Ground sealing herbicide for planting asarum heterotropoides and use method
The emulsifiable concentrate herbicide made by compounding solves the problem of serious weed damage in Asarum planting, achieves effective control of weeds in Asarum fields, ensures the emergence rate and yield of medicinal materials, and ensures weeding. agent safety and environmental protection.
Patent Information
- Application Number
- CN202411400059.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-01-21
AI Technical Summary
In the large-scale production of Asarum, especially in the first year of transplantation, weeds are seriously harmful, affecting the growth, yield and quality of medicinal materials, and the abuse of herbicides has led to a decrease in the yield and quality of medicinal materials.
Provided is a closed-field herbicide for asarum planting, which uses N-sec-butyl-4-tert-butyl-2,6-dinitroaniline and 2,6-dinitro-N,N-dipropyl- The compound of 4-trifluoromethylaniline forms an emulsifiable concentrate formulation for the control of monocotyledonous and annual broadleaf weeds.
This herbicide has excellent control effect on field weeds of Asarum, ensures the emergence rate of Asarum, has less impact on the above-ground parts, underground parts and yield of medicinal materials, is highly safe, and avoids the risk of weeds and Asarum asarum has an advantage in the competition for light and nutrients.
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pesticides, and in particular to a ground-covering herbicide for planting Asarum truncatum and a use method thereof. Background Art
[0002] Asarum heterotropoides var.mandshuricum, also known as Wanbingcao, Xishen, Yandaiguohua, and Northeast Asarum, is a perennial herbaceous plant of the genus Asarum in the family Aristolochiaceae. It has the effects of dispelling wind, dispersing cold, relieving pain, opening the orifices, warming the lungs and eliminating fluid, and is mainly used to treat headaches, toothaches, colds, nasal congestion, rheumatic pain, phlegm, asthma and cough, etc. It is a precious Chinese medicinal material; at the same time, volatile oil can be extracted from the root, which is also an important raw material for chemical industries such as spices and essential oils. Therefore, the demand for Asarum heterotropoides has been increasing year by year. It is named because its root is fine and spicy, and it is a local medicinal material in Liaoning, China.
[0003] In the large-scale production of Liao Xixin, especially in the first year of transplanting, weeds are very serious. Weed damage directly affects the growth of medicinal materials, resulting in reduced yields and quality, reduced medicinal material income, and a dampening of the enthusiasm of farmers to plant medicinal materials; in addition, weed damage can easily cause large-scale outbreaks of diseases and insect pests, and the process of disease prevention and control often leads to problems such as pesticide residues and environmental pollution.
[0004] At present, chemical weed control is widely used in agricultural planting. Various types of herbicides have been developed according to the different mechanisms of action, methods of use, control targets and application range of crops. Among them, soil sealers, also called pre-emergence sealers, are applied to the soil and absorb through the roots, bud sheaths or hypocotyls of weeds to exert a weed control effect, which can control unemerged weeds. Because of its low water solubility and low mobility, it is quickly adsorbed in the 0-3cm topsoil layer after application, does not penetrate into the lower soil, has low pollution and high safety, and is widely used in agricultural production. However, due to the cultivation characteristics and quality requirements of Chinese medicinal materials, the safety requirements for herbicides are relatively high. Therefore, there are fewer types of herbicides suitable for use, and related research is relatively rare; at the same time, the abuse of herbicides in the cultivation of Chinese medicinal materials is common, and years of spraying have caused a decline in the yield and quality of Chinese medicinal materials. Summary of the invention
[0005] The present invention aims to provide a herbicide for use in planting Asarum truncatum and a method of use thereof, so as to solve the problems raised in the above-mentioned background technology.
[0006] In order to achieve the above object, the present invention provides the following technical solutions:
[0007] A herbicide for planting Asarum liaorei, the herbicide is a compound of N-sec-butyl-4-tert-butyl-2,6-dinitroaniline and 2,6-dinitro-N,N-dipropyl-4-trifluoromethylaniline, the weight ratio of which is 1:1.997; the N-sec-butyl-4-tert-butyl-2,6-dinitroaniline can be 48% of trifluralin, and the 2,6-dinitro-N,N-dipropyl-4-trifluoromethylaniline can be 480g / L of trifluralin.
[0008] Preferably, the herbicide is in the form of an emulsifiable concentrate.
[0009] Preferably, the herbicide is used to control monocotyledonous weeds and annual broadleaf weeds.
[0010] Preferably, trifluralin 648 g a.i. / hm is selected 2 and 48% butralin 1294ga.i. / hm 2 For compound application.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] The herbicide for planting Asarum truncatum provided by the present invention has excellent weed control effect on Asarum truncatum planting fields, can ensure the emergence rate of Asarum truncatum, has little effect on the above-ground part, underground part and yield of Asarum truncatum, and has high safety; it prevents weeds from competing with the new young leaves of Asarum truncatum for light in the above-ground part, and avoids the competition between the two for nutrients in the underground part, thus creating favorable conditions for the growth of Asarum truncatum. DETAILED DESCRIPTION
[0013] The present invention is further described in detail below in conjunction with the embodiments:
[0014] The specific implementation process is as follows:
[0015] A herbicide for planting Asarum liaorei, the herbicide is a compound of N-sec-butyl-4-tert-butyl-2,6-dinitroaniline and 2,6-dinitro-N,N-dipropyl-4-trifluoromethylaniline, the N-sec-butyl-4-tert-butyl-2,6-dinitroaniline can be 48% of trifluralin, and the 2,6-dinitro-N,N-dipropyl-4-trifluoromethylaniline can be 480g / L of trifluralin.
[0016] Herbicides are used to control monocotyledonous weeds and annual broadleaf weeds, such as barnyard grass, wood thrush, crabgrass, foxtail grass, cricket grass, bluegrass, lycopodii, goosegrass, alopecuroides, wild oats, purslane, polygonum, and Polygonum multiflorum.
[0017] When using, choose trifluralin 648ga.i. / hm 2 and 48% butralin 1294ga.i. / hm 2For compound application.
[0018] Effect test:
[0019] In order to test the effect of the herbicide for planting Asarum truncatum provided by the present invention, the applicant has established a test field, and the control effect test on weeds such as barnyard grass, crabgrass, foxtail grass, purslane, and Polygonum truncatum in the Asarum truncatum planting environment is as follows:
[0020] 1.1 Test materials:
[0021] The tested herbicides are: 76% ethoxyethyl suspoemulsification; 38% atrazine suspension concentrate; 480g / L fluazifop emulsifiable concentrate; 48% butralin emulsifiable concentrate; 240g / L oxyfluorfen emulsifiable concentrate; 330g / L pendimethalin emulsifiable concentrate; 10%+40% chlorpyrifos emulsifiable concentrate; 50% sethoxydim emulsifiable concentrate; 960g / L S-isopropylamine emulsifiable concentrate.
[0022] The tested variety is Asarum Liaoxiong, a plant of the Aristolochiaceae family.
[0023] 1.2 Test materials:
[0024] The experiment included 8 treatments, including 76% ethoxyethyl ester suspoemulsion 1846.8 g.i. / hm 2 ; 38% atrazine suspension 1621.08 ga.i. / hm 2 ; 240g / l oxyfluorfen emulsifiable concentrate 129.6ga.i. / hm 2 ; 330g / l Pendimethalin EC 668.25ga.i. / hm 2 ; 10% + 40% ethyl emulsion 1012.5ga.i. / hm 2 ; 50% acetochlor EC 810ga.i. / hm 2 ; 960g / L S-Isopropylamine 777.6ga.i. / hm 2 ; 480g / l trifluralin emulsifiable concentrate 648ga.i. / hm 2 +48% butralin EC 1296ga.i. / hm 2 ; Clean water treatment was used as the weed control effect control; manual weeding was used as the Liao Xixin yield control.
[0025] Each treatment was repeated three times, with a total of 30 plots and a plot area of 10m 2 , randomized block arrangement, water consumption is 450L / hm 2 .
[0026] 1.3 Investigation time and method:
[0027] 1.3.1 Weed control effectiveness survey
[0028] Refer to the "Guidelines for Field Efficacy Tests of Pesticides" and investigate the efficacy 15, 30, and 45 days after application. Randomly sample 3 points in each plot to investigate the weed species and number of plants. 2 45 days after application, weed species and plant numbers were removed and fresh weight of weeds was investigated. Plant control efficacy and fresh weight control efficacy were calculated.
[0029] Plant protection effect (%) = [(number of plants in the clear water control area - number of plants in the sprayed area) / number of plants in the clear water control area] × 100
[0030] Fresh weight control effect (%) = [(fresh weight of clear water control area - fresh weight of sprayed area) / fresh weight of clear water control area] × 100
[0031] 1.3.2 Herbicide Safety Evaluation Survey
[0032] The germination of Asarum liaoxia was investigated 15, 30 and 45 days after application, the number of seedlings emerged was recorded and the emergence rate was calculated; 45 days after application, the plant height of Asarum liaoxia under different treatments was measured, the fresh weight of the plants was weighed, and the plant height inhibition rate and fresh weight inhibition rate were calculated.
[0033] Plant height inhibition rate (%) = [(control plant height - treatment plant height) / control plant height] × 100
[0034] Fresh weight inhibition rate (%) = [(control fresh weight - treatment fresh weight) / control fresh weight] × 100
[0035] 1.3.3 Growth and yield components
[0036] In mid-September, when the aboveground part of Asarum liaoxi was withering, 5 plants were randomly selected from each treatment, the soil around the roots was cleaned, and the root length, root diameter, and root surface area were measured using the WinRHIZO root system analysis system. The average value was used as the root length, root diameter, and root surface area of Asarum liaoxi in the plot. The fresh weight of the aboveground and underground plants was measured, and then they were placed in a 105°C oven for 30 minutes, and then dried at 55°C to constant weight, the dry weight was measured, and the total biomass and theoretical medicinal material yield were calculated.
[0037] Theoretical medicinal material output (kg / 667m 2 )=[667m 2 Number of plants planted (plants) × dry weight of single root (g)] / 1000
[0038] 1.4 Data Analysis
[0039] Microsoft Office Excel 2010 and SPSS 22.0 software were used for data processing and analysis, and Duncan's new multiple range method was used to test the significance of differences.
[0040] 2 Results and analysis
[0041] 2.1 Effect of herbicides on weed control in Asarum liao
[0042] The test results showed that the 8 herbicides had significant effects on weed control in the field of Liao Xixin, and there were significant differences between different herbicides (Table 1). 15 days after application, the weed control efficiency of each treatment reached more than 80%. 30 days after application, the weed control efficiency of 48% butralin EC + 480g / L trifluralin EC, 50% acetochlor EC, and 960g / L S-isopropylamine EC showed an upward trend, among which 50% acetochlor EC had the best effect, reaching 100%; the weed control efficiency of other treatments decreased. Except for the weed control efficiencies of 240g / L oxyfluorfen EC and 330g / L pendimethalin EC, which were 66.03% and 77.15% respectively, the weed control efficiencies of other treatments reached more than 85%. The weed control efficiency of each treatment 45 days after application was slightly lower than that 30 days after application, but the overall difference trend was similar, and the highest weed control efficiency was still the 50% acetochlor EC treatment (98.23%). The lowest weed control efficiency of fresh weight was 240g / L oxyfluorfen EC 45 days after application, which was only 73.03%, and the weed control efficiency of other treatments was above 88%. The fresh weight control efficiency of 76% ethoxyfen-octyl suspoemulsion, 48% butralin EC + 480g / L trifluralin EC, 10% + 40% fenpropimorph EC, 50% acetochlor EC, and 960g / L S-isopropylamine EC all reached above 96%, which was significantly higher than other treatments, and there was no significant difference among the five treatments. The second was the 38% atrazine suspension treatment, with a fresh weight control efficiency of 92.56%.
[0043] Table 1 Weed control effect
[0044]
[0045] 2.2 Safety evaluation of herbicides on Asarum liaoensis
[0046] The emergence rate of Liao Xixin in each treatment after application (see Table 2). The emergence rates of the three treatments of 76% acetothiazolinone suspoemulsion, 10% + 40% acetothiazolinone emulsion, and 960g / L S-isopropylamine were significantly lower than those of the control and other treatments at 15 days after application, which were 23%, 23.33%, and 24.11%, respectively. Visual observation of plant growth revealed that the new leaves of the three treatments showed obvious symptoms of phytotoxicity, such as yellowing and brown edges; all the aboveground parts of Liao Xixin died 30 days after application. The leaves of the plants treated with 50% acetothiazolinone emulsion showed slight yellowing, and the emergence rate was 92.89% at 15 days, and the emergence rate dropped to 82.67% at 30 days. The plants in the other treatments showed no symptoms of phytotoxicity, and the emergence rates were all above 98%. The emergence rates of the treatments did not change 45 days after application, which was the same as 30 days after application.
[0047] Table 2 Effects of herbicides on the emergence rate of Asarum truncatum
[0048]
[0049]
[0050] As shown in Table 3, the sensitivity of different herbicides to Asarum liaoxi is quite different. The inhibition rate of plant height is 6.95-100%, the inhibition rate of aboveground fresh weight is 21.56-100%, and the inhibition rate of underground fresh weight is 11.08-85%. The inhibition rates of plant height and aboveground fresh weight of Asarum liaoxi by 76% ethoxyethyl suspoemulsion, 10%+40% ethoxyethyl emulsion, and 960g / L S-isopropylamine all reached 100%, and the inhibition rate of underground part was above 85%, which is consistent with the emergence of seedlings after application, indicating that Asarum liaoxi is highly sensitive to these three herbicides and is not safe for Asarum liaoxi at this test concentration.
[0051] Table 3 Herbicide inhibition rate on plant height and fresh weight of Asarum liaoensis
[0052]
[0053] 2.3 Effects of herbicides on yield and yield components of Asarum liaoensis
[0054] On the basis of safety evaluation, except for three unsafe herbicides used in Liao Xixin production, the effects of herbicides on Liao Xixin yield and yield components were studied. As shown in Table 4, the effects of different herbicides on Liao Xixin root growth and material accumulation showed significant differences. In terms of root system, the total root length of 48% butarin EC + 480g / L trifluralin EC and manual weeding treatment was significantly higher than that of other treatments, and there was no significant difference between the two. The differences in root surface area and root volume between the treatments were similar: there was no significant difference between 48% butarin EC + 480g / L trifluralin EC and manual weeding, among which 48% butarin EC + 480g / L trifluralin EC was significantly higher than the clear water control and other treatments. In terms of material accumulation, the total biomass of the manual weeding treatment was the highest, and the total biomass was in the following order: manual weeding > 48% butralin EC + 480g / L trifluralin EC > 38% atrazine SC > water > 240g / L oxyfluorfen EC > 330g / L pendimethalin EC > 50% acetochlor EC. The total biomass of the 48% butralin EC + 480g / L trifluralin EC treatment was not significantly different from that of the manual weeding treatment, but was significantly higher than that of the other treatments and the water control. In terms of medicinal material yield, the theoretical medicinal material yield of each herbicide treatment was lower than that of the manual weeding treatment, except that the medicinal material yield of the 48% butralin EC + 480g / L trifluralin EC treatment was not significantly different from that of the manual weeding treatment. It can be seen that various herbicides have different degrees of inhibitory effects on the formation of Liao Xixin yield.
[0055] Table 4 Effects of herbicides on the root system and yield of Asarum truncatum
[0056]
[0057] 3 Conclusion and discussion
[0058] In the production of Asarum liaoensis, the large variety and density of weeds are one of the main reasons for the decline in medicinal material yield or quality. With the increase in market demand, manual weeding under large-scale planting has greatly increased the production cost of medicinal materials. The application of soil-sealed herbicides can play a good role in preventing and controlling weeds from the transplanting of Asarum liaoensis perennial roots to the seedling stage, saving manpower and material resources. This experiment designed 8 soil-sealed herbicide treatments for Asarum liaoensis cultivation. The results showed that the test agents could achieve more than 65% of the weed control effect and fresh weight control effect on Asarum liaoensis fields, and the weed control effect was good. Among them, the weed control effect of 76% ethoxyethyl suspoemulsion, 10% + 40% acetyl butyl emulsion, and 960g / L S-isopropylamine reached more than 90%, but the three agents inhibited the germination of young leaves of Asarum liaoensis, indicating that Asarum liaoensis has poor tolerance to these three soil-sealed regulators at the test concentration and should not be used in production.
[0059] The accumulation of dry matter is the basis for the formation of medicinal material yield, so the effect of herbicide use on the biomass accumulation of Asarum liao is an important indicator for screening efficient and safe herbicides. In addition, Asarum liao is a root medicinal material. Whether the application of soil-sealed herbicides inhibits root growth and thus affects the yield of medicinal materials is also a problem that needs attention. In this experiment, the growth performance of 48% butralin EC + 480g / L fluralin EC in root length, root surface area, and root volume was better than that of manual weeding treatment, and the total biomass accumulation and medicinal material yield were not significantly different from those of manual weeding treatment. It can be seen that the application of soil-sealed herbicides, on the one hand, prevents weeds from competing with the new young leaves of Asarum liao for light in the aboveground part, and on the other hand, avoids the nutrient competition between the two in the underground part, creating favorable conditions for the growth of Asarum liao.
[0060] A comprehensive comparison of the weed control effect of soil-sealed herbicides and their impact on the yield of Asarum sieboldii was made, and the experimental concentration of 48% butralin EC + 480 g / L trifluralin EC was suitable for weed control in Asarum sieboldii fields.
[0061] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A herbicide for planting Asarum liao, characterized in that: The herbicide is a compound of N-sec-butyl-4-tert-butyl-2,6-dinitroaniline and 2,6-dinitro-N,N-dipropyl-4-trifluoromethylaniline, with a weight ratio of 1:1.
997. The N-sec-butyl-4-tert-butyl-2,6-dinitroaniline can be 48% of trifluralin, and the 2,6-dinitro-N,N-dipropyl-4-trifluoromethylaniline can be 480g / L of trifluralin.
2. The herbicide for planting Asarum liao according to claim 1, characterized in that: The herbicide is in the form of emulsifiable concentrate.
3. The herbicide for planting Asarum liao according to claim 1, characterized in that: The herbicide is used for controlling monocotyledonous weeds and annual broadleaf weeds.
4. The method for using the herbicide for planting Asarum truncatum according to any one of claims 1 to 3, characterized in that: Use trifluralin 648ga.i. / hm 2 and 48% butralin 1294ga.i. / hm 2 For compound application.