CN102487968B - Plant source sterilization preparation and application thereof in prevention and treatment of rice sheath blight - Google Patents

Abstract

The invention discloses a plant source fungicidal preparation, which comprises the following components in weight percent: 0.1-50% thymol, 5-30% emulsifier, 0.1-20% azone, 10-60% ethanol, and 0.1% water ~84.8%. The invention also discloses a preparation method of the above-mentioned botanical bactericidal preparation and its application in preventing and treating rice sheath blight. The thymol-based botanical fungicide preparation of the present invention has medicinal ingredients derived from plants with insecticidal functions or their extracts, which can not only effectively prevent and control rice sheath blight, but also have the functions of promoting crop growth and development, increasing production and income, and improving quality. , Improve nutrient utilization efficiency, prevent pests, and have multiple functions such as no pollution. It is suitable for pollution-free, green and organic agricultural production. The preparation has obvious application effects, easy-to-obtain raw materials, simple production process, great market potential, obvious economic and social benefits, and has very broad application prospects.

Description

A botanical fungicide and its application in the control of rice sheath blight

technical field

The invention belongs to the technical field of crop disease prevention and treatment in agricultural production, and in particular relates to a botanical bactericidal preparation and its application in preventing and treating rice sheath blight.

Background technique

Rice sheath blight, commonly known as "flower foot stem", "rotten foot blast", and "moire disease", belongs to tropical diseases and is one of the frequent and recurrent diseases of rice. In the middle of the 1990s, the survey results of the southern rice areas in my country showed that the incidence area of rice sheath blight was 2.07 times that of rice blast, and the loss caused was 1.97 times that of rice blast, and its damage degree has far exceeded that of rice blast. , stripe leaf blight, etc., have become the number one disease of rice, posing a serious threat to high and stable rice yields. In recent years, rice sheath blight is generally more serious due to abnormal climate, increased accumulation of soil bacteria, untimely control measures and extensive management of farmland. The incidence rate is as high as about 60%. In the heavily damaged fields, the plants cannot be heading normally, the seed setting rate is reduced, the grains are not full, or they are seriously lodging, which seriously affects the rice yield. Rice sheath blight is distributed in all rice areas in my country, and it is common and harmful in the rice areas south of the Yangtze River. In Northeast China, Liaoning Province has a severe occurrence and has become one of the main diseases of local rice. Heilongjiang Province has also happened in recent years. After rice plants are damaged, the shriveling rate increases. If the thousand-grain weight decreases, if it causes lodging and stem and leaf rot, the loss will be even greater.

In recent decades, people have carried out a series of chemical control technology research on the control of rice sheath blight, and achieved certain results. At present, the chemical pesticide control of rice sheath blight is mainly based on the chemical pesticide Jinggangmycin. Jinggangmycin is the main drug for the control of rice sheath blight. The drug has systemic conductivity and has both preventive and therapeutic effects, but its duration is short. In recent years, when rice sheath blight has occurred seriously, The control effect of Jinggangmycin is even more difficult to guarantee. At the same time, with the use of chemical pesticides year by year, the resistance of sheath blight is gradually increasing. For this reason, farmers increase the use of pesticides. If the amount is excessively increased, it will not only increase the amount of pesticide residues in crops, but also inhibit the growth of beneficial microorganisms in the soil. , and will pollute the environment and increase production costs. As a result, the use and dependence of pesticides presents a vicious cycle.

With the frequent occurrence of food safety incidents and the country's emphasis on food safety, it has become a hot spot in agricultural scientific research to develop efficient and environmentally friendly plant-derived biological pesticides to replace highly toxic and high-residue chemical pesticides. Biopesticides made by improving natural compounds of plant origin, on the one hand, have no harm to the fruits, flowers, and leaves of plants, are safe to humans and animals, and have the advantages of high efficiency, no residue, no harm, and no drug resistance; on the other hand, It can effectively improve the quality of agricultural products while controlling diseases.

Contents of the invention

The technical problem to be solved by the present invention is to provide a thymol-based botanical bactericidal preparation, which is a new multifunctional environment-friendly preparation integrating antibacterial, nutrition and quality improvement.

The technical problem to be solved in the present invention is to provide a preparation method of the above-mentioned thymol-based plant source fungicide.

The final technical problem to be solved by the present invention is to provide the application of the above-mentioned botanical fungicides in the prevention and treatment of rice sheath blight.

In order to solve the problems of the technologies described above, the technical scheme adopted in the present invention is as follows:

A plant source fungicide preparation, which comprises the following components in weight percent: 0.1-50% thymol, 5-30% emulsifier, 0.1-20% azone, 10-60% ethanol, and 0.1-84.8% water.

The plant-derived bactericidal preparation preferably contains the following components in weight percent: 0.5-5% thymol, 10-20% emulsifier, 1-2% azone, 20-40% ethanol, and 33-68% water.

Wherein, the emulsifier is styrene-ethylphenol polyoxyethylene ether, styrene-ethylphenol polyoxyethylene polyoxypropylene ether, aralkylphenol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether phosphate, Calcium alkylnaphthalene sulfonate, castor oil ethylene oxide adduct, aralkylphenol ethoxylates, fatty alcohol ethoxylates, alkylphenol formaldehyde resin ethoxylates and calcium dialkylbenzene sulfonate one or a mixture of several.

The above thymol can be compounded with Jinggangmycin and propiconazole.

The preparation method of the above-mentioned botanical bactericidal preparation, prepare raw materials thymol, emulsifier, azone, ethanol and water according to the formula quantity, add thymol to part of ethanol and mix uniformly to form solution A, then use emulsifier and azone Dissolve the remaining ethanol to form solution B, and then mix solution A, solution B and water evenly.

Wherein, ethanol is used twice (being above-mentioned part ethanol and above-mentioned remaining ethanol), and each consumption needs to guarantee the fully dissolving of dissolved raw material, and the sum of two consumptions is the ethanol raw material total amount of formula quantity.

Application of the above-mentioned botanical bactericidal preparation in promoting the growth of rice.

The application of the above-mentioned botanical fungicide preparation in the prevention and treatment of rice sheath blight.

Beneficial effects: The medicinal ingredients of the thymol-based botanical fungicidal preparation of the present invention are derived from plants with insecticidal functions or their extracts, which can not only effectively prevent and control rice sheath blight, but also have the functions of promoting crop growth and development, increasing production and income , Improve quality, increase nutrient utilization efficiency, control pests, and have multiple functions such as pollution-free, suitable for pollution-free, green and organic agricultural production. The preparation has obvious application effects, easy-to-obtain raw materials, simple production process, great market potential, obvious economic and social benefits, and has very broad application prospects.

Detailed ways

The present invention can be better understood from the following examples. However, those skilled in the art can easily understand that the description of the embodiments is only for illustrating the present invention, and should not and will not limit the present invention described in the claims.

Example 1:

A kind of plant source bactericidal preparation, it comprises the component of following percentage by weight: Thymol 1%, emulsifier (emulsifier is phenethylphenol polyoxyethylene ether) 15%, azone 2%, ethanol 30%, water 52%.

The preparation method of the above-mentioned plant-derived bactericidal preparation, prepare raw materials thymol, emulsifier, azone, ethanol and water according to the formula amount, add thymol to 1/4 amount of ethanol and mix uniformly to form solution A, and then emulsifier Dissolve azone and azone with the remaining 3/4 amount of ethanol to form solution B, and then mix solution A, solution B and water evenly.

Example 2:

A kind of plant source bactericidal preparation, it comprises the component of following percentage by weight: Thymol 2%, emulsifying agent (emulsifying agent is that emulsifying agent is aralkylphenol polyoxyethylene ether phosphoric acid ester and alkylphenol polyoxyethylene ether phosphoric acid ester Ester (1:1 mixture by weight) 20%, azone 2%, ethanol 40%, water 36%.

The preparation method of the above-mentioned plant-derived bactericidal preparation, prepare raw materials thymol, emulsifier, azone, ethanol and water according to the formula quantity, add thymol to 1/2 amount of ethanol and mix uniformly to form solution A, and then emulsifier Dissolve azone and azone with the remaining 1/2 amount of ethanol to form solution B, and then mix solution A, solution B and water evenly.

Example 3:

A plant source fungicide preparation, which comprises the following components in percentage by weight: thymol 0.5%, emulsifier (emulsifier is alkylphenol polyoxyethylene ether phosphate) 10%, azone 2%, ethanol 30%, Water 57.5%.

The preparation method is the same as in Example 2.

Example 4:

A kind of plant source bactericidal preparation, it comprises the component of following percentage by weight: Thymol 0.1%, emulsifying agent (emulsifying agent is calcium alkylnaphthalene sulfonate and castor oil ethylene oxide adduct by weight ratio 1: 2 mixture) 30%, azone 0.1%, ethanol 60%, water 9.8%.

The preparation method is the same as in Example 2.

Example 5:

A kind of plant source bactericidal preparation, it comprises the component of following percentage by weight: Thymol 50%, emulsifying agent (emulsifying agent is aralkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and alkylphenol formaldehyde resin polyoxyethylene ether) Oxyethylene ether (1:2:1 mixture by weight) 5%, azone 20%, ethanol 10%, water 15%.

The preparation method is the same as in Example 2.

Example 6: Thymol-based botanical fungicides promote crop growth and improve quality.

Recipe I: 1/2 Hoagland nutrient solution.

Formula II: the botanical fungicide preparation of thymol prepared in Example 1.

Select a field to design three treatments: treatment 1: control (control CK is clear water); treatment 2: formula I; treatment 3: formula II. Each treatment was repeated 3 times, and the treatment solution was sprayed every 10 days, and the analysis was carried out after 5 consecutive sprays.

Table 1 Effects of different treatments on rice related yield indicators

It can be seen from Table 1 that the number of panicles, single panicle weight, thousand-grain weight, seed setting rate and yield of rice increased by 4.7%, 9.9%, 10.4%, 8.1% and 12.5% respectively after formula I treatment; The number, weight per ear, thousand-grain weight, seed setting rate and yield increased by 13.4%, 32.3%, 23.1%, 12.8% and 23.8% respectively compared with the control.

It can be known from the above that the treatment with formula II has the best effect on rice growth.

Example 7: Control effect of thymol-based botanical fungicides on crop rice sheath blight.

Formula I: 5% Jinggangmycin aqueous solution.

Formula II: the botanical fungicide preparation of thymol prepared in Example 1.

Choose diseased field piece design four and handle: handle 1: contrast (contrast CK is clear water); Process 2: formula I;

3: Formulation II. Each treatment was repeated 3 times, and the treatment solution was sprayed every 7 days, and the analysis was carried out after 3 consecutive sprays.

test methods:

Determination of disease index and control effect: refer to Dou Ruimu's method. (Dou Ruimu. Control effect of three endophytic bacteria on tomato gray mold. Henan Agricultural Sciences, 2010, 4: 77-79.)

It can be known from Table 2 that on rice, the control effect of formula I on rice sheath blight is 48.38%; the control effect of formula II on rice sheath blight is 77.22%.

It can be seen from the above that the control effect of rice sheath blight on rice is best treated with formula II.

Table 2 Control effect of different treatments on rice sheath blight

Claims (1)

1. Application of a botanical fungicide in promoting the growth of rice; The plant-derived bactericidal preparation comprises the following components in weight percent: 0.1-50% thymol, 5-30% emulsifier, 0.1-20% azone, 10-60% ethanol, and 0.1-84.8% water; Wherein, the emulsifier is phenylethylphenol polyoxyethylene polyoxypropylene ether, aralkylphenol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether phosphate, alkylnaphthalene sulfonate calcium, castor oil One or a mixture of ethylene oxide adducts, aralkylphenol polyoxyethylene ethers, fatty alcohol polyoxyethylene ethers, alkylphenol formaldehyde resin polyoxyethylene ethers and calcium dialkylbenzenesulfonate .