A pitaya orchard herbicide composition and its preparation method and use method

Abstract

The present invention discloses a pitaya orchard herbicide composition, its preparation method, and its use method, belonging to the field of herbicides. The pitaya orchard herbicide composition of the present invention comprises active ingredients, glufosinate ammonium and fluazifop-ammonium, a synergist, and a waterproof backing film. The active ingredients are glufosinate ammonium and fluazifop-ammonium, the synergist is one or a combination of an acidic solution and seaweed iodine salt, and the waterproof backing film is any one or any combination of polyglutamic acid, sodium silicate, polyvinyl alcohol, and polydimethylsiloxane. This invention can solve technical problems such as the low efficacy of existing herbicides and the reduced weed control effect after adding waterproof materials.

Description

Technical Field

[0001] The invention belongs to the technical field of herbicides, and particularly relates to a pitaya orchard herbicide composition and a preparation method and a use method thereof. Background Art

[0002] Pitaya is a tropical fruit that can be grown year-round in tropical climates. Pitaya cultivation requires careful field management, and weed control techniques can significantly impact yield and quality. Because manual weeding is time-consuming and labor-intensive, the commonly used weed control method is herbicides.

[0003] Weeds in pitaya orchards primarily include annual grasses, grasses, broadleaf weeds, and sedges. Different herbicides are used to control weeds in agricultural and horticultural production. Commonly used herbicides include glyphosate, pretilachlor, chlorsulfuron, carsulfuron, and paraquat. Glyphosate is a broad-spectrum herbicide that can simultaneously eliminate a variety of weed species; pretilachlor is a newer herbicide with advantages in killing weed roots; and herbicides like chlorsulfuron, carsulfuron, and paraquat can be used in conjunction with other herbicides or fertilizers for even better control.

[0004] With the advancement of science and technology, more and more herbicides are being developed for different types of weeds and are eco-degradable. However, many herbicides still face some problems and shortcomings during use, mainly including the following aspects: 1. Reduced efficacy: Herbicides are subject to certain environmental influences during use, such as soil moisture and temperature. These factors have a negative impact on the efficacy of the herbicide, reducing its weed control effect. 2. Easily washed away by water: Many herbicides are easily washed away by water, especially during the rainy season, which leads to herbicide waste and environmental pollution. At the forefront of current related research, there is also the use of some waterproof materials in herbicides to achieve a certain waterproof effect and reduce the poor weed control effect of herbicides sprayed due to rainy weather. However, after adding additives such as waterproof materials, they generally have an inhibitory effect on the weed control effect of the herbicide, which is also one of the biggest problems in the use of herbicide waterproof additive materials. Summary of the Invention

[0005] In response to the above-mentioned deficiencies in the prior art, the present invention provides a pitaya orchard herbicide composition and its preparation and use methods. The present invention can solve technical problems such as low efficacy of existing herbicides and reduced weed control effect after adding waterproof materials.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A pitaya orchard herbicide composition comprises active components and a synergist, wherein the active components are glufosinate ammonium and fluazifop-ammonium, and the synergist is one or a combination of two of an acidic solution and seaweed iodine salt.

[0008] Furthermore, the pitaya orchard herbicide composition also includes a waterproof backing film, and the waterproof film is any one or any combination of polyglutamic acid, sodium silicate, polyvinyl alcohol, and polydimethylsiloxane.

[0009] Furthermore, the acidic solution is Hsinchu edible acid or acetic acid aqueous solution.

[0010] Furthermore, the synergist consists of Hsinchu edible acid and seaweed iodine salt.

[0011] Furthermore, the pitaya orchard herbicide composition uses water as a solvent, and every 100 kg of water contains the following components by weight: 400-600 g of glufosinate ammonium salt, 8-15 g of fluazifop-ammonium, 100-300 mL of acidic solution, 50-300 g of seaweed iodine salt, and 0-30 g of a waterproof film; the total acid content of the acidic solution is 30 g / mL.

[0012] The present invention also provides a method for preparing the pitaya orchard herbicide composition, comprising the following steps: adding glufosinate ammonium, fluazifop-ammonium, and a synergist to water in sequence, stirring and dissolving the mixture while adding to obtain a mixed solution, and then adjusting the pH value of the mixed solution to 4.5-12 using NaOH to obtain the pitaya orchard herbicide composition.

[0013] Furthermore, the preparation method of the pitaya orchard herbicide composition comprises the following steps: adding glufosinate ammonium salt, fluazifop-ammonium propargyl, a synergist, and a waterproof backing film to water in sequence, stirring and dissolving while adding to obtain a mixed solution, and then using NaOH to adjust the pH of the mixed solution to 9-12 to obtain the pitaya orchard herbicide composition.

[0014] The present invention also provides a method for using the pitaya orchard herbicide composition prepared by the preparation method, comprising the following steps: when the weeds in the pitaya orchard grow to 20-30 cm, spraying the entire pitaya orchard at a spraying rate of 180-220 mL / m 2 , spray on sunny days or light rainy days; the temperature on sunny days is 20-30℃, and the air humidity is 30-60%; the light rainy days refer to rainfall <1mm / 24h.

[0015] The present invention has the following beneficial effects:

[0016] The invention is developed for common weeds in pitaya orchards, such as annual grasses, grasses, broadleaf grasses, and sedges. Glufosinate ammonium and fluazifop-ammonium are used as active ingredients. An acidic solution is compounded with seaweed iodine salt to stimulate the activity of the effective ingredients of the herbicides, enhance the adsorption and absorption capacity of the herbicides, improve the efficacy, prolong the action time of the herbicides, and increase the killing rate of the herbicides in killing the common weeds in pitaya orchards.

[0017] To improve the weed control effect of herbicides and reduce the impact of rainy weather on their use, the present invention screens for a waterproof coating that minimizes the effect of the herbicide while maintaining the active ingredients and adjuvant components. Furthermore, the use of other components in the present invention, such as edible acids, can reduce the inhibitory effect of the waterproof coating on the herbicide's weed control effect. This not only protects the herbicide from being washed away by rain, improving the durability of the weed control effect, but also ensures that the waterproof backing film does not inhibit the weed control effect, maintaining the herbicide's weed control performance. The herbicide composition of the present invention can kill weeds in light rain, providing a more efficient and reliable weed control solution for agricultural and horticultural production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The weed control effects of Examples 11-13 and Comparative Examples 8-10 are compared.

[0019] Figure 2 The weed control effects of Examples 15-17 and Comparative Examples 8-10 are compared.

[0020] Figure 3 The following is a comparison of the weed control effects of Examples 11-13, Examples 15-17, and Comparative Examples 8-10. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] The components used in the specific embodiment of the present invention are as follows:

[0023] Glufosinate ammonium salt: active ingredient 20%, dosage form is soluble solution; purchased from Guangxi Tianyuan Biochemical Co., Ltd.

[0024] Fluazifop-ammonium: active ingredient 51%, water dispersible granules; purchased from Shandong Binnong Technology Co., Ltd.

[0025] Hsinchu edible acid: The main component is acetic acid, with a total acid content of 30g / 100ml; purchased from Nanning Tianyuan Sauce Food Factory;

[0026] Seaweed iodized salt: sodium content 38.98%, iodine content 2.25%; purchased from Hunan Xiangheng Salt Chemical Co., Ltd.

[0027] Acetic acid was purchased from Tianjin Fengchuan Chemical Reagent Technology Co., Ltd.

[0028] Sodium iodide: analytical grade; purchased from Tianjin Kemiou Chemical Reagent Co., Ltd.

[0029] Polyglutamic acid was purchased from Hainan Xuri Biotechnology Co., Ltd.

[0030] Sodium silicate: analytical grade; purchased from Tianjin Zhiyuan Chemical Reagent Co., Ltd.

[0031] Polyvinyl alcohol: film-forming agent PVA217; purchased from The Dow Chemical Company, USA;

[0032] Polydimethylsiloxane: dimethyl silicone oil PMX-200; purchased from The Dow Chemical Company, USA.

[0033] Example 1

[0034] A method for preparing a pitaya orchard herbicide composition comprises the following steps:

[0035] (1) Weigh the following raw materials in order: 500 g of glufosinate ammonium salt, 10 g of fluazifop-ammonium propargyl, 100 ml of Hsinchu edible acid, 50 g of seaweed iodized salt, 10 g of polyglutamic acid, and 100 kg of water;

[0036] (2) 3000 ml of water was measured and added to a container, and the weighed raw materials were added to the water in sequence and proportion to dissolve, and stirred with a stirring rod while adding to dissolve. After stirring for 4 minutes, a pre-dissolved solution was obtained, and the remaining water was continued to be added to the pre-dissolved solution to dilute and fix the volume to obtain a mixed solution;

[0037] (3) The pH value of the mixed solution was adjusted to 11.8 using NaOH having a mass concentration of 30%, thereby obtaining a pitaya orchard herbicide composition.

[0038] Example 2

[0039] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 200ml of Hsinchu edible acid, 100g of seaweed iodine salt, 20g of polyglutamic acid, and 100kg of water; the preparation method is the same as that of Example 1.

[0040] Example 3

[0041] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 300 ml of Hsinchu edible acid, 150 g of seaweed iodine salt, 30 g of polyglutamic acid, and 100 kg of water; the preparation method is the same as that of Example 1.

[0042] Example 4

[0043] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 80g of seaweed iodine salt, 10g of polyglutamic acid, and 100kg of water; the preparation method is the same as that of Example 1.

[0044] Example 5

[0045] A pitaya orchard herbicide composition is prepared from the following components: 500g of glufosinate ammonium salt, 10g of fluazifop-ammonium, 160g of seaweed iodine salt, 20g of polyglutamic acid, and 100kg of water; the preparation method is the same as that of Example 1.

[0046] Example 6

[0047] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 240 g of seaweed iodine salt, 30 g of polyglutamic acid, and 100 kg of water; the preparation method is the same as that of Example 1.

[0048] Example 7

[0049] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 300ml of Hsinchu edible acid, 100g of seaweed iodized salt, 20g of polyglutamic acid, and 100kg of water; the preparation method is the same as that of Example 1.

[0050] Example 8

[0051] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 200 g of seaweed iodized salt, 20 g of polyglutamic acid, and 100 kg of water; the preparation method is the same as that of Example 1.

[0052] Example 9

[0053] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodine salt, 20 g of polyglutamic acid, and 100 kg of water. The preparation method is the same as that of Example 1.

[0054] Example 10

[0055] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium salt, 10 g of fluazifop-ammonium, 400 ml of Hsinchu edible acid, 20 g of polyglutamic acid, and 100 kg of water; the preparation method is the same as that of Example 1.

[0056] Example 11

[0057] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, and 100kg of water. The preparation method is as follows: the pH value is adjusted to 9.7 based on Example 1.

[0058] Example 12

[0059] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodine salt, and 100kg of water. The preparation method is as follows: the pH value is adjusted to 4.7 based on Example 1.

[0060] Example 13

[0061] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodine salt, and 100kg of water. The preparation method is as follows: the pH value is adjusted to 7.7 based on Example 1.

[0062] Example 14

[0063] A pitaya orchard herbicide composition is prepared from the following components: 500g of glufosinate ammonium, 10g of fluazifop-ammonium, 200ml of acetic acid solution, 100g of seaweed iodine salt, 20g of polyglutamic acid, and 100kg of water. The above raw materials are weighed in sequence, 3000ml of water is measured and added to a container, and the weighed raw materials are added to the water in sequence and proportion to dissolve, stirring and dissolving with a stirring rod while adding. After stirring for 4 minutes, a pre-dissolved solution is obtained, and the remaining water is continuously added to the pre-dissolved solution to dilute and fix the volume to obtain a mixed solution. The pH value of the mixed solution is adjusted to 11.8 using NaOH with a mass concentration of 30%, thereby obtaining the pitaya orchard herbicide composition. The acetic acid solution was prepared as follows: 30 g of analytically pure anhydrous acetic acid was weighed into a 100 ml beaker, purified water was added to dissolve the anhydrous acetic acid, and water was added until the volume reached 80 ml. After cooling to room temperature, the solution was added to a 100 ml volumetric flask to obtain a 30 g / 100 ml (30%) acetic acid solution.

[0064] Example 15

[0065] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, 0.5g of sodium silicate, and 100kg of water. The preparation method is as follows: based on Example 1, 30% sodium hydroxide is used to adjust the pH value to 10.6.

[0066] Example 16

[0067] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, 1g of sodium silicate, and 100kg of water. The preparation method is the same as that of Example 1, and the pH value is adjusted to 11.8 using 30% sodium hydroxide.

[0068] Example 17

[0069] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, 1.5g of sodium silicate, and 100kg of water. The preparation method is as follows: based on Example 1, 30% of sodium hydroxide is used to adjust the pH value to 12.1.

[0070] Example 18

[0071] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodine salt, 0.5 g of polyvinyl alcohol, and 100 kg of water. The preparation method is the same as that of Example 1.

[0072] Example 19

[0073] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodized salt, 1 g of polyvinyl alcohol, and 100 kg of water. The preparation method is the same as that of Example 1.

[0074] Example 20

[0075] A pitaya orchard herbicide composition is prepared from the following components: 500 g of refined glufosinate ammonium salt, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodized salt, 1.5 g of polyvinyl alcohol, and 100 kg of water. The preparation method is the same as that of Example 1.

[0076] Example 21

[0077] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodine salt, 0.5 g of polydimethylsiloxane, and 100 kg of water. The preparation method is the same as that of Example 1.

[0078] Example 22

[0079] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodine salt, 1 g of polydimethylsiloxane, and 100 kg of water. The preparation method is the same as that of Example 1.

[0080] Example 23

[0081] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodine salt, 1.5 g of polydimethylsiloxane, and 100 kg of water. The preparation method is the same as that of Example 1.

[0082] Example 24

[0083] A method for preparing a pitaya orchard herbicide composition comprises the following steps: weighing the following raw materials in sequence: 400g of refined glufosinate ammonium salt, 15g of fluazifop-ammonium propargyl, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, 10g of polyglutamic acid, and 100kg of water; adding the weighed raw materials into water in sequence and in proportion to dissolve them to obtain a mixed solution; and adjusting the pH value of the mixed solution to 9 using NaOH with a mass concentration of 30%.

[0084] Example 25

[0085] A method for preparing a pitaya orchard herbicide composition comprises the following steps: weighing the following raw materials in sequence: 600 g of refined glufosinate ammonium salt, 8 g of fluazifop-ammonium propargyl, 300 mL of Hsinchu edible acid, 50 g of seaweed iodine salt, 20 g of polyglutamic acid, and 100 kg of water; adding the weighed raw materials into water in sequence and in proportion to dissolve them to obtain a mixed solution; and adjusting the pH value of the mixed solution to 12 using NaOH with a mass concentration of 30%.

[0086] Comparative Example 1

[0087] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, and 100kg of water. The refined glufosinate ammonium salt and fluazifop-ammonium are sequentially added into water and uniformly dissolved, and the pH value of the mixed solution is adjusted to 11.8 using NaOH with a mass concentration of 30%.

[0088] Comparative Example 2

[0089] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 50g of seaweed iodized salt, and 100kg of water. The refined glufosinate ammonium salt, fluazifop-ammonium, Hsinchu edible acid, and seaweed iodized salt are sequentially added into water and uniformly dissolved, and the pH value of the mixed solution is adjusted to 11.8 using NaOH with a mass concentration of 30%.

[0090] Comparative Example 3

[0091] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 10g of polyglutamic acid, and 100kg of water. The refined glufosinate ammonium salt, fluazifop-ammonium, and polyglutamic acid are sequentially added into water and uniformly dissolved, and the pH value of the mixed solution is adjusted to 11.8 using NaOH with a mass concentration of 30%.

[0092] Comparative Example 4

[0093] A pitaya orchard herbicide composition is prepared from the following components: 500g of glufosinate ammonium salt, 10g of fluazifop-ammonium, 200ml of Hsinchu edible acid, 100g of sodium iodide, 20g of polyglutamic acid, and 100kg of water; the preparation method is the same as that of Example 1.

[0094] Comparative Example 5

[0095] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 300g of seaweed iodine salt, 1g of sodium silicate, and 100kg of water. The preparation method is as follows: based on Example 1, 30% sodium hydroxide is used to adjust the pH value to 11.8.

[0096] Comparative Example 6

[0097] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium, 10 g of fluazifop-ammonium, 300 g of seaweed iodine salt, 0.5 g of polyvinyl alcohol, and 100 kg of water. The preparation method is the same as that of Example 1.

[0098] Comparative Example 7

[0099] A pitaya orchard herbicide composition is prepared from the following components: 500 g of glufosinate ammonium salt, 10 g of fluazifop-ammonium, 300 g of seaweed iodine salt, 0.5 g of polydimethylsiloxane, and 100 kg of water. The preparation method is the same as that of Example 1.

[0100] Comparative Example 8

[0101] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, 0.5g of sodium silicate, and 100kg of water. The preparation method is as follows: the pH value is adjusted to 4.7 based on Example 1.

[0102] Comparative Example 9

[0103] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, 1g of sodium silicate, and 100kg of water. The preparation method is as follows: the pH value is adjusted to 7.7 based on Example 1.

[0104] Comparative Example 10

[0105] A pitaya orchard herbicide composition is prepared from the following components: 500g of refined glufosinate ammonium salt, 10g of fluazifop-ammonium, 100ml of Hsinchu edible acid, 300g of seaweed iodized salt, 1.5g of sodium silicate, and 100kg of water. The preparation method is as follows: the pH value is adjusted to 8.5 based on Example 1.

[0106] Comparative Example 11

[0107] A pitaya orchard herbicide composition is prepared from the following components: 500 g of refined glufosinate ammonium salt, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodized salt, and 100 kg of water; the preparation method is the same as that of Example 1.

[0108] Comparative Example 12

[0109] A pitaya orchard herbicide composition is prepared from the following components: 500 g of refined glufosinate ammonium salt, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodized salt, and 100 kg of water. The preparation method is the same as that of Example 1.

[0110] Comparative Example 13

[0111] A pitaya orchard herbicide composition is prepared from the following components: 500 g of refined glufosinate ammonium salt, 10 g of fluazifop-ammonium, 100 ml of Hsinchu edible acid, 300 g of seaweed iodized salt, and 100 kg of water. The preparation method is the same as that of Example 1.

[0112] In order to verify the technical effect of the herbicide composition of the present invention, the present invention conducted a field test 1, which is as follows:

[0113] Each test was repeated three times. A 1m*1m test area was selected for each test. Weed seeds were sown in the test area. Weeds (including annual grasses, grasses, broadleaf grasses, sedges, ryegrass, and other common weeds in pitaya orchards) were cultivated for 4-5 days until the grass was 20-30 cm long. The weeds were then sprayed with the herbicide composition at a spray rate of 200 ml / m 2 The herbicide combination was sprayed on a sunny day. Data were collected on the day of spraying and 10 days after spraying to observe weed mortality. Mortality = (original weed count - remaining weed count) / original weed count * 100%. The results for each test group are shown in Table 1 below.

[0114] Table 1

[0115]

[0116]

[0117] As shown in Table 1, a comparison of the data of Comparative Example 1 and Comparative Example 2 shows that the synergist of the present invention can significantly improve the weed control rate; a comparison of the data of Comparative Example 1 and Comparative Example 3 shows that the waterproof backing film has an inhibitory effect on the weed control activity; and a comparison of the data of Example 1 and Comparative Example 2 shows that after the addition of the synergist of the present invention, the waterproof backing film does not affect the weed control activity.

[0118] From the comparison of the data of Examples 1, 2, and 3 with those of Examples 4, 5, and 6, it can be seen that Hsinchu edible acid can significantly reduce the inhibitory effect of polyglutamic acid on the herbicidal activity of the waterproof backing film. The use of Hsinchu edible acid + polyglutamic acid as a composite adjuvant allows the waterproof backing film to be used normally, ultimately achieving the effect of not only improving the herbicidal rate but also being able to be used in light rain weather.

[0119] From the comparison of the data of Example 2, Example 7, Example 8 and Example 9, it can be seen that when the ratio of Hsinchu edible acid: seaweed iodized salt in the synergist is 100 mL:300 g, the control effect is the best.

[0120] From the comparison of the data of Example 2 and Comparative Example 3, it can be seen that the addition of a synergist can significantly improve the herbicide rate; from the comparison of the data of Example 2, Example 5 and Example 10, it can be seen that the herbicide rate of the synergistic single agent is significantly reduced, and Example 5 is particularly obvious, because Hsinchu edible acid can significantly reduce the inhibition of polyglutamic acid on the herbicidal activity; from the comparison of Comparative Example 3, Example 5 and Example 2, it can be seen that without the addition of Hsinchu edible acid, the effect of seaweed iodine salt is obviously inferior to that of the composite synergist. Obviously, the two need to be used in combination to achieve a good technical effect.

[0121] Comparison of the data in Example 2 and Example 14 shows that the herbicidal synergy of Hsinchu edible acid is significantly better than that of acetic acid solution. This may be because Hsinchu edible acid contains other ingredients that can reduce the inhibitory effect of polyglutamic acid on herbicidal activity.

[0122] From the comparison of the data of Comparative Example 4 and Example 2, it can be seen that the weed control effect of sodium iodide is significantly reduced compared with that of seaweed iodized salt, which may be because seaweed iodized salt contains other special ingredients that can improve the weed control rate.

[0123] From the data comparison between Comparative Example 5 and Example 16, the data comparison between Comparative Example 6 and Example 18, and the data comparison between Comparative Example 7 and Example 21, it can be seen that Hsinchu edible acid can reduce the inhibition of the herbicidal activity of the waterproof backing film sodium silicate, polyvinyl alcohol, and polydimethylsiloxane.

[0124] Examples 11-13 did not add a waterproof backing film and the pH was set to 9.7, 4.7, and 7.7. Comparative Examples 8-10 added a waterproof film and the pH was set to 4.7, 7.7, and 8.5. Figure 1 It can be seen that the herbicide rate of Comparative Examples 8-10 is significantly lower than that of Examples 11-13. Examples 15-17 also added a waterproof film and set the pH to 10.6, 11.8, and 12.1. Figure 2 It can be seen that the herbicide rates of Examples 15-17 are significantly higher than those of Comparative Examples 8-10, indicating that pH needs to be adjusted after adding the waterproof film. Figure 3 As shown, when no waterproof backing film is added, the pH can be set to a low pH range, such as 4.7-9.7; after adding the waterproof backing film, the pH value needs to be adjusted to above 9, otherwise the weed control effect will be significantly reduced.

[0125] In order to verify the technical effect of the waterproof backing film of the present invention, the present invention conducted a second field test, which is as follows:

[0126] Each test was repeated three times. A 1m*1m test area was selected for each test. Weed seeds were sown in the test area. Weeds (including annual grasses, grasses, broadleaf grasses, sedges, ryegrass, and other common weeds in pitaya orchards) were cultivated for 4-5 days until the grass was 20-30 cm long. The weeds were then sprayed with the herbicide composition at a spray rate of 200 ml / m 2 Three hours after spraying, water was sprayed in the field using a watering can to simulate light rain (light rain simulation: approximately 1 mm / 24 hours). Ten days after spraying the herbicide combination, data were collected to observe weed mortality. Mortality = (original weed count - remaining weed count) / original weed count * 100%. The results for each test group are shown in Table 2 below.

[0127] Table 2

[0128]

[0129] Examples 16, 18, and 21 all added a waterproof backing film and were able to maintain a good weed control rate in the light rain test. Comparative Examples 11, 12, and 13 did not add a waterproof backing film based on Examples 16, 18, and 21. As can be seen from Table 2, the present invention can indeed ensure that the herbicide can be used normally in light rain weather by adding a waterproof backing film.

[0130] In order to verify whether the herbicide of the present invention has an effect on the growth of pitaya, the present invention also conducted a field test three, which is as follows:

[0131] The test was conducted at the pitaya planting test base of the Baise Agricultural Science Research Institute. The far-branched big red pitaya was used as the test variety. When the weeds in the planting test base grew to 20-30 cm, the herbicide composition of Examples 1-3 was sprayed for weed control at a spraying rate of 200 mL / m 2 , with manual weeding as the control group, 1 mu of land per group, and other field management was the same. From planting to the first ripening of pitaya, the fruits were picked and the yield statistics and soluble solids analysis were carried out. The results are shown in Table 3.

[0132] Table 3

[0133]

[0134] As can be seen from the data in Table 3, there is no significant difference in the average yield per plant and the soluble solids of the fruit between Examples 1-3 and the control group, indicating that the herbicide composition of the present invention has no effect on the yield and quality of pitaya.

[0135] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A pitaya orchard herbicide composition, characterized in that, The invention comprises an active component and a synergist, wherein the active components are glufosinate ammonium and fluazifop-ammonium, and the synergist is composed of an acidic solution and seaweed iodine salt. The acidic solution is Hsinchu edible acid or an acetic acid aqueous solution. The pitaya orchard herbicide composition uses water as a solvent, and contains the following components by weight per 100 kg of water: 400-600 g of glufosinate ammonium, 8-15 g of fluazifop-ammonium, 100-300 mL of acidic solution, 50-300 g of seaweed iodine salt, and 0-30 g of a waterproof film. The total acid content of the acidic solution is 30 g / mL. The waterproof film is any one or any combination of polyglutamic acid, sodium silicate, polyvinyl alcohol, and polydimethylsiloxane. The preparation method of the pitaya orchard herbicide composition comprises the following steps: When the pitaya orchard herbicide composition does not include a waterproof film, glufosinate ammonium, fluazifop-ammonium, and a synergist are sequentially added to water, stirred and dissolved while adding to obtain a mixed solution, and then the pH of the mixed solution is adjusted to 4.5-12 using NaOH to obtain a pitaya orchard herbicide composition; When the pitaya orchard herbicide composition contains a waterproof film, glufosinate ammonium, fluazifop-butyl, a synergist, and a waterproof film are sequentially added to water while stirring to dissolve to obtain a mixed solution, and then NaOH is used to adjust the pH of the mixed solution to 9-12 to obtain the pitaya orchard herbicide composition.

2. A pitaya orchard herbicide composition according to claim 1, characterized in that: The synergist consists of Hsinchu edible acid and seaweed iodized salt.

3. The method for preparing the pitaya orchard herbicide composition according to claim 1 or 2, wherein: The steps include: When the pitaya orchard herbicide composition does not include a waterproof film, glufosinate ammonium, fluazifop-ammonium, and a synergist are sequentially added to water, stirred and dissolved while adding to obtain a mixed solution, and then the pH of the mixed solution is adjusted to 4.5-12 using NaOH to obtain a pitaya orchard herbicide composition; When the pitaya orchard herbicide composition contains a waterproof film, glufosinate ammonium, fluazifop-butyl, a synergist, and a waterproof film are sequentially added to water while stirring to dissolve to obtain a mixed solution, and then NaOH is used to adjust the pH of the mixed solution to 9-12 to obtain the pitaya orchard herbicide composition.

4. The method for using the pitaya orchard herbicide composition according to claim 1 or 2, wherein: The process includes the following steps: when the weeds in the dragon fruit orchard grow to 20-30 cm, spray the entire dragon fruit orchard at a rate of 180-220 mL / m 2 , spray on sunny days or light rainy days; the temperature on sunny days is 20-30℃, and the air humidity is 30-60%; the light rainy days refer to rainfall <1mm / 24h.

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