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Application of block macromolecule quaternary ammonium salt in growth inhibition of banana oxysporum

A technology of banana fusarium wilt and quaternary ammonium salt, applied in plant growth regulators, chemicals for biological control, applications, etc.

Active Publication Date: 2016-08-31
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still does not meet the needs of practical application, and it is necessary to develop a preparation that is more environmentally friendly and has a better control effect on the banana Fusarium wilt

Method used

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  • Application of block macromolecule quaternary ammonium salt in growth inhibition of banana oxysporum
  • Application of block macromolecule quaternary ammonium salt in growth inhibition of banana oxysporum
  • Application of block macromolecule quaternary ammonium salt in growth inhibition of banana oxysporum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] The preparation of embodiment 1 block macromolecule quaternary ammonium salt, structure is as figure 1 shown

[0099] 1. Preparation of PDMS-b-(PDMS-g-BC)-b-PDMS:

[0100](1) Protection of aminodisiloxane head (BAPTMDS): in the reaction kettle equipped with mechanical stirring and condenser, feed according to the molar ratio of raw materials BAPTMDS: phthalic anhydride = 1: 2.2, use the total amount of raw materials The raw materials were dissolved in tetrahydrofuran twice the mass, and reacted at 60°C for 4 hours. After the reaction, the solvent THF was distilled off under reduced pressure, the product was dissolved in chloroform, the product was washed 5 times with hot water at 55°C, and the chloroform layer was distilled under reduced pressure to obtain the capped BAPTMDS-PA protected by phthalic anhydride. 2 .

[0101] (2) Synthesis of hydrogen-containing polysiloxane (PA-PDMS-co-PHMS-PA): at 25°C, in a reaction kettle equipped with a mechanical stirring device a...

Embodiment 2

[0131] The method that embodiment 2 block macromolecule quaternary ammonium salts suppresses the mycelia growth of Fusarium wilt of banana:

[0132] 1. The detection process of PDMS-b-(PDMS-g-BC)-b-PDMS inhibiting the mycelium growth of Fusarium wilt

[0133] (1) Preparation of block macromolecule quaternary ammonium salt solution: the measured polysiloxane block copolymer PDMS-b-(PDMS-g-BC) containing grafted benzyl dimethyl ammonium chloride group -b-PDMS was dissolved in sterile water and formulated as 0 (for control), 0.25g / L, 0.5g / L, 0.75g / L, 1.0g / L, 1.25g / L, 1.5g / L. Among them, the number average molecular weight of the graft segment segment PDMS-g-BC is 5.0×10 3 , the length ratio is PDMS:PDMS-g-BC:PDMS=1:5:1, in the block (PDMS-g-BC) containing quaternary ammonium salt group, the chain link grafted with quaternary ammonium salt group The proportion (grafting ratio) of the total number of chain links is 1 / 4.

[0134] (2) Preparation of the culture plate: the prepared...

Embodiment 3

[0145] (1) Prepare PDMS-b-(PDMS-g-BC)-b-PDMS with different grafting ratios, the preparation method is basically the same as Step 1 of Example 1, the difference is that the grafting ratio is 1 / 3(D 4 H :D 4 : Head = 6: 12: 1), 1 / 4 (D 4 H :D 4 : Head = 4.43: 13.29: 1), 1 / 5(D 4 H :D 4 : BAPTMDS-PA 2 =3.51:14.04:1), 1 / 6(D 4 H :D 4 :head=2.91:14.53:1).

[0146] PDMS-b-(PDMS-g-BC)-b-PDMS has the same number average molecular weight, the same structure, and different grafting ratios, and the relationship between the growth inhibition rate of the mycelia of Fusarium wilt and the drug concentration is as follows: Figure 5 shown. The results showed that with the increase of the grafting rate of quaternary ammonium salt groups, the inhibitory effect on the mycelial growth of Fusarium wilt was enhanced, but the enhanced effect was not significant when the solution concentration was high.

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Abstract

The invention discloses application of block macromolecule quaternary ammonium salt in growth inhibition of banana oxysporum. The structural formula of the block macromolecule quaternary ammonium salt is shown as A. The block macromolecule quaternary ammonium salt can be well adhered to the surface of a hydrophobic material, so that growth of the banana oxysporum can be inhibited in liquor, and the banana oxysporum can be prevented and cured effectively on the surface of the hydrophobic material.

Description

technical field [0001] The invention belongs to the technical field of plant protection application of functional polymers, in particular to the use of block macromolecular quaternary ammonium salts in inhibiting the growth of Fusarium wilt of banana. Background technique [0002] Banana Fusarium wilt, commonly known as banana yellow leaf disease or Panama disease, is a soil-borne disease caused by a fungus called Fusarium oxysporium f.sp.cubense that infects the vascular bundles of banana plants. sick. Banana Fusarium wilt infection will cause the diseased plant to wither and the vascular bundles to discolor and rot after infecting bananas, which will cause devastating damage to the plant. Therefore, the disease has become an international phytosanitary object. [0003] Banana Fusarium wilt can be spread over long distances through the transfer and removal of infected banana seedlings, soil, and agricultural machinery; it can spread over close distances through infected w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N55/10A01P3/00C08G77/44
CPCA01N55/00C08G77/44
Inventor 林雅铃周盛文刘琼琼刘杨润琦金莲淳洪双豪雷雨风张安强
Owner SOUTH CHINA AGRI UNIV
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