CN108849957B - Post-emergence compound herbicide containing triafamone and benthiocarb for rice - Google Patents
Post-emergence compound herbicide containing triafamone and benthiocarb for rice Download PDFInfo
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- CN108849957B CN108849957B CN201810984503.5A CN201810984503A CN108849957B CN 108849957 B CN108849957 B CN 108849957B CN 201810984503 A CN201810984503 A CN 201810984503A CN 108849957 B CN108849957 B CN 108849957B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/38—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< where at least one nitrogen atom is part of a heterocyclic ring; Thio analogues thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/12—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing a —O—CO—N< group, or a thio analogue thereof, neither directly attached to a ring nor the nitrogen atom being a member of a heterocyclic ring
Abstract
The invention discloses a post-emergence compound herbicide containing triafamone and benthiocarb for paddy rice, which comprises the effective components of the triafamone and the benthiocarb in a weight ratio of 1:1 to 9. The compound herbicide can prevent and kill annual gramineous weeds such as moleplant seed and barnyard grass in paddy fields, and can prevent and kill broadleaf weeds and cyperaceae weeds, has obvious weeding effect, particularly has obvious synergistic effect on the moleplant seed and the barnyard grass, has no influence on afterreap crops, can be used for sealing treatment before seedlings and weeding after the seedlings, and is an ideal herbicide.
Description
Technical Field
The invention relates to the technical field of pesticides, and particularly relates to a post-emergence compound herbicide for rice, which contains triazolyl oxamide and thiobencarb.
Background
The rice is not only the most important grain crop in China, but also one of the main grain crops in the world. Nearly half of the world's population, including almost the entire east and southeast asia population, is fed on rice; its production also extends over continents other than the south pole. Regardless of planting area and yield, the method is the top in food crops in China. In all rice growing areas of China, a large amount of weeds occur all the time. Moderate vegetation areas account for over 46% of the total planted area, with severe areas over 11.5%, thereby losing over 200 billion kilograms of grain per year. Therefore, the using proportion of the herbicide in the domestic paddy field almost reaches 100 percent, and the dosage of the herbicide is very large.
Paddy field barnyard grass is an important weed in paddy fields. Barnyard grass, Latin's name Echinochloa crusgalli (L.) Beauv., an annual herbaceous plant with extremely similar appearance to rice. Barnyard grass grows in rice fields, swamps, near ditches and in low-lying wastelands. The shape is similar to rice but the leaves are rough and astringent and the color is lighter. The barnyard grass and the rice can absorb the nutrients in the rice field together, so the barnyard grass is a malignant weed in the rice field. Barnyard grass is grown in the rice paddy areas in the south and north, and a plurality of varieties such as red barnyard grass, green barnyard grass, rice barnyard grass, Jiangsu barnyard grass and the like are developed at present.
The moleplant seed belongs to annual weed of moleplant seed of Gramineae, and is another gramineous weed which is difficult to prevent and control in the paddy field. Before the last 90 s, the method mainly occurs beside direct seeding rice fields in coastal lake areas, and transplanting fields and seedling throwing fields rarely occur. The original inferior grass species gradually become the dominant species with the change of cultivation system and the increase of resistance of the pesticide for preventing barnyard grass. The generation area is increasingly large, and the generation field block type is visible everywhere not only in the direct seeding field, but also in the transplanting field and the seedling throwing field. The field is not limited to the edge of the field, but is gradually increased in the field. The moleplant genus is mainly grown in paddy fields except dry lands, and is of the same genus as rice and barnyard grass in Gramineae. At present, cyhalofop-butyl is mainly used for controlling.
With the development of agricultural science and technology, the popularization and application of chemical herbicides have been one of powerful yield increasing measures for saving labor, time and cost. Because the continuous use of the bensulfuron-methyl, the pyrazosulfuron-ethyl and other medicaments can gradually reduce the harm of the original serious weed eyeweed and the abnormal sedge, the harm of the perennial edible tulip, the alisma orientale, the sedge weeds, the annual sedge flowers and the like is aggravated, and the bispyribac-sodium herbicide can cause serious harm to the perennial scirpus planiculmis and the iris lactea in many areas.
Triazolyl oxamide is a triazolinone herbicide developed by north-kingdom chemical industries, japan, and has a mechanism of action of a protoporphyrinogen oxidase inhibitor, and rapidly dries out and dies leaves by inhibiting the destruction of cell membranes caused by protoporphyrinogen oxidase in a chlorophyll biosynthesis process. Can be used before and after germination, is mainly used for preventing and killing barnyard grass, cyperaceae weeds and partial broadleaf weeds in the paddy field, and has not ideal effect on moleplant seed.
The thiobencarb is insoluble in water and soluble in organic solvents. Is a systemic conduction selective herbicide, is mainly absorbed by the roots and the buds of the weeds, is used as a soil treatment agent, can also be used after seedlings or in rice transplanting fields, is safe to rice, and has excellent control effect on barnyard grass. The composition is suitable for preventing and killing barnyard grass, hairy euphorbia, sedge, moleplant seed, crabgrass, cricket grass, green bristlegrass, ground sedge, purslane speedwell, aloesbill, etc. in rice, wheat, soybean, peanut, corn, vegetable fields and orchards. The fertilizer can be used in rice seedling beds, direct seeding beds and rice transplanting beds, is applied before barnyard grass is in the period from the germination peak to the 2-leaf stage, and is safe for rice.
Through the inquiry of a Baiteng patent network, the compounding combination of the triazolam and the thiobencarb is not available at present, and no public report is provided.
Disclosure of Invention
The invention aims to overcome the defect of narrow respective weeding spectrum of the triazolyl amine and the benthiocarb, provides the compound herbicide for the paddy field, which can prevent and remove grassy weeds such as barnyard grass and moleplant seed, and can prevent and remove broadleaf weeds and nutgrass flatsedge, has good effect, can be used for sealing treatment before seedling and weeding after seedling, and is an ideal herbicide.
In order to achieve the above object, the present invention provides the following technical solutions:
the post-emergence compound herbicide containing the triazolamide and the benthiocarb for the rice comprises the effective components of the triazolamide and the benthiocarb, wherein the weight ratio of the triazolamide to the benthiocarb is 1:1 to 9.
In a further scheme, the weight ratio of the triazolyl oxamide to the thiobencarb is 1:5 to 9.
Preferably, the weight ratio of the triazolyl oxamide to the thiobencarb is 1: 7.
in a further scheme, the sum of the mass of the triazolyl oxamide and the mass of the bentazone accounts for 0.1-85% of the total mass of the compound herbicide.
In a further scheme, the compound herbicide is dispersible oil suspending agent, granules, wettable powder, water dispersible granules, missible oil, emulsion in water or microemulsion.
The combined action after blending is evaluated by a Sunweier cotoxicity coefficient method, and the result shows that the triazolyl oxamide and the thiobencarb are mixed according to the weight ratio of 1: the co-toxicity coefficient of 5-9 proportion of the compound is obviously more than 120, so that the obvious synergistic effect is achieved, and the formula shows that the content of the triazolam and the thiobencarb is 1: 5-9 proportion mixing has synergistic effect. Wherein, the ratio of the triazolyl oxamide to the thiobencarb is 1: the 7-action compound has the maximum synergistic effect and has obvious synergistic effect on annual monocotyledonous and dicotyledonous weeds.
The test of safety measurement of rice shows that ED for inhibiting 10% of rice growth is obtained by DPS software104784.7474 ED 90% inhibition of weed growth901013.0282, selectivity coefficient 4784.7474/1013.0282 ═ 4.72>2, the medicament is considered to have obvious selectivity, and the triazolam-dicranostigma has good safety to rice.
The compound herbicide disclosed by the invention is proved to be safe to rice by 2 years of field efficacy tests that the rice does not have phytotoxicity symptoms from the application to the mature period in the 2-leaf period of the rice and 1-3-leaf unequal period of weeds. The weed control effect reaches more than 80% in 10 days and more than 92% in 40 days, the control effect is obviously enhanced along with the increase of the dosage, the weeds in the whole growth period of crops can be controlled by applying the herbicide once, the weeding effect is obvious, and the weeding composition is environment-friendly and has no influence on the next-stubble crops.
Compared with the prior art, the compound herbicide can prevent and kill gramineous weeds, broadleaf weeds and cyperaceae weeds, is safe to rice, has no influence on afterculture crops, and has good application prospect.
Detailed Description
The invention discloses a post-emergence compound herbicide for paddy rice, which comprises two active ingredients of triafamone and thiobencarb. It is expressly intended that all such similar substitutes and modifications which would be obvious to one skilled in the art are deemed to be included in the invention. While the invention has been described in terms of preferred embodiments, it will be apparent to those skilled in the art that the techniques of the invention can be implemented and practiced with modification, or with appropriate modification, and combinations of the methods and applications described herein without departing from the spirit, scope, and spirit of the invention.
The invention is further illustrated by the following examples:
example 1: dispersible oil suspension agent (triazolyl oxamide: dicranolol 1:1) for preparing compound herbicide
18 percent of the triazolam-thiobencarb dispersible oil suspending agent, wherein 18 percent refers to the percentage of the triazolam and the thiobencarb which are two active components in the total weight.
Taking 9kg of triazolyl oxamide, 9kg of thiobencarb, 8kg of Pluronic125, 5kg of propylene glycol, 0.5kg of xanthan gum and methyl esterified vegetable oil to make up to 100 kg. The oil suspending agent is obtained by fully mixing, blending, ball milling, crushing, adjusting and packaging.
Example 2: granules of the compound herbicide are prepared (triazolyl oxamide: dicranolol-1: 3).
4 percent of the triazolam-thiobencarb granules, wherein 4 percent refers to the percentage of the triazolam and the thiobencarb which are two active components in the total weight.
Taking 1kg of triazolyl oxamide, 3kg of thiobencarb, 2kg of naphthalenesulfonic acid-formaldehyde condensate, 3kg of sodium dodecyl benzene sulfonate and the balance of kaolin to 100kg
Example 3: the emulsifiable concentrate (triazolyl oxamide: dicentra ═ 1:5) of the compound herbicide is prepared.
Taking 6kg of triafamone, 30kg of thiopica graminifolia, 5kg of alkylphenol polyoxyethylene ether as an emulsifier, 5kg of sodium dodecyl sulfate as an emulsifier, and complementing the solvent low naphthalene solvent oil to 100 kg.
Example 4: wettable powder (triazolyl oxamide: diclofop-methyl 1: 7) of the compound herbicide is prepared
64 percent of the triadimefon-thiobencarb wettable powder, and 64 percent of the triadimefon-thiobencarb and thiobencarb accounts for the total weight of the triadimefon-thiobencarb and the thiobencarb. 8kg of triazolam, 56kg of thiobencarb, 4kg of dispersant NNO, 3kg of wetting agent K12, 4kg of white carbon black and light calcium carbonate are taken to make up to 100 kg. The wettable powder is obtained by fully mixing, airflow crushing and mixing.
Example 5: water dispersible granules (triazolyl oxamide: dicranolol 1: 9) for preparing the compound herbicide
60% of the water dispersible granule containing the tolfentramide and the thiobencarb, wherein 60% refers to the percentage of the two active components of the tolfentramide and the thiobencarb in the total weight. Taking 6kg of triazolyl oxamide, 54kg of thiobencarb, 7kg of D-425, 5kg of EFW, 5kg of ammonium sulfate, 2kg of polyethylene glycol and kaolin to complement 100 percent, and fully mixing, airflow crushing, mixing, granulating, drying and screening to obtain the water dispersible granule.
Example 6: indoor activity determination of joint action of triazolyl oxamide and dicranostigma graminifolium stem and leaf treatment
1. Purpose of the experiment
Under the greenhouse condition, a pot experiment method is adopted to research the weeding effect of binary combination of the triazolam and the thiobencarb, and the combined action type of the triazolam and the thiobencarb after being mixed in different proportions is evaluated by a Sunweier co-toxicity coefficient method, so that scientific basis is provided for reasonable mixing of the triazolam and the thiobencarb.
2. Test conditions
2.1 test crop rice variety: hui Liang you 898
2.2 the weed moleplant seed (Leptochloachiconnis (L.) Nees), barnyard grass (Echinochloroacrgalli (L.) Beauv.), burclover (Rotala indica (Willd.) Koehne), monochoria vaginalis (Burm. f.) Presl, and Cyperus difformis (Cyperus difformis L.) were field-harvested one year before the test, and the germination rate was more than 85%.
2.3 test conditions and culture of test Material
The incubation of the test material was carried out in a light-operated incubator at a temperature of 25-30 ℃. Selecting a polyethylene plastic pot with the diameter of 15cm and the height of 15 cm. During the test, 30-40 seeds of each weed are uniformly placed in a pot, the soil is covered by 0.5cm, and water required for growth is supplemented during the weed cultivation period.
2.4 other conditions
Periodically replenishing water in a bottom water seepage mode (no watering is carried out within 2 days after the pesticide is applied), and maintaining the soil humidity.
Design of the experiment
3.1 Agents
3.1.1 test Agents
98% of a triazolyl oxamide technical material (owned by the limited responsibility company of agro-chemical, Fengle, Anhui);
97% of thiobencarb technical (south Tongtai Hei chemical Co., Ltd.).
3.1.2 preparation of test agent
Weighing quantitative raw medicine with electronic balance, adding appropriate amount of emulsifier, dissolving with acetone, and diluting with 0.1% Tween 80 water solution to desired concentration.
3.1.3 test design
3.1.3.1 Combined action of Triazolecarboxamide and Liaocarb
5 doses of the triazolam, the single dose of the diclazonmethyl and 5 mixed preparations of the triazolam and the diclazonmethyl are respectively set, and the proportion is the weight ratio of the active ingredients of the triazolam to the diclazonmethyl. A blank control was also set and each experimental treatment was repeated 4 times. The treatment doses are detailed in table 1.
Table 1 test treatment and test level (concentration mga.i./kg)
3.2 methods of application
3.2.1 methods of administration
Spraying the stems and leaves of the rice in the 2-leaf stage and the 1-3-leaf stage of the weeds. The spraying adopts an indoor crown block type spraying test device with adjustable speed to simulate the conventional spraying method in the field. The spray head is a fan-shaped spray head, the model is Teejer8002E, and the spray quantity is 40 kilograms per mu. The height of the spraying is 0.5 m, the spraying width is 0.7 m, and the pace speed is 0.224 m/s. The spraying pressure was 2.0 MPa and the flow rate was 697 l/min.
3.2.2 application time and frequency
The test is carried out by spraying the pesticide for 1 time at the 2-leaf stage of the rice.
4 investigation method
After the application, the damage symptoms of the rice and the weeds are recorded in detail, and 20d after the application, fresh weight measurement is carried out and compared with control treatment, and the fresh weight control effect is calculated.
4.1 Combined Effect 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 logarithm of the concentration as X and the pest control efficiency value as Y.
Actual toxicity index is the standard drugAgent LD50LD of mixture50×100
Theoretical virulence index ═ Σ (virulence index of a test agent x the percentage of active ingredient in the mixture) of the agent
The co-toxicity coefficient is the actual toxicity index/theoretical toxicity index of the mixed preparation multiplied by 100
In the test, the thiobencarb is used as a standard medicament.
And (3) judging standard: the co-toxicity coefficient is less than 80, the antagonism is the addition effect between 80 and 120, and the synergy is more than 120.
5 results and analysis
5.1 Combined action of Triazolecarboxamide and Liaocarb
5.1.1 mix the triazamate with the diclazuril to control the fresh weight of the weeds, the results are shown in Table 2.
TABLE 2 fresh weight control of weeds 20 days after the mixed dose of triazamide and dicranostil
The control effect in the table is an average of four data.
5.1.2 Combined action of Carbamide and Dicamba graminifolia on weeds
As can be seen from Table 2: the drug has the toxic action and the control effect on weeds. Calculating respective toxicity regression equation and LD thereof by formula50Actual virulence index, theoretical virulence index and cotoxicity coefficient. Are shown in Table 3.
Table 3: combined action of mixed triazolam and benthiavalicarb on weeds
As can be seen from the experiments, the co-toxicity coefficients of treatment C, D, E, F, G were: 56.95, 96.82, 151.10, 158.29 and 149.34, wherein the co-toxicity coefficient of D, E, F treatment is more than 120, so that the synergistic effect is achieved, particularly the co-toxicity coefficient of F treatment is the largest and reaches 158.29, and the synergistic effect is remarkable.
5.1.3 conclusion of the test
Through tests, the triafamone and the thiobencarb are prepared according to the following steps of 1: 5-9 proportion mixing has synergistic effect, wherein the ratio of the mefenacet to the thiobencarb is 1: about 7, has obvious synergistic effect on moleplant seed, barnyard grass, broad-leaved weed and cyperaceae weed.
6 comprehensive evaluation
The combined action determination results show that the ratio of the triazolamide to the benthiazole is 1: 5-9, wherein the proportion of 1: the compounding effect is optimal in about 7 proportion.
Example 7: test for testing safety of triafamone-thiobencarb compounded stem and leaf treatment on rice
1. The purpose of the test is as follows:
under the greenhouse condition, a pot experiment method is adopted to research the safety of the binary compound stem and leaf treatment of the triazolam and the thiodan on the rice, and a scientific basis is provided for reasonable mixing of the triazolam and the thiodan.
2. Test conditions
2.1 test crop rice variety: hui Liang you 898
2.2 the weed moleplant seed (Leptochloachiconnis (L.) Nees), barnyard grass (Echinochloroacrgalli (L.) Beauv.), burclover (Rotala indica (Willd.) Koehne), monochoria vaginalis (Burm. f.) Presl, and Cyperus difformis (Cyperus difformis L.) were field-harvested one year before the test, and the germination rate was more than 85%.
2.3 test conditions and culture of test Material
The incubation of the test material was carried out in a light-operated incubator at a temperature of 25-30 ℃. Selecting a polyethylene plastic pot with the diameter of 15cm and the height of 15 cm. During the test, 20 rice seeds and 30-40 weed seeds are uniformly put into a pot and covered with 0.5cm of soil, the pot is placed into a greenhouse for cultivation (25-30 ℃), and water required for growth is supplemented during the cultivation of the rice seedlings and the weeds. And (4) leaving 10 robust seedlings after the seedlings emerge completely, and applying the pesticide when the rice seedlings grow to 2 leaves and the weeds grow to 1-3.
2.4 other conditions
Periodically supplementing water by top watering (no watering is carried out within 2 days after the pesticide is applied), and maintaining the soil humidity.
Design of the experiment
3.1 Agents
3.1.1 test Agents
98% of a triazolyl oxamide technical material (owned by the limited responsibility company of agro-chemical, Fengle, Anhui);
97% of thiobencarb technical (south Tongtai Hei chemical Co., Ltd.).
3.1.2 preparation of test agent
Weighing quantitative raw medicine with electronic balance, adding appropriate amount of emulsifier, dissolving with acetone, and diluting with 0.1% Tween 80 water solution to desired concentration.
3.2 methods of application
3.2.1 methods of administration
Spraying the stems and leaves of the rice in the 2-leaf stage and the 1-3-leaf stage of the weeds. The spraying adopts an indoor crown block type spraying test device with adjustable speed to simulate the conventional spraying method in the field. The spray head is a fan-shaped spray head, the model is Teejer8002E, and the spray quantity is 40 kilograms per mu. The height of the spraying is 0.5 m, the spraying width is 0.7 m, and the pace speed is 0.224 m/s. The spraying pressure was 2.0 MPa and the flow rate was 697 l/min.
3.2.2 application time and frequency
The test is carried out by spraying the pesticide for 1 time at the 2-leaf stage of the rice.
4 investigation and calculation method
4.1 crop investigation
After the application, the existence of phytotoxicity symptoms of the treated rice is investigated, if yes, the phytotoxicity symptoms and the grade are recorded in detail, and the fresh weight of the treated rice is measured 20 days after the application, and the fresh weight inhibition rate is calculated to clearly test the safety of the pesticide on the rice.
4.2 weed investigation
After the application, the damage symptoms (such as growth inhibition, chlorosis, deformity and the like) of the weeds are recorded in detail, and 20 days after the application, the fresh weight of the overground part of each treated weed is weighed, and the fresh weight control effect of the weeds is calculated.
4.3 calculation method
DPS software is used for carrying out regression analysis on the logarithm value of the medicament dose and the probability value of the fresh weight inhibition rate of the rice, calculating a correlation coefficient and the dose ED when the crop is inhibited by 10 percent10And ED at a dose of 90% inhibition of weeds90And calculating the selectivity index.
Selectivity index ED10/ED90
5 results and analysis
5.1 safeness of Triazolecarboxamide-Lepidium graminearum Stem and leaf treatment on Rice
The safety evaluation standard is shown in a table 4, and the observation of 3 days after the application shows that the central lobe of individual rice treated by the triadimefon-thiobencarb has slight yellow color and slightly inhibited growth when the triadimefon-thiocarb is at a high concentration of 6400mg/kg, and the rice treated by other concentrations has normal growth; 7-12 days after the application, the low concentration treated rice has normal growth, and the rice treated at 6400mg/kg also recovers slowly. The rice inhibition by 64% of the tolfentramide-diclavone WP (example 4) 20 days after application is shown in Table 5.
TABLE 4 evaluation criteria for herbicidal Activity and crop safety by visual inspection
TABLE 564% inhibition of Dichlortolanilide-Dicamba-WP on Rice
TABLE 664% fresh weight control of Dichlortolanil-dicentra WP on weeds
From Table 6, the toxicity and control effect of the herbicide on weeds can be seen, and the toxicity regression equation and LD thereof can be calculated by formula50Listed in Table 7.
Table 7: regression equation of virulence andLD50
as can be seen from Table 7: LD of 64% Triazolecarboxamide-Lepidium Benth WG50Comprises the following steps: 292.3539 with 95% confidence intervals of 253.7376-336.8472.
5.2 Selectivity index of Triazolecarboxamide-Lepidium graminearum Stem and leaf treatment on Rice and weeds
The ED for 10% inhibition of rice growth was determined from tables 5 and 6 by DPS software104784.7474 ED 90% inhibition of weed growth901013.0282, selectivity coefficient 4784.7474/1013.0282 ═ 4.72>2, the medicament is considered to have obvious selectivity and can be used for field drug effect tests.
6 comprehensive evaluation
6.1 the test results show that the treatment of stems and leaves of the triafamone-thiobencarb with high concentration (4 times of the recommended dosage) can cause the yellowing of the rice and slightly inhibit the growth of the rice, and the treatment of other concentrations (the recommended dosage is high and the times thereof) can ensure the normal growth of the rice.
6.2 indoor toxicity tests show that the triafamone-thiobencarb paddy rice has good safety and good weed control effect.
Example 8: the field efficacy test of the compound herbicide
The compound herbicide disclosed by the invention is proved by 2-year field efficacy tests that in the 2-leaf stage of rice and in the 1-3-leaf inequality stage of weeds, 64% of triazolam-thiobencarb (8% of triazolam + 56% of thiobencarb) WP dosage of 80, 100, 120 and 200 g/mu is mixed with water for spraying at a rate of 40 kg/mu, rice safety and weed control effect are visually observed in 15, 40 days and the mature period, the control effect is measured in 15 and 40 days, and the results are as follows:
note: in the table, the data of the blank control are the number of weed plants (plants), and the data of the blank control are the plant control effect (%).
By visual inspection, the rice is safe to the rice because no phytotoxicity symptom is observed from the application to the mature period. The 64% triazolam-thiobencarb (8% triazolam + 56% thiobencarb) WP 80 g/mu has the weed control effect of more than 80% in 10 days and more than 92% in 40 days, the control effect is obviously enhanced along with the increase of the dosage, the weeding effect on the weeds in the paddy field is good at 80 g/mu, and compared with the single use of one of the active ingredients, the weeding composition enlarges the weeding spectrum and has obvious synergistic effect on the gramineous weeds and the broadleaf weeds. The herbicide can control weeds in the whole growth period of crops by once application, has obvious weeding effect, is environment-friendly, has no influence on next-stubble crops, has small pollution to the environment, is safe to people, livestock, birds and beneficial organisms, and is beneficial to keeping ecological balance. In addition, the herbicide is processed by a physical method, the production process is simple, three wastes are not discharged in the production process, and no adverse effect is caused on the ecological environment. Is a compound herbicide with ideal control effect at present.
Example 9: the compound herbicide of the invention seals the field efficacy test before the seedling
The field efficacy test of the compound herbicide for 2 years shows that the 60% triafamone-thiobencarb water dispersible granule (6% triafamone and 54% thiobencarb) is sprayed with water at the dosage of 100, 120, 150 and 240 g/mu and mixed with water at the dosage of 40 kg/mu before rice seedlings emerge after sowing, the safety and weed control of rice can be visually observed in 15, 40 days and mature period, the control effects can be observed in 15 and 40 days, and the results are as follows:
note: in the table, the data of the blank control are the number of weed plants (plants), and the data of the blank control are the plant control effect (%).
By visual inspection, the rice is safe to the rice because no phytotoxicity symptom is observed from the application to the mature period. The 60% triafamone-thiobencarb water dispersible granule (6% triafamone and 54% thiobencarb) has the control effect on weeds of 100 g/mu, reaches more than 95% in 15 days and still reaches more than 92% in 40 days, the control effect is obviously enhanced along with the increase of the dosage, and the water dispersible granule has good weeding effect on weeds of 100 g/mu in a paddy field. The herbicide can control weeds in the whole growth period of crops by once application, has obvious weeding effect, is environment-friendly, has no influence on next-stubble crops, has small pollution to the environment, is safe to people, livestock, birds and beneficial organisms, and is beneficial to keeping ecological balance. In addition, the herbicide is processed by a physical method, the production process is simple, three wastes are not discharged in the production process, and no adverse effect is caused on the ecological environment. Is a compound herbicide with ideal control effect at present.
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.
Claims (4)
1. A post-emergence compound herbicide for paddy rice containing triafamone and benthiocarb is characterized in that: the effective components of the composition are the triazolam and the thiobencarb, and the weight ratio of the triazolam to the thiobencarb is 1:5 to 9.
2. The compound herbicide as claimed in claim 1, wherein: the weight ratio of the triazolyl oxamide to the thiobencarb is 1: 7.
3. the compound herbicide as claimed in claim 1 or 2, wherein: the sum of the mass of the triazolyl oxamide and the mass of the benthiocarb accounts for 0.1-85% of the total mass of the compound herbicide.
4. The built herbicide as claimed in any one of claims 1 to 2, wherein: the compound herbicide is dispersible oil suspending agent, granules, wettable powder, water dispersible granules, missible oil, emulsion in water or microemulsion.
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| CN105007729A (en) * | 2012-12-31 | 2015-10-28 | 巴斯夫欧洲公司 | Herbicidal composition comprising a cornexistin |
| CN107920507A (en) * | 2015-10-14 | 2018-04-17 | 组合化学工业株式会社 | Granular agrichemical composition |
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| CN104770385B (en) * | 2015-04-02 | 2016-10-12 | 安徽丰乐农化有限责任公司 | A kind of Oryza sativa L. post-emergence complex weedicide |
| CN104782646A (en) * | 2015-04-24 | 2015-07-22 | 安徽丰乐农化有限责任公司 | Disposable compound post-emergence herbicide for rice |
| CN104855391A (en) * | 2015-05-24 | 2015-08-26 | 安徽丰乐农化有限责任公司 | Post-emergence herbicide containing bispyribac-sodium and ipfencarbazone used for rice |
| JP2017178802A (en) * | 2016-03-29 | 2017-10-05 | 日本農薬株式会社 | Horticultural pest control agent composition and use method therefor |
| CN113016811A (en) * | 2017-11-09 | 2021-06-25 | 青岛清原化合物有限公司 | Weeding composition containing topramezone and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105007729A (en) * | 2012-12-31 | 2015-10-28 | 巴斯夫欧洲公司 | Herbicidal composition comprising a cornexistin |
| CN107920507A (en) * | 2015-10-14 | 2018-04-17 | 组合化学工业株式会社 | Granular agrichemical composition |
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