CN112205418A

CN112205418A - Compound herbicide containing thifensulfuron methyl

Info

Publication number: CN112205418A
Application number: CN202011354521.9A
Authority: CN
Inventors: 李明
Original assignee: Zhenjiang Pioneer Cropscience Co ltd
Current assignee: Zhenjiang Pioneer Cropscience Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-01-12

Abstract

The invention discloses a compound herbicide containing thifensulfuron methyl, which comprises an active ingredient thifensulfuron methyl and an active ingredient B, wherein the active ingredient B is one of metsulfuron methyl, florasulam and rimsulfuron; also comprises a pesticide adjuvant. When the active ingredient B is metsulfuron-methyl, the mass fraction of the thifensulfuron-methyl is 68 percent, and the mass fraction of the metsulfuron-methyl is 7 percent; when the active ingredient B is florasulam, the mass fraction of the thifensulfuron is 50 percent, and the mass fraction of the florasulam is 17 percent; when the active ingredient B is rimsulfuron, the mass fraction of the thifensulfuron methyl is 25 percent, and the mass fraction of the rimsulfuron is 50 percent. The compound herbicide containing thifensulfuron methyl provided by the invention has the advantages of high herbicidal activity, wide herbicidal spectrum, long persistent period and high safety, and can delay weed resistance.

Description

Compound herbicide containing thifensulfuron methyl

Technical Field

The invention relates to a compound herbicide containing thifensulfuron methyl, belonging to the technical field of pesticide herbicides.

Background

In recent years, the development direction of pesticides reflects high efficiency, low degree, low residue and no pollution, and is specifically expressed by pursuing 'three highs', namely: (1) the safety is high, the toxicity and residue are required to be low, and the pollution is avoided; (2) the biological activity is high; (3) the selectivity is high. Therefore, the development of novel pesticides with low toxicity, high efficiency and high selectivity is an inevitable trend at present.

At present, the wheat field herbicide is limited by the safety of crops, the weed control spectrum is limited, the occurrence of weeds in the wheat field cannot be completely and effectively controlled by using one herbicide alone, and residual toxicity to crops in the current season or aftercrops is easily caused by the fact that some herbicides are large in water solubility, too long in field lasting period, too large in dosage or uneven in application.

Disclosure of Invention

The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a compound herbicide containing thifensulfuron methyl.

The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a compound herbicide containing thifensulfuron methyl comprises an active ingredient thifensulfuron methyl and an active ingredient B, wherein the active ingredient B is one of metsulfuron methyl, florasulam and rimsulfuron;

also comprises a pesticide adjuvant.

Thifensulfuron methyl is a selective systemic and conductive sulfonylurea herbicide, and has the advantages of high activity, broad spectrum, low dosage, low toxicity, high selectivity and the like. After the thifensulfuron methyl herbicide is applied, the thifensulfuron methyl herbicide is absorbed by leaves and roots of plants and is rapidly conducted in the plants to inhibit the biosynthesis of valine and isoleucine, so that the plants are killed within 1-3 weeks after the plants receive the herbicide by preventing cell division, and the thifensulfuron methyl herbicide has strong drug resistance on cereal crops. The thifensulfuron methyl can be rapidly decomposed in soil and is harmless to next crop after 30 days; the thifensulfuron methyl can be used for preventing and killing broadleaf weeds in crops such as wheat, barley, corn and the like.

Metsulfuron-methyl is a systemic conduction selective wheat field high-efficiency sulfonylurea herbicide. The plant is absorbed by roots, stems and leaves of the plants, is quickly conducted in the plants after being absorbed by roots and leaves of weeds, can be conducted to the tops and the bases, quickly inhibits the growth of the roots and the tops of new shoots of the plants within hours, and withers in 3-14 days; after being absorbed by wheat seedling, the wheat seedling is converted by enzyme in wheat plant and degraded quickly, so that the wheat has great tolerance to the product. The metsulfuron-methyl disappears through hydrolysis and microbial degradation in soil, the half life period is 4 weeks, and the metsulfuron-methyl is decomposed slightly quickly due to quick hydrolysis in acid soil; the effective dose is 2-8 g per hectare, and the residue can not be detected after 7-44 weeks after the application, so the safety to the succeeding crops is high.

Florasulam is a triazolopyrimidine sulfonamide herbicide. The 20 th century 80 th U.S. Dow agricultural science company reported pyrimidine amide herbicides for the first time, and then successfully developed a plurality of new varieties of efficient herbicides using triazolopyrimidine sulfonamide as a parent compound. The florasulam is a fifth new triazole pyrimidine sulfonamide herbicide variety which is successfully developed in the middle of 90 years in the 20 th century after the metosulam, the flumetsulam, the cloransulam-methyl and the diclosulam. The florasulam is a systemic conduction type herbicide and can be conducted to the whole weed, so that the weed can be thoroughly killed without relapse. The effect is stable at low temperature, and the stable effect can be ensured even at 2 ℃, which is incomparable with other herbicides. Is used for preventing and killing broadleaf weeds in wheat fields. The florasulam has a wide herbicidal spectrum, can prevent and kill most broad-leaved weeds in wheat fields, including cleavers (Rubiaceae), mai-jia (Boraginaceae) and other difficult-to-prevent weeds, and has a very good inhibiting effect on euphorbia helioscopia (Euphorbiaceae) which is the most difficult-to-prevent weeds in the wheat fields.

Rimsulfuron (rimsulfuron), also known as rimsulfuron, is a proprietary name of sulfonylurea herbicides and has the chemical name: 1- (4, 6 dimethoxypyrimidin-2-yl) -3- (3-ethylsulfonyl-2-pyridinesulfonyl) urea. The rimsulfuron has the advantages of high selectivity, high efficiency, low toxicity and the like, and is an important wheat field herbicide. The application adopts post-emergence treatment, and the herbicide can be quickly conducted in plants through the absorption of the stems, leaves and roots of the weeds, inhibit the synthesis of valine and isoleucine of the weeds, prevent cell division and kill the weeds. The sensitive weeds turn yellow 3 days after drug absorption and die after withering within 1-3 weeks. Can effectively prevent and kill most of broadleaf and gramineous weeds, such as field thistle, crabgrass, canary grass, barnyard grass, ryegrass, amaranthus retroflexus, cleavers, trichosanthes kirilowii maxim and corn poppy, has wide application range, and can be used for crops such as wheat, corn, potato and the like. The rimsulfuron is one of prominent sulfonylurea herbicide varieties developed in recent years, and has good market prospect. However, since the price of rimsulfuron is high and the unit use cost is high, the marketing and the use are greatly limited.

Further, the active ingredient B is metsulfuron methyl, the mass fraction of the thifensulfuron methyl is 68%, and the mass fraction of the metsulfuron methyl is 7%.

Further, the active ingredient B is florasulam, the mass fraction of the thifensulfuron is 50%, and the mass fraction of the florasulam is 17%.

Further, the active ingredient B is rimsulfuron, the mass fraction of the thifensulfuron methyl is 25%, and the mass fraction of the rimsulfuron is 50%.

Further, the compound herbicide is prepared into water dispersible granules.

Further, the pesticide adjuvant includes, but is not limited to, water, filler, surfactant, binder, disintegrant, acid-base regulator.

The surfactant is an emulsifier, a dispersant or a wetting agent. The wetting agent is one or a combination of sodium dodecyl sulfate, sodium sulfosuccinate, alkyl succinic acid sulfonate, fatty alcohol-polyoxyethylene ether, sodium alkyl benzene sulfonate and alkyl naphthalene sulfonate. The dispersing agent is one or a combination of more of alkylphenol polyoxyethylene ether formaldehyde condensate, lignosulfonate, polycarboxylate, alkyl naphthalene sulfonate polycondensate and p-methoxy fatty amido benzene sulfonic acid.

The binder is one or a combination of more of urea, glucose, polyethylene glycol, soluble starch and sodium carboxymethyl cellulose.

The pH regulator is one or more of ethylenediamine tetraacetic acid, disodium ethylenediamine tetraacetic acid, sodium tripolyphosphate and citric acid.

The filler is one or a combination of more of sodium sulfate, ammonium sulfate, corn starch, kaolin, light calcium carbonate, talcum powder, wollastonite powder, sodium acetate, potassium chloride, sodium chloride and diatomite.

Has the advantages that: the compound herbicide containing thifensulfuron methyl provided by the invention has the following advantages:

(1) the weeding activity is high; the invention selects the herbicides with different weed control spectra and complementary advantages and disadvantages, compounds the herbicides according to a specific mass ratio, kills weeds by two different mechanisms, and the two herbicides generate synergistic action in the proportioning range, thereby greatly improving the weed control activity of the herbicides.

(2) The weeding spectrum is wide, and the persistent period is long; the two are mixed to kill weeds by two different mechanisms, so that the weeding spectrum is expanded, and various gramineous weeds and broadleaf weeds can be prevented and controlled.

(3) The weed resistance is delayed; the herbicide disclosed by the invention reduces the resistance of weeds to the herbicide by compounding the two active ingredients, delays the generation speed of the resistance of the weeds, and improves the control effect of the resistant weeds, so that the service life of the herbicide is prolonged.

(4) The safety is high; the use dosage of the compounded herbicide is controlled, and the safety of the herbicide to wheat and succeeding crops can be improved on the premise of improving the pesticide effect.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1: preparing water dispersible granules containing 68% of thifensulfuron methyl and 7% of metsulfuron methyl by mass

(1) Ingredients

Weighing the samples according to the following ingredient table (mass fraction), and then uniformly mixing for later use;

68 percent of thifensulfuron methyl technical (92.5 percent),

7 percent of metsulfuron-methyl technical (92.5 percent),

2 percent of sodium dodecyl benzene sulfonate (wetting agent),

6% of alkyl naphthalene sulfonate polycondensate (dispersant 1),

6 percent of polycarboxylate (dispersant 2),

2 percent of sodium carbonate (acid-base regulator),

9% of corn starch (filler).

(2) Jet milling

Crushing the material mixed in the step (1) in a jet mill to ensure that the particle fineness meets 99.8 percent of a wet sieve (325 meshes), and controlling the air inlet pressure, the feeding speed and the like in the jet milling process to avoid large fluctuation; and (5) after the jet milling is finished, the material is reserved.

(3) Granulating

Adding the powder after the air flow crushing into a kneading machine, uniformly stirring, adding the dicamba sodium salt wet material in proportion, continuously uniformly stirring, calculating the water addition amount according to the experimental data of a laboratory test, kneading for about 5min, starting granulation, continuously and uniformly adding the wet material into a rotary extrusion granulator, controlling the feeding speed and the material level in the granulator, and keeping for later use after the extrusion is finished.

(4) Drying by baking

And (3) starting the boiling dryer for preheating, adding the materials to begin to dry the materials when the temperature is higher than 50 ℃, setting the drying temperature to dry the materials at 65 ℃, and screening after drying is finished to obtain the water dispersible granules.

Example 2: preparation of water dispersible granule containing 50 mass percent of thifensulfuron methyl and 17 mass percent of florasulam

50 percent of thifensulfuron methyl technical (92.5 percent),

17 percent of florasulam technical material (96.0 percent),

3 percent of sodium sulfosuccinate (wetting agent),

3% of alkyl naphthalene sulfonate polycondensate (dispersant 1),

3 percent of polycarboxylate (dispersant 2),

3 percent of sodium tripolyphosphate (acid-base regulator),

2.5 percent of diatomite (disintegrating agent),

18.5% of corn starch (filler).

The other steps are the same as the example 1, and the water dispersible granule is prepared.

Example 3: preparing water dispersible granules containing 25 mass percent of thifensulfuron methyl and 50 mass percent of rimsulfuron

thifensulfuron methyl (92.5%) 25%,

50 percent of rimsulfuron technical material (95.0 percent),

2 percent of fatty alcohol-polyoxyethylene ether (wetting agent),

4 percent of alkylphenol polyoxyethylene ether formaldehyde condensate (dispersant 1),

3 percent of polycarboxylate (dispersant 2),

0.5 percent of citric acid (acid-base regulator),

3 percent of glucose (binder),

3 percent of diatomite (disintegrant),

9.5 percent of light calcium (filler).

Test of drug efficacy

Weed control tests and seedling damage condition investigation are carried out in winter wheat fields by using the herbicide compositions prepared in the examples 1-3, and comparison tests are carried out by using four single-dose herbicides of 75% thifensulfuron methyl water dispersible granules, 10% metsulfuron methyl water dispersible granules, 25% florasulam water dispersible granules and 50% rimsulfuron water dispersible granules.

Spraying, and investigating weeding effect 20 days after application, wherein the pesticide effect is graded by 0-9, 0 indicates complete ineffectiveness, and 9 indicates complete weed control; while the weeding effect is tested, the damage condition of the pesticide to the seedlings is investigated, and the damage condition is graded by 0-9, wherein 0 means that the growth of the seedlings is not affected at all, and 9 means that the growth of the seedlings is completely inhibited. The results of the test investigation are shown in table 1:

TABLE 1 herbicidal Effect of examples 1 to 3 and comparative agents 1 to 4 and damage status to crops

In table 1, the amount of thifensulfuron methyl used was 37.5g.a.i/ha, the gramineous weed control effect was 5, and the broadleaf weed control effect was 7 for control 1; the control agent 2 has the using amount of metsulfuron methyl up to 75g.a.i/ha, the weed control effect only reaches the grade of 6, the control agent 3 has the using amount of florasulam up to 15g.a.i/ha, the weed control effect only reaches the grade of 6-7, the control agent 4 has the using amount of rimsulfuron up to 75g.a.i/ha, the weed control effect only reaches the grade of 5-7, and the control agents 1, 2, 3 and 4 have certain damage to crops; for the four single-agent pesticides, the dosage is increased inevitably to achieve better weed control effect, the harm to crops is increased by increasing the dosage, the environmental burden is increased, and the current concept of green environmental protection is not met. In examples 1 to 3, the amount of thifensulfuron methyl, metsulfuron methyl, florasulam, rimsulfuron used was reduced compared with the control, but the weed control effect was improved, even a complete control effect could be achieved, and the growth of the seedlings of the crops was not affected. Therefore, the herbicide composition containing thifensulfuron methyl provided by the invention expands the herbicide controlling spectrum, has a synergistic effect compared with the using effect of each single agent, achieves the purpose of preventing and controlling weeds in the whole field by one-time application, reduces the damage to crops, and can be used for preventing and controlling various weeds in wheat fields in China.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A compound herbicide containing thifensulfuron methyl comprises an active ingredient of thifensulfuron methyl, and is characterized in that: the herbicide also comprises an active ingredient B, wherein the active ingredient B is one of metsulfuron methyl, florasulam and rimsulfuron;

also comprises a pesticide adjuvant.

2. The thifensulfuron methyl-containing compound herbicide as claimed in claim 1, which is characterized in that: the active ingredient B is metsulfuron methyl, the mass fraction of the thifensulfuron methyl is 68%, and the mass fraction of the metsulfuron methyl is 7%.

3. The thifensulfuron methyl-containing compound herbicide as claimed in claim 1, which is characterized in that: the active ingredient B is florasulam, the mass fraction of the thifensulfuron is 50%, and the mass fraction of the florasulam is 17%.

4. The thifensulfuron methyl-containing compound herbicide as claimed in claim 1, which is characterized in that: the active ingredient B is rimsulfuron, the mass fraction of the thifensulfuron methyl is 25%, and the mass fraction of the rimsulfuron is 50%.

5. The thifensulfuron methyl-containing compound herbicide as claimed in claim 1, which is characterized in that: the compound herbicide is prepared into water dispersible granules.

6. The thifensulfuron methyl-containing compound herbicide as claimed in claim 1, which is characterized in that: the pesticide adjuvant includes but is not limited to water, filler, surfactant, binder, disintegrant, acid-base regulator.