CN104094975A - Farm-oriented composition containing dithiocyano-methane and application - Google Patents

Abstract

The invention belongs to the field of plant protection, and relates to a bactericidal composition containing dithiocyanomethane. The composition comprises effective amounts of A and B, A is dithiocyanomethane, and B is selected from copper rosinate and copper quinolate Equal copper-containing components, the mass ratio of A and B is 1:20-10:1, the sum of the mass of A and B accounts for 1-80% of the total mass of the preparation, and the composition is processed into wettable powder, water-dispersed Granules, water formulations, suspension concentrates, water emulsions, microemulsions, etc. The composition can prevent and control fungal and bacterial diseases of vegetables, rice, wheat, and fruit trees.

Description

Agricultural composition and application containing dithiocyanomethane

technical field

The invention belongs to the field of plant protection, in particular to an agricultural composition containing dithiocyanomethane, which can effectively prevent and treat plant diseases.

Background technique

In recent years, due to single and unscientific drug use, pests and diseases have produced different degrees of drug resistance, and caused environmental pollution and ecological environment destruction. With the improvement of people's living standards and the enhancement of health awareness, the research and development of environmentally friendly pesticides has gradually attracted the attention of pesticide research and development workers, which is an effective way to improve the environment, reduce or delay resistance and improve drug efficacy. Among them, the research and development of high-efficiency compound agents, especially those containing agricultural antibiotics and bactericidal compositions, is one of the research hotspots.

Dithiocyanomethane (MBT) is a high-efficiency algicidal and bactericidal chemical drug. MBT has a high-efficiency killing effect on the main bacteria, fungi and algae (all kinds of fungi) existing in circulating water, and the drug effect lasts for a long time. Adapt to a wide range of pH and temperature. Use 3-4ppm to kill heterotrophic bacteria, nitrosating bacteria, sulfur salt reducing bacteria, Escherichia coli, iron wire bacteria, anaerobic bacteria, denitrifying bacteria and sulfur bacteria, and the sterilization rate is as high as 99%. Can achieve high sterilization rate. Dithiocyanomethane is more effective than other bactericidal/bactericidal drugs in removing various types of fungi. Its stock solution is stable, and can be rapidly degraded or decomposed during application, which will not cause secondary pollution to the environment, high efficiency and low residue. It has a high control effect on rice bakanae disease and dry sharp nematode disease, barley stripe disease, net spot disease, and hard smut. At the same time, it also has a good control effect on other diseases caused by seed-transmitted nematodes, bacteria and fungi. Under the recommended dose, it is safe for rice and wheat seeds, and has a certain effect on improving the germination rate and seedling rate of rice seeds.

Copper-containing active ingredient pesticides have good control effects on common fungal and bacterial diseases. The inventors found that the composition of dithiocyanomethane and some copper preparations has good synergistic control effect on fungi and bacteria, and the bactericidal spectrum is broadened. At present, no dithiocyanate and copper preparations have been found, such as copper rosinate, copper quinolate, copper succinate, copper humate, copper thiobacterium, copper sulfate, copper fatty acid, copper nitrate, naphthenic acid Reports on compositions of copper, copper amino acid, copper acetate, copper sulfamate, etc.

Contents of the invention

The object of the present invention is to provide a bactericidal composition containing dithiocyanomethane, which can expand the spectrum of action, reduce or delay resistance, and improve drug efficacy, and its application.

The present invention is achieved through the following technical solutions:

The bactericidal composition containing dithiocyanomethane is characterized in that the composition comprises effective amounts of A and B, A is dithiocyanomethane, and B is selected from copper rosinate, copper quinolate, copper succinate, One of copper humate, copper thiobacterium, copper sulfate, copper fatty acid, copper nitrate, copper naphthenate, copper amino acid, copper acetate, copper sulfamic acid, the mass-number ratio of A and B is 1: 20-10:1. Preferably, the ratio of parts by mass of A to B is 1:10-5:1.

The above-mentioned composition of the present invention is processed into wettable powder, water dispersible granule, aqueous solution, suspension concentrate, aqueous emulsion, microemulsion, etc., and the sum of the mass of A and B accounts for 1-80% of the total mass of the preparation.

The composition of the present invention can control fungi and bacterial diseases of various plants such as vegetables, rice, wheat, fruit trees, etc., and the preferred diseases are tomato bacterial wilt, rice bacterial streak and bakanae disease, watermelon horn spot, citrus Orange canker.

Composition of the present invention compares with prior art, produces following beneficial effect:

1. Widening application: the composition can prevent and control various diseases of crops.

2. Reduce the cost of use: because the composition has improved control effect and increased control spectrum, the frequency of pesticide use is reduced, and the cost of use is reduced.

3. Delaying drug resistance: the composition containing dithiocyanomethane and copper preparation is a compound of components with different action mechanisms, and the disease is not easy to produce drug resistance.

4. Environmentally friendly: low toxicity to humans, animals and non-target organisms, fast degradation in the environment, low residue, and no environmental pollution.

Detailed ways

The following examples are only used to explain the present invention, and all modifications, replacements or improvements that do not deviate from the spirit and principles of the present invention belong to the scope of protection of the present invention.

Example 1 12% dithiocyanomethane · rosinic acid copper wettable powder

Mix 2 g of dithiocyanomethane, 10 g of copper rosinate, 2 g of sodium lignosulfonate, and 100 g of white carbon black, dry, cool, and grind each component to obtain 12% dithiocyanomethane·pine resin Acid copper wettable powder.

Embodiment 2 16% dithiocyanomethane quinoline copper water dispersible granules

Mix 2 g of dithiocyanomethane, 14 g of copper quinoline, 4 g of naphthalene sulfonate formaldehyde condensate, 1.5 g of sodium alkylbenzene sulfonate, 0.5 g of gum arabic, and 100 g of white carbon black, and then ultrafinely pulverize the mixture Granulating, drying, and sieving to form 16% dithiocyanomethane·quinoline copper water-dispersible granules.

Example 3 10% dithiocyanomethane · copper succinate wettable powder

Mix 1 g of dithiocyanomethane, 9 g of copper succinate, 2 g of sodium lignin sulfonate, and 100 g of white carbon black, dry, cool, and grind each component to obtain 10% dithiocyanomethane · Copper succinate wettable powder.

Example 4 8% Dithiocyanomethane·Thiabactin Copper Water Dispersible Granules

Mix 1g of dithiocyanomethane, 7g of thiocyanate copper, 4g of naphthalenesulfonate formaldehyde condensate, 1.5g of sodium alkylbenzenesulfonate, 0.5g of gum arabic, and make up 100g of white carbon black, and then ultrafinely pulverize the mixture Granulating, drying, and sieving to form 8% dithiocyanomethane·thibacterium copper water-dispersible granules.

Example 5 12% Dithiocyanomethane Humic Acid Copper Solution

Fully dissolve 2 g of dithiocyanomethane and 10 g of copper humate in water, add 2 g of phenethylphenol polyoxyethylene ether and 2 g of Nongru 500#, stir, make up to 100 g with water, and obtain 12% dithiocyanomethane. Copper humic acid solution.

Embodiment 6 10% dithiocyanomethane · copper sulfate suspending agent

Mix 1g of dithiocyanomethane, 9g of copper sulfate, 3g of sodium lignosulfonate, 5g of tea dry powder, 5g of bentonite, 2g of magnesium aluminum silicate, and 10g of ethylene glycol, add 25g of water and grind thoroughly, and make up to 100g of water. Prepared as 10% dithiocyanomethane·copper sulfate suspension concentrate.

Example 5 Effect of a fungicidal composition containing dithiocyanomethane on tomato bacterial wilt

According to the protocol, compound preparations and single-dose preparations were prepared, and activity pre-tests were carried out. According to the pre-test of activity determination, the preparation is formulated into the required concentration. Before the test, a corresponding single agent and a blank control were set up in the tomato field. At the initial stage of the disease, the hand-held sprayer was used for conventional constant spraying, and 50 plants were sprayed with each agent. Apply again 7-10 days after the first application. 10-20 days after the second spraying, the diseases of listed tomato plants were investigated. Convert percentages to efficacy using Abbot's formula.

In the theoretical effect, x is the effect of substance A when the concentration is a, and y is the effect of substance B when the concentration is b. The theoretical effect and the actual effect are compared to evaluate the synergistic effect of the composition. See Table 1 for the results of the composition on tomato plant diseases.

Table 1 The field effect of the fungicidal composition containing dithiocyanomethane on tomato bacterial wilt

As can be seen from Table 1, the actual effect of the composition of dithiocyanomethane with copper rosinate, copper quinoline, copper succinate, copper humate, thiobacterium copper, and copper sulfate on tomato bacterial wilt is higher than The theoretical effect of the corresponding composition shows that the composition has obvious synergistic effect.

Example 6 The effect of the fungicidal composition containing dithiocyanomethane on rice diseases

According to the protocol, compound preparations and single-dose preparations were prepared, and activity pre-tests were carried out. According to the pre-test of activity determination, the preparation is formulated into the required concentration. Before the test, at the initial stage of rice seedling disease, different treatment plots were set up, and a hand-held sprayer was used to spray once at a regular constant rate. After the rice was transplanted, different treatment plots were sprayed with corresponding chemicals for the second time, and 10-20 days after the second spraying, the diseases of listed rice plants were investigated. Convert percentages to efficacy using Abbot's formula.

In the theoretical effect, x is the effect of substance A when the concentration is a, y is the effect of substance B when the concentration is b, compare the theoretical effect and the actual effect, and evaluate the synergistic effect of the composition. When the actual effect is greater than the theoretical effect, it is Synergy. See Table 2 for the results of the composition on rice bacterial streak and bakanae disease.

Table 2 Field effects of fungicidal compositions containing dithiocyanomethane on rice diseases

Seen from Table 2, the compositions of dithiocyanomethane and copper rosinate, copper quinoline, copper succinate, copper humate, thibacterium copper, and copper sulfate respectively at 1:2, have no effect on rice bacterial resistance. The actual effects of streak disease and bakanae disease are higher than the theoretical effects of the composition, indicating that the composition has a synergistic effect.

Claims (5)

1. contain the bactericidal composition of methylene dithiocyanate, it is characterized in that the composition comprises effective amount of A and B, A is methane dithiocyanate, and B is selected from copper rosinate, copper quinoline, succinic acid One of copper, copper humate, copper thiazolate, copper sulfate, copper fatty acid, copper nitrate, copper naphthenate, copper amino acid, copper acetate, copper sulfamate, the mass ratio of A to B is 1:20-10:1. 2. The composition according to claim 1, characterized in that the ratio of parts by mass of A to B is 1:10-5:1. 3. The composition according to any one of claims 1-2, characterized in that the composition is processed into wettable powder, water dispersible granule, aqueous agent, suspending agent, water emulsion, microemulsion, between A and B quality And the percentage that accounts for the total mass of preparation is 1-80%. 4. The use of the composition according to claim 3, characterized in that the composition can control fungal and bacterial diseases of vegetables, rice, wheat, fruit trees. 5. The purposes of claim 4, characterized in that the diseases are tomato bacterial wilt, rice bacterial streak and bakanae disease, watermelon angular spot, citrus canker.