wild. Solidago canadensis reproduces in two ways: rhizomes and seeds. Its reproduction and survival ability are extremely strong. At the same time, due to the lack of natural enemies, it is easy to become a dominant species, competing with surrounding plants for soil, nutrients, water and space, causing other species to withdraw. It poses a threat to biodiversity and has become one of the most serious invasive alien species in China. [0003] In order to prevent further spread, extensive domestic research has been conducted on the prevention and con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N65/12A01N55/10A01N47/34A01N47/18A01N37/34A01P3/00
CPCY02A50/30
Inventor 王世贵陈列忠迟名
Owner HANGZHOU NORMAL UNIVERSITY