CN104770385A - Post-seedling compound herbicide for rice seedlings - Google Patents
Post-seedling compound herbicide for rice seedlings Download PDFInfo
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- CN104770385A CN104770385A CN201510155852.2A CN201510155852A CN104770385A CN 104770385 A CN104770385 A CN 104770385A CN 201510155852 A CN201510155852 A CN 201510155852A CN 104770385 A CN104770385 A CN 104770385A
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- penoxsuam
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Abstract
The invention discloses a post-seedling compound herbicide for of rice seedlings. The post-seedling compound herbicide comprises penoxsulam and 1-(2,4-dichlorophenyl)-N-(2,4-difluorophenyl)-1,5-dihydro-N-(1-methylethyl)-5-oxo-4H-1,2,4-triazole-4-carboxamide, the mass percent content of the penoxsulam and 1-(2,4-dichlorophenyl)-N-(2,4-difluorophenyl)-1,5-dihydro-N-(1-methylethyl)-5-oxo-4H-1,2,4-triazole-4-carboxamide accounts for 0.1-85% of the total mass of the rice post-seedling compound herbicide, wherein the weight ratio of the penoxsulam to the 1-(2,4-dichlorophenyl)-N-(2,4-difluorophenyl)-1,5-dihydro-N-(1-methylethyl)-5-oxo-4H-1,2,4-triazole-4-carboxamide is (1.2-3) to (10-24). The post-seedling compound herbicide for the rice seedlings is capable of preventing and controlling annual grassy weeds such as moleplant seeds and barnyard grass in a paddy field, and capable of preventing and controlling broad-leaved weeds and cyperaceae weeds, the weeding effect is obvious, and the compound herbicide has obvious synergism on the moleplant seeds and the barnyard grass, cannot influence afterreap crops, and is an ideal herbicide.
Description
Technical field
The present invention relates to weed killer herbicide field, specifically a kind of paddy rice post-emergence complex weedicide.
Background technology
Paddy rice is not only the main cereal crops of China, one of Ye Shi world staple food crop.Nearly half population, comprises the population in almost whole East Asia and Southeast Asia in the world, is all food with rice.Produce throughout each continent except the South Pole.Eighties of last century late period, View of World Rice annual production average out to about 4,000 hundred million kilograms, cultivated area about 1.45 hundred million hectares.China's rice growing face accounts for 1/4 of national cereal crops, and every year about more than 3,500 ten thousand hectares, output then accounts for over half.No matter cultivated area and output, all ranks first in China cereal crops.The rice field of all rice workspaces of China, always has a large amount of weeds to occur.Medium crop smothering area accounts for more than 46% of total cultivated area, and wherein serious injured area is more than 11.5%, loses more than 200 hundred million kilograms, grain every year thus.Therefore, the usage ratio of domestic water herbicides for use in paddy almost reaches 100%, and its dosage is very large.
Along with the development of agricultural cience and farming techniques, chemical herbicide apply as saving of labor, save time, one of cost-effective strong well stimulation.Make originally to occur heavier malignant weed pondweed owing to using the medicament such as bensulfuron-methyl, pyrazosulfuron continuously and difformed galingale herb harm progressively alleviates, and the harm such as perennial angustifolia arrowhead herb, rhizoma alismatis, sedge weed and annual Monochoria korsakowii increases the weight of, because penoxsulam amine weed killer herbicide causes serious harm to perennial flat stalk Fischer grass, firefly Lin in many areas.
Penoxsuam belongs to aryloxyphenoxypropionic class weed killer herbicide.Paddy field selective herbicide, both can do cauline leaf process, also can do bud pre-treatment.Penoxsuam is efficient to barnyard grass, also has good preventive effect to sedge weed and broad leaved weed, bad to moleplant seed effect.
Triazole acyl grass amine is the triazolineone weed killer herbicide developed by Japanese Hokko Chemical Industry Co., Ltd., its mechanism of action is proporphyrinogen oxidase inhibitor, causing cell membrane disruption by suppressing proporphyrinogen oxidase in chlcrophyll biosynthesis process, making blade withered, dead rapidly.All can use before bud, after bud, be mainly used in preventing and kill off paddy field grassy weed, sedge weed and part broad leaved weed.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of paddy rice post-emergence complex weedicide, can prevent and kill off grassy weed, can prevent and kill off broad leaved weed again, and respond well.
Technical scheme of the present invention is:
A kind of paddy rice post-emergence complex weedicide, include penoxsuam and triazole acyl grass amine, the mass percentage of penoxsuam and triazole acyl grass amine is 0.1-85% of described paddy rice post-emergence complex weedicide total amount, and wherein, the weight ratio of tralkoxydim and flucarbazone is 1.2-3:10-24.
Also include dispersant, wetting agent, disintegrant, binding agent and reagent carrier in described paddy rice post-emergence complex weedicide, wherein, the percentage by weight of dispersant, wetting agent, disintegrant and binding agent is 0.1-10%; 0.1-10%; 0.1-20%; 0.1-20%, reagent carrier supplies 100%.
The weight ratio of described penoxsuam and triazole acyl grass amine is 1.6-2.4:12-20.
The weight ratio of described penoxsuam and triazole acyl grass amine is 2:16.
The formulation of described paddy rice post-emergence complex weedicide is for dispersibling oil-suspending agent, granule, wetting powder, water dispersible granules, missible oil, aqueous emulsion, microemulsion or suspending agent.
Beneficial effect of the present invention is:
The synergy after mixture is evaluated by the co-toxicity coefficient method of Sun Yunpei, result display penoxsuam, triazole acyl grass amine are obviously greater than 120 in the co-toxicity coefficient that 1.6-2.4:12-20 ratio is composite, reach remarkable synergistic effect, illustrate that penoxsuam, triazole acyl grass amine all has synergistic effect in 1.6-2.4:12-20 ratio mixture, wherein, it is maximum that penoxsuam, triazole acyl grass amine presses the effect of 2:16 effect compound synergic, has significant synergies to annual single broadleaf weed.
Show the Security test test of paddy rice, the composite cauline leaf process of penoxsuam triazole acyl grass amine, suppresses the ED of paddy growth 10%
10=1968.0878, suppress the ED of weed growth 90%
90=253.2570, selectivity factor is 1968.0878/253.2570=7.77>2, thinks that this medicament has obvious selectivity, and penoxsuam triazole acyl grass amine has good safety to paddy rice.
Complex weedicide of the present invention is shown by the field control effectiveness test of 2 years, and in the paddy rice 3 leaf phase, weeds 2-5 leaf does not wait the phase, and paddy rice has no symptom of chemical damage from dispenser to maturing stage, to rice safety.The preventive effect of weeds reaches more than 80% in 10 days, within 40 days, reaches more than 92%, along with the increase of dosage, preventive effect obviously strengthens, and a dispenser can control the weeds in crop whole vegetative period, and not only herbicidal effect is remarkable, and environmentally friendly, on second stubble crop without impact.
Compared with prior art, complex weedicide of the present invention can prevent and kill off grassy weed, can prevent and kill off broad leaved weed and sedge weed again, to rice safety, and on succession crop without impact, has a good application prospect.
Embodiment
Embodiment 1
A kind of paddy rice post-emergence complex weedicide, its formulation is 60% penoxsuam triazole acyl grass amine wetting powder, and 60% refers to that penoxsuam and triazole acyl grass amine two kinds of active components account for the percentage of gross weight; It includes following component: 10kg penoxsuam, 50kg triazole acyl grass amine, 4kg dispersant-sodium methylene bis-naphthalene sulfonate (NNO), 3kg wetting agent-lauryl sodium sulfate (K12), 4kg disintegrant-white carbon, 4kg binding agent-carboxymethyl cellulose (CMC), carrier precipitated calcium carbonate 25kg.Said components through fully mixing, air-flow crushing, be mixed to get product.
Embodiment 2
A kind of paddy rice post-emergence complex weedicide, its formulation is that 18% penoxsuam triazole acyl grass amine dispersibles oil-suspending agent, 18% refers to that penoxsuam and triazole acyl grass amine two kinds of active components account for the percentage of gross weight, include following component: 2kg penoxsuam, 16kg triazole acyl grass amine, 8kg dispersant-block polyether non-ionic surface active agent (Pluronic125), 5kg wetting agent-propane diols, 0.5kg disintegrant-xanthans, 1kg binding agent-methylated vegetable oil, carrier water 67.5kg.Said components through abundant mixing preparation, ball mill grinding, adjust, be packaged to be product.
Embodiment 3
A kind of paddy rice post-emergence complex weedicide, its formulation is 78% penoxsuam triazole acyl grass amine water dispersible granules, 78% refers to that penoxsuam and triazole acyl grass amine two kinds of active components account for the percentage of gross weight, include following component: 6kg penoxsuam, 72kg triazole acyl grass amine, 7kg dispersant-naphthalenesulfonate formaldehyde condensation compound (D-425), the mixture (EFW) of 5kg wetting agent-alkylnaphthalene sulfonate and anion wetting agent, 5kg disintegrant-ammonium sulfate, 2kg binding agent-polyvinyl alcohol (PVA), carrier kaolin 3kg.Said components obtains product through fully mixing, air-flow crushing, mixing, granulation, drying and screening.
Embodiment 4
Penoxsuam and triazole acyl grass amine cauline leaf process synergy toxicity measure:
1, test objective: under greenhouse experiment, adopt pot-culture method, the herbicidal effect of research penoxsuam, triazole acyl grass amine binary built, and the synergy type after using with both co-toxicity coefficient method evaluations different proportion of Sun Yunpei, for the rational mixture of penoxsuam and triazole acyl grass amine provides scientific basis.
2, for studying thing: rice varieties-Feng Liangyou; For examination weeds: moleplant seed (Leptochloachinensis (L.) Nees), barnyard grass (Echinochloa crusgalli (L.) Beauv.), mexicana (Rotala indica (Willd.) Koehne), Monochoria vaginalis (Monochoriavaginalis (Burm.f.) Presl), difformed galingale herb (Cyperus difformis L.) field upper one year are gathered seed, and germination rate is more than 85%).
3, the cultivation of experimental condition and examination material: the cultivation carrying out test material in illumination cultivation room, temperature 25-30 DEG C.Choosing diameter is 15cm, is highly the vinyon basin alms bowl of 15cm.During test, often kind of weed seed 30-40 grain is evenly put into basin, earthing 0.5cm, the required moisture of growth between weeds culture period, should be supplemented.With the regular moisturizing of mode (not watering in 2 days after medicine) of bottom infiltration, keep soil moisture.
4, reagent agent: the former medicine of 98% penoxsuam (The Dow Agrosciences, LLC.); The 95% triazole acyl grass former medicine of amine (providing for oneself).Take quantitative above-mentioned former medicine with electronic balance, add appropriate emulsifier, with acetone solution, finally with the Tween 80 aqueous solution of 0.1%, above-mentioned former medicine is diluted to desired concn.
5, the synergy of penoxsuam and triazole acyl grass amine: include penoxsuam single dose, triazole acyl grass amine single dose and 5 penoxsuams and triazole acyl grass amine mixture preparation, wherein, the ratio in mixture preparation is the active component weight ratio of penoxsuam and triazole acyl grass amine; Separately establish blank, each test process repetition 4 times.Treatment agent dosage refers to table 1.
Table 1 tests process and test level (concentration ga.i./kg)
6, application method: in paddy rice 3 leaf phase, weeds 2-4 leaf phase cauline leaf spraying process.Spray medicine adopts the indoor crown-block type atomizing tester of adjustable speed, simulation field conventional spraying methods.Shower nozzle is Fan spray head, and model is Teejer8002E type, spray value 40 kgs/acre.Spray height 0.5 meter, spraying swath 0.7 meter, leg speed 0.224 meter per second.Atomisation pressure 2.0 MPa, flow 697 liters/min.Test and carry out reagent spray process in the paddy rice 3-5 leaf phase, dispenser 1 time.
7, investigation method: the damage symptoms recording paddy rice and weeds after dispenser in detail, 20d after medicine, carries out fresh weight measurement, and compared with control treatment, calculates fresh weight preventive effect.
The co-toxicity coefficient method evaluation of result of the test Sun Yunpei use with after synergy type.Its actual toxicity index, mixture theoretical toxicity index, co-toxicity coefficient is calculated according to SUN, Y-P (Sun Yunpei) method.Take log concentration as X, damage by disease and insect preventive effect probit value is Y, asks regression equation.
Actual toxicity index=standard agent LD
50the LD of/mixture
50× 100;
Theoretical toxicity index=∑ (percentage of this medicament active ingredient of the toxicity index of reagent agent × in mixture);
Actual toxicity index/theoretical toxicity index × 100 of co-toxicity coefficient=mixture;
In test with triazole acyl grass amine for standard agent.
Criterion: co-toxicity coefficient <80 is antagonism, be summation action between 80-120, >120 is synergistic effect.
8, results and analysis:
The synergy of penoxsuam and triazole acyl grass amine:
Penoxsuam and triazole acyl grass amine mixture, to the fresh weight preventive effect of weeds, the results are shown in Table 2.
After table 2 penoxsuam and triazole acyl grass amine mixture medicine, 20d is to the fresh weight preventive effect of weeds
PS: in table, control efficiency is the mean value of four data.
As shown in Table 2: medicament is to the toxic action situation of weeds and preventive effect.
Penoxsuam and triazole acyl grass amine mixture are to the synergy of weeds:
By virulence regression equation, the LD of each experimental group of formulae discovery
50, actual toxicity index, theoretical toxicity index and co-toxicity coefficient.Specifically in table 3.
Table 3: penoxsuam and triazole acyl grass amine mixture are to the synergy of weeds
As shown in Table 3, the co-toxicity coefficient of process C, D, E, F, G is respectively: 150.45,182.06,228.03,151.50,101.55, and co-toxicity coefficient is all greater than 100, has addition or synergistic effect; Wherein, the co-toxicity coefficient of process C, D, E, F is all obviously greater than 120, and reach synergistic effect, the co-toxicity coefficient wherein processing E is maximum, reaches 228.03, has significant synergies.
Conclusion (of pressure testing): known by testing, penoxsuam, triazole acyl grass amine is in (1.6-2.4): (12-20) ratio mixture all has synergistic effect, wherein, it is comparatively suitable that penoxsuam, triazole acyl grass amine presses about 2:16 mixture, has significant synergies to moleplant seed, barnyard grass, broad leaved weed and sedge weed.
Embodiment 5
The composite cauline leaf process of penoxsuam triazole acyl grass amine is tested the Security test of paddy rice:
1, test objective: under greenhouse experiment, adopts pot-culture method, studies penoxsuam, the process of triazole acyl grass amine binary built cauline leaf to the safety of paddy rice, for the rational mixture of penoxsuam and triazole acyl grass amine provides scientific basis.
2, for studying thing: rice varieties-Feng Liangyou; For examination weeds: moleplant seed (Leptochloachinensis (L.) Nees), barnyard grass (Echinochloa crusgalli (L.) Beauv.), mexicana (Rotala indica (Willd.) Koehne), Monochoria vaginalis (Monochoriavaginalis (Burm.f.) Presl), difformed galingale herb (Cyperus difformis L.) field upper one year are gathered seed, and germination rate is more than 85%).
3, in illumination cultivation room, the cultivation of test material is carried out, temperature 25-30 DEG C.Choosing diameter is 15cm, is highly the vinyon basin alms bowl of 15cm.During test, rice paddy seed 20, often kind weed seed 30-40 grain is evenly put into basin earthing 0.5cm, put into greenhouse and cultivate (25-30 DEG C), the required moisture of growth between rice seedlings and weeds culture period, should be supplemented.Stay the seedling of 10 strain stalwartnesses after all sprouting, grow to dispenser process when 3-4 leaves and weeds grow to 2-5 until rice seedlings.With the regular moisturizing of the mode of top-watered (not watering in 2 days after medicine), keep soil moisture.
4, reagent agent: the former medicine of 98% penoxsuam (The Dow Agrosciences, LLC.); The 95% triazole acyl grass former medicine of amine (providing for oneself).Take quantitative former medicine with electronic balance, add appropriate emulsifier, with acetone solution, finally with the Tween 80 aqueous solution of 0.1%, above-mentioned former medicine is diluted to desired concn.
5, application method: in paddy rice 3 leaf phase, weeds 2-4 leaf phase cauline leaf spraying process.Spray medicine adopts the indoor crown-block type atomizing tester of adjustable speed, simulation field conventional spraying methods.Shower nozzle is Fan spray head, and model is Teejer8002E type, spray value 40 kgs/acre.Spray height 0.5 meter, spraying swath 0.7 meter, leg speed 0.224 meter per second.Atomisation pressure 2.0 MPa, flow 697 liters/min.Test and carry out reagent spray process in the paddy rice 3 leaf phase, dispenser 1 time.
6, investigation and computational methods:
After dispenser, investigate each process paddy rice with or without symptom of chemical damage, if having, record symptom of chemical damage, grade in detail, after medicine 20 days, measure each process paddy rice fresh weight, calculate fresh weight inhibition, with the safety of clear and definite test medicine to paddy rice.
The damage symptoms (as growth inhibition, chlorosis, deformity etc.) of detailed record weeds after dispenser, after medicine 20 days, weighs each process weeds acrial part fresh weight, the fresh weight preventive effect of calculating weeds.
Regression analysis is carried out, dosage ED when calculating correlation coefficient and suppress crop 10% by the probability value of DPS software to the logarithm value of drug dose and paddy rice fresh weight inhibition
10, and dosage ED during suppression weeds 90%
90, obtain selectivity index.Wherein, selectivity index=ED
10/ ED
90.
7, results and analysis:
The process of penoxsuam triazole acyl grass amine cauline leaf is to the safety of paddy rice:
Safety evaluatio standard, in table 4, is observed for after dispenser 3 days, and penoxsuam triazole acyl grass amine high concentration 1600mg/kg process indivedual paddy rice lobus cardiacus has slight jaundice, and growth is subject to slight suppression, and other concentration process paddy growth is normal; 7-12 days after dispenser, low concentration process paddy rice growing way is normal, and paddy rice also slowly recovers in 1600mg/kg process.
Table 4 activity of weeding and crop safety ocular estimate evaluation criterion
After dispenser 20 days, 60% penoxsuam triazole acyl grass amine water dispersible granules (60% refers to that penoxsuam and the careless amine of triazole acyl two kinds of active components account for the percentage of gross weight) to the inhibitory action of paddy rice in table 5.
Table 5 60% penoxsuam triazole acyl grass amine water dispersible granules is to the inhibitory action of paddy rice
Table 6 is after dispenser 20 days, and 60% penoxsuam triazole acyl grass amine water dispersible granules (60% refers to that penoxsuam and the careless amine of triazole acyl two kinds of active components account for the percentage of gross weight) is to the toxic action situation of weeds and preventive effect.
Table 6 60% penoxsuam triazole acyl grass amine water dispersible granules is to the fresh weight preventive effect of weeds
This medicament is to the toxic action situation of weeds and preventive effect as shown in Table 6, by formulae discovery its each virulence regression equation, LD
50, list in table 7.
Table 7 virulence regression equation and LD
50
| Process | Regression equation | Correlation coefficient | LD 50 | 95% confidence interval |
| A | Y＝0.5743+2.3745x | 0.9927 | 73.0885 | 63.4344～84.2118 |
As shown in Table 7: the LD of 63% penoxsuam triazole acyl grass amine water dispersible granules
50for: 73.0885,95% confidence interval is 63.4344-84.2118.
The process of penoxsuam triazole acyl grass amine cauline leaf is to the selectivity index of paddy rice and weeds: by table 5, table 6, tried to achieve the ED suppressing paddy growth 10% by DPS software
10=1968.0878, suppress the ED of weed growth 90%
90=253.2570, selectivity factor is 1968.0878/253.2570=7.77>2, thinks that this medicament has obvious selectivity, can carry out field control effectiveness test.
8, overall merit: this result of the test shows, penoxsuam triazole acyl grass amine cauline leaf process high concentration (4 times of recommended dose high dose) process can cause paddy rice yellow to paddy rice, and other concentration process (recommended dose high dose and times amount thereof) paddy growth is normal.Known by Toxicity Determination, penoxsuam triazole acyl grass amine paddy rice has good safety, has good control efficiency to weeds.
Embodiment 6
The field control effectiveness test of penoxsuam triazole acyl grass amine complex weedicide:
Shown by the field control effectiveness test of 2 years, the rice striking root phase before the winter, weeds 2-5 leaf does not wait the phase, 18% penoxsuam triazole acyl grass amine of the present invention (2% penoxsuam+16% triazole acyl grass amine) is utilized to dispersible oil-suspending agent (OF), dosage 80,90,100,180 milliliters/mu, is watered 40 kgs/acre and sprays, 15,40 days and maturing stage range estimation Security of rice and Weed-control effect, 15, within 40 days, survey all preventive effects, result is as following table 8:
Table 8
Note: in table 8, in blank, each data are weeds strain number (strain), and other each experimental group number is according to being strain preventive effect (%).
By range estimation, paddy rice has no symptom of chemical damage from dispenser to maturing stage, to rice safety.18% penoxsuam triazole acyl grass amine OF, 80 milliliters of/mu preventive effects to weeds, within 10 days, reach more than 80%, within 40 days, reach more than 92%, along with the increase of dosage, preventive effect obviously strengthens, and can have good herbicidal effect paddy field 80 milliliters/mu to weeds, and is used alone wherein a kind of active ingredient and compares, expand herbicide spectrum, to grassy weed and broad leaved weed, there is obvious synergistic effect.A dispenser can control the weeds in crop whole vegetative period, and not only herbicidal effect is remarkable, and environmentally friendly, on second stubble crop without impact, little to the pollution of environment, to people, animal, birds and beneficial organism safety, is conducive to keeping ecological balance.In addition, weed killer herbicide of the present invention adopts physical method processing, and production technology is simple, and three-waste free discharge in production process, has no adverse effects to ecotope.It is the desirable complex weedicide of current control efficiency.
Claims (5)
1. a paddy rice post-emergence complex weedicide, it is characterized in that: include penoxsuam and triazole acyl grass amine, the mass percentage of penoxsuam and triazole acyl grass amine is 0.1-85% of described paddy rice post-emergence complex weedicide total amount, wherein, the weight ratio of penoxsuam and triazole acyl grass amine is 1.2-3:10-24.
2. a kind of paddy rice post-emergence complex weedicide according to claim 1, it is characterized in that: in described paddy rice post-emergence complex weedicide, also include dispersant, wetting agent, disintegrant, binding agent and reagent carrier, wherein, the percentage by weight of dispersant, wetting agent, disintegrant and binding agent is 0.1-10%; 0.1-10%; 0.1-20%; 0.1-20%, reagent carrier supplies 100%.
3. a kind of paddy rice post-emergence complex weedicide according to claim 1, is characterized in that: the weight ratio of described penoxsuam and triazole acyl grass amine is 1.6-2.4:12-20.
4. a kind of paddy rice post-emergence complex weedicide according to claim 3, is characterized in that: the weight ratio of described penoxsuam and triazole acyl grass amine is 2:16.
5. a kind of paddy rice post-emergence complex weedicide according to any one of claim 1-4, is characterized in that: the formulation of described paddy rice post-emergence complex weedicide is for dispersibling oil-suspending agent, granule, wetting powder, water dispersible granules, missible oil, aqueous emulsion, microemulsion or suspending agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106982848A (en) * | 2017-05-27 | 2017-07-28 | 北京科发伟业农药技术中心 | A kind of Herbicidal combinations containing pyraclonil and three azole amides |
| CN108849957A (en) * | 2018-08-24 | 2018-11-23 | 安徽丰乐农化有限责任公司 | A kind of rice post-emergence complex weedicide containing three azole amides and benthiocarb |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106982848A (en) * | 2017-05-27 | 2017-07-28 | 北京科发伟业农药技术中心 | A kind of Herbicidal combinations containing pyraclonil and three azole amides |
| CN108849957A (en) * | 2018-08-24 | 2018-11-23 | 安徽丰乐农化有限责任公司 | A kind of rice post-emergence complex weedicide containing three azole amides and benthiocarb |
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| CN104770385B (en) | 2016-10-12 |
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