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Bactericidal composition

A composition and benzamide technology, applied in the field of plant protection, to achieve the effects of increasing the control spectrum, reducing the use cost and reducing the number of times of use

Active Publication Date: 2014-06-25
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 oligosaccharides and the above-mentioned bactericidal ingredients. The inventor has found some unexpected effects through the research on the composition of chitosan oligosaccharides and the above-mentioned bactericidal ingredients.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 Control effect of composition on tomato late 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 test, the tomato plants were basically at the 5-leaf stage, and the incidence of late blight was investigated before the first spraying, and a corresponding single dose and blank control were set up, and the conventional constant spray was used with a hand-held sprayer. -10d and then spray 1 time. 10-14 days after the second spraying, investigate all the leaves of each plant, record the total number of leaves and the number of diseased leaves, and calculate the disease index and control effect according to the following grading method.

[0021] Leaf Grading Method:

[0022] Level 0: no disease

[0023] L...

Embodiment 2

[0035] Example 2 Control Effect of Composition on Cucumber Downy Mildew

[0036] 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, investigate all the leaves of each plant, record the total number of leaves and the number of diseased le...

Embodiment 3

[0051] Example 3 Field effect of composition on wheat powdery mildew

[0052] The field test of wheat powdery mildew was carried out with the composition, and a corresponding single dose and blank control were set up, and a plot of 20m was set up for each dose. 2 . A knapsack sprayer was used for conventional constant spraying, and the test was sprayed once at the booting stage and the early flowering stage, before the drug and 7-10 days after the second spraying, and each treatment was sampled at five points, 50 plants at each point, and all leaves were investigated for each plant. Record and investigate the total number of leaves and the number of diseased leaves, and calculate the disease index and control effect according to the following grading method.

[0053] Leaf Grading Method:

[0054] Level 0: no disease

[0055]Level 1: The connected area of ​​disease spots accounts for less than 1% of the entire leaf area;

[0056] Grade 3: The connected area of ​​disease spo...

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Abstract

The invention belongs to the field of plant protection, and relates to a bactericidal composition. The composition comprises an effective dose of an active component A and an active component B, wherein A is chitosan oligosaccharide and B is selected from one of zoxamide, fenhexamid and spiroxamine. The invention also provides an application of the composition to prevention and treatment of various plant fungal diseases of crops. The composition has a good synergetic effect within a certain proportion range, the anti-disease effect of the composition is improved, and generation of drug resistance of pathogenic bacteria to a medicament is delayed.

Description

technical field [0001] The invention belongs to the field of plant protection, and relates to a bactericidal composition. The composition contains A component and B component, A is chitosan oligosaccharide, and B is selected from one of benzhexamid, fenhexamid, and spirulina , used to control late blight, downy mildew, powdery mildew, gray mold and other diseases. 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 synergist...

Claims

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Application Information

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IPC IPC(8): A01N43/16A01N43/30A01P3/00A01N37/20A01N37/24
Inventor 侯华民张善学
Owner HAINAN ZHENGYE ZHONGNONG HIGH TECH
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