阅读说明：本技术 一种大豆田苗后复方除草剂 (Compound herbicide for soybean field after seedling emergence ) 是由 邱付中 李会丽 于 2021-01-08 设计创作，主要内容包括：本发明公开了一种大豆田苗后复方除草剂,所述复方除草剂的有效成分为精噁唑禾草灵、禾草丹,其中精噁唑禾草灵、禾草丹的质量比为1～10:10～50。本发明提供的大豆田苗后复方除草剂,效果显著,与精噁唑禾草灵、禾草丹单剂相比,用量低,成本低,扩大杀草谱,降低残留,对田间单子叶杂草的防效、鲜重防效、综合鲜重防效均有明显提高,对田间作物安全,速效性明显。本发明是能够用于大豆田防除狗尾草、马唐、稗草等抗性杂草的茎叶处理的除草剂,一次施药即能防除作物整个生育期内的杂草,对环境友善,无残留,对下茬作物高度安全。(The invention discloses a compound herbicide for soybean field after seedling emergence, which comprises the effective components of fenoxaprop-p-ethyl and bentazon, wherein the mass ratio of the fenoxaprop-p-ethyl to the bentazon is 1-10: 10-50. The compound herbicide after seedling in soybean field provided by the invention has obvious effect, has low dosage and low cost compared with the single agents of fenoxaprop-p-ethyl and thiobencarb, expands the weed control spectrum, reduces the residue, obviously improves the control effect on monocotyledonous weeds in field, the fresh weight control effect and the comprehensive fresh weight control effect, is safe to field crops and has obvious quick-acting property. The herbicide can be used for controlling stem and leaf treatment of resistant weeds such as green bristlegrass herb, large crabgrass, barnyard grass and the like in a soybean field, can control the weeds in the whole growth period of crops by once application, is environment-friendly, has no residue, and is highly safe for next-stubble crops.)

1. The compound herbicide for the post-emergence of the soybean field is characterized in that: the effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 1-10: 10-50.

2. The post-emergence compound herbicide for soybean fields according to claim 1, which is characterized in that: the mass ratio of fenoxaprop-p-ethyl to bentazone is 2-10: 10-40.

3. The post-emergence compound herbicide for soybean fields according to claim 1, which is characterized in that: the mass ratio of fenoxaprop-p-ethyl to bentazone is 6: 25.

4. The post-emergence compound herbicide for soybean fields according to any one of claims 1 to 3, which is characterized in that: the sum of the weight of the fenoxaprop-p-ethyl and the mass of the bentazone accounts for 20-80% of the total weight of the herbicide.

5. The post-emergence compound herbicide for soybean fields according to any one of claims 1 to 3, which is characterized in that: the dosage forms of the compound herbicide comprise dispersible oil suspending agent, wettable powder, water dispersible granules, emulsion in water, suspending agent, suspoemulsion, water aqua and missible oil.

Technical Field

The invention belongs to the technical field of herbicides, and particularly relates to a compound herbicide for soybean field after seedling emergence.

Background

fenoxaprop-P-ethyl belongs to heterocyclic oxy phenoxy propionic acid herbicides, and mainly inhibits the synthesis of fatty acid by inhibiting acetyl coenzyme A carboxylase which is a key enzyme for fatty acid synthesis. The agent is absorbed and transmitted to the growth points of meristems and roots through stems and leaves, has quick action, stops growing 2-3 days after application, changes the heart leaves from green to purple in 5-6 days, changes the meristems into brown, gradually withers and dies the leaves, and is a stem and leaf treating agent with extremely strong selectivity. The composition is mainly used for preventing and killing wild oat, alopecurus, green bristlegrass herb, oat, ryegrass, bluegrass, barnyard grass, self-growing corn, crab grass and the like.

The bentazone is a systemic conduction selective herbicide, is mainly absorbed by the roots and the buds of weeds, is used as a soil treatment agent, is safe to rice, and has excellent control effect on barnyard grass. The gramineae is suitable for preventing and killing barnyard grass, felty cattle, sedge, moleplant seed, crabgrass, cricket grass, green bristlegrass, ground sedge, purslane, aloesgrass, aloesbill, etc. in rice, wheat, soybean, peanut, corn, vegetable field and orchard, etc.

The green bristlegrass herb, the large crabgrass, the barnyard grass and the like grow vigorously in the soybean field after seedling emergence, the two herbicides are used as single agents, the dosage is large, the cost is high, the environment is not friendly, and the weeding effect in the soybean field after seedling emergence is poor.

Disclosure of Invention

The invention aims to provide a compound herbicide after soybean field seedling, which has low dosage, low cost and safety to field crops.

In order to achieve the purpose, the invention adopts the technical scheme that:

the effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 1-10: 10-50.

Further, the mass ratio of the fenoxaprop-p-ethyl to the thiodan is 2-10: 10-40.

Further, the mass ratio of the fenoxaprop-p-ethyl to the thiodan is 6: 25.

Further, the sum of the fenoxaprop-p-ethyl and the bentazone accounts for 20-80% of the total weight of the herbicide.

Furthermore, the dosage form of the compound herbicide comprises dispersible oil suspending agent, wettable powder, water dispersible granules, emulsion in water, suspending agent, suspoemulsion, water aqua, missible oil and other common pesticide dosage forms.

The invention has the advantages that:

the compound herbicide after seedling in soybean field provided by the invention has obvious effect, has low dosage and low cost compared with the single agents of fenoxaprop-p-ethyl and thiobencarb, expands the weed control spectrum, reduces the residue, obviously improves the control effect on monocotyledonous weeds in field, the fresh weight control effect and the comprehensive fresh weight control effect, is safe to field crops and has obvious quick-acting property. The herbicide can be used for controlling stem and leaf treatment of resistant weeds such as green bristlegrass herb, large crabgrass, barnyard grass and the like in a soybean field, can control the weeds in the whole growth period of crops by once application, is environment-friendly, has no residue, and is highly safe for next-stubble crops.

Detailed Description

Example 1

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 1:10, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 20% of the total weight of the herbicide.

The compound herbicide is in the form of dispersible oil suspending agent, 2kg of fenoxaprop-p-ethyl, 20kg of thiobencarb, 8kg of polyoxyalkylene, 9kg of castor oil polyoxyethylene ether, 2kg of dodecyl benzene sulfonate and corn oil are weighed to be supplemented to 100kg, and the compound herbicide dispersible oil suspending agent is obtained by fully mixing, blending, ball-milling, crushing, adjusting and packaging.

Example 2

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 2:25, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 28% of the total weight of the herbicide.

The compound herbicide is in the form of dispersible granules, 3kg of fenoxaprop-p-ethyl, 25kg of thiobencarb, 6kg of naphthalenesulfonate formaldehyde condensate (D-425), 2kg of mixture (EFW) of alkyl naphthalenesulfonate and an anionic wetting agent, 5kg of ammonium sulfate, 1kg of polyethylene glycol and kaolin are weighed and added to 100kg, and the compound herbicide dispersible granules are obtained through full mixing, airflow crushing, mixing, granulation, drying and screening.

Example 3

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 6:25, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 31 percent of the total weight of the herbicide.

The compound herbicide is in the form of a suspending agent, and 6kg of fenoxaprop-p-ethyl, 25kg of bentazone, 15% of emulsifier 1601#, 5% of wetting agent LS, 4kg of dispersing agent SOPA-270, 3kg of bentonite, 0.1kg of xanthan gum, 0.4kg of defoaming agent, 5% of glycerol and deionized water are weighed up to 100% to obtain the compound herbicide suspending agent.

Example 4

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 8:30, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 38% of the total weight of the herbicide.

The compound herbicide is in the form of wettable powder, 8kg of fenoxaprop-p-ethyl, 30kg of bentazone, 4kg of dispersing agent NNO, 3kg of wetting agent K12, 4kg of white carbon black and light calcium carbonate are weighed to be supplemented to 100kg, and the compound herbicide wettable powder is obtained by full mixing, airflow crushing and mixing.

Example 5

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 10:40, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 50% of the total weight of the herbicide.

The formulation of the compound herbicide is missible oil, 10kg of fenoxaprop-p-ethyl, 40kg of thiodan, 4kg of condensed milk No. 33, 6kg of dodecyl benzene sulfonate and xylene are weighed up to 100kg to obtain the compound herbicide missible oil.

Example 6

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 10:50, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 60% of the total weight of the herbicide.

The formulation of the compound herbicide is a suspending agent, 10kg of fenoxaprop-p-ethyl, 50kg of bentazone, 15% of emulsifier 1601#, 5% of wetting agent LS, 4kg of dispersing agent SOPA-270, 3kg of bentonite, 0.1kg of xanthan gum, 0.4kg of defoaming agent, 5% of glycerol and deionized water are weighed and supplemented to 100%, and the compound herbicide suspending agent is obtained.

Example 7

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 3:11, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 70% of the total weight of the herbicide.

The compound herbicide is in the form of wettable powder, 15kg of fenoxaprop-p-ethyl, 55kg of thiodan, 4kg of dispersing agent NNO, 3kg of wetting agent K12, 4kg of white carbon black and light calcium carbonate are weighed to be supplemented to 100kg, and the compound herbicide wettable powder is obtained by full mixing, airflow crushing and mixing.

Example 8

The effective components of the compound herbicide are fenoxaprop-p-ethyl and thiobencarb, wherein the mass ratio of the fenoxaprop-p-ethyl to the thiobencarb is 3:13, and the sum of the fenoxaprop-p-ethyl and the thiobencarb accounts for 80% of the total weight of the herbicide.

The compound herbicide is prepared by weighing 15kg of fenoxaprop-p-ethyl, 65kg of bentazone, 4kg of concentrated emulsion No. 33, 6kg of dodecyl benzene sulfonate and xylene to complement to 100 kg.

Indoor toxicity assay

The purpose of the test is as follows: under the greenhouse condition, a pot experiment method is adopted to research the weeding effect of the binary combination of fenoxaprop-p-ethyl and benthiocarb, and the co-toxicity coefficient method of the Sunweipei is adopted to evaluate the contact action type of the two in different proportions, thereby providing the experiment basis for the experiment.

The test conditions are as follows: the tested weeds, green bristlegrass, large crabgrass, barnyard grass and the like (seeds are harvested in the field in the last year, and the germination rate is over 85 percent).

The culture is carried out in a light culture room at the temperature of 10-25 ℃.

The application method comprises the following steps: and (4) treating stems and leaves of weeds in a seedling stage.

The test reagent is 95 percent fenoxaprop-p-ethyl original drug (research and development center of agro-chemical Limited liability company, Fengle, Anhui); 97% of thiobencarb technical (south Tongtai Hei chemical Co., Ltd.).

Weighing a certain amount of the raw medicine by a balance, and diluting the required concentration.

The fenoxaprop-p-ethyl and the thiobencarb have combined action.

The fenoxaprop-p-ethyl, the single dose of the fenoxaprop-p-ethyl and 5 mixed formulations of the fenoxaprop-p-ethyl and the fenoxaprop-p-ethyl are respectively provided with 5 doses, blank controls are additionally arranged, and each test treatment is repeated for 4 times.

The treatment doses are detailed in table 1.

TABLE 1 test treatment and test level (effective ingredient dosage g/liter)

The best mixture of the fenoxaprop-p-ethyl and the thiobencarb has combined action with the fenoxaprop-p-ethyl.

The mixed preparation of fenoxaprop-p-ethyl and bentazone, the single preparation of fenoxaprop-p-ethyl and 5 mixed preparations are respectively provided with 5 dosages, blank controls are additionally arranged, and each test treatment is repeated for 4 times.

Method of administering a drug

The method is used for treating stems and leaves after field seedling, adopts an electric sprayer, is provided with a fan-shaped spray head, simulates field spraying, and has the water adding amount of 30 kilograms per mu.

Time and frequency of application: the test is carried out by spraying the medicament on 2018, 9 and 22 days, and the medicament is applied for 1 time.

After the drug is applied, the poisoning condition is recorded in detail, and the fresh weight is measured 20 days after the drug is applied and compared with the control treatment to calculate the fresh weight control effect.

Combined action assay method

Test results the combined action type after the mixture is evaluated by the co-toxicity coefficient method of the Sun Yunpei.

And calculating the actual virulence index, the mixed agent theoretical virulence index and the cotoxicity coefficient according to the SUN, Y-P (Sun cloud Peel) method. And solving a regression equation by taking the concentration logarithm as X and the weed control probability value as Y.

Actual toxicity index (standard dose ED)₅₀ED of mixed agent₅₀×100

Theoretical virulence index ═ Σ (virulence index of test agent x percentage of active ingredient in the mixture)

The observed virulence index (ATI) ═ standard medicament ED 50/test medicament ED50 x 100

The co-toxicity coefficient is the actual toxicity index/theoretical toxicity index of the mixed preparation multiplied by 100

Theoretical virulence index (TTI) ═ A agent virulence index x percentage of A in the mixture + B agent virulence index x percentage of B in the mixture

In the test, the thiobencarb is a standard medicament.

And (3) judging standard: the co-toxicity coefficient is less than 80, the antagonism is obtained, the additive effect is obtained between 80 and 120, and the synergism is obtained when the co-toxicity coefficient is more than 120.

The combined effect of fenoxaprop-p-ethyl and thiobencarb is shown in table 2 below.

TABLE 2 mixing of fenoxaprop-p-ethyl and diclofop-methyl, fresh weight effect on weeds 20 days after application

Fresh weights are the mean of quadruplicate replicates in the table.

TABLE 3 indoor toxicity and combined effect of two drugs on Equisetum arvense and brome

It can be seen from the above table that most of the cotoxicity coefficients of treatments (C), (D), (E) and (F) are 150.24, 162.99, 198.64 and 143.08 respectively greater than 120, and have synergistic effect, and (G)117.62 has additive effect, wherein the cotoxicity coefficient of (E) is the largest and is 198.64, and significant synergistic effect is achieved.

The test conclusion shows that the fenoxaprop-p-ethyl and the thiodan are mixed properly according to the proportion of 6:25, and have obvious synergistic effect on annual monocotyledonous weeds.

Field efficacy test 1

The application site is as follows: the Shanza Ganya of Shancai county, Huang Zhu Town, Henan province, and the previous crop are wheat fields. The fertility of the test soil is uniform and consistent, and the terrain is flat. Slightly viscous soil, moderate fertility and moderate humidity. Sowing Wandou 18, wherein annual monocotyledonous weeds in the field mainly comprise green bristlegrass, crab grass, barnyard grass and the like which are uniformly distributed.

The application time is as follows: the application is carried out in the 2-3 compound leaf stage of soybean, and the specific time is 6 months and 20 afternoons in 2018.

The application conditions are as follows: the temperature is 29-32 ℃ on sunny days on the day of drug application.

The dosage and the mode of administration are as follows: the application amount is 100ml/667m²The liquid medicine is prepared by a two-step dilution method. The pesticide instrument adopts an electric knapsack sprayer which is beneficial to agriculture, a fan-shaped spray head is arranged, the manual uniform spraying is carried out, and the water consumption is 30kg/667m²。

Test groups: the method comprises the following steps of (1) dividing the test group into an oil suspending agent test group, a water dispersible granule test group and a water dispersible granule test group; wherein, the dispersible oil suspending agent containing 22% fenoxaprop-p-ethyl and prepared in the embodiment 1 of the invention is sprayed in the oil suspending agent test group according to the dosage of 100 ml/mu, the dispersible oil suspending agent test group contains 10% fenoxaprop-p-ethyl 50 ml/mu, and the test group contains 50% thion-ethyl 200 ml/mu. Blank control group: spraying clear water according to the same dosage.

The test method comprises the following steps: each test group and blank control group are repeated for 4 times, and each test group and blank control group respectively occupy 35m of test field cell area²And the cells are randomly arranged. Before drug application, randomly selecting 4 points before drug application in the cells of each test group and blank control group; applying the herbicide for 30d and 45d to investigate the withered and dead number of weeds, calculating the plant control effect and fresh weight control effect by 45d, and respectively recording the number of weeds (plants/m) in each test group and blank control group in each plot²) Calculation of weed controlEffect (%); after 45 days of pesticide application, the weeds are pulled out and the fresh weight (g/m) is weighed²) And calculating the fresh weight control effect (%).

Control effect (%) (number of pre-drug weed plants-number of post-drug weed plants in treatment area)/number of pre-drug weed plants × 100.

Fresh weight control (%) (fresh weight of weeds in control area-fresh weight of weeds in treatment area)/fresh weight of weeds in control area x 100.

The herbicidal effect of the individual test groups is shown in table 4.

TABLE 4 herbicidal Effect of fenoxaprop-p-ethyl and diclofop-p-methyl in field efficacy test 1

As can be seen from the above table, after 30 days of pesticide application, the dispersible oil suspension containing 22% fenoxaprop-p-ethyl and thiodan prepared in example 1 of the invention has a control effect on green bristlegrass and crabgrass of more than 95%, the control effects on green bristlegrass and crabgrass containing 10% fenoxaprop-p-ethyl are respectively 78.8% and 84.6%, and the control effects on green bristlegrass and crabgrass containing 50% thiodan are 65.1% and 52.4%. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).

After 45 days of pesticide application, the dispersible oil suspension containing 22% fenoxaprop-p-ethyl and thiodan prepared in the embodiment 1 of the invention has the control effects on green bristlegrass and crabgrass of more than 95%, the control effects on green bristlegrass and crabgrass containing 10% fenoxaprop-p-ethyl are 81.8% and 87.2% respectively, and the control effects on green bristlegrass and crabgrass containing 50% thiodan are 68.3% and 57.1%. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).

After 45 days of pesticide application and after the removal of weeds, the fresh weight of the dispersible oil suspending agent containing 22 percent fenoxaprop-P-ethyl and thiodan prepared in the embodiment 1 of the invention is 100 percent of the fresh weight control effect on green bristlegrass and crab grass, the fresh weight control effect on green bristlegrass and crab grass containing 10 percent fenoxaprop-P-ethyl is more than 80 percent, and the fresh weight control effect on green bristlegrass and crab grass containing 50 percent thiodan is more than 55 percent.

The comprehensive test results show that compared with fenoxaprop-p-ethyl water dispersible granules and fenoxaprop-p-ethyl missible oil, the fenoxaprop-p-ethyl and fenoxaprop-p-ethyl dispersible oil suspending agent has improved control effect on field weeds and fresh weight control effect, and is safe for field crops.

Field efficacy test 2

The application site is as follows: henan province, WO 37118, City region of Meng Teao Zhen Dou, previous crop was wheat field. The fertility of the test soil is uniform and consistent, and the terrain is flat. Soil clay, moderate fertility and moderate humidity. PuDou 1802 is sowed, and the annual monocotyledonous weeds in the field are uniformly distributed, such as green bristlegrass, large crabgrass and the like.

The application time is as follows: the application is carried out in the 3-4 leaf stage of wheat, and the specific time is 11 months and 9 afternoons in 2018.

The application conditions are as follows: the temperature is 8-16 ℃ on sunny days when the medicine is applied.

The dosage and the mode of administration are as follows: the application amount is 100 ml/mu, and the liquid medicine is prepared by a two-step dilution method. The pesticide instrument adopts an electric knapsack sprayer which is beneficial to agriculture, a fan-shaped spray head is arranged, the manual uniform spraying is carried out, and the water consumption is 30kg/667m²。

Test groups: the test method comprises the following steps of (1) dividing the test group into a suspending agent test group, an emulsifiable concentrate test group and an emulsifiable concentrate test group; wherein, the suspending agent containing 31% fenoxaprop-p-ethyl and bentazon prepared in the embodiment 3 of the invention is sprayed in the suspending agent test group according to the dosage of 100 ml/mu, the missible oil test group contains 10% fenoxaprop-p-ethyl 50 ml/mu, and the test group contains 50% bentazon EC200 ml/mu. Blank control group: spraying clear water according to the same dosage.

The test method comprises the following steps: each test group and blank control group are repeated for 4 times, and each test group and blank control group respectively occupy a test field cell area of 75m²And the cells are randomly arranged. Before application, in each caseRandomly taking 4 points before medicine in the test group and the blank control group; applying the herbicide for 30d and 45d to investigate the withered and dead number of weeds, calculating the plant control effect and fresh weight control effect by 45d, and respectively recording the number of weeds (plants/m) in each test group and blank control group in each plot²) Calculating the weed control effect (%); after 45 days of pesticide application, the weeds are pulled out and the fresh weight (g/m) is weighed²) And calculating the fresh weight control effect (%).

Control effect (%) (number of pre-drug weed plants-number of post-drug weed plants in treatment area)/number of pre-drug weed plants × 100.

Fresh weight control (%) (fresh weight of weeds in control area-fresh weight of weeds in treatment area)/fresh weight of weeds in control area x 100.

The herbicidal effect of the individual test groups is shown in table 5.

TABLE 5 herbicidal Effect of fenoxaprop-p-ethyl and diclofop-p-methyl in field efficacy test 2

As can be seen from the above table, after 30 days of pesticide application, the 31% fenoxaprop-p-ethyl and thiodan suspension prepared in example 3 of the invention has a control effect on green bristlegrass and crabgrass of more than 95%, the control effects on green bristlegrass and crabgrass containing 10% fenoxaprop-p-ethyl are respectively 75.9% and 76.7%, and the control effects on green bristlegrass and crabgrass containing 50% thiodan are 53.6% and 52.4%. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).

After 45 days of pesticide application, the 31 percent fenoxaprop-p-ethyl and thiodan suspending agent prepared in the embodiment 3 of the invention has the control effect on green bristlegrass and crab grass of more than 95 percent, the control effects of the 10 percent fenoxaprop-p-ethyl on green bristlegrass and crab grass are respectively 81.5 percent and 86.0 percent, and the control effects of the 50 percent thiodan on green bristlegrass and crab grass are 57.1 percent and 54.8 percent. Compared with each single agent, the herbicide composition not only improves the control effect on weeds, but also expands the weed control spectrum, and has very obvious difference (P is less than 0.01).

After 45 days of pesticide application and after the weeds are pulled out, the fresh weight of the fenoxaprop-P-ethyl and the suspending agent prepared in the embodiment 3 is weighed, the control effect of the fenoxaprop-P-ethyl and the suspending agent on the fresh weight of the green bristlegrass and the crabgrass is 100%, the control effect of the fenoxaprop-P-ethyl containing 10% on the fresh weight of the green bristlegrass and the crabgrass is more than 85%, and the control effect of the thiodan-P-ethyl containing 50% on the fresh weight of the green bristlegrass and the crabgrass is more than 55%.

The results of the above tests show that compared with fenoxaprop-p-ethyl oil suspending agent and fenoxaprop-p-ethyl missible oil, the fenoxaprop-p-ethyl and fenoxaprop-p-ethyl suspending agent has improved control effect on field weeds and fresh weight control effect, and is safe for field crops.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.