CN102108033B - Chitin iodine aqua - Google Patents

Abstract

The present invention provides a chitosan iodine aqueous solution and a preparation method thereof, which comprises an effective amount of a thickener, a surfactant and a diluent, and also comprises an effective amount of effective ingredients chitosan, organic iodine and a substance containing plant nutrients. The preparation method uniformly mixes the thickener, surfactant, diluent, chitosan, organic iodine and the substance containing plant nutrients at a temperature of 80 to 98° C. The chitosan iodine aqueous solution of the present invention can exert the rapid effect of iodine on the prevention and treatment of crop diseases, while maintaining the sustainability of chitosan on the prevention and treatment of diseases; through the supplement of partial nutrition and the effect of chitosan inducing resistance, the effect of comprehensive prevention and treatment of crop diseases is achieved, and the chitosan iodine aqueous solution is a biogenic pesticide with the dual-effect function of medicine and fertilizer.

Description

Chitin iodine solution

technical field

The invention relates to a chitin iodine aqueous solution and a preparation method thereof.

Background technique

Chitin (chemical name: poly-N-acetylglucosamine, Chitosan) is a polysaccharide biopolymer widely found in lower biological fungi, algae cells, arthropod shrimp, crabs, and insects in nature. The outer shell, the inner shell and cartilage of molluscs (such as squid and squid), the cell wall of higher plants, etc., the annual biosynthetic resources of chitin can reach 200 billion tons, which is the second largest biological resource after plant fiber on the earth. An inexhaustible biological resource for human beings, chitin was discovered by the French scholar Braconno in 1811, and was extracted from the crustacean shell by Odier in 1823, and named CHITIN, translated as chitin .

The application of chitin in agriculture can be used as a pest control agent: 1) plant pathogen growth inhibitor: between plant pathogens and parasitic plants, chitin can hinder the spore germination and growth of plant pathogens, and protect against pathogenic bacteria infection The function is inductive, and its effect varies with the concentration of chitosan and the degree of deacetylation. 2) Crop disease resistance inducer: chitin can induce the activity of chitinase in crops, and these enzymes can react with chitin in the skin of plant pathogenic bacteria or pests, and prevent it from invading plant tissues, thus enhancing the plant's own resistance to disease. The enemy's defense ability. 3) Seed treatment agent: Chitin is used in the seed treatment (soaking, seed dressing, coating) of various grain and vegetable crops, which can promote early germination of seeds, stimulate disease resistance, and improve yield and quality. Chitin can form a protective film on the surface of the seeds, which is beneficial to maintain the moisture of the seeds, and can absorb the moisture in the environment for the needs of the crops. If the soil moisture is too much, it can block the moisture and prevent the seeds from rotting, which is beneficial to the germination and growth of the seeds. germination. These enzymes react with the chitin in the coat of plant pathogens or pests and prevent their invasion into plant tissues.

Iodine is a broad-spectrum disinfectant, which has a killing effect on most bacteria, fungi and viruses, mainly halogenated proteins, which produce precipitation.

There is no relevant report about chitin iodine water agent at present.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a chitin-iodine aqueous solution that can exert the quick-acting effect of iodine on crop disease prevention and control, and can maintain the continuity of chitin on disease control at the same time, and has the dual-effect function of medicine and fertilizer.

Another object of the embodiments of the present invention is to provide a preparation method of the above-mentioned chitin iodine solution.

The chitin iodine aqueous solution according to the embodiment of the present invention includes an effective amount of a thickener, a surfactant and a diluent, and also includes an effective amount of active ingredients chitin, organic iodine and substances containing plant nutrients.

The preparation method of the chitin iodine water agent according to the embodiment of the present invention, the method is to mix thickener, surfactant, diluent, chitin, organic iodine and substances containing plant nutrient elements uniformly at a temperature of 80-98°C .

The chitin iodine water agent of the present invention can exert the quick-acting effect of iodine on crop disease prevention and control, and at the same time maintain the continuity of chitin on disease prevention and control; through the supplement of part of nutrition and the role of chitin inducing resistance, comprehensive prevention and control of crop diseases can be achieved It is a kind of biological source pesticide with double-effect function of medicine and fertilizer.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The chitin iodine aqueous solution according to the embodiment of the present invention includes an effective amount of a thickener, a surfactant and a diluent, and also includes an effective amount of active ingredients chitin, organic iodine and substances containing plant nutrients. The chitin iodine water agent can not only exert the quick effect of iodine on crop disease control, but also maintain the continuity of chitin on disease control; through the supplement of some nutrients and the role of chitin inducing resistance, the effect of comprehensive control of crop diseases can be achieved. It is a kind of biological source pesticide with double effect of medicine and fertilizer.

The chitin iodine aqueous solution of the embodiment of the present invention may also include an effective amount of antifreeze. The above-mentioned substances containing phytonutrient elements include urea, potassium nitrate and zinc sulfate, and the mass percentage content of each component in the chitin iodine water solution is as follows:

Chitin 1～5%

Organic iodine 0.1～1.5%

Urea 1～5%

Potassium nitrate 1～5%

Zinc sulfate 1～3%

Antifreeze 2%～6%

Thickener 0.1%～0.8%

Surfactant 3～8%

Thinner 65.7～90.8%.

Furthermore, the degree of deacetylation of chitin is preferably 10-70%, and the molecular weight is 30-200KD.

In the chitin iodine aqueous solution according to the embodiment of the present invention, the organic iodine is an organic iodine commonly used in the art, without special limitation, preferably tetraalkylammonium complex iodine, polyalcohol ether iodine, povidone iodine and quaternary ammonium salt One or more of complex iodides.

The above-mentioned antifreezing agent is a commonly used antifreezing agent in the field, without special limitation, preferably one or more of ethylene glycol, propylene glycol, glycerol, polyethylene glycol, and polyethylene glycol methyl ether.

The above-mentioned thickener is a commonly used thickener in this field, without special limitation, preferably one or more of xanthan gum, carboxymethyl cellulose, methyl cellulose and polyvinyl acetate.

Above-mentioned surfactant is surfactant commonly used in this area, is preferably lignosulfonate, sodium lauryl sulfate, fatty acid sulfate, fatty alcohol polyoxyethylene, sodium dibutylnaphthalenesulfonate and lauryl One or more of polyoxyethylene ether phosphates.

The above diluent is preferably water.

The embodiment of the present invention also provides a preparation method of the above-mentioned chitin iodine water, the method is, thickener, surfactant, diluent, chitin, organic iodine and substances containing plant nutrients at 80-98 Mix evenly under the temperature condition of ℃, preferably 85～95℃.

The percentages involved in the following examples are all percentages by weight, the degree of deacetylation of chitin involved is 10-70%, and the molecular weight of the polymer is between 30-200KD.

Example 1

Prepare chitin iodine water agent according to the following ratio and method

Chitin 3.5%

Povidone-iodine 1.5%

Urea 5%

Potassium nitrate 5%

Zinc sulfate 1%

Polyethylene glycol 2%

Methylcellulose 0.1%

Lignosulfonate 3%

Water makes up 100%

Pour the above materials into a reaction kettle with a heating and stirring device, and control the temperature at 95°C. After 60 minutes, the resulting aqueous solution is the product. In practical application, it is used to prevent and treat rice flax spot disease. The area of the test plot is 50m2. It is used in the early stage of the disease, and the leaves are sprayed. The disease index is investigated 3, 5, 7, and 60 days after the application. The disease index of each treatment is compared with the blank control. Calculating the control effect, the results show that the control effect of the present embodiment 5% chitin iodine solution 100-150 mg/L (active ingredient dosage) is 82-94% (see Table 1).

Treatment 1 adopts the spraying of the active ingredient content of 100ppm chitin iodine water agent of the present embodiment;

Treatment 2 adopts the spraying of the active ingredient content of 150ppm chitin iodine water agent of the present embodiment;

Treatment 3 Spray 5% chitin with 200ppm active ingredient content; (use chitin with a deacetylation degree of 10-70% and a molecular weight of 30-200KD to prepare a 5% chitin solution and then dilute it 250 times for spraying)

Blank control 50 kg of sprayed clear water per mu.

Table 1 Comparison of control effects on rice flax spot disease

deal with Number of investigated plants 3 days anti-effect (%) 5 days prevention effect (%) 7 days prevention effect (%) 60 days prevention effect (%)

processing 1 120 72.2 78.5 87.3 75.3 processing 2 120 82.5 85.7 94.2 76.4 processing 3 120 55.7 60.3 65.5 68.7 blank control 120

Example 2

Prepare chitin iodine water agent according to the following ratio and method

Chitin 2%

Povidone-iodine 1%

Urea 8%

Potassium nitrate 5%

Zinc sulfate 1%

Polyethylene glycol 1%

Methylcellulose 0.1%

Lignosulfonate 1%

Water makes up 100%

Pour the above materials into a reaction kettle with a heating and stirring device, control the temperature and keep it at 85°C, and after 45 minutes, the resulting aqueous solution is the product. In practical application, it is used to prevent and control cotton wilt disease caused by Fusarium oxysporum. The area of the test plot is 50m ² . Treat the disease index and compare the blank control to calculate the control effect, 3% chitin iodine solution is used at 50-100 mg/L (active ingredient dosage), and the control effect is 65-80% (Table 2).

Process 1 adopt present embodiment chitin iodine aqueous solution to dilute 600 times (50mg/L active ingredient content) irrigation root;

Process 2 Use the chitin iodine water solution of this embodiment to dilute 300 times (100mg/L active ingredient content) to irrigate the roots;

Treat 3 3% chitin diluted 100 times (300mg/L active ingredient content) to irrigate the roots. (Use chitin with a degree of deacetylation of 10-70% and a molecular weight of 30-200KD to prepare a 3% chitin solution and then dilute it 100 times).

The blank control was irrigated with water.

Table 2 Comparison of Control Effects on Cotton Fusarium Wilt

deal with Number of predrug disease strains 3 days anti-effect (%) 5 days prevention effect (%) 7 days prevention effect (%) 60 days prevention effect (%) processing 1 18 50.2 61.5 75.2 68 processing 2 16 55.5 65.7 80.2 74 processing 3 17 30.2 35.1 45.5 38.3 blank control 15

Example 3

Prepare chitin iodine water agent according to the following ratio and method

Chitin 5%

Povidone-iodine 1.5%

Urea 5%

Potassium nitrate 3%

Zinc sulfate 1%

Polyethylene glycol 1%

Methylcellulose 0.1%

Lignosulfonate 2%

Water makes up 100%

Pour the above materials into a reaction kettle with a heating and stirring device, and keep the temperature at 92°C. After 120 minutes, the resulting aqueous solution is the product. In actual application, it is used to prevent and control cucumber downy mildew (Cucumberdowny mildew). The area of the test plot is 50m ² . It is used in the early stage of the disease and sprayed on the leaves. The disease index is investigated 3, 5, 7, 60, and 120 days after the application. The disease index is compared with the blank control to calculate the control effect, and the results show that the control effect of the 6.5% chitin iodine water agent of the present embodiment with 150～200mg/L (active ingredient dosage) for foliar spraying is 75～90% (Table 3).

Process 1 adopt the present embodiment chitin iodine water spray with 150ppm active ingredient content;

Process 2 adopt the present embodiment chitin iodine water spray with 200ppm active ingredient content;

Treatment 3 6.5% chitin spray with 250ppm active ingredient content (use chitin with a deacetylation degree of 10-70% and a molecular weight of 30-200KD to prepare a 6.5% chitin solution and then dilute it 260 times for spraying)

Blank control Mu spray water 50 kg

Table 3 Comparison of control effects on cucumber downy mildew

deal with Number of predrug disease strains 3 days anti-effect (%) 5 days prevention effect (%) 7 days prevention effect (%) 60 days prevention effect (%) 120 days prevention effect (%) processing 1 19 70.8 80.5 85.6 82.3 72.6 processing 2 20 75.5 85.7 89.9 85.2 72.8 processing 3 18 38.7 36.3 30.7 20.7 15.2 blank control 17

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (8)

1. A chitin iodine aqueous agent, which includes an effective dose of a thickener, a surfactant and a diluent, and also includes an effective dose of an active ingredient chitin, organic iodine and a material containing plant nutrients; The chitin iodine aqueous solution also includes an antifreeze, and the plant nutrient-containing substance includes urea, potassium nitrate and zinc sulfate, and the mass percentage content of each component in the chitin iodine aqueous solution is as follows:

2. The chitin iodine solution according to claim 1, characterized in that: wherein, the chitin deacetylation degree is 10-70%, and the molecular weight is 30-200KD. 3. chitin iodine water according to claim 1 is characterized in that, wherein, said organic iodine is tetraalkylammonium complex iodine, polyalcohol ether iodine, povidone iodine and quaternary ammonium salt complex iodide one or more of them. 4. chitin iodine water according to claim 1, is characterized in that, wherein, described antifreezing agent is one of ethylene glycol, propylene glycol, glycerol, Polyethylene Glycol and Polyethylene Glycol Methyl Ether species or several. 5. chitin iodine water according to claim 1, is characterized in that, wherein, described thickener is one of xanthan gum, carboxymethyl cellulose, methyl cellulose and polyvinyl acetate or several. 6. chitin iodine water agent according to claim 1, is characterized in that, wherein, described tensio-active agent is lignosulfonate, sodium lauryl sulfate, fatty acid sulfate, fatty alcohol polyoxyethylene, One or more of sodium dibutylnaphthalene sulfonate and polyoxyethylene lauryl ether phosphate. 7. chitin iodine aqueous agent according to claim 1, is characterized in that, described diluent is water. 8. a preparation method of chitin iodine water as claimed in claim 1, is characterized in that, the method is, thickener, tensio-active agent, diluent, chitin, antifreeze, organic iodine and plant-containing The substances of nutrient elements are uniformly mixed under the temperature condition of 80-98°C.