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Sterilization combination containing chitosan oligosaccharide

A composition and chitosan oligosaccharide technology, applied in the direction of fungicides, biocides, biocides, etc., to achieve the effect of reducing the number of times of use, reducing the cost of use, and improving the control effect

Active Publication Date: 2014-04-09
HAINAN ZHENGYE ZHONGNONG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the compound research of chitosan oligosaccharide and the above-mentioned bactericidal ingredients

Method used

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  • Sterilization combination containing chitosan oligosaccharide
  • Sterilization combination containing chitosan oligosaccharide
  • Sterilization combination containing chitosan oligosaccharide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The control effect of embodiment 1 chitosan oligosaccharide composition to rice sheath blight

[0020] A single compound or composition is dissolved in an organic solvent to prepare a 1000 mg / L mother solution. According to the pretest of biological activity determination, a certain amount of the above mother solution was diluted with 0.1% Tween 80 to prepare the required concentration. During the measurement, first spray the medicinal liquid on potted rice plants with the same growth period and growth, after 7 days, spray the mycelia suspension quantitatively for each treatment, after moisturizing for 24 hours, place it in a greenhouse for cultivation, and measure the leaves of the plants after a certain period of time. percentage of infestation. Convert percentages to efficacy using Abbot's formula.

[0021]

[0022] Theoretical control effect (%)=x+y-xy

[0023] x is the control effect of active component A when the concentration is a, and y is the control effe...

Embodiment 2

[0028] The control effect of embodiment 2 chitosan oligosaccharide composition to cucumber downy mildew

[0029] A single compound or composition is dissolved in an organic solvent to prepare a 1000 mg / L mother solution. According to the pretest of biological activity determination, a certain amount of the above mother solution was diluted with 0.1% Tween 80 to prepare the required concentration. During the test, the cucumber plants were basically at the 4-leaf stage, and the incidence of downy mildew was investigated before the first medicine. A potted test of cucumber downy mildew was carried out with the chitosan oligosaccharide composition, and a corresponding single agent and blank control were set up, and a hand-held sprayer was used for conventional constant spraying, and 10 plants were sprayed with each agent, and sprayed again 7-10 days after spraying once. 10-14 days after the second spraying, survey all the leaves of each plant, record the total number of surveyed ...

Embodiment 3

[0044] Embodiment three: chitosan oligosaccharide composition is to wheat smut field test

[0045] A field test of wheat smut was carried out with the composition, and a corresponding single dose and a blank control were set up, and a plot of 20 m2 was set up for each dose. Seed dressing with 20-30 grams (active ingredient) per 100 kilograms of seeds, in the milky stage or mature stage of wheat, sampling at 5 points on the diagonal in each plot, taking 0.5 m2 at each point to investigate the total number of plants and the number of smut plants, and calculate Disease rate.

[0046]

[0047]

[0048] CK—the rate of diseased plants in the blank control area;

[0049] PT—the rate of diseased plants in the chemical treatment area;

[0050] Theoretical control effect (%)=x+y-xy

[0051] x is the control effect of active component A when the concentration is a, and y is the control effect of active component B when the concentration is b. Compare the theoretical effect and ...

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Abstract

The invention provides a sterilization combination containing chitosan oligosaccharide. The sterilization combination is characterized by comprising an effective amount of two active components A and B, wherein the component A is the chitosan oligosaccharide, and the component B is one component selected from fluopicolide, thifluzamide, penflufen and xemium; the mass ratio of the component A to the component B is (1:10)-(10:1). The invention also discloses application of the combination in prevention and treatment of agricultural fungal diseases of crops; the combination achieves a good synergism effect within a certain proportion range, so that the disease prevention effect of the combination is enhanced; the generation of pesticide resistance of pathogenic bacteria to pesticides is delayed.

Description

technical field [0001] The invention relates to a chitosan oligosaccharide bactericidal composition, which is used for preventing and controlling various diseases such as sheath blight, downy mildew, smut, anthracnose, late blight, leaf spot, and scab. Background technique [0002] Compounds from organisms with good biodegradability have aroused great interest of pesticide researchers. Among these compounds, oligochitosan, which has no toxic side effects and is easy to biodegrade, has great potential and becomes a new agent for disease control. Oligochitosan, as an important class of plant-induced disease resistance agents, is derived from the research on oligosaccharides from plants. Studies have shown that oligochitosan can induce and stimulate plants to produce a series of defense responses in the process of resisting pathogenic bacteria. These The synergistic effect of the defense response prevents the spread and invasion of pathogenic bacteria, and achieves the effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/40A01N47/02A01N43/56A01P3/00A01N43/16
CPCA01N43/16A01N47/02A01N2300/00
Inventor 侯华民张善学王少龙陈坚
Owner HAINAN ZHENGYE ZHONGNONG HIGH TECH
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