A ternary herbicidal composition containing propanil, mesotrione and cyhalofop-butyl

Abstract

The present invention provides a ternary herbicidal composition containing propanil, mesotrione and cyhalofop-butyl, which comprises active ingredients in the following mass ratio: the mass ratio of propanil, mesotrione and cyhalofop-butyl is 10-50:0.1-10:1-40. The herbicidal composition of the present invention can be used to control gramineous weeds, broad-leaved weeds and sedges in paddy fields. The herbicidal composition of the present invention has a significant synergistic effect and can broaden the herbicidal spectrum, solving various weed problems with a single application and making up for the defects and limitations in the use of single agents.

Description

Technical Field

[0001] The invention relates to the field of pesticides, in particular to a ternary herbicidal composition containing propanil, mesotrione and cyhalofop-butyl and application thereof. Background Art

[0002] As a major food crop, the demand for rice is increasing, and the planting area is increasing year by year. However, the harm of weeds in rice fields to rice has seriously restricted the development of the rice industry. Weeds compete with rice for sunlight, nutrients and water, spread pests, and thus affect rice growth. In recent years, weed diseases in rice fields have become more and more serious, seriously threatening the safety of rice planting and grain harvest. The reason is that on the one hand, mechanical operations cause weed seeds to spread in multiple regions, resulting in an increase in the number of weeds, and on the other hand, the long-term use of a single herbicide has led to an increase in the number of resistant weeds. In order to effectively prevent and control weeds in rice fields, chemical control can only be achieved by increasing the dosage of drugs, which leads to the continuous enhancement of weed resistance, and even develops into cross-resistance and multi-resistance, increasing the cost of drugs, and violating the concept of green control. In order to solve the problem of increased resistance to single-dose herbicides, researchers have conducted research and development from the perspective of developing new drugs or compound herbicidal compositions.

[0003] Dipail is a highly selective contact herbicide. It is hydrolyzed by arylcarboxylamidase in rice to detoxify 3,4-dichloroaniline and propionic acid. Since barnyard grass lacks this detoxification function, its cell membrane is destroyed first, leading to water metabolism disorder and rapid dehydration and death. Barnyard grass is most sensitive in the 2-leaf stage. Dipail is ineffective after decomposition in soil and is suitable for stem and leaf treatment. It can effectively prevent barnyard grass in direct-seeded rice fields.

[0004] Mesotrione is a p-hydroxyphenylketoate dioxidase inhibitor, which can be absorbed by the roots, stems and leaves of plants. It inhibits the synthesis of p-hydroxyphenylketoate dioxidase, leading to the accumulation of tyrosine, which blocks the biosynthesis of plastoquinone and tocopherol, and further affects the biosynthesis of carotenoids, causing the stems and leaves of weeds to turn white and die. It has a good effect on the prevention and control of annual weeds and weeds such as barnyard grass in transplanted rice fields.

[0005] Cyfluthrin is a gramineous weed killer herbicide of the aryloxyphenoxypropionate class, used for stem and leaf treatment of rice fields to control weeds such as Leptochloa chinensis, Echinochloa crus-galli, and Paspalum distachyon. It is absorbed by stems and leaves and transmitted to the growing point to achieve the weed-killing effect. It is safe for rice when used at the recommended dose.

[0006] CN112741092A discloses a herbicidal composition containing mesotrione and propanil, and the mass ratio of mesotrione to propanil is 0.1 - 10:1 - 100. It can be used for controlling annual and some perennial weeds in paddy fields and has a significant synergistic effect. CN104255729A discloses a pesticide composition of propanil and cyhalofop-butyl and its application, and the mass ratio of propanil to cyhalofop-butyl is 50 - 350∶2 - 20, showing an obvious synergistic effect. In addition, there are relevant pesticide product registrations for the compounding of cyhalofop-butyl and propanil. There is no report on a ternary herbicidal composition of propanil, mesotrione and cyhalofop-butyl in the prior art. Summary of the Invention

[0007] The purpose of the present invention is to provide a herbicidal composition containing propanil, mesotrione and cyhalofop-butyl. The specific scheme is as follows:

[0008] A ternary herbicidal composition containing propanil, mesotrione and cyhalofop-butyl, comprising active ingredients with the following mass ratios: the mass ratio of propanil, mesotrione and cyhalofop-butyl is 10 - 50:0.1 - 10:1 - 40. The mass ratio of propanil, mesotrione and cyhalofop-butyl is 10 - 35:2 - 10:2 - 15. The mass ratio of propanil and propanil is 20 - 30:2 - 10:2 - 10.. The mass ratio of propanil and propanil is 25 - 30:5 - 10:5 - 10. The mass ratio of propanil and propanil is 25:5:5, 30:10:10.

[0009] The herbicidal composition of the present invention contains auxiliary ingredients that can be used in pesticides. The auxiliary ingredients include one or more of a dispersant, a wetting agent, an emulsifier, a stabilizer, a thickener, an antifoaming agent, a binder, a disintegrant, a pH regulator, a suspending agent, an antifreeze, a filler or a solvent, and corresponding dosage forms are prepared by selecting different auxiliary materials according to needs. The above auxiliary materials are all commonly used and permitted components in pesticide formulations and are not particularly limited.

[0010] The dosage form of the herbicidal composition of the present invention can be an emulsifiable concentrate, an oil suspension concentrate, a suspension concentrate, a wettable powder, a water dispersible granule, a dispersible oil suspension concentrate, an emulsion in water or a microemulsion

[0011] The percentage content of the active ingredient in the herbicidal composition preparation of the present invention is 5 - 80%, 5 - 60%, 10 - 50%.

[0012] The herbicidal composition of the present invention can be used to control weeds in paddy fields; the weeds are gramineous weeds, broadleaf weeds and sedges.

[0013] Beneficial Technical Effects

[0014] The herbicidal composition of the present invention has a significant synergistic effect, which can effectively reduce the dosage of pesticides, reduce the number of pesticide applications, lower the pesticide application cost, and reduce the adverse impact of pesticides on the ecological environment;

[0015] The herbicidal composition of the present invention can expand the herbicidal spectrum, solve various weed problems with a single application, and make up for the defects and limitations in the use of single agents; it can extend the service life of the agent, which is of great significance for the comprehensive management of weed resistance; the drug effect is exerted rapidly, the effective period is long, and the use cost is low. It can be used to control gramineous weeds, broad-leaved weeds and cyperaceae weeds in paddy fields

[0016] The herbicidal composition of the present invention is safe for the crop rice through field observation. Detailed implementation mode

[0017] Example 1 Field control effect of ternary herbicidal composition on weeds in direct-seeded rice fields

[0018] Test site:

[0019] Rice base of Hefei Academy of Agricultural Sciences, Anhui Province. The water and fertilizer conditions of all test plots are uniform, the soil fertility conditions are good, the drainage and irrigation are convenient, and the field surface is plowed and harrowed flat; the rice variety is japonica rice; the weed species are: barnyard grass, crabgrass, sprangletop, common falsepimpernel, arrowhead.

[0020] Test agents:

[0021] 35% Propanil·Mesotrione·Cyhalofop-butyl EC (25% propanil, 5% mesotrione, 5% cyhalofop-butyl, 4% emulsifier 1601#, 5% Tween 80, 2% Ethylan 324, 4% ethylene glycol, soybean oil to make up 100%); all are weight percentages, the same below.

[0022] 50% Propanil·Mesotrione·Cyhalofop-butyl EC (30% propanil, 10% mesotrione, 10% cyhalofop-butyl, 8% emulsifier 1601#, 4% Tween 80, 4% Ethylan 324, 10% ethylene glycol, soybean oil to make up 100%)

[0023] 30% Propanil·Mesotrione EC (25% propanil, 5% mesotrione, 4% emulsifier 1601#, 5% Tween 80, 2% Ethylan 324, 4% ethylene glycol, soybean oil to make up 100%)

[0024] 5% Cyhalofop-butyl EC (5% cyhalofop-butyl, 4% emulsifier 1601#, 5% Tween 80, 2% Ethylan 324, 4% ethylene glycol, soybean oil to make up 100%)

[0025] 30% Propanil·Cyhalofop-butyl EC (25% propanil, 5% cyhalofop-butyl, 4% emulsifier 1601#, 5% Tween 80, 2% Ethylan 324, 4% ethylene glycol, soybean oil to make up 100%)

[0026] 5% Mesotrione EC (Mesotrione 5%, Agricultural Ru 1601# 4%, Tween 80 5%, Ethylan 3242%, Ethylene glycol 4%, Soybean oil to make up 100%)

[0027] 40% propanil·cyhalofop-butyl EC (Anhui Shengfeng Biochemical Co., Ltd., PD20200055, propanil 30%, cyhalofop-butyl 10%)

[0028] 10% mesotrione dispersible oil suspension (Hubei Best Agrochemical Co., Ltd., PD20141836)

[0029] Test method:

[0030] The experiment set up treatment groups and blank controls. The experiment adopted random block arrangement, with a plot area of ​​35m2 and 4 replicates for each treatment. Weeds in direct-seeded rice fields were sprayed with stems and leaves at the 2-3 leaf stage, and the fresh weight control effect was investigated 30 days after the drug was applied. The investigation method was: 5 points were set in each plot, each point was 0.25m2, and the number of weeds and fresh weight of weeds were recorded by species. At the same time, the safety of the pesticide to rice was visually investigated in each plot at 10, 15, and 20 days after the drug was applied (field observation of rice safety).

[0031] The protective effect is calculated according to the following formula:

[0032] Weed fresh weight control effect (%) = (1-weed fresh weight in treatment area / weed fresh weight in control area) × 100.

[0033] Results and analysis: As shown in Table 1, for broadleaf weeds:

[0034] The active ingredient dosage of 5% cyhalofop-butyl emulsifiable concentrate is 3g / mu and has no control effect on broad-leaved weeds. The active ingredient dosage of 30% nitrocarb emulsifiable concentrate is 15g / mu and has a control effect of 58.4% on broad-leaved weeds. When the active ingredient dosage of 35% nitrocarb emulsifiable concentrate is 21g / mu, the control effect on broad-leaved weeds is 65.6%. It can be seen that the addition of cyhalofop-butyl to the combination of propanil and mesotrione can significantly improve its control effect on broad-leaved weeds.

[0035] The control effect of 5% mesotrione emulsifiable concentrate at 4g / mu on broadleaf weeds is 20.2%, and the control effect of 30% cypermethrin emulsifiable concentrate at 20g / mu on broadleaf weeds is 55.8%; according to the Gowing formula (theoretical control effect E0=E1+E2-E1*E2 / 100), it can be calculated that the theoretical control effect E0 of the combination of the two is 64.7%. When the active ingredient of 35% cypermethrin emulsifiable concentrate is 28g / mu, the control effect on broadleaf weeds is 80.2%; it can be seen that the actual control effect is far greater than the theoretical control effect, and mesotrione added to the combination of propanil and cyhalofop-butyl can achieve a synergistic effect and improve the control effect of the agents on weeds of this family.

[0036] Targeting grass weeds:

[0037] The active ingredient dosage of 5% cyhalofop-butyl EC is 3g / mu, and the control effect on grass weeds is 48.2%. The active ingredient dosage of 30% fenvalerate EC is 15g / mu, and the control effect on sphaerocephala weeds is 57.6%. According to the Gowing formula, the theoretical control effect E0 of the combination of the two is 78.0%. When the active ingredient dosage of 35% fenvalerate EC is 21g / mu, the control effect on grass weeds is 91.4%. It can be seen that the actual control effect is much greater than the theoretical control effect. The addition of cyhalofop-butyl to the combination of propanil and mesotrione can achieve a synergistic effect and improve the control effect of the agents on sphaerocephala weeds.

[0038] The active ingredient dosage of 5% mesotrione emulsifiable concentrate is 4g / mu, and the control effect on grass weeds is 50.2%. The active ingredient dosage of 30% diazinon emulsifiable concentrate is 24g / mu, and the control effect on phytoplankton weeds is 79.5%. According to the Gowing formula, the theoretical control effect E0 of the combination of the two is 89.8%. When the active ingredient dosage of 35% diazinon cyanamide emulsifiable concentrate is 28g / mu, the control effect on grass weeds is 100%. It can be seen that the actual control effect is much greater than the theoretical control effect. The addition of mesotrione to the combination of propanil and cyhalofop-butyl can achieve a synergistic effect and improve the control effect of the agents on phytoplankton weeds.

[0039] Table 1: Field test of the efficacy of 35% nitrocyanamide emulsifiable concentrate on weeds in rice fields

[0040]

[0041] As shown in Table 2, for broadleaf weeds:

[0042] The control effect of 40% propanil·cyhalofop-butyl EC at an active ingredient dosage of 20g / mu on broadleaf weeds is 17.4%, and the control effect of 10% mesotrione dispersible oil suspension at an active ingredient dosage of 5g / mu on broadleaf weeds is 73.8%; according to the Gowing formula, the theoretical control effect E0 of the combination of the two is 78.4%. When the active ingredient dosage of 50% propanil·cyhalofop-butyl EC is 25g / mu, the control effect on broadleaf weeds is 91.3%; it can be seen that the actual control effect is far greater than the theoretical control effect, and mesotrione added to the combination of propanil and cyhalofop-butyl can achieve a synergistic effect and improve the control effect of the agent on broadleaf weeds.

[0043] Targeting grass weeds:

[0044] When the application rate of the active ingredients of the 40% Propanil·Cyhalofop-butyl EC is 20 g / mu, the control effect on gramineous weeds is 81.2%. When the application rate of the active ingredients of the 10% Mesotrione OD is 5 g / mu, the control effect on gramineous weeds is 58.0%. According to the Gowing formula, the theoretical control effect E0 after the combination of the two is 92.1%. When the application rate of the active ingredients of the 50% Propanil·Mesotrione·Cyhalofop-butyl EC is 25 g / mu, the control effect on gramineous weeds is 100%. It can be seen that the actual control effect is far greater than the theoretical control effect. Adding mesotrione to the combination of propanil and cyhalofop-butyl can achieve a synergistic effect and improve the control effect of the agent on gramineous weeds.

[0045] Table 2: Field control effect test of 50% Propanil·Mesotrione·Cyhalofop-butyl EC on weeds in paddy fields

[0046]

[0047] Example 2 Formulation

[0048] EC formulation

[0049] 28% Propanil·Mesotrione·Cyhalofop-butyl EC, containing the following components in weight percentage:

[0050] Propanil 20%, Mesotrione 6%, Cyhalofop-butyl 2%, Nongru 1601# 5%, Tween 80 1%, Ethylan 324 3%, Ethylene glycol 5%, Soybean oil to make up 100%.

[0051] 20% Propanil·Mesotrione·Cyhalofop-butyl EC, containing the following components in weight percentage:

[0052] Propanil 15%, Mesotrione 2%, Cyhalofop-butyl 3%, Nongru 1601# 4%, Tween 80 2%, Ethylan 324 2%, Ethylene glycol 5%, Soybean oil to make up 100%.

[0053] 25% Propanil·Mesotrione·Cyhalofop-butyl EC, containing the following components in weight percentage:

[0054] Propanil 15%, Mesotrione 7%, Cyhalofop-butyl 3%, Nongru 1601# 2%, Tween 80 3%, Ethylan 324 5%, Ethylene glycol 3%, Soybean oil to make up 100%.

[0055] OD formulation

[0056] 30% Propanil·Mesotrione·Cyhalofop-butyl OD, containing the following components in weight percentage:

[0057] Propanil 20%, Mesotrione 5%, Cyhalofop-butyl 5%, Tersperse 2500 6%, Morwet-D450 4%, Nongru 500# 2%, Bentonite 0.2%, Glycerol 5%, Methyl oleate to make up 100%.

[0058] 27% Propanil, Mesotrione and Cyhalofop-butyl Oil Suspension, comprising the following components by weight percentage:

[0059] Propanil 18%, Mesotrione 7%, Cyhalofop-butyl 2%, Tersperse 2500 5%, Morwet-D450 3%, Agricultural Emulsifier 500# 3%, Bentonite 0.5%, Glycerol 4%, Methyl Oleate to make up 100%.

[0060] 24% Propanil, Mesotrione and Cyhalofop-butyl Oil Suspension, comprising the following components by weight percentage:

[0061] Propanil 16%, Mesotrione 3%, Cyhalofop-butyl 5%, Tersperse 2500 4%, Morwet-D450 5%, Agricultural Emulsifier 500# 2%, Bentonite 0.3%, Glycerol 4%, Methyl Oleate to make up 100%.

[0062] Field Control Effect of the Ternary Herbicide Composition in Example 3 on Weeds in Paddy Fields

[0063] Test Site:

[0064] Early rice planting area, Nanling County, Wuhu City, Anhui Province. The water and fertilizer conditions of all test plots are uniform, and the soil fertility conditions are good. The target weeds occurring in the test field mainly include barnyard grass, common dayflower, flatsedge, ammannia auriculata and false loosestrife.

[0065] Test Agents:

[0066] The agent in Example 2.

[0067] The test was set up with treatment groups and a blank control. The test was arranged in a randomized block design. The plot area was 50 m2, and each treatment had 4 replicates. The agent was applied by foliar spraying. The fresh weight control effect was investigated 30 days after application. Investigation method: 5 points were set in each plot, and each point was 0.25 m2. The number of weeds was investigated and recorded, and the fresh weight of weeds was investigated. The control effect was calculated according to the following formula:

[0068] Fresh weight control effect of weeds (%) = (1 - fresh weight of weeds in treatment area / fresh weight of weeds in control area) × 100.

[0069] As can be seen from Table 3, the preparation of the present invention has excellent control effects on weeds in paddy fields. When the dosage of the active ingredient is 25 g / mu, the control effect on weeds is above 88%.

[0070] Table 3: Field Control Effect Test of the Ternary Herbicide Composition on Weeds in Paddy Fields

[0071]

[0072]

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A ternary herbicidal composition containing propanil, mesotrione and cyhalofop-butyl, characterized in that, The active ingredients consist of propanil, mesotrione and cyhalofop-butyl, and the mass ratio of propanil, mesotrione and cyhalofop-butyl is 25-30:5-10:5-10.

2. The herbicidal composition according to claim 1, wherein It contains excipient components that can be used in pesticides, and the percentage content of the active ingredient is 5-80%; the excipient components are one or more of dispersants, wetting agents, emulsifiers, stabilizers, thickeners, defoamers, binders, disintegrants, pH regulators, suspending agents, antifreezing agents, fillers or solvents.

3. The herbicidal composition according to claim 2, wherein The dosage form of the herbicidal composition is emulsifiable concentrate, oil suspension concentrate, suspension concentrate, wettable powder, water dispersible granule, dispersible oil suspension concentrate, emulsion in water or microemulsion.

4. Use of the herbicidal composition according to any one of claims 1-3 for controlling weeds in paddy fields, characterized in that, The weeds are gramineous weeds or broad-leaved weeds.

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