CN114651824B - Weeding composition of penoxsulam and cloransulam-methyl and application thereof - Google Patents
Weeding composition of penoxsulam and cloransulam-methyl and application thereof Download PDFInfo
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- CN114651824B CN114651824B CN202011550485.3A CN202011550485A CN114651824B CN 114651824 B CN114651824 B CN 114651824B CN 202011550485 A CN202011550485 A CN 202011550485A CN 114651824 B CN114651824 B CN 114651824B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/12—Powders or granules
- A01N25/14—Powders or granules wettable
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The invention relates to the technical field of pesticide preparations, and discloses a weeding composition containing fenpyrad and cloransulam-methyl and application thereof. The weeding composition comprises metazachlor and cloransulam-methyl. The effective active ingredients of the weeding composition comprise the fenpyrad and the cloransulam-methyl, the two ingredients are mixed mutually, so that interference cannot be generated, a good synergistic effect is shown in a specific range, and the generation of weed drug resistance can be delayed; the prepared water dispersible granule has obviously higher field control effect than that of a single dosage, can reduce the application times, improves the weeding effect of the water dispersible granule, improves the adaptability of the dosage to different water qualities, is more widely applicable to the areas, has special effects on weeds such as crabgrass, barnyard grass, dayflower, abutilon, spiny grass, endive and the like in soybean fields, and has good application prospect.
Description
Technical Field
The invention relates to the technical field of pesticide preparations, in particular to a weeding composition containing fenpyrad and cloransulam-methyl and application thereof.
Background
Penoxsulam (Pyroxasulfone), chemical name: 3- [5- (difluoromethoxy) -1-methyl-3- (trifluoromethyl) pyrazol-4-ylmethyl sulfonyl ] -4, 5-dihydro-5, 5-dimethyl-1, 2-isoxazole belongs to novel isoxazole herbicides, has wide application crops, is mainly used for crops such as corn, cotton, peanut, wheat, sunflower and the like, and can effectively prevent and remove broadleaf weeds such as green bristlegrass, crabgrass, barnyard and the like, amaranthus, stramonium, eggplant and abutilon and the like.
Cloransulam-methyl (chemical name: methyl 3-chloro-2- (5-ethoxy-7-fluoro [1,2,4] triazol [1,5-c ] pyrimidin-2-ylsulfonyl) aminobenzoate belongs to sulfonamide herbicides and is mainly used for preventing and removing broadleaf weeds by spraying stems and leaves of soybean fields.
Herbicide varieties containing a single active ingredient often suffer from varying degrees of deficiencies in agricultural pest control, such as: the weeding spectrum is narrow, weeds easily generate drug resistance after continuous use, the use times are more, the environmental pollution is aggravated, and researches show that the continuous single application of the fenpyrazamine for three years can generate resistance to the fenpyrazamine and even generate interactive resistance to other agents, and after the cloransulam-methyl is applied, soybean leaves easily generate the symptom of fading green and are easy to generate pesticide injury to succeeding crops.
Disclosure of Invention
In view of the above, the invention aims to provide a weeding composition with a synergistic effect, so that the pyriftalid and the cloransulam can synergistically improve the control effect of each other;
another object of the present invention is to provide the use of the above herbicidal composition for crop weeding and for preparing the relevant pesticide formulation;
the invention also aims to provide the water dispersible granule prepared by the weeding composition and the preparation method thereof, so that the water dispersible granule has better disintegration and suspension rate under different water quality conditions, lower foamability, environmental friendliness and convenience in storage and transportation.
In order to achieve the above object, the present invention provides the following technical solutions:
a herbicide composition contains haloxyfop-methyl and cloransulam, or consists of haloxyfop-methyl and cloransulam.
The two effective components of the fenpyrad and the cloransulam-methyl have different action mechanisms and different chemical structures, and the indoor toxicity of the fenpyrad and cloransulam-methyl compound composition is measured, and the result shows that after the fenpyrad and the cloransulam-methyl are compounded, compared with a single agent, the fenpyrad and the cloransulam-methyl have obvious synergistic effect on the prevention effect of the piemarker, and the co-toxicity coefficient is higher than 120 within the range of 1:1-1:10. In the specific embodiment of the invention, the mass ratio of the cloransulam-methyl to the paraquat-methyl is 1:1, 1:3, 1:5, 1:7 or 1:10.
Meanwhile, the invention also provides application of the weeding composition in preventing and controlling crop weeds and application of the weeding composition in preparing pesticide preparations for preventing and controlling crop weeds. Wherein the crop is soybean and the weed is annual and perennial weeds in soybean fields, such as crabgrass, barnyard grass, dayflower, abutilon, spiny grass and endive.
According to the application, the invention also provides a pesticide preparation for controlling crop weeds, which comprises the weeding composition and an auxiliary agent acceptable in pesticides. Any agriculturally acceptable dosage form, preferably wettable powder, suspension, suspoemulsion or water dispersible granule, can be prepared by a person skilled in the art by selecting adjuvants according to methods known in the art.
The invention particularly provides a water dispersible granule, wherein the weeding composition accounts for 30-85% of the total weight, and is preferably 50-85%. In particular embodiments of the invention, the herbicidal composition comprises 30%, 45%, 48%, 50%, 60%, 64%, 70%, 80% or 85% of the total weight.
Preferably, the auxiliary agent in the water dispersible granule is selected from wetting dispersant, disintegrating agent, chelating agent and filler. Wherein the weight percentage of the auxiliary agent is 4-12% of wetting dispersant, 2-6% of disintegrating agent, 1-5% of chelating agent and the balance of filler.
The invention aims at the characteristics of the active ingredients of the medicine: the metazoxazole technical is white solid, n-octanol/water distribution coefficient: logp=2.39 (pH: 8.7, 25 ℃), cloransulam-methyl as white solid, n-octanol/water partition coefficient: logp=1.12 (25 ℃), both active components being relatively hydrophilic prodrugs. According to the invention, the water dispersible granule auxiliary agent is researched and screened, and a preferable water dispersible granule dosage form and an auxiliary agent system are obtained through selecting and collocating a wetting dispersant.
Further, the water dispersible granule is preferably composed of the following components in percentage by weight: 30% -85% (preferably 50% -85%) of pharmaceutical active ingredient, 6-10% of wetting dispersant, 3-5% of disintegrating agent, 2-4% of chelating agent and the balance of filler.
Furthermore, the water dispersible granule is preferably composed of the following components in percentage by weight: 85% of a pharmaceutical active ingredient, 8% of a wetting and dispersing agent, 3% of a disintegrating agent, 2% of a chelating agent and the balance of a filler.
For general water dispersible granules, the wetting and dispersing agent can be one or more of sodium lignin sulfonate, polycarboxylate, alkyl naphthalene sulfonate, mixture of alkyl naphthalene sulfonate sodium formaldehyde polycondensates, alkyl sulfate, nekal BX and ethylene oxide-propylene oxide block copolymer. In an embodiment of the present invention, the wetting dispersant is preferably one or more of alkyl naphthalene sulfonate and sodium lignin sulfonate, more preferably alkyl naphthalene sulfonate and sodium lignin sulfonate in a mass ratio of 1:1-3, and most preferably in a mass ratio of 1:2. In the specific embodiment of the invention, the alkyl naphthalene sulfonate is further selected as Morwet EFW of Achilles, and the sodium lignin sulfonate is further selected as REAX AG 83A of Meinaweishi Weak, so that the compounding effect is optimal.
For general water dispersible granules, the disintegrating agent can be one or more of urea, sodium sulfate, ammonium sulfate, calcium chloride and potassium dihydrogen phosphate. In an embodiment of the present invention, the disintegrating agent is preferably a mixture of urea and ammonium sulfate, more preferably a mixture of urea and ammonium sulfate in a mass ratio of 1-3:1, most preferably in a mass ratio of 2:1.
In the water dispersible granule, the chelating agent is one or more of sodium tripolyphosphate, sodium gluconate, sodium pyrophosphate and disodium edetate, and preferably disodium edetate.
In the water dispersible granule, the filler is crushed by air flow in the processing process until the particle size requirement is met, and no special requirement is imposed on the filler raw material. The filler can be one or more of talcum powder, corn starch, kaolin, white carbon black and diatomite, and is preferably talcum powder.
In some preferred embodiments of the present invention, in the water dispersible granule, the wetting dispersant is alkyl naphthalene sulfonate and sodium lignin sulfonate with a mass ratio of 1:2; the disintegrating agent is a mixture of urea and ammonium sulfate in a mass ratio of 2:1; the chelating agent is disodium ethylenediamine tetraacetate; the filler is talcum powder.
The invention also provides a preparation method of the water dispersible granule, which comprises the following steps: uniformly mixing the halofop-butyl, the clomazone, the wetting dispersant, the disintegrating agent, the chelating agent and the filler, carrying out superfine jet milling, preferably obtaining fine powder with the particle size of 400-800 meshes, mixing the obtained fine powder with water, kneading, extruding and granulating after kneading, and drying (preferably drying the obtained particles at the temperature of 35-60 ℃) to obtain the halofop-butyl/clomazone water dispersible granule product.
The water dispersible granule can be used for preventing and controlling annual and perennial weeds in soybean fields, wherein the weeds can be crabgrass, barnyard grass, dayflower, abutilon, spiny grass, endive and the like.
The beneficial effects of the invention include, but are not limited to, the following effects:
1. the active ingredients of the invention, namely the fenpyrad and the cloransulam-methyl, belong to two herbicides with different action mechanisms, and the two herbicides are mutually mixed without interference, thereby expanding the weeding spectrum and improving the weeding efficiency.
2. The weeding composition has good synergism within a certain mass ratio range, has higher control effect than a single agent, has small dosage, delays the generation of drug resistance of weeds, and is favorable for sustainable development of the environment.
3. The water dispersible granule has special effects on weeds such as crabgrass, barnyard grass, dayflower, abutilon, spiny bearded endive and the like in soybean fields, and has good application prospect.
4. The invention optimizes the types and the contents of the auxiliary agents, prepares the fenpyrad and the cloransulam-methyl into the water dispersible granule, improves the weeding effect of the water dispersible granule, improves the adaptability of the medicament to different water qualities, and is applicable to wider areas.
5. The water dispersible granule provided by the embodiment of the invention has higher control effect than a single dosage, has small dosage, reduces the residue of the medicine in soil, and is more beneficial to sustainable development of the environment.
Detailed Description
The invention discloses a weeding composition containing haloxyfop-methyl and cloransulam-methyl and application thereof, and a person skilled in the art can properly improve process parameters by referring to the content of the weeding composition. It is expressly noted that all such similar substitutions and modifications will be apparent to those skilled in the art, and are deemed to be included in the present invention. While the herbicidal compositions and uses thereof have been described in terms of preferred embodiments, it will be apparent to those skilled in the relevant art that the herbicidal compositions and uses thereof described herein can be modified or appropriately combined to practice and use the techniques of the present invention without departing from the spirit, scope and scope of the invention.
The compositions described herein may be provided in finished formulations, i.e., the materials in the composition are already mixed, or the components of the composition may be provided in a single dosage form, which is directly mixed in a tank or canister prior to use and then diluted to the desired concentration.
The weeding composition containing the fenpyrad and the cloransulam-methyl and the application thereof are further described below.
Example 1: indoor toxicity measurement
The combined action mode of the two-element herbicide is evaluated according to the grand cloud Peel co-toxicity coefficient method, so that the co-toxicity coefficient (CTC) of the two medicaments compounded according to a certain proportion is clear, CTC is smaller than 80 and equal to or less than 120 and is antagonistic, CTC is equal to or less than 80 and equal to or less than 120 and is additive, and CTC is larger than 120 and is synergistic.
The indoor virulence assay was as follows:
the test agents are all provided by Shandong Weifang Runfeng chemical industry Co., ltd.
And (3) test design: after the effective inhibition concentration range of each medicament is determined through pre-test, each medicament is respectively provided with a series of concentration treatments according to the content of the effective components, and clear water is used for comparison. The test material is cultured in a climatic chamber at 25-35 ℃. The quantitative abutilon seeds are sown in a plastic basin with the diameter of 9cm, covered with soil of 1-2 mm, placed in a enamel tray filled with water, and gradually infiltrated with water, sprayed with medicine when the abutilon grows to 2-4 leaves, and transferred into a climatic chamber for standby after treatment. The fresh weight of the overground parts of each treated weed is weighed 30d after the application, and the fresh weight control effect and ED are calculated 50 And the co-toxicity coefficient is calculated by a method for calculating the combined toxicity proposed by grand cloud Pei and the like.
The calculation formula is as follows (the toxicity index of the standard medicament is 100 by using cloransulam-methyl);
theoretical virulence index (TTI) =clodinafop-propargyl ti×p of M Cloransulam-methyl +sulfone metazachlor TI x P Pyricularia sulfone
Wherein: m is a mixture of cloransulam-methyl and metazachlor in different proportions;
P cloransulam-methyl The composition is the proportion of the cloransulam-methyl in the mixture;
P pyricularia sulfone The fenpyrad is the proportion of the fenpyrad in the mixture.
The test results are shown in table 1:
TABLE 1 determination of Abutilon Activity by different ratios of Pyricularia sulfone and cloransulam-methyl
As can be seen from the above table, the ED of cloransulam-methyl and topiramate against abutilon 50 10.25g a.i/hm respectively 2 And 22.52g a.i/hm 2 . The co-toxicity coefficient of the cloransulam-methyl and the paraquat-methyl with the proportion of 1:15 is 92.09, which is more than 80 but less than 120, and the additive effect is shown; the co-toxicity coefficients of the components in the proportions of 1:1, 1:3, 1:5, 1:7 and 1:10 are respectively 122.93, 133.25, 141.15, 134.75 and 121.20 which are respectively greater than 120, and the synergistic effect is expressed by using cloransulam and cloransulam-methylThe synergy is highest when the ratio of the haloxyfop-methyl to the haloxyfop-butyl is 1:5.
Example 2:30% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 20% of haloxyfop-methyl, 10% of cloransulam-methyl, 3% of wetting dispersant Morwet EFW, 3% of REAX AG 83A, 1.5% of disintegrating agent urea, 1.5% of ammonium sulfate, 2% of chelating agent disodium ethylenediamine tetraacetate and 100% of filler talcum powder.
The preparation method comprises the following steps: uniformly mixing the paraquat chloride, the clomazone, the wetting dispersant, the disintegrating agent, the chelating agent and the filler, carrying out superfine air current grinding to obtain a particle size of 400-800 meshes, adding the obtained fine powder into the mixture, kneading the mixture, wherein the water addition amount is 12-30% of the total mass of the material, extruding and granulating the mixture after kneading, and drying the obtained particles at 35-60 ℃ to obtain the paraquat chloride-sulfenamide water dispersible granule product.
Example 3:60% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 45% of the active pharmaceutical ingredients of the fenpyrad, 15% of the cloransulam-methyl, 2% of the wetting dispersant Morwet EFW, 6% of REAX AG 83A, 2% of the disintegrating agent urea, 1% of ammonium sulfate, 3% of the chelating agent disodium ethylenediamine tetraacetate and 100% of the filler talcum powder.
The preparation method is the same as in example 2.
Example 4:75% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 62.5% of halofop-butyl as a medicinal active ingredient, 12.5% of cloransulam-methyl, 3% of wetting dispersant Morwet EFW, 6% of REAX AG 83A, 2.67% of disintegrating agent urea, 1.33% of ammonium sulfate, 3% of chelating agent disodium ethylenediamine tetraacetate and 100% of filler talcum powder.
The preparation method is the same as in example 2.
Example 5:80% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 70% of the active pharmaceutical ingredients of the fenpyrad, 10% of the cloransulam-methyl, 2.5% of wetting dispersant Morwet EFW, 7.5% of REAX AG 83A, 3.75% of disintegrating agent urea, 1.25% of ammonium sulfate, 3% of chelating agent disodium ethylenediamine tetraacetate and 100% of filler talcum powder.
The preparation method is the same as in example 2.
Example 6:85% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 75% of haloxyfop-methyl, 10% of cloransulam-methyl, 2.5% of wetting dispersant Morwet EFW, 7.5% of REAX AG 83A, 3% of disintegrating agent urea, 1% of ammonium sulfate, 4% of chelating agent disodium ethylenediamine tetraacetate and 100% of filler talcum powder.
The preparation method is the same as in example 2.
Example 7:50% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 25% of the active pharmaceutical ingredients of the fenpyrad, 25% of the cloransulam-methyl, 3% of wetting dispersant polycarboxylate (Solvi SC 213), 1% of ethylene oxide-propylene oxide block copolymer, 1% of disintegrant sodium sulfate, 2% of calcium chloride, 1% of chelating agent sodium pyrophosphate and 100% of filler corn starch.
The preparation method is the same as in example 2.
Example 8:45% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 30% of active ingredients of fenpyrad, 15% of cloransulam-methyl, 2% of a mixture of wetting dispersant alkyl naphthalene sulfonic acid sodium salt formaldehyde polycondensate, 1% of nekal BX, 1% of disintegrating agent potassium dihydrogen phosphate, 1% of calcium chloride, 2% of chelating agent sodium gluconate and 100% of filler diatomite.
The preparation method is the same as in example 2.
Example 9:80% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 60% of the active pharmaceutical ingredients of the fenpyrad, 20% of the cloransulam-methyl, 4% of a mixture of wetting dispersant of alkyl naphthalene sulfonic acid sodium salt formaldehyde polycondensate, 8% of alkyl sulfate, 2% of disintegrating agent of monopotassium phosphate, 1% of urea, 2% of chelating agent of sodium tripolyphosphate and 100% of filler white carbon black.
The preparation method is the same as in example 2.
Example 10:48% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 40% of the active pharmaceutical ingredients of the fenpyrad, 8% of the cloransulam-methyl, 3% of the wetting dispersant Morwet EFW, 2% of the alkyl sulfate, 2% of the disintegrant sodium sulfate, 4% of the urea, 5% of the chelating agent of disodium ethylenediamine tetraacetate and 100% of the filler kaolin.
The preparation method is the same as in example 2.
Example 11:64% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 56% of haloxyfop-methyl, 8% of cloransulam-methyl, 4% of wetting dispersant sodium lignin sulfonate (REAX 907 of Medevil Vicat Co.), 7% of alkyl sulfate, 4% of disintegrant ammonium sulfate, 2% of urea, 3% of chelating agent disodium ethylenediamine tetraacetate and 100% of filler talcum powder.
The preparation method is the same as in example 2.
Example 12:30% fenpyrad/cloransulam-methyl water dispersible granule
The formula is as follows: 25% of active pharmaceutical ingredient fenpyrazamine, 5% of cloransulam-methyl, 2% of wetting dispersant naphthalene sulfonic acid formaldehyde condensate sodium salt, 4% of fatty alcohol polyoxyethylene ether sodium sulfate, 2% of disintegrating agent potassium sulfate, 2% of sodium chloride, 3% of chelating agent sodium hexametaphosphate and 100% of filler light calcium carbonate.
The preparation method is the same as in example 2.
Example 13: water dispersible granule product detection
The properties of the products obtained in the above examples were examined and the results are shown in Table 2 below. Wherein the suspension rates of different water qualities (Cwater: hardness 500mg/L, pH=7.0-8.0; 3WHO water: hardness 1026mg/L, pH=6.0-7.0) were measured according to CIPAC MT184, screening (wet screening test) was measured according to CIPAC MT185, and heat storage stability was measured with reference to the requirements of solid preparations in GB/T19136.
The disintegration is expressed by measuring the disintegration time, and is generally defined as being acceptable for less than 3 minutes, and the measuring method is as follows: at 25 ℃, 0.5g of sample particles is added into a 100mL measuring cylinder (cylinder height 22.5cm, inner diameter 28 mm) with a plug and containing 90mL of distilled water, the middle part of the measuring cylinder is clamped, the sample rotates at a constant speed along the center at a speed of 8r/min until the sample is completely disintegrated in the water, and the time is recorded, namely the disintegration time.
Table 2 quality change of water dispersible granule product prepared by compounding haloxyfop-methyl and cloransulam-methyl
As can be seen from Table 2, the products of example 12 were poor in quality before and after heat storage, the products of examples 7-11 were poor in quality after heat storage, and the products of examples 2-6 using the preferred auxiliary agent were good in quality both before heat storage and after heat storage, so that it can be seen that the preferred auxiliary agent plays a key role in product quality.
In addition, as can be seen from examples 2-6, the performance of the water dispersible granule obtained when the content of the effective component of the drug is changed within the range of 30-85% is similar under the condition that the preferable auxiliary agent is selected, which shows that the effect of the content of the drug on the performance of the dosage form is less under the condition that the preferable auxiliary agent component and the content are adopted. The examples 7-11 show that under the condition of using common auxiliary agents, the obtained water dispersible granule has relatively poor performance, and the replacement auxiliary agents have no obvious effect improvement, which shows that the components and the content of the preferable auxiliary agents have obvious improvement effect on the performance of the fenpyrad/cloxaprop-methyl water dispersible granule, and the common auxiliary agents have no effect.
Example 14: pesticide effect test of fenpyrad and cloransulam-methyl compound preparation for controlling weeds in soybean fields in field
The test is carried out in a soybean planting professional cooperation in the peony river city of Heilongjiang province, the soil type is black soil, and the fertility is good. The control agent is 40% of penoxsulam suspending agent and 84% of clomazone water dispersible granule (commercially available). A total of 4 treatments were set up, each: treatment 1: spraying clear water and blank control; treatment 2: the fenpyrad/cloxafen-ethyl water dispersible granules obtained in examples 2-12; treatment 3:40% of a penoxsulam suspending agent; treatment 4:84% of cloransulam-methyl water dispersible granule.
Wherein, the water dispersible granule of the fenpyrad/chlor-sulfentrazone obtained in examples 1-12 is subjected to stem and leaf spraying treatment according to the dosage of the active ingredient of 120 g/hectare, the treatment 3 is subjected to stem and leaf spraying treatment according to the dosage of the active ingredient of 250 g/hectare, and the treatment 4 is subjected to stem and leaf spraying treatment according to the dosage of the active ingredient of 35 g/hectare.
Spraying stems and leaves of the first three leaves of the soybean, and preventing and killing weeds in soybean fields, wherein the weeds in soybean fields comprise broadleaf weeds such as dayflower, piemarker, endive and the like, and grassy weeds such as crabgrass and barnyard grass. The medicine is applied by a worker pesticide-16 knapsack manual sprayer for 1 time, 750kg of water is added according to the dosage of each hectare preparation to prepare medicine liquid, and the medicine liquid is uniformly sprayed according to the medicine liquid quantity in a converted district. With random block arrangement, 4 repetitions, cell area 50m 2 (5m×10m)。
50 days after application, the effect of each treatment on the fresh weight control effect of weeds and the effect on the safety of soybeans were investigated.
The investigation method comprises the following steps: each cell fixes 4 points, each point 0.25m 2 The fresh weight of the undelivered weeds in the area was investigated and the control effect was calculated as follows:
control effect (%) = (fresh weed weight in control zone-fresh weed weight in treated zone) ×100%/fresh weed weight in control zone
The results of controlling weeds in soybean fields are shown in Table 3 below:
table 3 results of field efficacy test of each treatment agent for controlling weeds in soybean fields
As can be seen from the test results in the table 3, the compound of the fenpyrad and the cloransulam-methyl can effectively control the weeds in the soybean field for one year and multiple years, and the control effect of the compound of the fenpyrad and the cloransulam-methyl on the weeds in the soybean field for one year and multiple years after the compound of the fenpyrad and the cloransulam-methyl is 50 days after the compound of the fenpyrad and the clorans-methyl, and the compound of the fenpyrad and the clorans-methyl has obvious better control effect than 2 control medicaments, and shows a synergistic effect. Examples 2-6 using the preferred adjuvants and preferred ratios have significantly better control effects than the other examples. According to the observation of the whole process of the field test, the soybean grows well within the test dosage range, and the phenomenon of phytotoxicity does not occur in each treatment agent, so that the soybean is safe to soybean.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (12)
1. The application of the weeding composition in preventing and controlling crop weeds, wherein the crop weeds comprise crabgrass, barnyard grass, dayflower, abutilon, spiny grass and endive;
the weeding composition comprises haloxyfop-methyl and cloransulam-methyl; the mass ratio of the cloransulam-methyl to the metazachlor is 1:1-1:10.
2. Application of the weeding composition in preparing pesticide preparations for controlling crop weeds, wherein the crop weeds comprise crabgrass, barnyard grass, dayflower, abutilon, spiny grass and endives;
the weeding composition comprises haloxyfop-methyl and cloransulam-methyl; the mass ratio of the cloransulam-methyl to the metazachlor is 1:1-1:10.
3. A pesticide formulation for controlling crop weeds, which is characterized by comprising a weeding composition and a pesticide acceptable auxiliary agent;
the weeding composition comprises haloxyfop-methyl and cloransulam-methyl; the mass ratio of the cloransulam-methyl to the metazachlor is 1:1-1:10;
the auxiliary agent is selected from wetting dispersant, disintegrating agent, chelating agent and filler.
4. A pesticide formulation according to claim 3, in the form of water dispersible granules.
5. A pesticide formulation according to claim 4, characterised in that the herbicidal composition in the water dispersible granule comprises 30% -85% of the total weight.
6. A pesticide formulation according to claim 3, characterised in that the adjuvant comprises 4-12% by weight of wetting dispersant, 2-6% by weight of disintegrant, 1-5% by weight of chelating agent and the balance filler.
7. A pesticide formulation as claimed in claim 3 or claim 6 wherein the wetting dispersant is selected from one or more of sodium lignosulphonate, polycarboxylate, alkyl naphthalene sulphonate, a mixture of sodium alkyl naphthalene sulphonate formaldehyde polycondensates, alkyl sulphate, nekal BX and ethylene oxide-propylene oxide block copolymer.
8. A pesticide formulation as claimed in claim 3 or claim 6 wherein said disintegrant is selected from one or more of urea, sodium sulphate, ammonium sulphate, calcium chloride and potassium dihydrogen phosphate.
9. A pesticide formulation as claimed in claim 3 or claim 6 wherein said chelating agent is selected from one or more of sodium tripolyphosphate, sodium gluconate, sodium pyrophosphate and disodium edetate.
10. The use of a pesticide formulation according to any one of claims 3 to 9 for controlling crop weeds.
11. Use of a pesticide formulation according to any one of claims 3 to 9 for the preparation of a pesticide formulation for controlling crop weeds.
12. The method for preparing a pesticide preparation according to claim 3, wherein the weeding composition, the wetting dispersant, the disintegrating agent, the chelating agent and the filler are uniformly mixed, superfine jet milling is carried out, the obtained fine powder is mixed with water and then kneaded, extrusion granulation is carried out after kneading, and drying is carried out, so that the pesticide preparation of the fenpyrad/cloxaprop-ethyl water dispersible granule is obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011550485.3A CN114651824B (en) | 2020-12-23 | 2020-12-23 | Weeding composition of penoxsulam and cloransulam-methyl and application thereof |
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| CN202011550485.3A CN114651824B (en) | 2020-12-23 | 2020-12-23 | Weeding composition of penoxsulam and cloransulam-methyl and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109526973A (en) * | 2018-12-14 | 2019-03-29 | 青岛清原化合物有限公司 | Ternary weeding composition and its application comprising sulfone pyrrole grass azoles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109526973A (en) * | 2018-12-14 | 2019-03-29 | 青岛清原化合物有限公司 | Ternary weeding composition and its application comprising sulfone pyrrole grass azoles |
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