阅读说明：本技术 一种针对小麦赤霉病的拌种剂及其制备方法 (Seed dressing agent for wheat scab and preparation method thereof ) 是由 凌新萍 周平运 杨军 胡鉴 崔奇 于 2019-12-04 设计创作，主要内容包括：本发明涉及一种针对小麦赤霉病的拌种剂,所述拌种剂包括以下重量份的原料：25-35份的丙硫菌唑,5-15份的氨基寡糖素,1900-2100份的水。解决了现有的灭菌剂药效并不持久,且药效不强,在施药期间,不能对小麦赤霉病产生有力的抵抗性的问题。(The invention relates to a seed dressing agent for wheat scab, which comprises the following raw materials in parts by weight: 25-35 parts of prothioconazole, 5-15 parts of amino-oligosaccharin and 1900-2100 parts of water. Solves the problems that the prior sterilizing agent has non-durable and non-strong drug effect and can not generate strong resistance to wheat scab during the drug application period.)

1. The seed dressing agent for wheat scab is characterized by comprising the following raw materials in parts by weight: 25-35 parts of prothioconazole, 5-15 parts of amino-oligosaccharin and 1900-2100 parts of water.

2. The seed dressing agent for wheat scab according to claim 1, wherein the seed dressing agent comprises the following raw materials: 28-32 parts of prothioconazole, 8-13 parts of amino-oligosaccharin and 1950-2050 parts of water.

3. The seed dressing agent for wheat scab according to claim 1, wherein the seed dressing agent comprises the following raw materials: 30 parts of prothioconazole, 10 parts of amino-oligosaccharin and 2000 parts of water.

4. A method for preparing a seed dressing agent for wheat scab according to any one of claims 1 to 3, comprising the steps of:

(1) adding prothioconazole into water according to a proportion, stirring, and fully mixing the prothioconazole and the water to obtain a primary mixed solution;

(2) and (2) adding the amino-oligosaccharin into the primary mixed solution obtained in the step (1) according to a ratio, and stirring to fully mix the amino-oligosaccharin into the primary mixed solution to obtain the stirring agent.

5. The method for preparing a seed dressing agent for wheat scab according to claim 4, wherein the stirring time in the step (1) is 30-40 minutes, and the stirring speed is 20-30 r/min.

6. The method for preparing a seed dressing agent for wheat scab according to claim 4, wherein the stirring time in the step (2) is 1-1.5 hours, and the stirring speed is 20-30 r/min.

7. The method for preparing a seed dressing agent for wheat scab according to claim 4, wherein the temperature is controlled to be 25-30 ℃ during stirring in both step (1) and step (2).

8. The method for preparing a seed dressing agent for wheat scab according to claim 4, wherein after the stirring agent is prepared in the step (2), the stirring agent is filled into a spray bottle.

Technical Field

The invention relates to the technical field of crop disease prevention, in particular to a seed dressing agent for wheat scab and a preparation method thereof.

Background

Wheat scab is also called wheat head withering, wheat head rotting and red wheat head, and is one of the main diseases of wheat. Wheat scab is common worldwide and is mainly distributed in humid and semi-humid areas, especially in temperate areas with humid and rainy climate. The seedling can be damaged from seedling to ear emergence, and the seedling is mainly withered, stalk-base rot, stalk rot and ear rot, wherein the most serious damage is ear rot. Seedling rot is caused by infection of seeds with bacteria or disease residues in soil. The bud is browned, then the root cap is rotten, the disease seedling is yellow and thin in the light case, the disease seedling dies in the heavy case, and pink mildew-like substances are generated when the humidity of the dead seedling is high.

At present, the bactericidal agent adopted for preventing and sterilizing the wheat scab has weak and durable pesticide effect, and the bactericidal agent cannot generate powerful resistance to the wheat scab during the pesticide application period, so the improvement is urgently needed.

Disclosure of Invention

Aiming at the problems mentioned in the background technology, the invention provides a seed dressing agent for wheat scab, which solves the problems that the existing sterilizing agent has non-durable and non-strong drug effect, and can not generate strong resistance to the wheat scab during the application period.

In order to achieve the aim, the invention provides a seed dressing agent for wheat scab, which comprises the following raw materials in parts by weight: 25-35 parts of prothioconazole, 5-15 parts of amino-oligosaccharin and 1900-2100 parts of water.

A seed dressing agent for wheat scab comprises the following raw materials: 28-32 parts of prothioconazole, 8-13 parts of amino-oligosaccharin and 1950-2050 parts of water.

A seed dressing agent for wheat scab comprises the following raw materials: 30 parts of prothioconazole, 10 parts of amino-oligosaccharin and 2000 parts of water.

The technical principle of the invention is that prothioconazole and amino-oligosaccharin are used as main components, wherein demethylation of prothioconazole ensures that the prothioconazole has good systemic activity, good safety to crops and good disease prevention and treatment effects, amino-oligosaccharin refers to oligosaccharide formed by connecting D-glucosamine with β -1.4 glycosidic bond, chitosan is degraded by chitin to obtain chitosan, and then the oligosaccharide is degraded, or low-toxicity fungicide is extracted by microbial fermentation, amino-oligosaccharin can inhibit growth of some pathogenic bacteria, influence fungal spore, induce variation of hypha morphology, change of intraspore biochemistry and the like, can excite genes in plants, generate chitinase, glucanase, protective agent, PR protein and the like with disease resistance, has cell activation effect, is beneficial to recovery of damaged plants, promotes rooting and seedling strengthening, enhances stress resistance of crops, promotes plant growth and growth, has sterilization, silicic acid and sterilization effects, not only has extremely strong virus removal effect on fungi, bacteria, virus removal effect, but also has nutrition regulation effect on cell walls of oligosaccharins, further promotes the growth of wheat, inhibits growth of wheat and wheat germ-resistant bacteria, inhibits the wheat germ-resistant bacterium reproduction, and the wheat germ-resistant bacterium cell wall, and the wheat germ-resistant oligosaccharin-resistant bacterium cell-resistant bacterium cell-capable of wheat-capable of promoting wheat-capable of preventing wheat-resistant bacterium, and-resistant bacterium-capable of preventing wheat-capable of preventing wheat.

Compared with the traditional sterilizing agent:

the invention utilizes the synergistic effect between the prothioconazole and the amino-oligosaccharin to ensure that the stirring agent has good treatment effect on wheat scab, meanwhile, the pesticide effect is durable, the seed dressing agent and wheat seeds are stirred and mixed only before wheat is sown, and other pesticide effect protection is not needed at the later stage to greatly reduce the prevalence rate of the wheat scab and improve the yield of the wheat.

Further, a preparation method of the seed dressing agent for wheat scab is characterized by comprising the following steps:

(1) adding prothioconazole into water according to a proportion, stirring, and fully mixing the prothioconazole and the water to obtain a primary mixed solution;

(2) and (2) adding the amino-oligosaccharin into the primary mixed solution obtained in the step (1) according to a ratio, and stirring to fully mix the amino-oligosaccharin into the primary mixed solution to obtain the stirring agent.

Furthermore, the stirring time in the step (1) is 30-40 minutes, and the stirring speed is 20-30 r/min. Under the control of the stirring efficiency and time, the prothioconazole and the water are mixed more uniformly.

Furthermore, the stirring time in the step (2) is 1-1.5 hours, and the stirring speed is 20-30 r/min. The longer time for mixing and stirring the amino-oligosaccharin in the primary mixed solution is set so as to ensure that the amino-oligosaccharin and prothioconazole in the primary mixed and stirred solution react more fully and further improve the efficacy of the stirring agent.

Furthermore, the temperature is controlled to be 25-30 ℃ when stirring in the step (1) and the step (2). Through experimental detection, the prothioconazole is dissolved faster in the temperature range, the dissolving effect is better, and the dissolving speed is improved; meanwhile, under the temperature condition, the reaction effect between the prothioconazole and the amino-oligosaccharin is better, and the reaction is more sufficient.

Further, after the stirring agent is prepared in the step (2), the stirring agent is filled into a spray bottle. When the later stage is stirred, the seed dressing agent is stirred into the wheat seeds in a spraying mode, so that the mixing effect is further improved, the wheat seeds and the seed dressing agent are mixed more uniformly, and the mixing effect is better.

In summary, compared with the prior art, the invention has the following beneficial effects:

(1) the invention utilizes the synergistic effect between the prothioconazole and the amino-oligosaccharin to ensure that the stirring agent has good treatment effect on wheat scab, meanwhile, the pesticide effect is durable, the seed dressing agent and wheat seeds are stirred and mixed only before wheat is sown, and other pesticide effect protection is not needed at the later stage to greatly reduce the prevalence rate of the wheat scab and improve the yield of the wheat.

(2) According to the invention, the reaction of the amino-oligosaccharin and the prothioconazole is more sufficient by controlling the stirring time and the stirring speed in the preparation process of the stirring agent, and the drug effect of the stirring agent is further improved.

(3) The temperature in the stirring agent manufacturing process is determined, so that the amino-oligosaccharin and the prothioconazole are dissolved more sufficiently, the reaction effect is better, and the prepared stirring agent has stronger drug effect.

Detailed Description

All features disclosed in this specification may be combined in any combination, except features and/or steps that are mutually exclusive.

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to specific examples.