CN115702642A - Herbicide containing pyraclonil and benzobicyclon and application thereof - Google Patents
Herbicide containing pyraclonil and benzobicyclon and application thereof Download PDFInfo
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- CN115702642A CN115702642A CN202110898119.5A CN202110898119A CN115702642A CN 115702642 A CN115702642 A CN 115702642A CN 202110898119 A CN202110898119 A CN 202110898119A CN 115702642 A CN115702642 A CN 115702642A
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- benzobicyclon
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Abstract
The invention discloses a herbicide containing pyraclonil and benzobicyclon and application thereof. The herbicide comprises the effective components of pyraclonil and benzobicyclon, wherein the mass ratio of the pyraclonil to the benzobicyclon in the herbicide is 1:1.32-1.4. The pyraclonil and the benzobicyclon are mixed, so that the weeding speed and the lasting period can be complemented, the control effect of the product is increased, the harm to beneficial organisms is correspondingly reduced, and the negative effect of pesticide on environmental pollution is reduced.
Description
Technical Field
The invention relates to a herbicide, and particularly relates to a herbicide containing pyraclonil and benzobicyclon and application thereof.
Background
Benzobicyclon (Benzobicyclon): belongs to triketone herbicides and is an HP PD inhibitor. The benzobicylon is absorbed by the roots and stems of the weeds and then transmitted to the whole plants, and mainly acts on the biochemical synthesis of carotenoid in the photosynthetic pigments, so that the content of the carotenoid is reduced, the leaves of the weeds are whitened, and the weeds are killed.
Pyraclonil (Pyraclonil): the herbicide belongs to protoporphyrinogen oxidase (PPO) inhibitors, is a contact herbicide, is absorbed by the roots and basal parts of weeds, the weeds are browned, then yellow leaves, necrotic, withered or dried and dehydrated to cause withering, and has outstanding control effect on annual weeds such as barnyard grass, firefly, boea felter, bluetongue grass, and burclover.
Weeds in rice fields seriously affect the yield and quality of rice. The long-term use of a single herbicide can cause the weeds to generate drug resistance, and simultaneously, the effective utilization rate of the chemical herbicide is reduced, so that the residue of agricultural products and soil exceeds the standard. Therefore, the method has important significance for screening the herbicide composition with the synergistic effect by combining two or more than two active ingredients.
Disclosure of Invention
The invention aims to: in order to solve the problems in the prior art, the invention provides a herbicide containing pyraclonil and benzobicylon and application thereof.
The technical scheme is as follows: the invention relates to a herbicide containing pyraclonil and benzobicyclon, which comprises the effective components of pyraclonil and benzobicyclon, wherein the mass ratio of the pyraclonil to the benzobicyclon in the herbicide is 1:1.32-1.4.
Preferably, the mass ratio of pyraclonil to benzobicyclon is 1:1.32, 1:1.34, 1: 1.35 or 1:1.4.
preferably, the weight percentage of the sum of the mass of the benzobicyclon and the pyraclonil in the herbicide is 10-40%.
Preferably, the herbicide is in the form of aqueous suspension, dispersible oil suspension, emulsifiable concentrate, water dispersible granules or granules.
The herbicide containing pyraclonil and benzobicylon is used for preventing and controlling annual weeds in direct-seeding paddy fields.
Preferably, the annual weeds in the direct-seeded rice field comprise barnyard grass, monochoria vaginalis, edible tulip and cyperus heterophyllus.
Preferably, the application method comprises the steps of sowing the direct-seeded rice for 10-20 days, applying the barnyard grass to the field before the 2.5-leaf period after the field is dried and rehydrated, keeping a water layer of 3-5 cm in the field during application until the heart and leaves of the rice seedlings are not submerged, and keeping the water layer for more than 7 days after application.
Preferably, the herbicide of the invention is a large granule, and the use method of the agent comprises the following steps: after sowing the direct-seeding rice for 10-20 days, after sun drying and re-watering, before the barnyard grass 2.5 leaves, using a water-soluble bag large particle agent to throw and apply the pesticide, keeping a water layer of 3-5 cm in the field during pesticide application until the heart and leaves of the rice seedling are not submerged, and keeping the water layer for more than 7 days after pesticide application.
Has the beneficial effects that: (1) The benzobicyclon and pyraclonil have different action mechanisms and strong complementarity, and the mixed formulation can delay the generation of drug resistance of a single dose. (2) The pyraclonil and the benzobicylon have good fresh weight inhibition effect on annual and part of perennial weeds in the direct-sowing paddy fields, and the combination of the pyraclonil and the benzobicylon has synergistic effect on annual and part of perennial weeds in the direct-sowing paddy fields. (3) The mixing of the two weeding compositions of the invention can complement each other in the aspects of weeding speed and lasting period, and the control effect of the product is increased. (4) The invention can make the beneficial organism suffer the damage by using the pesticide for many times, and the pesticide can reduce the pesticide application times and the pesticide application time by mixing and using the pesticide, correspondingly reduce the harm to the beneficial organism and reduce the negative effect of the pesticide on environmental pollution.
Detailed Description
Example 1: and (4) formulation screening test.
1.1 weeds and crops tested: barnyard grass, monochoria vaginalis, sargassum heterotropoides seeds and bulb of edible tulip were collected from Nanjing in 2015.
1.2 test agents: 97% of pyraclonil technical, and 98% of benzobicyclon technical.
1.3 experimental design: the dose of pyraclonil is set as follows: 0. 3, 6, 12, 24, 48g a.i./hm 2 (ii) a The dosage of the benzobicyclon is set to 0, 5, 10, 20, 40, 80g a.i./hm 2 . The above treatments were randomly arranged in blocks and repeated 4 times. The pyraclonil and the benzobicylon are prepared into 10000 mu g/mL mother liquor by using acetone as raw materials, and are uniformly mixed with a proper amount of fine soil and then are spread when in use.
1.4 test methods: in 2016, soil with a depth of 10cm is filled in plastic pots in 5 days 4 months, the soil is soaked by water, and 30 pieces of monochoria vaginalis and barnyard grass are sown in each pot, and 15 bulbs of edible tulip are sown in each pot. After germination, growing barnyard grass to 2-3 leaf stage, 2-4 leaf stage of monochoria vaginalis, and 2-3 leaf stage of heterotype nutgrass flatsedge, and fixing seedlings by 20 plants/pot; the field arrowhead seedlings are fixed at the 1-2 leaf stage, and 10 plants are planted in each pot. The appropriate amount of mother liquor is measured according to the set dosage of the test, and is uniformly mixed with a small amount of fine soil and then is spread. Weed damage was observed and recorded after application.
1.5 investigation method and time: after the application, the weed damage condition is observed, the fresh weight of the weeds is investigated at 20d after the application, and the fresh weight inhibition rate is calculated.
The combined effect of the 2 medicaments on the monochoria vaginalis, the barnyard grass, the edible tulip and the abnormal sedge after being compounded is evaluated by an equivalent line method. Performing professional statistics by DPS software, and respectively calculating ED of the two medicaments with treatment doses for inhibiting 4 weeds 50 (i.e., a dose that inhibits 50% of the fresh weight of weeds). According to ED corresponding to each dose of the two medicaments 50 The value is that the dose of the pyraclonil is used as the abscissa and the dose of the benzobicylon is used as the ordinate, and the ED of the inhibition effect of the 2 medicaments on the 4 weeds after the combination is drawn 50 Finding out the equivalent line of two kinds of ED agents in the synergistic region 50 And determining the optimal ratio of the pyraclonil to the benzobicylon by using the coordinate value of the point with the farthest connecting line, namely the maximum synergistic point.
1.6 results and analysis
1.6.1 fresh weight inhibition of Echinochloa crusgalli
As can be seen from the table 1, the fresh weight inhibition rate of the pyraclonil on the barnyard grass is increased to a certain extent along with the increase of the dosage of the benzobicylon at 20 days after the application of the herbicide, and the specific results are shown in the table 1. According to an equivalent line method, the two compound barnyard grass show synergistic effect, the maximum synergistic point is (6.52, 8.81), namely the compound ratio of the pyraclonil to the benzobicylon is 1: 1.35.
TABLE 1 fresh weight inhibition of barnyard grass by Bixapyroxad and mesotrione combination (20 days after application)
1.6.2 inhibiting action on fresh weight of herba Monochoriae
23, after 20 days, the fresh weight inhibition rate of the pyraclonil on the monochoria vaginalis is generally increased along with the increase of the dosage of the diclosulone under the same dosage; similarly, the total fresh weight inhibition of the same dose of the benzobicyclon against monochoria vaginalis also increased with increasing dose of pyraclonil, as shown in table 2. According to an equivalent line method, the two compound monochoria vaginalis show synergistic effect, the maximum synergistic point is (5.45, 7.31), namely the compound ratio of the pyraclonil to the benzobicylon is 1: 1.34.
TABLE 2 fresh weight inhibition of pyraclonil and mesotrione on monochoria vaginalis after application (20 days)
1.6.3 inhibiting action on fresh weight of edible tulip
As can be seen from table 3, at 20d after the administration, the fresh weight inhibition rate of the pyraclonil on the edible tulip is increased along with the increase of the dose of the benzobicyclon; similarly, the total fresh weight inhibition of mesotrione at the same dose to tulip also increased with increasing doses of pyraclonil, as shown in table 3. According to an equivalent line method, the two compound pair of edible tulip shows synergistic effect, the maximum synergistic point is (6.59, 9.25), namely the compound ratio of the pyraclonil to the benzobicyclon is 1: 1.40.
TABLE 3 fresh weight inhibition ratio of pyraclonil and benzobicylon to tussore (20 days after administration)
1.6.4 inhibition of fresh weight of Heteroshacao
As can be seen from Table 4, the fresh weight inhibition rate of pyraclonil on the heterotype sedge is increased along with the increase of the dosage of the benzobicylon at 20 days after the application of the herbicide under the same dosage; similarly, the total fresh weight inhibition of mesotrione at the same dose to sedges increased with increasing doses of pyraclonil, as shown in table 4. According to an equivalent line method, the two compound special-shaped sedges have synergistic effect, the maximum synergistic point is (5.89, 7.76), namely the compound ratio of the pyraclonil to the benzobicylon is 1:1.32.
TABLE 4 fresh weight inhibition of pyraclonil and mesotrione on cyperus rotundus (20 days after application)
As can be seen from the results in tables 1-4, the pyraclonil and the benzobicylon of the invention have good fresh weight inhibition effect on annual and part of perennial weeds in direct-sown paddy fields, and the two compounds have synergistic effect on annual and part of perennial weeds in direct-sown paddy fields. The maximum synergistic ratio of the pyraclonil to the benzobicylon is 1: 1.35, the maximum synergistic ratio to the monochoria vaginalis is 1:1.34, the maximum synergistic ratio to the edible tulip is 1.40, and the maximum synergistic ratio to the deformed cyperus is 1.32.
Example 2: field control effect of benzobicyclon and pyraclonil on annual weeds in rice direct seeding fields
Test subjects: the main weeds in the field are barnyard grass, moleplant seed, cyperus rotundus, amaranthus marsupium and the like. :
the test method comprises the following steps: and (4) treating the soil. The test land is flat, the fertility is uniform, and the paddy field is managed according to a conventional method. The rice is directly sown 15 days later at the 2-3 leaf stage and the 2-4 leaf stage of the weeds. A blank control treatment zone was set and repeated 4 times, and the cells were arranged in random blocks. And (5) surveying weeds in each plot 15 days after the application of the herbicide, and calculating the fresh weight control effect.
Control effect (%) = (number of fresh plants of weeds in control area (fresh weight) — number of plants of weeds in treated area (fresh weight))/number of plants of control weeds (fresh weight) × 100%
Test agents:
treatment 1: the mass ratio of the benzobicyclon to the pyraclonil is 1.4:1 (active ingredient amount 225g a.i./hm, pesticide application amount 150g, mL/mu)
And (3) treatment 2: the mass ratio of the bicyclsulcotrione to the pyraclonil is 1.4:1 (active ingredient amount 262.5g a.i./hm, application dose 175g, mL/mu)
And (3) treatment: the mass ratio of the bicyclsulcotrione to the pyraclonil is 1.4:1 (active ingredient amount 300g a.i./hm, pesticide application dose 200g, mL/mu)
And (4) treatment: the mass ratio of the bicyclsulcotrione to the pyraclonil is 1.4:1 (525g a.i./hm effective component, 350g drug application dose, mL/mu)
And (4) treatment 5:25% benzobicyclon suspension (active ingredient 187.5g a.i./hm, application dose 50g, mL/mu)
And (6) treatment: 2% pyraclonil granules (180g a.i./hm of active ingredient, 600g of application dose, mL/mu)
And (7) treatment: artificial weeding
And (4) treatment 8: blank control
TABLE 5 field control of annual weeds in direct-seeded rice fields with mesotrione and pyraclonil
As can be seen from Table 5, the benzobicyclon and pyraclonil compositions have good control effects on the main weeds in the fields, and the control effects are increased along with the increase of the using amount. The preparation with the best drug effect is a large granule.
Claims (7)
1. A herbicide containing pyraclonil and benzobicyclon is characterized in that: the herbicide comprises the effective components of pyraclonil and benzobicyclon, wherein the mass ratio of the pyraclonil to the benzobicyclon in the herbicide is 1:1.32-1.4.
2. A herbicide containing pyraclonil and mesotrione as claimed in claim 1, wherein: the mass ratio of the pyraclonil to the benzobicyclon is 1:1.32, 1:1.34, 1: 1.35 or 1:1.4.
3. a herbicide containing pyraclonil and mesotrione as claimed in claim 1, wherein: the weight percentage of the sum of the weight of the bicyclsulcotrione and the pyraclonil in the herbicide is 10-40%.
4. A herbicide containing pyraclonil and mesotrione as claimed in claim 1, wherein: the herbicide is in the form of aqueous suspension, dispersible oil suspension, missible oil, water dispersible granules or granules.
5. The herbicide containing pyraclonil and benzobicyclon as claimed in claim 1 is used for controlling annual weeds in direct-seeded rice fields.
6. Use according to claim 5, characterized in that: annual weeds in the direct seeding field of paddy rice comprise barnyard grass, monochoria vaginalis, edible tulip and cyperus rotundus.
7. The application of claim 5, wherein the application method comprises the steps of directly sowing rice for 10-20 days after sowing, applying the cockspur grass 2.5 leaves before drying in the sun after re-watering of the field, keeping a water layer of 3-5 cm in the field during application until the heart and leaves of seedlings are not submerged, and keeping the water layer for more than 7 days after application.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000319114A (en) * | 1999-04-28 | 2000-11-21 | Agrevo Japan Kk | Herbicide having synergistic action |
| CN104255749A (en) * | 2014-09-10 | 2015-01-07 | 广东中迅农科股份有限公司 | Herbicide composition containing pyraclonil and benzobicylon |
| CN106577699A (en) * | 2016-12-13 | 2017-04-26 | 河北博嘉农业有限公司 | Ternary herbicidal composition containing pyraclonil and benzobicylon |
| CN106818830A (en) * | 2017-01-23 | 2017-06-13 | 河北博嘉农业有限公司 | A kind of ternary weeding composition containing pyraclonil, benzobicylon and sulfonylurea herbicide |
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- 2021-08-05 CN CN202110898119.5A patent/CN115702642A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000319114A (en) * | 1999-04-28 | 2000-11-21 | Agrevo Japan Kk | Herbicide having synergistic action |
| CN104255749A (en) * | 2014-09-10 | 2015-01-07 | 广东中迅农科股份有限公司 | Herbicide composition containing pyraclonil and benzobicylon |
| CN106577699A (en) * | 2016-12-13 | 2017-04-26 | 河北博嘉农业有限公司 | Ternary herbicidal composition containing pyraclonil and benzobicylon |
| CN106818830A (en) * | 2017-01-23 | 2017-06-13 | 河北博嘉农业有限公司 | A kind of ternary weeding composition containing pyraclonil, benzobicylon and sulfonylurea herbicide |
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