CN113057167A

CN113057167A - Herbicide composition containing quinclorac and sulfentrazone and applied to paddy field

Info

Publication number: CN113057167A
Application number: CN202010002729.8A
Authority: CN
Inventors: 李美; 高兴祥; 李健; 房锋
Original assignee: Institute of Plant Protection Shandong Academy of Agricultural Sciences
Current assignee: Institute of Plant Protection Shandong Academy of Agricultural Sciences
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2021-07-02

Abstract

The invention belongs to the technical field of pesticide herbicides, and provides a composition containing quinclorac, sulfentrazone quinclorac and sulfentrazone, wherein the weight ratio of the quinclorac to the sulfentrazone is 1:0.125-1: 8. The herbicide composition provided by the invention is used for preventing and killing gramineous weeds such as cockspur grass, crabgrass, rice grass and abutilon in a rice paddy field, and has good synergistic action or addition action. The invention expands the weed control spectrum, enhances the control effect, effectively complements the quick action and the persistence, avoids the rapid occurrence of weed resistance caused by using a single herbicide to prevent and kill off, delays the occurrence of weed drug resistance, reduces the dosage, reduces the use cost and lightens the environmental pollution.

Description

Herbicide composition containing quinclorac and sulfentrazone and applied to paddy field

Technical Field

The invention belongs to the technical field of pesticide herbicides, and particularly relates to a herbicide composition containing quinclorac and sulfentrazone.

Background

The rice is the first large grain crop in China, the annual planting area is about 4.5 hundred million acres, and the rice is the most main consumer variety in grain. According to the characteristics change of the consumption of the grain and the quantity of safe cultivated land of Chinese residents, the rice consumption of the Chinese residents is 68.2 kg in 2011 and accounts for 54.7 percent of the total consumption of the grain. The main weeds in the paddy field are cockspur grass, moleplant seed, cudweed herb, piemarker, large crabgrass, black nightshade, purslane, chenopodium album, paspalum distichum, leersia hexandra and the like; and the like. The grass damage seriously threatens the normal growth of the rice and is an important obstacle for restricting the high, stable and high yield of the rice. Weeds compete with rice for water, nutrients, illumination and space, so that the growth environment of the rice is deteriorated, and the normal growth of the rice in the seedling stage is influenced. In general years, the yield of the rice can be reduced by 1-2 due to the harm of weeds, and the yield can be reduced by 3-5 in severe cases. The weed control in paddy fields is an important link in the production of paddy rice.

The herbicide is a common measure for preventing and controlling weeds in the paddy field at present, and has important effects on promoting the increase of the yield of paddy rice and saving the planting cost. However, the herbicide is popularized and applied in a large area for a long time, so that the problems of weed resistance, population succession and phytotoxicity existing in the chemical prevention and control of farmland weeds are gradually serious, and the high yield and harvest of rice and the safety of afterreap crops are seriously influenced. The long-term use of a single herbicide for preventing and killing can cause the number of sensitive weeds to be reduced, the number of insensitive or malignant weeds to be increased, the weed community is changed, and the harvest of the rice crop yield is seriously influenced.

Sulfentrazone, the English name Sulfentrazone, the alias N- (2, 4-dichoro-5- (4- (difluoromethyl) -4, 5-dihydo-3-methyl-5-oxo-1H-1, 2,4-triazol-1-yl) phenyl) methanesulfonamide, the product name N- (2,4-Dichloro-5- (4-difluoromethyl-4, 5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl) phenyl) methanesulfonamide, the molecular formula C₁₁H₁₀C_l2F₂N₄O₃S, molecular weight 387.19, CAS registry No. 122836-35-5. Belongs to a low-toxicity weed removing agent. Raw medicine rat acute oral LD50>2855 mg/kg, and LC504.14 mg/l by acute inhalation, the medicine has slight irritation to rabbit skin, irritation to rabbit eye, and low toxicity to fish. Belongs to protoporphyrinogen oxidase inhibitors. By inhibiting protoporphyrinogen oxidase, excessive protoporphyrin IX, which is a photosensitizer and causes active oxygen to be generated in the plant cell, finally causes the cell membrane, the tonoplast membrane and the like to be broken, the intracellular solute to be exuded and dried up and dead. Semi-decay of soilIn the period of 110-280 days, the stem and leaf treatment and the soil treatment can be performed. Is suitable for preventing and treating 1-year-old broadleaf weeds, grass weeds, sedges and the like in fields such as rice, sorghum, soybean, peanut and the like, such as morning glory, amaranthus retroflexus, quinoa, stramonium, crab grass, green bristlegrass, siberian grass, and the like.

Quinclorac with CAS number 84087-01-4; the English name is quinclorac, the English synonym is quinclorac, BAS 514, 3, 7-DICHLORO-8-quinololine-8-CARBOXYLIC ACID, 3,7-DICHLOROQUINOLINE-8-CARBOXYLIC ACID, 3, 7-dichloroquinline ACID-8, FACET, 3,4-DICHLORO-8-quinoline CARBOXYLIC ACID, dichlorolinic ACID W.P. chemical book; the synonyms in Chinese are cockspur grass, quinclorac, crystal plane, small crystal plane [ crystal ], chloroquine, Shenhoe, 3,7-dichloroquinoline-8-carboxylic acid, cockspur-killing king and 3, 4-dichloro-8-quinolinecarboxylic acid. The chemical name is 3,7-dichloro-8-quinolinecarboxylic acid, the molecular formula is C10H5Cl2NO2, the molecular weight is 242.06, quinclorac belongs to a low-toxicity herbicide, the medicament can be absorbed by germinated seeds, roots and leaves, has the characteristics of hormone herbicides, and has similar action symptoms with auxin substances. The quinclorac can be decomposed by the roots of the rice, so that the rice is safe. The quinclorac is mainly used for preventing and treating barnyard grass in rice fields, has long working life, is effective in 1-7 leaf periods, and can also be used for preventing and treating sedum lineare, sesbania, cress, monochoria vaginalis, Chinese honeylocust fruit and the like. The quinclorac is mainly used for preventing and killing barnyard grass by inhibiting the growing points of the barnyard grass and preventing the heart leaves from being extracted. The herbicide has been used in rice planting areas for years, and the use amount of the herbicide tends to increase year by year. The proper-time medication of the quinclorac is generally controlled to use the quinclorac after the 2-leaf and 1-heart period of the rice, and the dosage of 36 percent benzyl-dichloro wettable powder is preferably 80-90 g per 667m of 2 and is controlled within 100 g. The quinclorac is used before the 2-leaf stage of the rice, is easy to generate phytotoxicity, and is characterized in that leaves of the rice at the tillering stage are scattered, tillering is avoided, and scallion tubular leaves are generated. Before the 3-leaf stage of rice, the dosage of the quinclorac per mu of the pure drug cannot exceed 25 g (which is equivalent to 50 g of 50% quinclorac wettable powder). Over-use of quinclorac or uneven spraying and repeated application of the pesticide easily cause phytotoxicity, damage to dark green rice leaves, slow tillering and tubular green onion leaves in the later period. In the seedlings with light phytotoxicity, the stem base is expanded, becomes hard and brittle, and the heart leaves become narrow and twisted into malformation. The symptoms of phytotoxicity generally appear 10-15 days after the application of the medicine. In recent years, the quinclorac is widely used in production, and has poor effect on preventing and controlling the aged barnyard grass with the leaf period of more than 4. Particularly, in a dry direct seeding paddy field, the quinclorac dosage is increased to effectively prevent and kill off the barnyard grass in the field in the 2-leaf stage and the 1-heart stage to the 3-leaf stage of the paddy rice and the old field in the 4-leaf stage, and the mu dosage of 50 percent quinclorac wettable powder before and after the 3-leaf stage of the paddy rice in the direct seeding paddy rice production is about 50 grams. After the dosage is increased, the risk of phytotoxicity of the quinclorac is increased, and a large area of rice has phytotoxicity every year. Therefore, the quinclorac is combined with other herbicides to reduce the dosage and the risk of phytotoxicity.

The development of new herbicides is expensive and has long period, and compared with the development and research of efficient, low-toxicity and low-residue compounding and mixing, the method has the advantages of low investment and short development period. The reasonable compounding or mixing of the chemical herbicide has the advantages of expanding a weed control spectrum, improving the control effect, prolonging the pesticide application period, reducing the dosage, reducing the risk of phytotoxicity, reducing residues, delaying the occurrence and development of drug resistance and drug resistance of weeds and the like, so that the selection of the proper compounding or mixing of the herbicide is one of the most effective and economical methods for solving the problems; however, because the action mechanism between pesticide blending is complex, whether the synergy is influenced by various factors after combination is verified only by depending on experimental results, and the expectation cannot be carried out.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a herbicide composition containing quinclorac and sulfentrazone.

The invention is realized by the following technical scheme:

the invention provides a herbicide composition containing quinclorac and sulfentrazone, wherein the weight ratio of the quinclorac to the sulfentrazone is 1:0.125-1: 8.

Preferably, the weight ratio of the quinclorac to the sulfentrazone is 1:0.5-1: 2.

Preferably, the weight ratio of the quinclorac to the sulfentrazone is 1:0.5, 1:1, 1:1.5 or 1: 2.

The herbicide composition preparation can be prepared into pesticide acceptable formulations such as missible oil, water suspending agent, oil suspending agent, wettable powder, granules or water dispersible granules.

The herbicide composition is used for preventing and killing cockspur grass, crab grass, rice grass and abutilon in paddy fields.

The invention has the beneficial effects that:

1. the herbicide has broad herbicide controlling spectrum and effective complementation between quick acting property and lasting effect. After the quinclorac and the sulfentrazone are compounded, the weed control spectrum has complementary advantages, the herbicide has good effect on broadleaf weeds and gramineous weeds in paddy fields, and has good quick-acting property and persistence.

2. The control effect is enhanced. After the quinclorac and the sulfentrazone are compounded, the interaction type is addition action, the synergistic action is realized, the control effect is enhanced, and the effect is better than that of single use.

3. The method avoids the rapid occurrence of weed resistance caused by using a single herbicide for preventing and killing, and delays the occurrence of weed resistance.

4. The dosage is reduced, the use cost is reduced, and the environmental pollution is reduced.

Detailed Description

The present invention is further illustrated by the following detailed description, but is not to be construed as being limited to the examples.

The method for preparing the water suspending agent by the quinclorac and the sulfentrazone comprises the following steps: 90% quinclorac technical product and 91% sulfentrazone technical product. Weighing quantitative quinclorac and sulfentrazone raw medicines respectively by an electronic balance, adding a special emulsifier for dissolving, then adding 2 times of N, N-dimethylformamide for completely dissolving, and diluting with 0.1% Tween-80 aqueous solution to obtain 1% mother liquor for later use.

Example 1 indoor formulation screening

First, test conditions

The weeds to be tested are cockspur grass, large crabgrass, rice grass and abutilon. And (3) culturing the test material in a glass greenhouse at the temperature of 25-35 ℃ under natural illumination. Sowing quantitative cockspur grass, crab grass, rice grass and piemarker seeds in a plastic basin with the diameter of 9 cm, covering soil for 1-2 mm, putting the plastic basin into an enamel tray filled with water, allowing the water to gradually permeate into the enamel tray, and transferring the enamel tray into an artificial climate chamber for standby application after the water permeates into the soil surface.

And (3) regularly supplementing water in a bottom infiltrating irrigation mode to keep the soil humidity except that the water cannot be watered 1-2 days after the pesticide is sprayed.

Second, design of experiment

The test agents were 90% quinclorac and 91% sulfentrazone. Weighing quantitative quinclorac and sulfentrazone raw medicines respectively by an electronic balance, adding a special emulsifier for dissolving, then adding 2 times of N, N-dimethylformamide for completely dissolving, and diluting with 0.1% Tween-80 aqueous solution to obtain 1% mother liquor for later use.

The quinclorac is 37.5, 75, 150 and 300 ga.i./ha, and the sulfentrazone is 37.5, 75, 150 and 300 ga.i./ha. The different dosages of each medicament are mixed two by two to obtain different mixed dosages.

The test is carried out on the stems and leaves of barnyard grass, barnyard grass 2 leaves 1 heart stage, piemarker 2 needles leaf stage and rice bag grass 2-4 leaf stage by even spraying treatment. An ASS-4 type automatic control spraying system and a fan-shaped spray head are adopted, the pressure, the flow and the like of the spray head are combined, 50 mL of liquid medicine (30L of water consumption for each mu) is sprayed according to the actual spraying area (1.1 m 2), the operation speed is adjusted, the plastic pots to be treated are uniformly arranged on a spraying table, and the spraying treatment is uniform. The spraying pressure is 0.4 MPa, and the flow of the fan-shaped spray head is 800 mL/min. Spraying from low amount to high amount. Each treatment was repeated 4 times.

Thirdly, calculating test results

The combination effect pattern after mixing was evaluated by the Gowing method.

The theoretical prevention effect calculation formula of the Gowing method is as follows:

wherein X, Y is the actual measurement preventing value (%) of two single agents, E is the actual measurement preventing value (%) of different mixture ratios, and E is the actual measurement preventing value (%) of two single agents₀Is the theoretical proof value (%). When E-E₀Addition between-5 and 5, E-E₀>5 th time is synergistic effect、E- E₀<Antagonism is observed at-5.

TABLE 1 Quinclorac and sulfentrazone mixed combined action indoor determination-Gowing method

The test result shows that the quinclorac mainly prevents and removes gramineous weeds, namely cockspur grass, in the paddy field, has poor effect on another gramineous weed, namely crabgrass, and has no effect on broadleaf weeds, namely rice grass and piemarker; the other one has excellent effect on broadleaf weeds such as round-bottom sedge and piemarker, has better effect on gramineous weeds such as green bristlegrass and has poor effect on the other gramineous weeds such as crabgrass.

After the quinclorac and the sulfentrazone are compounded, the quick-acting performance and the lasting performance are complementary and good, the compound effect is good for barnyard grass, large crabgrass, meadowfoam and piemarker, the compound effect belongs to obvious synergistic action for gramineous weeds such as barnyard grass and large crabgrass, and addition action for broadleaf weeds such as meadowfoam and piemarker, 150-300 g of a.i./ha and 150-300 g of sulfentrazone are recommended to be compounded, namely the quinclorac: the mass ratio of sulfentrazone is 1: 0.5-2.

Example 2 field Effect measurement

First, test conditions

Selection of crops and cultivars:

the rice is planted in a direct seeding mode in 6 months and 20 days in 2018, and the rice is irrigated in a flood mode after seeding.

Selection of weeds for test subjects:

barnyard grass, large crabgrass, green bristlegrass herb, purslane and rice grass.

The cultivation conditions are as follows:

the test paddy field was set in Sujia village in the historic city of Jinan city, Shandong province. The test field is loam, the organic matter content is about 1.7 percent, and the pH value is 7.2. The weeds in the test field are uniformly distributed, so that no other herbicide is applied in the whole test period; no disease and pest are generated during application, and in addition, 50kg of controlled release fertilizer is applied to each mu of rice while the rice is sowed.

The test terrain is smooth, the management is consistent, and the fertility and the water pouring conditions are good.

Wheat is planted in the previous crop of the test field, and the herbicide is mesosulfuron-methyl and florasulam.

Second, design of experiment

(I) test agent

25% of quinclorac suspending agent, 40% of sulfentrazone suspending agent and 30% of quinclorac suspending agent (3 proportions are recommended to design through indoor experiments to prepare the 30% of quinclorac suspending agent, and the quinclorac and the sulfentrazone are respectively 1:0.5, 1:1 and 1: 1.5).

(II) method of use

The spraying apparatus was a better than high-grade knapsack sprayer, and the treatments were sprayed evenly by adding 450 liters of water per hectare. And (3) uniformly spraying stems and leaves of annual weeds in the 2-5 leaf stage in the paddy field.

(III) the time and frequency of application

The test was performed in 2018, 7 and 2 days, with one application. When the pesticide is applied, 3 leaves of rice grow well; in the 2-5 leaf stage of field weeds, barnyard grass, large crabgrass, green bristlegrass herb, purslane and rice grass are taken as main materials.

2.3 method of calculating drug efficacy

Calculating the formula:

230% of quinclorac is applied to the determination of the effect of the suspension agent in rice field (investigation 30d after pesticide application)

Test results show that the 25% quinclorac suspending agent has good effect on the grassy weeds, namely cockspur grass, has poor effect on the other 2 grassy weeds, namely green bristlegrass and crab grass, and has no effect on broad-leaf weeds, namely purslane and rice coated grass; the 40% sulfentrazone suspending agent has good effect on broad-leaved weeds including ricepaper plant and purslane, also has good effect on gramineous weeds including green bristlegrass and barnyard grass, and has poor effect on another gramineous weed including large crabgrass, and the agent has the advantages that the weed reaction speed is high, and the weed begins to dry and die in 2 days after application.

The two compound preparations are prepared by mixing 30% of quinclorac as the first herbicide and the second herbicide, have the advantages of integrating two single preparations, having good quick-acting property and lasting effect, complementing the advantages of a weed control spectrum, having good effects on gramineous weeds such as barnyard grass, crab grass, green bristlegrass, purslane and ricepaper, and having 3 proportions better than the two single preparations.

30 percent of quinclorac is safe to rice.

Example 3 field Effect measurement

First, test conditions

Selection of crops and cultivars:

the rice is planted in the way that the variety of the rice is 18 years old and the rice is directly sown in 6 months and 10 days in 2018.

Selection of weeds for test subjects:

green bristlegrass herb, cockspur grass, abutilon, redroot amaranth.

The cultivation conditions are as follows:

the test wheat field is located in the Diyue district of Taian city, Shandong province. The test field is loam, the organic matter content is about 1.4 percent, and the pH value is 7.8. The weeds were evenly distributed in the test field so no other herbicide was applied throughout the test period.

Wheat is planted in the previous crop of the test field, and the herbicide is florasulam and fluroxypyr.

Second, design of experiment

(I) test agent

(II) method of use

(III) the time and frequency of application

The test was performed in 2018 on day 6 and 23, with a total of one application. The rice is in the 2-3 leaf stage when the pesticide is applied.

Third, the calculation method of the drug effect

Calculating the formula:

the effect of 330 percent of quinclorac in rice field is determined (investigation after application in 25 d)

Test results show that the 25% quinclorac suspending agent has good effect on cockspur grass, poor effect on green bristlegrass and no effect on piemarker and amaranthus retroflexus; the 40% sulfentrazone suspending agent has better effect on various weeds, and the agent has the greatest advantage of high action speed. The two compound preparations are 30% of quinclorac as a suspension agent of the same as the sulfentrazone, have the advantages of integrating two single agents, having good quick action and persistence, having good effects on broad-leaved weeds such as abutilon, redroot amaranth, gramineous weeds such as green bristlegrass and cockspur grass, and 3 mixture ratios are far better than the two single agents.

30 percent of quinclorac is safe to rice.

The foregoing is only a preferred embodiment of this patent, and it should be noted that, for those skilled in the art, it would be obvious to those skilled in the art that various modifications and substitutions can be made without departing from the technical principle of this patent, such as adding herbicide such as atrazine or terbuthylazine, and these modifications and substitutions should be considered as the protection scope of this patent.

Claims

1. A herbicide composition containing quinclorac, sulfentrazone quinclorac and sulfentrazone is characterized in that: the weight ratio of the quinclorac to the sulfentrazone is 1:0.125-1: 8.

2. The herbicide composition containing quinclorac and sulfentrazone as claimed in claim 1, wherein: the weight ratio of the quinclorac to the sulfentrazone is 1: 0.5-2.

3. A herbicidal composition containing quinclorac and sulfentrazone according to claim 2, characterized in that: the weight ratio of the quinclorac to the sulfentrazone is 1:0.5, 1:1 and 1: 1.5.

4. A herbicidal composition containing quinclorac and sulfentrazone according to any one of claims 1 to 3, characterized in that: the herbicide composition preparation is an acceptable pesticide formulation of missible oil, aqueous suspension, oil suspension, wettable powder, granules or water dispersible granules.

5. A herbicidal composition containing quinclorac and sulfentrazone according to any one of claims 1 to 3, characterized in that: the herbicide composition is used for preventing and killing cockspur grass, crabgrass, rice grass and abutilon grass weeds in paddy fields.