CN112806377B - Herbicide composition and application thereof in decrement-synergism grass control - Google Patents

Herbicide composition and application thereof in decrement-synergism grass control Download PDF

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CN112806377B
CN112806377B CN202110151379.6A CN202110151379A CN112806377B CN 112806377 B CN112806377 B CN 112806377B CN 202110151379 A CN202110151379 A CN 202110151379A CN 112806377 B CN112806377 B CN 112806377B
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saflufenacil
clopyralid
alternanthera philoxeroides
herbicide composition
herbicide
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CN112806377A (en
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王红春
娄远来
徐蓬
陈俊敏
付朝晋
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Jiangsu Academy of Agricultural Sciences
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Jiangsu Academy of Agricultural Sciences
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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
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protecting plants
    • 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
    • A01N25/02—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 containing liquids as carriers, diluents or solvents
    • A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
    • 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
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Environmental Sciences (AREA)
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  • Engineering & Computer Science (AREA)
  • Plant Pathology (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
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  • Agronomy & Crop Science (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention relates to a herbicide composition containing clopyralid and saflufenacil and application thereof, wherein the active ingredients of the herbicide composition are clopyralid and saflufenacil, the mass ratio of the clopyralid to the saflufenacil is 1:5-5:1, and the clopyralid to the saflufenacil and auxiliary agents and/or fillers allowed in pesticides are prepared into corresponding dosage forms for controlling alternanthera philoxeroides. The composition shows obvious synergistic effect on controlling the alternanthera philoxeroides in the proportioning range, is small in dosage and low in cost, has a comprehensive prevention effect on the fresh weight of the overground part of the alternanthera philoxeroides of more than 95% and a regeneration prevention effect on underground rhizomes of more than 60% by one-time application, and basically controls the annual damage of the alternanthera philoxeroides. The herbicide composition containing clopyralid and saflufenacil is applied once, the annual harm of the alternanthera philoxeroides is basically controlled, the herbicide dosage is reduced by more than 70 percent compared with a conventional three-time application prevention and control scheme of a chemical removal formula, the adverse effect of pesticides on the ecological environment is reduced, and the sustainable treatment of the alternanthera philoxeroides is promoted.

Description

Herbicide composition and application thereof in decrement-synergism grass control
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to a herbicide composition containing clopyralid and saflufenacil for controlling alternanthera philoxeroides and application thereof in decrement-synergism control of alternanthera philoxeroides.
Background
The alternanthera philoxeroides (also called alternanthera philoxeroides) is an external invasive weed, once invading a suitable area, the expanding and spreading speed is extremely high, the alternanthera philoxeroides can invade water areas and wetlands in a short time, a large-area single plant community is formed, and ecological disasters are caused. In the middle and lower reaches of the Yangtze river, the water peanuts invade river channels, ponds, fish ponds, lakes and farmlands, threaten shipping, irrigation, aquaculture, agricultural production, ecological environment and the like, and have serious influence on rural human living environment and water ecological environment. At the present stage, manual or mechanical salvaging and herbicide spraying are the main methods for preventing and controlling the alternanthera philoxeroides. However, the labor intensity of manual or mechanical salvaging is high, the cost is high, the salvaging is not thorough, the plant residues can quickly spread to form a flood, and the property is damaged by the lawful people; the conventional chemical removal agent is only effective on the overground part of the alternanthera philoxeroides, the regeneration of underground (or underwater) rhizomes of the alternanthera philoxeroides is difficult to inhibit, the annual harm of the alternanthera philoxeroides is difficult to control after 3-4 times of chemical removal every year, the cost is high, the environmental ecological risk is large, the symptoms and root causes are not treated, and the prevention and control pressure is increased year by year. The development of the herbicide composition which is efficient, safe, low-toxicity, economical and safe, and basically controls the annual harm of the alternanthera philoxeroides after one-time application has important significance for the sustainable treatment of the alternanthera philoxeroides.
Clopyralid, chemical name: 3, 6-dichloropyridine-2-carboxylic acid, an artificially synthesized plant growth hormone. After application, it is absorbed by the leaves or roots of the plant, moves up and down in the plant body and is rapidly conducted to the whole plant. The clopyralid with low concentration can stimulate the synthesis of DNA, RNA and protein of plants, so that the cells are out of control in division and disordered in growth, and the tube bundle is damaged; high concentrations of clopyralid inhibit cell division and growth. Can prevent and kill off broadleaf weeds of juncus, common racking, big nest and the like.
Saflufenacil, chemical name: n' - [ 2-chloro-4-fluoro-5- [1,2,3, 6-tetrahydro-3-methyl-2, 6-dioxo-4- (trifluoromethyl) pyrimidin-1-yl ] benzoyl ] -N-isopropyl-N-methylsulfonamide, a protoporphyrinogen oxidase inhibitor, is taken up by leaves and roots, transported in vitro, and disrupted in cell membranes by peroxidation of fat, resulting in cell leakage, tissue necrosis, and plant death. Can prevent and kill various broad-leaved weeds such as abutilon, acalypha australis, pencil, ragweed, sticktight, gooseberry, shepherd's purse, descurainia sophia, morning glory, sesbania, black nightshade, cleavers, cocklebur and the like.
So far, no report is made on the compounding of clopyralid and saflufenacil, and no report is made on the use of a compounded composition of clopyralid and saflufenacil for controlling alternanthera philoxeroides.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems that in the prior art, the prevention and control effect on alternanthera philoxeroides is poor, the frequency is high, the symptoms and root causes are treated but not treated, the spreading damage and the regeneration of the alternanthera philoxeroides are difficult to effectively inhibit, the invention provides a herbicide composition containing clopyralid and saflufenacil and application thereof. The intensive research proves that after the clopyralid and the saflufenacil are properly compounded, the herbicide composition with obvious synergism can be obtained, the annual harm of the alternanthera philoxeroides can be controlled by one-time medication, and the sustainable treatment of the alternanthera philoxeroides is facilitated.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
the active ingredients of the herbicide composition are clopyralid and saflufenacil, wherein the mass ratio of the clopyralid to the saflufenacil is 1:50-50:1, preferably 1:20-20:1, more preferably 1:10-10:1, and most preferably 1:5-5: 1.
The herbicide composition containing clopyralid and saflufenacil is characterized in that the sum of the clopyralid and the saflufenacil accounts for 1-90% of the total weight of the herbicide composition.
The herbicide composition takes clopyralid and saflufenacil as active ingredients, and is prepared into corresponding formulations with auxiliary agents and/or fillers allowed in pesticides.
The weeding suspending agent is characterized by being prepared from the following components in percentage by mass:
5-80% of active ingredients (composition of clopyralid and saflufenacil), 3-5% of surfactant, 3-6% of glycol, 1-10% of sodium lignosulphonate, 4-6% of phenethyl phenol polyoxyethylene ether, 2% of magnesium aluminum silicate, 0.5% of defoaming agent, 0.1% of preservative, 0.1% of xanthan gum and the balance of water.
The herbicide composition and the preparation thereof are applied to controlling alternanthera philoxeroides.
The method for controlling the peanut plants is characterized in that the weeding composition preparation is sprayed once in the flowering period of the peanut plants, and is only sprayed once in the whole growth period.
Has the advantages that: compared with the prior art, the herbicide composition containing clopyralid and saflufenacil has the following advantages:
1) the herbicide composition containing clopyralid and saflufenacil shows obvious synergistic effect in a certain proportioning range, the control effect of the composition is obviously improved compared with that of a single agent, the use dosage of the herbicide is reduced, the medication frequency is reduced, the medication cost is reduced, and the adverse effect of pesticide on the ecological environment is reduced.
2) The herbicide composition containing clopyralid and saflufenacil is compounded by two active ingredients with different action mechanisms, can effectively control the spreading harm and the regeneration of the alternanthera philoxeroides, controls the annual harm of the alternanthera philoxeroides after one-time use, makes up the defects and limitations of single-dose use, and realizes the reduction and the control of pesticide damage.
3) The herbicide composition containing clopyralid and saflufenacil has the advantages of quick effect exertion, long lasting period, low use cost, convenient use, time and labor saving, and has great economic and social benefits when being popularized and applied.
Detailed description of the preferred embodiments
The present invention will be further described with reference to the following examples. The following description is only a preferred embodiment of the present invention, and is only for the purpose of describing the present invention, and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the following examples, all percentages are by weight unless otherwise indicated.
First, preparation examples
Example 1: 16% clopyralid-saflufenacil suspending agent
8% of clopyralid, 8% of saflufenacil, 5% of phenethyl phenol polyoxyethylene ether, 6% of sodium lignosulfonate, 5% of glycol, 2% of magnesium aluminum silicate, 0.5% of defoaming agent, 0.1% of preservative, 0.1% of xanthan gum and deionized water to 100%.
The preparation method comprises the following steps:
adding the components into a reaction kettle mixer according to the requirements of components and quality, uniformly stirring, injecting the materials into a multistage sand mill for grinding, discharging the materials after the fineness of the ground materials is 98% and the ground materials pass through 1-5 mu m, putting the materials and the pre-dissolved xanthan gum into a high-shear emulsifying kettle, and emulsifying to obtain the 16% clopyralid-saflufenacil suspending agent.
Example 2: 20% clopyralid-saflufenacil suspending agent
The herbicide composition containing clopyralid and saflufenacil comprises the following components: the selection of clopyralid 10 percent, saflufenacil 10 percent and other auxiliary agents is the same as that of the embodiment 1.
Example 3: 34% clopyralid-saflufenacil suspending agent
The herbicide composition containing clopyralid and saflufenacil comprises the following components: 20% of clopyralid, 14% of saflufenacil, 6% of phenethyl phenol polyoxyethylene ether, 8% of sodium lignosulfonate and the rest of auxiliary agents are the same as in example 1.
Example 4: 70% clopyralid-saflufenacil suspending agent
The herbicide composition containing clopyralid and saflufenacil comprises the following components: 30% of clopyralid, 40% of saflufenacil and 7% of phenethyl phenol polyoxyethylene ether, and the rest is the same as example 3.
Example 5: 60% clopyralid-saflufenacil suspending agent
The herbicide composition containing clopyralid and saflufenacil comprises the following components: 45% of clopyralid, 15% of saflufenacil and the rest are the same as in example 4.
Second, indoor biological activity assay
The combined action of the clopyralid and the saflufenacil on the alternanthera philoxeroides is measured by a whole-plant growth method in a net house, and the grass control effect of the compounding of the two components is evaluated.
Test materials: the alternanthera philoxeroides was collected in leisure fields of agricultural science college of Jiangsu province in 2019 and 7 months.
The test instrument: spray towers, electronic balances, volumetric flasks, triangular flasks, beakers, graduated cylinders, plastic drums, pipettes, and the like.
Preparing a test medicament: weighing clopyralid and saflufenacil raw materials in certain mass, adding acetone to fully dissolve the clopyralid and the saflufenacil raw materials, diluting the mixture by using a 0.1% Tween 80 aqueous solution, and preparing a single-agent mother solution. Setting a series of ratios according to a pre-test, and setting 5-7 concentration gradients for standby in each ratio. Blank control was prepared by adding equal amount of acetone to equal amount of 0.1% aqueous tween 80.
The test method comprises the following steps: a plastic bucket (upper diameter 23cm, lower diameter 16cm, height 20cm) was filled with air-dried fine soil. The soil is horse liver soil, the pH value is 6.7, the organic matter content is 1.6%, and the horse liver soil is air-dried and sieved for later use. Cutting off the stem nodes (3-4 pairs of leaves with adventitious roots) of the alternanthera philoxeroides, planting the stem nodes in a plastic barrel (the upper diameter is 23cm, the lower diameter is 16cm and the height is 20cm) filled with fine soil, placing the stem nodes in a net room for culturing (the temperature is 33 ℃/25 ℃, the illumination is about 12 h/the darkness is 12 h), and culturing 5 plants/barrel. When 8-10 pairs of alligator alternanthera leaves are sprayed, the drug is applied in a spray tower according to the experimental design dosage of stem leaf spraying (the spraying amount is 30L/mu, and the spraying pressure is 0.5 kpa). After the application, the mixture is placed outdoors for 2 hours and then is placed in a net room for culture.
The growth of the alternanthera philoxeroides is regularly observed after the application of the pesticide. The fresh weight of the upper part of the grassland of the hollow lotus seeds is investigated 30 days after the medicine application, and the fresh weight inhibition rate of the upper part of the grassland is calculated. The fresh weight of regenerated branches of the alternanthera philoxeroides is investigated 90 days after the drug administration (namely 60 days after the overground part is cut off), and the inhibition rate is calculated. The Gowing method is adopted to evaluate the combined action of the two mixed medicaments, and the formula is as follows:
fresh weight inhibition (%) - (control weed fresh weight-treated weed fresh weight)/control weed fresh weight × 100
E0(％)＝(X+Y)-(XY/100)
Wherein X is the weed control effect of the treatment group A relative to the control group when the dosage of the herbicide A is p; y is the weed control effect of the treatment group B relative to the control group when the dosage of the herbicide B is q; e0The theoretical control effect is that when the dosage of the herbicide A is p, the dosage of the herbicide B is q. E is the actual control effect when the dosage of the herbicide A is p and the dosage of the herbicide B is q.
When E-E0Value of>At 10% it is synergistic, E-E0Value of<Antagonism at-10%, E-E0When the value is-10%, the additive effect is obtained.
And (3) test results: after the pesticide is applied for 30 days, the clopyralid and the saflufenacil are compounded, the effect of preventing fresh weight of overground parts of the alternanthera philoxeroides is good, the two components are compounded to have obvious synergistic effect, and the combined effect of the clopyralid and the saflufenacil in the ratio of 1:5-5:1 is synergistic effect (Table 1).
TABLE 1 Combined action of clopyralid-saflufenacil mixture on fresh weight of peanut 30 days after application
Figure BDA0002932186580000051
After 90 days (namely 60 days after the overground part is cut off), the clopyralid and the saflufenacil are compounded to have a good inhibition effect on the fresh weight of the overground part of the regenerated branches of the alternanthera philoxeroides, the two components are compounded to have a remarkable synergistic effect, and the combined effect of the clopyralid and the saflufenacil in the ratio of 1:5-5:1 is shown as a synergistic effect (Table 2).
TABLE 2 Combined action of clopyralid-saflufenacil mixture on the fresh weight of regenerated branches of Arachis hypogaea Linne-90 days after application
Figure BDA0002932186580000052
Figure BDA0002932186580000061
The synthetic hormone herbicide clopyralid has a good inhibition effect on various broad-leaved weeds and a long lasting period; the herbicide bensulfuron methyl of protoporphyrinogen oxidase inhibitor has better control effect on various hard-to-control malignant broad-leaved weeds and quick response speed. The mixing of the two can effectively inhibit the overground growth of the alternanthera philoxeroides, has a good inhibition effect on the regeneration of underground rhizomes, and has the advantages of high effect taking speed and long lasting period. The clopyralid and the saflufenacil are mixed according to the proportion of 1:5-5:1, and have a synergistic effect on the alternanthera philoxeroides.
Third, field drug effect test
Reagent to be tested: the mixed herbicide prepared in example 1-5 was selected.
Control agents: 30% aqueous clopyralid (commercially available)
70% saflufenacil water dispersible granule (commercially available)
41% Glyphosate isopropylamine salt aqueous solution (commercially available)
20% fluroxypyr emulsifiable concentrate (commercially available)
Set clear water contrast
The using method comprises the following steps: spraying treatment is carried out on the water peanuts in the vigorous growth period, and the liquid medicine amount is 30 liters per mu.
The application time is as follows: refer to the agricultural department "test criteria for pesticide field efficacy". Treatment groups 1-5 were dosed once, and only once, at the designed dose on day 7, 8 (the vigorous growth phase of Arachis hypogaea). The control groups 6-8 were administered with the conventional chemical removal formula and the treatment groups at the same time, and were administered only once. The control group was administered with 9 doses of the designed dose on 8 days at 7 months, 10 days at 8 months, and 10 days at 9 months, respectively. The control group 10 was administered once, and only once, at the designed dose on day 1 of 7 months using the formulation of example 5. Control group 11 was administered once, and only once, at the designed dose on day 7, day 15 using the formulation of example 5.
Survey object and method: water peanuts. The overground fresh weights of the alternanthera philoxeroides of all the treatment groups and the control group were investigated about 30 days after the drug of the groups 1 to 9 (30 days after the first drug of three drug applications) (flowering period of the alternanthera philoxeroides (8 months and 7 days)); the fresh weight of the overground part of the alternanthera philoxeroides is investigated again in the decay period of the alternanthera philoxeroides (10 months and 25 days) about 108 days after the drug administration.
The test results are shown in Table 3.
TABLE 3 field test results of efficacy
Figure BDA0002932186580000071
As can be seen from Table 3, in the field efficacy test, the fresh weight control effect of the herbicide composition preparations prepared in examples 1-5 on the overground part of the alternanthera philoxeroides is obviously higher than the fresh weight control effect of the single-dose herbicide composition, the conventional chemical removal formula single-dose herbicide composition and the conventional chemical removal formula three-dose herbicide composition, especially the fresh weight control effect on the underground rhizome regeneration part of the alternanthera philoxeroides within 10 months and 25 days. The herbicide composition prepared in the embodiments 1-5 has obvious synergistic effect on the alternanthera philoxeroides, has good prevention and control effect on the regeneration of underground rhizomes of the alternanthera philoxeroides, has the effect remarkably superior to that of a single-agent use and a conventional removal formula, and has the advantages of high prevention effect and long lasting period.
On the other hand, it was found that the treatment group 5 and the control groups 10 and 11 showed that the application time affected the exertion of the drug effect, and that the treatment group 5 exhibited the greatest inhibition of the overground parts of the alternanthera philoxeroides with the liquid chemical at the time of the basal flowering phase of the alternanthera philoxeroides at the application time. The drug is applied earlier than the flowering period (7 months and 1 day), and the early drug application can achieve certain control effect in the early period, but the inhibition effect is not obvious in the whole growth period. The application of the pesticide later than the flowering period (7 months and 15 days) reduces the sensitivity to the pesticide with the increase of the age of the aquatic flowers, so that the pesticide has poor control effect and has no remarkable control effect on the whole growth period.
The weeding composition preparation can obtain an ideal control effect by selecting a specific period and spraying for 1 time, so that the application times are reduced, the labor intensity is reduced, water and medicine resources are saved, more importantly, the application amount is reduced by reducing the application times, and the residual amount of pesticide in a farm land is obviously lower than that of multiple applications. Has important significance for the development of green agriculture.

Claims (6)

1. A weeding composition containing clopyralid and saflufenacil is characterized in that: the active ingredients are clopyralid and saflufenacil, wherein the mass ratio of the clopyralid to the saflufenacil is 1:5-5: 1.
2. A herbicidal composition according to claim 1, characterized in that: the mass ratio of clopyralid to saflufenacil is preferably 1:5, 2:1, 3:1, 1.5:1 or 5: 1.
3. A herbicidal composition according to claim 1, wherein the sum of the mass of clopyralid and saflufenacil accounts for 1-90% of the total weight of the herbicide composition.
4. The herbicide composition as claimed in claim 1, wherein the herbicide composition comprises clopyralid and saflufenacil as active ingredients, and is prepared into corresponding dosage forms with auxiliary agents and/or fillers allowable in pesticides.
5. The weeding suspending agent is characterized by being prepared from the following components in percentage by mass:
5-80% of the herbicidal composition as claimed in any one of claims 1 to 4, 3-5% of a surfactant, 3-6% of ethylene glycol, 1-10% of sodium lignosulfonate, 4-6% of phenethylphenol polyoxyethylene ether, 2% of magnesium aluminum silicate, 0.5% of a defoaming agent, 0.1% of a preservative, 0.1% of xanthan gum and the balance of water.
6. Use of the herbicidal composition of any one of claims 1 to 4 or the herbicidal suspension of claim 5 for controlling alternanthera philoxeroides.
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