Herbicide composition for preventing and treating amaranthus retroflexus in alfalfa field and application of herbicide composition

Abstract

The invention discloses a herbicide composition for preventing and treating amaranthus retroflexus in alfalfa fields and application thereof, and belongs to the technical field of herbicides, the herbicide composition comprises a component A and a component B. The component A is imazethapyr / or 2, 4-sodium butyrate, and the component B is haloxyfop-R-methyl; the composition has good selectivity to alfalfa and can effectively prevent and control amaranthus retroflexus, the earlier the pesticide application period is, the better the control effect is, the damage to alfalfa plants is small, and normal growth of alfalfa is guaranteed. Due to the fact that the composition contains imazethapyr or 2, 4-sodium butyrate, and the ingredients have a certain residual period, the weeding effect can be continuously achieved in a long time, the pesticide application frequency is reduced, and the labor intensity and cost are reduced. The 2, 4-D sodium butyrate and the compound thereof have a better control effect on amaranthus retroflexus and are high in safety to medicago parasitica. The invention provides an effective and safe herbicide for controlling amaranthus retroflexus in alfalfa fields.

Description

Technical Field

[0001] The invention relates to the technical field of herbicides, and more particularly to a herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields and application thereof. Background Art

[0002] Alfalfa (Medicago sativa) is widely cultivated in the region because of its high yield, high crude protein content, and good palatability. The planting area of ​​alfalfa increased rapidly from 2010 to 2020, with a growth rate of 329.3%, becoming the largest and most widely distributed artificial forage variety in the region. During the establishment of alfalfa in Horqin, due to the limitations of temperature, native perennial weeds in sandy land, and cultivation technology, the seedlings of alfalfa grew slowly in the year of establishment and after wintering, while the native weeds grew quickly. The frequent occurrence of weeds in the field became the main factor in the production of significantly high-quality alfalfa, especially Amaranthus retroflexus L., which seriously affected the yield of alfalfa and affected the harvest of alfalfa, resulting in a decline in the quality of alfalfa. Therefore, it is of great significance to study the effects of high-efficiency chemical herbicides and their application patterns on alfalfa yield and weed suppression in alfalfa production fields for the establishment of high-quality alfalfa artificial grasslands. A large amount of practice has shown that the use of chemical herbicides such as imazapic, fluazifop-butyl, and 2,4-D butyrate sodium salt on leguminous plants can effectively suppress the incidence of weeds in the field.

[0003] Imidazolinone is an imidazolinone herbicide that has excellent control effects on annual and perennial grass weeds, broadleaf weeds, and sedge weeds in leguminous plant fields, such as Amaranth, Polygonum, Chenopodium, Solanum nigrum, Barnyard grass, Setaria, Digitaria, and Millet. Imidazolinone is an acetolactate synthase (ALS) inhibitor, which is absorbed by weed roots, stems, and leaves, and conducted in the xylem and phloem, accumulating in the plant meristem, inhibiting the plant's acetolactate synthase, preventing the biosynthesis of branched-chain amino acids such as valine, leucine, and isoleucine, thereby destroying protein synthesis, interfering with DNA synthesis and cell division and growth, and ultimately causing plant death. 2,4-D butyrate sodium salt is a hormone-type selective herbicide. It has strong internal absorption conductivity and high efficiency. It is mainly used for stem and leaf treatment after the seedling stage. It has good expansion and permeability, is easy to enter the plant body, is not easily washed by rainwater, is sensitive to dicotyledonous weeds, and is safe for food crops. High-efficiency flupyroxypyr is a selective herbicide with a molecular formula of C16H13ClF3NO4. It has excellent control effects on perennial stubborn grass weeds such as reeds, white grass, and bermudagrass. After application, high-efficiency flupyroxypyr can be quickly absorbed by the leaves of grass weeds and transmitted to the entire plant, inhibiting the growth of plant meristems and thus killing weeds. It has a long lasting effect and has a good control effect on annual and perennial grass weeds from seedling emergence to tillering and heading.

[0004] At present, the main methods for preventing and controlling Amaranthus retroflexus in alfalfa fields include mechanical weeding and chemical weeding. Although mechanical weeding is environmentally friendly, it has high labor intensity, low efficiency, and is difficult to completely kill weeds. Chemical weeding uses herbicides to suppress or eliminate weeds, which has the advantages of high efficiency and easy operation. However, when preventing and controlling Amaranthus retroflexus, existing chemical herbicides often face problems such as poor efficacy, low selectivity, and certain phytotoxicity to alfalfa after application. Therefore, there is an urgent need for a new, efficient, selective and safe herbicide composition for alfalfa. Summary of the invention

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a herbicide composition for controlling Amaranthus retroflexus in alfalfa fields and its application, which can effectively control Amaranthus retroflexus in alfalfa fields, continuously exert the weed control effect for a long time, reduce the number of pesticide applications, and reduce labor intensity and cost.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields, comprising component A and component B, wherein component A is imazethapyr / or 2,4-D butyrate sodium salt, and component B is high-efficiency haloxyfop-p-ethyl;

[0010] When component A is imazethapyr and component B is haloxyfop-butyl, the weight ratio of component A to component B is 10 to 16:15;

[0011] When component A is 2,4-D butyrate sodium salt and component B is high-efficiency fluazifop-p-ethyl, the weight ratio of component A to component B is 5 to 8:2.

[0012] According to the above characteristics, the total mass percentage of imazethapyr, 2,4-D butyrate sodium salt and haloxyfop-butyl in the herbicide composition is 15.8% to 43.8%.

[0013] In some embodiments, the preparation method of the herbicide composition for controlling Amaranthus retroflexus in alfalfa fields comprises the following steps:

[0014] 1) Place component A and component B in a mixing container and stir them evenly using a stirring device to ensure that the two components are completely mixed;

[0015] 2) Add appropriate amount of solvent, emulsifier and stabilizer as needed to improve the stability and effect of the herbicide, and continue stirring to ensure that all ingredients are evenly distributed;

[0016] 3) filtering the mixed herbicide composition through a filtering device to remove possible impurities and insoluble particles;

[0017] 4) The prepared herbicide composition is placed in a suitable packaging container and sealed.

[0018] According to the above characteristics, the herbicide composition is an emulsifiable concentrate.

[0019] In some embodiments, the stem and leaf spraying treatment is carried out when the alfalfa is in the 2-6 leaf stage, and the amount of effective ingredient used per hectare is 1219.8-1264.8 ml.

[0020] According to the above characteristics, the herbicide composition is applied during the vegetative growth period of Amaranthus retroflexus, which is from June to July.

[0021] In some embodiments, the herbicide composition is used to control Amaranthus retroflexus in alfalfa fields.

[0022] According to the above characteristics, the solvent is selected from one of isopropanol and propylene glycol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] 1) Component A (imidazole or 2,4-D butyrate sodium salt) and component B (halpyrazole-ethyl) in the herbicide composition of the present invention work synergistically to effectively control Amaranthus retroflexus in alfalfa fields. These active ingredients can target and kill weeds more widely and effectively through different mechanisms of action, thereby improving the weed control effect.

[0026] 2) The composition has good selectivity for alfalfa and can effectively prevent and control Amaranthus retroflexus. The earlier the application period, the better the prevention effect. The composition causes less damage to alfalfa plants, thus ensuring the normal growth of alfalfa.

[0027] 3) Since the composition contains imidacloprid or 2,4-D butyrate sodium salt, these ingredients have a certain residual effect period and can continuously exert herbicidal effects for a long time, thereby reducing the number of times of application, and reducing labor intensity and cost.

[0028] 4) The application of 2,4-D butyrate sodium salt and its compound agent has good control effect on Amaranthus retroflexus and high safety to alfalfa, providing an effective and safe herbicide for the control of Amaranthus retroflexus in alfalfa fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a diagram showing the effect of controlling Amaranthus retroflexus in alfalfa field in Example 4 of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] A herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields, comprising component A and component B, wherein component A is imazethapyr and component B is haloxyfop-p-ethyl;

[0033] The weight ratio of component A to component B is 10:15; the total mass percentage of imazethapyr and haloxyfop-butyl in the herbicide composition is 25%.

[0034] In some embodiments, a method for preparing a herbicide composition for controlling Amaranthus retroflexus in alfalfa fields comprises the following steps:

[0035] 1) Place component A and component B in a mixing container and stir them evenly using a stirring device to ensure that the two components are completely mixed;

[0036] 2) Add appropriate amount of solvent, emulsifier and stabilizer as needed to improve the stability and effect of the herbicide, and continue stirring to ensure that all ingredients are evenly distributed;

[0037] 3) filtering the mixed herbicide composition through a filtering device to remove possible impurities and insoluble particles;

[0038] 4) Put the prepared herbicide composition into a suitable packaging container and seal it, wherein the herbicide composition is emulsifiable concentrate.

[0039] The stem and leaf spraying treatment was carried out when the alfalfa was in the 2-leaf stage, with an effective ingredient dosage of 1219.8 ml per hectare. The herbicide combination was applied during the vegetative growth period of Amaranthus retroflexus, which was June.

[0040] The herbicide composition is used in controlling Amaranthus retroflexus in alfalfa fields, the solvent is isopropyl alcohol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0041] Example 2

[0042] A herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields, comprising component A and component B, wherein component A is imazethapyr and component B is haloxyfop-p-ethyl;

[0043] The weight ratio of component A to component B is 14:15; the total mass percentage of imazethapyr and haloxyfop-butyl in the herbicide composition is 40.6%.

[0044] The preparation method is the same as that of Example 1

[0045] The stem and leaf spraying was carried out when alfalfa was in the 4-leaf stage, with an effective ingredient dosage of 1219.8 ml per hectare. The herbicide combination was applied during the vegetative growth period of Amaranthus retroflexus, which was June.

[0046] The herbicide composition is used in controlling Amaranthus retroflexus in alfalfa fields, the solvent is isopropyl alcohol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0047] Example 3

[0048] A herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields, comprising component A and component B, wherein component A is imazethapyr and component B is haloxyfop-p-ethyl;

[0049] The weight ratio of component A to component B is 16:15; the total mass percentage of imazethapyr and haloxyfop-butyl in the herbicide composition is 43.4%.

[0050] The preparation method is the same as that of Example 1

[0051] The stem and leaf spraying was carried out when the alfalfa was in the 6-leaf stage, with an effective ingredient dosage of 1219.8 ml per hectare. The herbicide combination was applied during the vegetative growth period of Amaranthus retroflexus, which was July.

[0052] The herbicide composition is used in controlling Amaranthus retroflexus in alfalfa fields, the solvent is isopropyl alcohol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0053] Example 4

[0054] A herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields comprises component A and component B, wherein component A is 2,4-D butyrate sodium salt, and component B is highly effective haloxyfop-ethyl; the weight ratio of component A to component B is 5:2. The total mass percentage of 2,4-D butyrate sodium salt and highly effective haloxyfop-ethyl in the herbicide composition is 21%.

[0055] The preparation method is the same as that of Example 1

[0056] The stem and leaf spraying treatment was carried out when the alfalfa had 2 to 6 leaves, with an effective ingredient dosage of 1222.8 ml per hectare. The herbicide composition was applied during the vegetative growth period of Amaranthus retroflexus, which was June.

[0057] The herbicide composition is used in controlling Amaranthus retroflexus in alfalfa fields. The solvent is selected from one of isopropanol and propylene glycol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0058] Example 5

[0059] A herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields comprises component A and component B, wherein component A is 2,4-D butyrate sodium salt, and component B is highly effective haloxyfop-ethyl; the weight ratio of component A to component B is 7:2. The total mass percentage of 2,4-D butyrate sodium salt and highly effective haloxyfop-ethyl in the herbicide composition is 32.4%.

[0060] The preparation method is the same as that of Example 1

[0061] The stem and leaf spraying treatment was carried out when the alfalfa had 2 to 6 leaves, with an effective ingredient dosage of 1245.7 ml per hectare. The herbicide composition was applied during the vegetative growth period of Amaranthus retroflexus, which was June.

[0062] The herbicide composition is used in controlling Amaranthus retroflexus in alfalfa fields. The solvent is selected from one of isopropanol and propylene glycol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0063] Example 6

[0064] A herbicide composition for preventing and controlling Amaranthus retroflexus in alfalfa fields comprises component A and component B, wherein component A is 2,4-D butyrate sodium salt, and component B is highly effective haloxyfop-ethyl; the weight ratio of component A to component B is 8:2. The total mass percentage of 2,4-D butyrate sodium salt and highly effective haloxyfop-ethyl in the herbicide composition is 43%.

[0065] The preparation method is the same as that of Example 1

[0066] The stem and leaf spraying treatment was carried out when the alfalfa had 2 to 6 leaves, with an effective ingredient dosage of 1264.8 ml per hectare. The herbicide composition was applied during the vegetative growth period of Amaranthus retroflexus, which was July.

[0067] The herbicide composition is used in controlling Amaranthus retroflexus in alfalfa fields. The solvent is selected from one of isopropanol and propylene glycol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0068] Experimental example

[0069] The experiment was conducted after the first crop of newly sown alfalfa fields was cut. A two-factor split-plot design of spraying concentration and spraying period was adopted. Three spraying periods were set up with alfalfa at 2, 4, and 6 leaf ages as the main plots, and different herbicide types and dosages were used as sub-plots. The main and sub-plots were completely randomly arranged. The experimental plot area was 3m×3m, with an interval of 1.0m between plots, and repeated 3 times. The stems and leaves were sprayed with a handheld sprayer (50L), and the watering rate for each treatment was 750L / hm 2 The blank control plot was 750 L / hm 2 Clean water treatment, as shown in Table 1:

[0070] Table 1 Different herbicides and dosage

[0071]

[0072] Fifteen days after spraying the herbicide, 0.5 m 2 The height of alfalfa branches was measured, and the alfalfa damage grade was counted and recorded. 2 Determine the fresh weight, plant height, and number of branches of alfalfa and Amaranthus retroflexus. Calculate the plant control effect, fresh weight control effect, and plant height inhibition rate respectively. The degree of pesticide damage (Table 2) and frequency can be estimated according to the national standard method, and the symptoms of pesticide damage can be described. Calculate the weed plant control effect, plant height inhibition rate, and fresh weight control effect after different application rates; the safety investigation is to investigate whether there is any pesticide damage or inhibition to alfalfa after the use of the drug. Calculation formula:

[0073] Plant control effect (%) = (average number of weeds in the control group - average number of weeds remaining after treatment) / average number of weeds in the control group × 100

[0074] Plant height inhibition rate (%) = (control weed plant height - treated weed plant height) / control weed plant height × 100

[0075] Fresh weight control effect (%) = (fresh weight of weeds in the control group - fresh weight of weeds after treatment) / fresh weight of weeds in the control group × 100

[0076] Table 2 Classification standards for alfalfa pesticide damage

[0077]

[0078] The results of the drug-related injury follow-up survey are as follows:

[0079] In the early stage of each pesticide application, there was a slight damage to alfalfa, but it recovered to normal growth later. The damage classification of each tested pesticide treatment is shown in Table 3.

[0080] Table 3 The damage of different herbicides to alfalfa at 15 and 30 days after application at three different leaf stages

[0081]

[0082] The herbicides were found to cause phytotoxicity to alfalfa at the two, four, and six leaf stages. At the two leaf stage, all herbicides did not cause phytotoxicity (Table 4). In Examples 2, 3, and 4, the four-leaf stage alfalfa showed Grade 1 phytotoxicity on the 15th day, and the phytotoxicity disappeared as the treatment time was prolonged. In Examples 2 and 4, the six-leaf stage alfalfa showed Grade 2 phytotoxicity on the 15th day, and in Examples 1 and 4, the six-leaf stage alfalfa showed Grade 1 phytotoxicity on the 15th day. As the treatment time was prolonged, in Examples 2, 3, and 4, the six-leaf stage alfalfa showed Grade 1 phytotoxicity on the 30th day. The results showed that 15 days before application, the safety of each herbicide on alfalfa at the four-leaf stage and the six-leaf stage was lower than that at the two-leaf stage.

[0083] Table 4 Effects of different herbicides sprayed at different times on the plant height of Amaranthus retroflexus (cm)

[0084]

[0085] Note: Different capital letters indicate that the plant height of Amaranthus retroflexus sprayed with different herbicides at the same leaf age was significantly different compared with the control (P<0.05); different lowercase letters indicate that the plant height of Amaranthus retroflexus sprayed with the same herbicide at different leaf ages was significantly different compared with the control (P<0.05), the same below.

[0086] As shown in Table 4, when the leaf age is 2, the best inhibitory effect on the height of Amaranthus retroflexus plant is achieved under the treatment of Example 2, the second best inhibitory effect on the height of Amaranthus retroflexus plant is achieved under the treatment of Example 4, and the other treatments have no significant inhibitory effect on the height of Amaranthus retroflexus plant. When the leaf age is 4 and 6, the best inhibitory effect on the height of Amaranthus retroflexus plant is achieved under the treatment of Example 4, the second best inhibitory effect on the height of Amaranthus retroflexus plant is achieved under the treatment of Example 3, and the other treatments have no significant inhibitory effect on the height of Amaranthus retroflexus plant. The inhibitory effect on the height of Amaranthus retroflexus plant is the greatest when the leaf age is 6 under the treatment of Example 4, Example 1, and Example 2.

[0087] Table 5 Effects of different herbicides sprayed at different times on the fresh weight of Amaranthus retroflexus (t·hm -2 )

[0088]

[0089] As shown in Table 5, the fresh weight of Amaranthus retroflexus sprayed with herbicides at 2, 4 and 6 leaf ages was significantly lower than that of the control CK spray, among which the treatment of Example 4 had the greatest inhibitory effect on the fresh weight of Amaranthus retroflexus, and the treatment of Example 3 had the second-best inhibitory effect on the fresh weight of Amaranthus retroflexus at 2 and 4 leaf ages. The fresh weight of Amaranthus retroflexus after the herbicide spraying treatment was the smallest when the alfalfa was 2 leaf age.

[0090] Table 6 Plant control effect of herbicides sprayed at different times (%)

[0091]

[0092] Under the treatment of different herbicides at the same leaf age (2 leaf age), the weed control effect of Example 4 was significantly higher than that of Example 3, and the overall change pattern was Example 4> Example 2> Example 3> Example 1. At the 4 leaf age stage, both herbicides showed a pattern that the control effect of high concentration was significantly greater than that of low concentration (P < 0.05). There was no significant difference in the control effect of different treatments at the 6 leaf age stage (P > 0.05). Under the treatment of different leaf ages with the same herbicide concentration, except for the treatment of Example 1, the overall change trend was that the weed control effect decreased with the increase of leaf age.

[0093] Table 7 Fresh weight control effect of herbicides sprayed at different times (%)

[0094]

[0095] As shown in Table 7, the fresh weight control effect of 2,4-D sodium butyrate spraying treatment was greater than that of imidacloprid, but there was no significant difference in the fresh weight control effect between the two spraying concentrations of the same herbicide. As the number of leaf ages of alfalfa increased, the effect of the herbicide on the fresh weight control effect of weeds decreased significantly (P < 0.05). The fresh weight control effect of spraying Example 3 on weeds at 2 leaf ages was the greatest.

[0096] Table 8 Plant height inhibition rate under herbicide spraying at different periods (%)

[0097]

[0098] As shown in Table 8, the plant height inhibition rates of the two treatments of 2,4-D sodium butyrate were significantly greater than those of Example 1 (P < 0.05), but were not significantly different from those of Example 2 (P > 0.05). As the leaf age of alfalfa increased, the pre-production rate of alfalfa after spraying the herbicide increased significantly.

[0099] The above results show that the application of Example 4 can significantly inhibit the growth of Amaranthus retroflexus in alfalfa fields. The composition has a better effect when applied at the two-leaf stage of alfalfa.

[0100] The invention proves that 2,4-D butyrate sodium salt and its mixed agent have certain application value in preventing and controlling Amaranthus retroflexus, and achieves an ideal overall prevention effect on Amaranthus retroflexus on the premise of ensuring the safety of alfalfa.

[0101] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A herbicide composition for controlling Amaranthus retroflexus in alfalfa fields, characterized in that: The invention comprises component A and component B, wherein component A is imazethapyr / or 2,4-D butyrate sodium salt, and component B is highly effective haloxyfop-p-butyl; When component A is imazethapyr and component B is haloxyfop-butyl, the weight ratio of component A to component B is 10 to 16:15; When component A is 2,4-D butyrate sodium salt and component B is high-efficiency fluazifop-p-ethyl, the weight ratio of component A to component B is 5 to 8:

2.

2. The herbicide composition for controlling Amaranthus retroflexus in alfalfa field according to claim 1, characterized in that: The total mass percentage of imazethapyr, 2,4-D butyrate sodium salt and haloxyfop-butyl in the herbicide composition is 15.8% to 43.8%.

3. The method for preparing a herbicide composition for controlling Amaranthus retroflexus in alfalfa field according to claim 1, characterized in that The steps include: 1) Place component A and component B in a mixing container and stir them evenly using a stirring device to ensure that the two components are completely mixed; 2) Add appropriate amount of solvent, emulsifier and stabilizer as needed to improve the stability and effect of the herbicide, and continue stirring to ensure that all ingredients are evenly distributed; 3) filtering the mixed herbicide composition through a filtering device to remove possible impurities and insoluble particles; 4) The prepared herbicide composition is placed in a suitable packaging container and sealed.

4. The method for preparing a herbicide composition for controlling Amaranthus retroflexus in alfalfa field according to claim 3, characterized in that: The herbicide composition is an emulsifiable concentrate.

5. The use of a herbicide composition for controlling Amaranthus retroflexus in alfalfa field according to claims 1 to 4, characterized in that: When alfalfa is in the 2-6 leaf stage, stem and leaf spraying is carried out, with the amount of active ingredient per hectare being 1219.8-1264.8 ml.

6. The use of a herbicide composition for controlling Amaranthus retroflexus in alfalfa field according to claim 5, characterized in that: The herbicide composition is applied during the vegetative growth period of Amaranthus retroflexus, which is from June to July.

7. The use of a herbicide composition for controlling Amaranthus retroflexus in alfalfa field according to claim 5, characterized in that: The herbicide composition is used in controlling Amaranthus retroflexus in alfalfa fields.

8. The use of a herbicide composition for controlling Amaranthus retroflexus in alfalfa field according to claim 3, characterized in that: The solvent is selected from one of isopropanol and propylene glycol, the emulsifier is sodium dodecyl sulfate, and the stabilizer is 2,6-di-tert-butyl-p-cresol.

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