CN111202087A - Composition for preventing and killing weeds in transplanted paddy field by propyrisulfuron and 2-methyl-4-sodium chloride and application thereof - Google Patents
Composition for preventing and killing weeds in transplanted paddy field by propyrisulfuron and 2-methyl-4-sodium chloride and application thereof Download PDFInfo
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- CN111202087A CN111202087A CN202010193721.4A CN202010193721A CN111202087A CN 111202087 A CN111202087 A CN 111202087A CN 202010193721 A CN202010193721 A CN 202010193721A CN 111202087 A CN111202087 A CN 111202087A
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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<
- A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
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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
- A01N39/00—Biocides, pest repellants or attractants, or plant growth regulators containing aryloxy- or arylthio-aliphatic or cycloaliphatic compounds, containing the group or, e.g. phenoxyethylamine, phenylthio-acetonitrile, phenoxyacetone
- A01N39/02—Aryloxy-carboxylic acids; Derivatives thereof
- A01N39/04—Aryloxy-acetic acids; Derivatives thereof
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- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Engineering & Computer Science (AREA)
- Plant Pathology (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
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Abstract
The invention discloses a composition for preventing and killing weeds in transplanted paddy fields by propyrisulfuron and 2-methyl-4-sodium chloride and application thereof. The herbicide composition can effectively prevent and kill off gramineous, broadleaf and cyperaceous weeds in transplanted paddy fields, and is safe to rice; the dosage can be obviously reduced, the application times can be reduced, and the chemical prevention and control cost in the field can be reduced; the generation and reoccurrence of the drug resistance of the weeds are delayed; expanding the weed control spectrum of the herbicide and the like. Is a feasible herbicide composition for preventing and killing weeds in transplanted paddy fields at present.
Description
Technical Field
The invention belongs to the technical field of plant protection, and relates to a herbicide composition taking propyrisulfuron and 2-methyl-4-chlorophenoxyacetic acid sodium as effective components, which is used for preventing and killing weeds in transplanted paddy fields.
Background
China has a long history of rice cultivation, and at least 7000 years of history are available today. More than 50% of the population in China takes rice as staple food, and the rice consumption is very large every year. Meanwhile, the planting area and the production of rice in China are in the world leading level, the annual sowing area is about 3000 hectares, which is only lower than that of the second place in India, more than 2 hundred million tons of rice are produced annually, and the first place in the world is in 113 rice planting countries all over the world.
The weeds are various and grow fast, the weeds are the main factors influencing the rice yield, and the yield reduction of the rice can reach more than 80 percent without taking any weeding measures. The main current weeding measure is to use herbicide to prevent and kill off the weeds chemically, according to rough statistics, the chemical weeding occupies more than 90% of the area of the rice field, and the chemical weeding has the advantages of labor saving, time saving, high efficiency, economy and the like and is accepted by vast farmers. But the long-term use of the chemical herbicide can easily cause drug resistance, the actual prevention effect in the field is reduced, the times of using the herbicide are more, and the dosage is larger. Therefore, how to improve the control effect of the herbicide and reduce the dosage of the herbicide is a problem which must be faced.
The propyrisulfuron is acetolactate synthase (ALS) inhibitor, and belongs to a selective, systemic and early stem and leaf treatment agent after seedling. Absorbed by the root, bud, etc. of the weed. The weeds are yellow and have tissue necrosis 3 to 4 days after the application, and the weeds die 7 to 10 days after the application. The propyrisulfuron has good effect on the weeds resistant to the sulfonylurea herbicide. Can simultaneously prevent and kill gramineous weeds, cyperaceae weeds and broad-leaved weeds, such as barnyard grass, Chinese iris, sedge heterotypically, water chestnut, monochoria vaginalis, rhizoma pleionis, ludwigia prostrata and the like, but has no effect on moleplant seeds.
The 2-methyl-4-chloro sodium is a phenoxy acetic acid selective hormone herbicide, is easy to absorb and transmit by roots and leaves, and destroys the metabolism of plants, so that the plants are deformed, swollen, rotten and dead. Can effectively control broad-leaved weeds and sedge weeds, but has no effect on gramineous weeds.
Disclosure of Invention
The invention aims to prevent and kill weeds in a rice transplanting field by using a herbicide composition.
The invention realizes the aim through the following technical scheme:
the main components of the herbicide composition are propyrisulfuron and 2-methyl-4-chloro-sodium, and the herbicide composition is used for preventing and killing weeds in rice transplanting fields.
The medicament using method comprises the following steps: the herbicide is applied when the weeds are in the 3-4 leaf stage, and is uniformly sprayed, and a shallow water layer with the depth of 2cm in a paddy field is kept for more than 4 days.
Compared with the existing common herbicide for paddy fields, the herbicide composition has the following advantages:
(1) has obvious synergistic effect on the transplanted paddy field weeds, and the preventing and removing effect is obviously superior to the preventing effect when a single agent is applied independently.
(2) Can obviously reduce the dosage, reduce the dosage frequency and reduce the chemical preventing and removing cost in the field.
(3) Can delay the generation and reoccurrence of drug resistance of weeds.
(4) Can control part of gramineous, broadleaf and cyperaceous weeds, and expand the weed control spectrum.
Detailed Description
(I) the compounding ratio of propyrisulfuron and 2-methyl-4-sodium chloride composition is screened and tested-indoor test:
indoor tests were conducted in the sunlight greenhouse of the herbicide virulence and drug resistance laboratory at the university of Nanjing agriculture, from 7 months in 2019 to 8 months in 2019.
Reagent to be tested: propyrisulfuron; 2 Methyl-4-chloro-sodium salt
The tested weeds: barnyard grass (collected in 10 months of 2018 from seven-eyed bridgetown, west show area, of ann cis city, Guizhou province);
carignane intestine (collected from the city of Yangzhou city of Jiangzhou Jiangdu town of Jiangsu province in 8 months in 2018)
Laboratory test procedure
1. Drug dose setting for screening test of compounding ratio of propyrisulfuron and 2-methyl-4-chloro-sodium
1.1 Each single dose setting is as follows:
propyrisulfuron (a): 0(A0), 5.13(A1), 10.25(A2), 20.5(A3), 41(A4), 82(A5) g a.i./hm2；
2 m 4 chloro sodium (B): 0(B0), 25(B1), 50(B2), 100(B3), 200(B4), 400(B5) g a.i./hm2。
1.2 the dosage setting of the screening test medicament of the propyrisulfuron and 2-methyl-4-chloro-sodium composition is shown in table 1:
TABLE 1 screening dosage setting table for propyrisulfuron and 2-methyl-4-chloro-sodium composition
2. Screening test process for compounding ratio of propyrisulfuron and 2-methyl-4-chloro-sodium
Organic soil without herbicide is filled into a plastic cup with the specification of 7 multiplied by 7cm, the pH value is 6.7, and the organic matter content is 1.4%. Selecting barnyard grass and carignan seeds with full seeds, sowing 20 seeds in each plastic cup, covering a layer of fine soil on the seeds in the plastic cup for sowing the barnyard grass, covering no soil on the plastic cup for sowing the carignan seeds, adding water until the plastic cup is saturated, and culturing in a greenhouse. And (5) performing final singling when the weeds are in a 3-4 leaf stage, wherein 12 plants are planted in each pot. Spray-treating stem and leaf, spraying equal amount of clear water as control, and repeating each treatment for 4 times. The spraying adopts a 3WP-2000 model walking type biological measurement spraying tower produced by Nanjing agricultural mechanization research institute of agricultural department, the rotation speed of a main shaft is 96mm/r, the spraying height is 300mm, the effective spraying amplitude of a spray head is 350mm, the flow rate of the spray head is 390mL/min, the walking distance is 1340mm, the volume of a liquid medicine is 30mL, and the device is placed in a greenhouse for growth (the temperature is 27 ℃ in the daytime and 22 ℃ at night).
At 30d after application, the fresh weight of weeds in each plastic box was recorded by investigation. The combined weed suppression effect of the compounded medicament is evaluated by a Gowing method, the fresh weight inhibition rates of single-dose propyrisulfuron, 2-methyl-4-sodium chloride and the compounding agent of the propyrisulfuron and the bensulfuron methyl are respectively calculated (formula 1), the theoretical fresh weight inhibition rate of the compounding agent (formula 2) is calculated according to the actual fresh weight inhibition rates of the single-dose propyrisulfuron and the 2-methyl-4-sodium chloride, and the type of the combined weed suppression effect is evaluated by comparing the theoretical fresh weight inhibition rate with the actual fresh weight inhibition rate of the compounding agent:
fresh weight inhibition ratio (% control fresh weight-treated fresh weight)/control fresh weight × 100 — formula 1
E0 ═ X + Y-XY/100-equation 2
In the formula, E0 is the theoretical fresh weight inhibition rate of the herbicide propyrisulfuron and 2-methyl-4-chlorophenoxy acetic acid sodium after compounding, X is the actual measurement fresh weight inhibition rate of the herbicide propyrisulfuron, and Y is the actual measurement fresh weight inhibition rate of the herbicide 2-methyl-4-chlorophenoxy acetic acid sodium. And if E is the actually measured fresh weight inhibition rate of the compound of propyrisulfuron and 2-methyl-4-sodium chloride, the compound is in antagonism when E-E0 is less than-10, is in addition action when E-E0 is more than-10, and is in synergism when E-E0 is more than 10.
The results of the laboratory tests are shown in the following table:
TABLE 2 inhibition of Echinochloa crusgalli and carignane by compounding propyrisulfuron with 2-methyl-4-sodium chloride (E)
TABLE 3 theoretical inhibition of propanil and carine by compounding propyrisulfuron with 2-methyl-4-sodium chloride (E)0)
TABLE 4 evaluation of the combined action of propyrisulfuron and 2-methyl-4-sodium chloride on barnyard grass and carignane
As can be seen from tables 2-4, propyrisulfuron and 2-methyl-4-sodium chloride both have high activity to barnyard grass and carine, and the combination of propyrisulfuron and 2-methyl-4-sodium chloride shows synergistic effect to barnyard grass and carine. As can be seen from the fresh weight inhibition effects of the propyrisulfuron and 2-methyl-4-sodium chloride composition with different proportions in tables 2-4 on barnyard grass and carignane, the combined weed inhibition effect is evaluated by comparing the theoretical fresh weight inhibition rate with the actual fresh weight inhibition rate of the compound agent, the control cost of the propyrisulfuron and 2-methyl-4-sodium chloride, the control effect improvement and other factors are comprehensively considered, and the optimal proportion is 1: 5 when the propyrisulfuron and 2-methyl-4-sodium chloride composition in the field is used for controlling transplanted weeds in rice.
Safety test-indoor test of (di) propyrisulfuron and 2-methyl-4-sodium chloride composition for transplanted paddy field
Indoor experiments are carried out in the sunlight greenhouse of the herbicide toxicity and drug resistance laboratory of Nanjing agriculture university from 8 months to 9 months in 2019.
Reagent to be tested: propyrisulfuron; 2 Methyl-4-chloro-sodium salt
Test work: japonica rice (Huai rice No. 5); indica rice (Hanyou 73)
Laboratory experiment process
1. Safety test medicament dose setting of propyrisulfuron and 2-methyl-4-chloro-sodium composition on transplanted paddy field
The safety test of the composition on rice the dose settings of the agents are as follows:
propyrisulfuron + 2-methyl-4-chloro sodium: 0+0, 5.13+25, 10.25+50, 20.5+100, 41+200, 82+400ga.i./hm2
2. Safety test process of propyrisulfuron and 2-methyl-4-chloro-sodium composition for transplanting paddy field
Loading organic soil without herbicide into plastic pot, sowing plump seeds of japonica rice and indica rice, adding water until saturation, and growing in greenhouse (temperature: 30 deg.C in daytime and 25 deg.C at night). A plastic bowl with the specification of 22 multiplied by 15 multiplied by 10cm is filled with organic soil without herbicide, the pH value is 6.7, the organic matter content is 1.59 percent, and water is added until the organic soil is saturated. Transplanting japonica rice and indica rice seedlings in 3-4 leaf stage into a plastic bowl. 10 japonica rice and 10 indica rice are transplanted in each plastic bowl, the transplanting depth is uniform, the seedlings survive in shallow water after transplanting, and the water layer is kept 1-2 cm. And when the rice is in the 5-6 leaf stage, spraying the pesticide to the sown rice by adopting a spraying method, spraying equivalent clear water in contrast, and repeating the treatment for 4 times. The spraying adopts a 3WP-2000 model walking type biological measurement spraying tower produced by Nanjing agricultural mechanization research institute of agricultural department, the rotation speed of a main shaft is 96mm/r, the spraying height is 300mm, the effective spraying amplitude of a spray head is 350mm, the flow rate of the spray head is 390mL/min, the walking distance is 1340mm, the volume of a liquid medicine is 30mL, and the device is placed in a greenhouse for growth (the temperature is 27 ℃ in the daytime and 22 ℃ at night).
30 days after the application of the composition, the fresh weight of each treated rice is investigated and recorded, the DPS software is used for analyzing the significance of the difference between different dosages and calculating the selectivity index of the composition, and the safety of the composition of propyrisulfuron and 2-methyl-4-sodium chloride on the rice is evaluated through the two aspects.
Fresh weight inhibition ratio (% control fresh weight-treated fresh weight)/control fresh weight × 100
The selectivity index is calculated as:
selectivity index (Z) versus ED for crop plants10ED of weeds90
TABLE 5 evaluation of safety of japonica rice 30 days after drug administration
Note: significance of difference at 0.05 level of Duncan New Complex Difference method
TABLE 6 evaluation of safety of indica 30 days after drug administration
Note: significance of difference at 0.05 level of Duncan New Complex Difference method
TABLE 7 Selectivity index of the combination of propyrisulfuron and 2-methyl-4-chloro-sodium for rice
As can be seen from tables 5 and 6, the inhibition effect on the fresh weight of rice is not obviously increased with the increase of the dosage of the composition of propyrisulfuron and 2-methyl-4-sodium chloride through the significance test by the DPS software, and there is no difference significance between the average fresh weight of each treatment and the average fresh weight of a control, and as can be seen from table 7, the selectivity index of the composition of propyrisulfuron and 2-methyl-4-sodium chloride on japonica rice is 5.85, and the selectivity index on indica rice is 6.45 and is greater than 4. Therefore, from the safety evaluation and the selectivity index evaluation of the composition of propyrisulfuron and 2-methyl-4-sodium chloride on the fresh weight of rice, the composition of propyrisulfuron and 2-methyl-4-sodium chloride is safe for the growth of rice.
Claims (7)
1. A composition for preventing and killing the weeds in transplanted paddy field by propyrisulfuron and 2-methyl-4-chloro-sodium and its application are disclosed.
2. The composition for preventing and killing the weeds in the transplanted paddy fields of propyrisulfuron and 2-methyl-4-chloro-sodium according to claim 1 has the control effect on barnyard grass and carignane of more than 90 percent under the proper dosage proportion.
3. The composition for preventing and killing the weeds in the transplanted paddy field by the propyrisulfuron and the 2-methyl-4-chlorophenoxyacetic acid sodium according to the claim 1 is safe to rice under the experimental set dosage and has no phytotoxicity.
4. According to the claim 1, compared with a single-dose, the promazisulfuron and 2-methyl-4-chloro-sodium weed control composition for preventing and killing the transplanted paddy field weeds can expand the weed control spectrum, and can control gramineous weeds, broad-leaved weeds and sedge weeds.
5. The composition according to claim 1, wherein the propyrisulfuron is used at a dosage of 41-82 g a.i./hm2The dosage of the 2-methyl-4-chloro sodium is 200-400 g a.i./hm2In the range, propyrisulfuron: when the ratio of the 2-methyl-4-chloro sodium to the 2-methyl-4-chloro sodium is 1: 5, the effect on preventing and killing weeds in the field is optimal.
6. The composition of propyrisulfuron and 2-methyl-4-sodium chloride for preventing and killing weeds in transplanted paddy fields according to claim 1, which is characterized in that the propyrisulfuron and the 2-methyl-4-sodium chloride are used as active ingredients and are prepared into any one of dosage forms with auxiliary agents allowed in pesticides.
7. The application of the composition as claimed in claim 1, wherein the application method of the composition for controlling the weeds in the transplanted paddy field by propyrisulfuron and 2-methyl-4-sodium chloride is stem and leaf spraying treatment.
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| CN202010193721.4A CN111202087A (en) | 2020-03-12 | 2020-03-12 | Composition for preventing and killing weeds in transplanted paddy field by propyrisulfuron and 2-methyl-4-sodium chloride and application thereof |
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| CN202010193721.4A CN111202087A (en) | 2020-03-12 | 2020-03-12 | Composition for preventing and killing weeds in transplanted paddy field by propyrisulfuron and 2-methyl-4-sodium chloride and application thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016172734A (en) * | 2016-03-22 | 2016-09-29 | 住友化学株式会社 | Herbicidal composition |
| CN106577711A (en) * | 2015-10-16 | 2017-04-26 | 江苏龙灯化学有限公司 | Weeding composition |
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- 2020-03-12 CN CN202010193721.4A patent/CN111202087A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106577711A (en) * | 2015-10-16 | 2017-04-26 | 江苏龙灯化学有限公司 | Weeding composition |
| JP2016172734A (en) * | 2016-03-22 | 2016-09-29 | 住友化学株式会社 | Herbicidal composition |
| JP2017019844A (en) * | 2016-03-22 | 2017-01-26 | 住友化学株式会社 | Herbicidal composition |
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