CN104522020A - Three-element compounding agent namely bensulfuron methyl.pretilachlor.pendimethalin for preventing and removing drought direct sowing rice field weeds - Google Patents
Three-element compounding agent namely bensulfuron methyl.pretilachlor.pendimethalin for preventing and removing drought direct sowing rice field weeds Download PDFInfo
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Abstract
The invention discloses a three-element compounding agent namely bensulfuron methyl.pretilachlor.pendimethalin for preventing and removing drought direct sowing rice field weeds. The three-element compounding agent is characterized by being prepared by taking bensulfuron methyl, pretilachlor and pendimethalin as active ingredients and then adding a safener namely fenclorim. The mixing ratio of bensulfuron methyl to pretilachlor to pendimethalin is (7.5-60):(75-600):(30-240) (ga.i./ha), the ratio of pretilachlor to the safener namely fenclorim in the compounding agent is (3:1)-(3:2), the application time of the compounding agent is 3-5 days after sowing cultivated rice, the field recommended dosage is 337.5-562.5ga.i./ha, and excess water should be avoided in 24 hours after application, otherwise, pesticide hazards are caused to the cultivated rice. The three-element compounding agent disclosed by the invention can be used for greatly expanding the weed control spectrum, reducing the number of application and the quantity of work, reducing the weeding cost, improving the economic benefit, reducing the pesticide hazards, improving the safety and relieving the drug resistance of weeds.
Description
Technical field
What the present invention relates to is a kind of careless amine pendimethalin of ternary built agent bensulfuron-methyl third preventing and kill off dry direct-seeding rice field weed.
Background technology
Direct sowing on dry paddy field is sown in the soil behind whole ground by sower by the rice paddy seed after process, eliminate technical process numerous and diverse in breeding, production process such as rice transplanting such as fortune seedling, rice transplanting etc., dramatically reduce the labour intensity of peasant, since the eighties in 20th century, China rural laborer flows to city in a large number, Direct-seeding Rice cultivation is more and more welcome by peasant, particularly the southeastern coast developed area such as Jiangsu-zhejiang Shanghai Area, and direct-sowing dry is cultivated and greatly reduced producing cost simultaneously.Direct-sowing dry cultivation is simultaneously conducive to saving water resource, the usual drowned rice field in rice transplanting field, and rice at whole growth periods water consumption can reach (1000 ~ 1200) m
3/ 667m
2, and direct-sowing dry rice seedlings drought period, is long, makes full use of natural precipitation, just tillering, booting, heading and grouting 4 takes the intermittent irrigation of short time period, water consumption is (300 ~ 400) m about
3/ 667m
2the availability of water improves more than 3 times, therefore in the world many countries and regions all in this culture technique of large-area employing, wherein the area of Italian direct sowing on dry paddy field accounts for 98% of the total sowing area of paddy rice, Australia accounts for 33%, under these advantages, the planting patterns of direct sowing on dry paddy field is more and more by the welcome of peasant.
Although direct-sowing dry field has many good qualities, on weeds occurrence injury, direct-sowing dry field is obviously more serious than the rice field of other planting types many.Investigation shows that dry seeded rice field weeds reach 14 section 29 kinds, mainly contain barnyard grass, moleplant seed, lady's-grass, Weedy Rice, Monochoria vaginalis, ear leaf water amaranth, Herba Cyperi Glomerati, Procumbent Falsepimpernel etc., especially with malignant weeds such as barnyard grass, moleplant seed, lady's-grass, nutgrass flatsedge, Monochoria vaginalis, long-term naturally-occurring amount is large, harm is heavy, reaches 550 strains/m
2above, endanger heavy up to 1000 strains/m
2, be 5 ~ 10 times of rice shoot, high reaches 20 times.In recent years, the generation of dry direct-seeding rice field weed obviously increases the weight of for main with barnyard grass, moleplant seed, and particularly the harm that causes at dry seeded rice field as lady's-grass, eleusine indica of the raw weeds of some droughts is more and more serious.And along with herbicide resistance is more and more serious, the composite of medicament seems more and more important.
Bensulfuron-methyl is selectivity inner sucting conduction type sulfonylurea herbicide, and active ingredient can spread rapidly in water, transfers to each portion of weeds, stop division and the growth of cell for weeds root and blade absorb.Susceptible weeds GF is obstructed, and tender tissue turns to be yellow too early and suppresses the growth of leaf portion, hinders root growth and downright bad.Good preventive effect is had to broad-leaved class and cyperus weeds.It is harmless inert chemi-cal thing that active ingredient enters rapid metabolization in paddy rice body, to rice safety.Third careless amine is chloroacetanilide herbicides, has good control effect to the grassy weed in paddy field, and has certain preventive effect to part annual broad-leaved class and nutgrass flatsedge.Pendimethalin is dinitroaniline herbicide, has good preventive effect to annual gramineous weed, and has certain inhibitory action to part broad leaved weeds.Bensulfuron-methyl third careless amine pendimethalin built agent, as processing soil treatment agent, can prevent and treat grass family, broad-leaved class and nutgrass flatsedge in direct sowing rice field morning effectively, expands herbicide spectrum greatly.But due to the homology similitude of cultivated rice and Weedy Rice, the third careless amine is preventing and kill off the Weedy Rice of direct-sowing rice, usually poisoning is being produced to cultivated rice.Therefore need in built agent, add safener fenclorim and carry out conserving culture rice not by poisoning.Like this, the application of built agent reach safer, more save trouble, more efficient object.
Summary of the invention
The object of the invention is to find a kind of safe, efficient, broad weed-killing spectrum, cost-saving and reduce ternary built agent---the careless amine pendimethalin of bensulfuron-methyl third that labour etc. uses at dry seeded rice field.
The present invention is achieved through the following technical solutions above-mentioned purpose:
For composite medicament, bensulfuron-methyl, the third careless amine and pendimethalin, for preventing and kill off grass family, the weeds such as broad-leaved class and cyperus of dry seeded rice field.In built agent, add safener fenclorim, be used for the poisoning of conserving culture rice from the third careless amine.
Direct-sowing dry field weed control technology, comprises the steps: by cultivated rice planting seed in rice field, and upper horse race water is moistening by field, and after after planting 3-5 days, built agent is with the usage amount of 337.5 ~ 450g a.i./ha, and soil spraying processes
In order to avoid the generation of poisoning, after spray medicine, in 24h, ponding can not be had.
Compared with existing direct-sowing dry field weed control technology, the present invention has following advantage:
(1) greatly can expand herbicide spectrum, have good preventive effect to weeds such as broad-leaved class, grass family and cyperus.
(2) decrease times for spraying and the amount of labour, reduce weeding cost and improve economic benefit, direct-sowing dry Tanaka only needs a dispenser just can control all weeds in field early stage.
(3) can reduce poisoning, improve safety and alleviate herbicide resistance, in built agent, the consumption of three kinds of medicaments is all lower than the field recommended dose of itself.
Embodiment
Implement the careless amine pendimethalin application test of built agent bensulfuron-methyl third:
Tested year October in May, 2014 to 2014, carry out at Agricultural University Of Nanjing's weed killer herbicide toxicity and pesticide resistance Laboratory Temperature indoor.
1, reagent agent: the former medicine of 95% bensulfuron-methyl (Jiangsu Reher Chemical Co., Ltd.)
The 95% the third former medicines of careless amine (Jiangsu Changqing Agricultural Chemistry Co., Ltd.)
The former medicine of 92% pendimethalin (Xing Nong pharmaceutcal corporation, Ltd)
The former medicine of 85% fenclorim (Su Ke agrochemical Co., Ltd of Jiangsu Province)
Test plant:
Raise rice No. 6 (long-grained nonglutinous rice)
Nasal mucus rice No. 11 (japonica rice)
Sweet wine intestines (being collected in Xie Jia town, Gaoyou City of Jiangsu Province for 2013)
Weedy Rice (being collected in syndrome in Ganyu County Lao Li family town for 2013)
Moleplant seed (being collected in syndrome in Ganyu County Song Zhuan in 2012)
Lady's-grass (being collected in Nanjing decorated archway in 2012)
Cyperus iria (being collected in Nanjing decorated archway in 2012)
Barnyard grass (being collected in Nanjing decorated archway in 2012)
2 experimental scheme and method
2.1 Preliminary screening compound proportions
Combine after evaluating three kinds of composite reagents according to Colby method and press down grass effect, the dose gradient arranging bensulfuron-methyl is 7.5 (A1), 15 (A2), 30 (A3), 60 (A4) g a.i./ha (single dose field recommended dose 30 ~ 45g a.i./ha); Third careless amine dose gradient is 75 (B1), 150 (B2), 300 (B3), 600 (B4) g a.i/ha (single dose field recommended dose 450g a.i./ha); The dose gradient of pendimethalin is 30 (C1), 60 (C2), 120 (C3), 240 (C4) g a.i./ha (single dose field recommended dose 135 ~-165g a.i./ha), each processes the group arrangement of random district above, totally 64 process.Three kinds of medicaments respectively do a process respectively by above-mentioned dose gradient, and each medicament arranges 1 clear water contrast, totally 15 process.Altogether need so composite to do 79 process, each process repetition 4 times.The sweet wine intestines representative of direct-sowing dry paddy field broad leaved weeds, grass family class weeds barnyard grass represents.
A certain amount of acetone solution first used by former medicine, is made into 20000 μ g/mL mother liquors, with the distilled water diluting containing 0.1% Tween 80 during use.
In the basin of diameter 11cm, high 5cm, the in-built 80g that bankets of basin, adds water to completely moistening, and 20 seeds broadcast by every basin, covers shallow soil (sweet wine intestines not earthing) after broadcasting.Soil spraying process is carried out, the amount of being watered 100mL/m by test setting dosage
2.Put into illumination box after process to grow, daytime 30 DEG C, night 25 DEG C, periodicity of illumination 12: 12 (D: L).The 3WPSH-500D type that spraying adopts Nanjing Agriculturing Mechanization Inst., Ministry of Agriculture to produce is raw surveys spray tower, disk diameter 50cm, main axis speed 6 turns of min
-1, shower nozzle aperture 0.3mm, atomisation pressure 0.3MPa, fogdrop diameter 100 μm, capacity of sprinkler 90mLmin
-1.
The determination of 2.2 composite optimum proportioning
According to the composite proportioning that experimental scheme 2.1 filters out, carry out testing the preventive effect of other weeds, selection have moleplant seed, lady's-grass, Weedy Rice, cyperus iria, according to the preventive effect of final all weeds in conjunction with composite principle determination optimum proportioning for examination weeds.Test method is with 2.1.
The determination of safener additional proportion in 2.3 built agents
In composite, contain the third careless amine, do not have third of safener the careless amine can produce poisoning to cultivated rice, add safener fenclorim to the protective effect of cultivated rice so need to do further.According to the optimum compound proportion example that the experimental result of experimental scheme 2.2 integrated control effect is determined, determine the dosage that in built agent, safener fenclorim adds.On current pesticide market, existing product is swept in Fluorene spy, and adding the ratio of safener is the third careless amine: fenclorim=3: 1, and the ratio setting that fenclorim in test is added is the third careless amine: fenclorim=6: 1,3: 1,3: 2,1: 1, CK1
(laxative), CK.Respectively japonica rice and long-grained nonglutinous rice are tested, experimentally result determination best safety ratio.Test method is with 2.1.
The selection of the 2.4 low middle high doses in built agent field
After determining the best safety ratio of fenclorim, carry out the test of pesticide effectiveness of composite basic, normal, high dosage again, for the field trial determination medicament using dosage scope of compound drug, test to moleplant seed, barnyard grass, Weedy Rice, long-grained nonglutinous rice, japonica rice, lady's-grass, sweet wine intestines, cyperus iria respectively, according to the virulence of each treatment dosage to weeds, determine field recommended dose scope.Test method is with 2.1.
2.5 simulation low temperature and waterlogging condition under built agent on the impact of cultivated rice
Simulation built agent is to the poisoning situation of cultivated rice under low temperature and waterlogging situation, the test dose maximum dose level of field recommended dose, fenclorim is added according to best safety ratio, test japonica rice and long-grained nonglutinous rice, low-temperature test is set to, and after dispenser, 0h, 24h, 48h put into day temperature 25 DEG C respectively, in the evening incubator of 20 DEG C, recover normal after placing 72h to cultivate, each process arranges contrast, and often 4 repetitions are established in process.Go up water respectively after damage or crop failure caused by waterlogging test is set to dispenser 0h, 24h, 48h, the degree of depth of water layer is advisable to flood soil layer, and recover normal after keeping 72h and cultivate, each process arranges contrast, and test method is with 2.1.
2.6 built agents are to the safety of cultivated rice
Carry out safety testing to cultivated rice long-grained nonglutinous rice type and japonica rice type respectively with ternary built dosage A1+B1+C1, A2+B2+C2, A3+B3+C3, A4+B4+C4, each concentration is carried out 4 times and is repeated, and test method is with 2.1.
3 investigation methods and data processing
After medication 20 days, the fresh weight of barnyard grass, sweet wine intestines acrial part in each basin of investigation records, after calculating barnyard grass, sweet wine intestines and this two kinds of overall medications of weeds respectively, fresh weight accounts for the percentage of contrast fresh weight on the ground, the theoretical fresh weight ratio of built agent is calculated again by the actual measurement fresh weight ratiometer of single dose pendimethalin, the third careless amine and bensulfuron-methyl, the ratio of theoretical fresh weight is evaluated compared with the actual measurement fresh weight ratio of built agent the type of combining and pressing down grass, the computing formula of theoretical fresh weight preventive effect is:
Wherein E0 be weed killer herbicide pendimethalin, the third careless amine and bensulfuron-methyl composite after theoretical preventive effect, A be weed killer herbicide pendimethalin alone time weeds fresh weights be the percentage of contrast fresh weight, B be herbicide pretilachlor alone time weeds fresh weights be the percentage of contrast fresh weight, C be Bensulfuron-methyl alone time weeds fresh weights be the percentage of contrast fresh weight, n is the number of compound drug.If E be composite after actual measurement fresh weight be contrast percentage, be antagonism when E0-E≤-10%, E0-E >=10% is synergistic effect, is summation action when-10%≤E0-E >=10%.
The data processing of Security of rice, test data carries out statistical analysis through DPS data processing software, calculates the comprehensive ED suppressing weeds
90, paddy rice ED
10and 95% confidence interval (during calculating being added the active ingredient of two kinds of medicaments as the active ingredient amount under this treatment dosage), and calculate selectivity index Z.As Z<2, illustrate that medicament is dangerous to crop, when 2≤Z≤4, illustrate that medicament is safe to crop under certain condition, as Z>4, illustrate that medicament is safe to crop.
4 results and analysis
4.1 Preliminary screening compound proportions
As can be seen from Table 1, bensulfuron-methyl, the third careless amine and the composite increase along with three's dosage of pendimethalin three, also increase the fresh weight inhibition of sweet wine intestines and barnyard grass.The E-E0 value of bensulfuron-methyl third careless amine pendimethalin ternary built to sweet wine intestines is all greater than-10%, the i.e. effect of addition or synergy, because the third careless amine and pendimethalin also have certain inhibitory action to annual broadleaf weed, so composite obvious to the synergistic effect of sweet wine intestines.Ternary built is to the E-E0 value of barnyard grass except A1+B2+C3 shows as antagonism, and all the other major parts all show as addition or synergistic effect.
Expand herbicide spectrum according to table 1 and mixture of herbicides, reduce times for spraying, reduction weeding cost is increased economic efficiency, reduce poisoning raising safety, alleviate the principles such as the generation of herbicide resistance, finally determining five to sweet wine intestines and the good compound proportion of barnyard grass inhibition, is A2+B3+C3, A3+B3+C3, A4+B3+C3, A3+B2+C3, A3+B3+C2 respectively.
Table 1 built agent is to the inhibiting rate of sweet wine intestines, barnyard grass fresh weight and E-E0 value
The determination of 4.2 composite optimum proportioning
As can be seen from table 2 experimental result, composite than A3+B2+C3 to barnyard grass and lady's-grass preventive effect undesirable, composite more undesirable to lady's-grass preventive effect than A3+B3+C2, other three kinds composite compares A3+B3+C3, A4+B3+C3, A2+B3+C3 is to moleplant seed, barnyard grass, sweet wine intestines, the preventive effect of cyperus iria and lady's-grass is all more satisfactory, field recommended dose due to bensulfuron-methyl is 30-45g a.i./ha, the composite single dose additive capacity than bensulfuron-methyl in A4+B3+C3 is apparently higher than field recommended dose, compositely be only 1/3 ~ 1/2 of its field recommended dose than the additive capacity of bensulfuron-methyl in A2+B3+C3, and the main bensulfuron-methyl that relies on suppresses broad leaved weed and nutgrass flatsedge rate in built agent, so meeting composite reagent basic principle and ensureing on the basis of field efficacy, finally determine that composite optimum proportioning is A3+B3+C3.
The virulence of five kinds of all test plants of composite comparison of table 2 built agent
The determination of safener additional proportion in 4.3 built agents
The data display of table 3, be the third careless amine at safener fenclorim additional proportion: fenclorim=3: when 2, rice No. 6 (long-grained nonglutinous rices) is raised to cultivated rice and nasal mucus rice No. 11 (japonica rice) inhibiting rates are minimum, namely best to the safety of cultivated rice, therefore can draw, the optimal proportion that safener fenclorim adds is the third careless amine: fenclorim=3: 2.
The different additional proportion of table 3 safener is to the safety of cultivated rice
The selection of the 4.4 low middle high doses in built agent field
According to the optimum proportioning that 4.2 result of the tests obtain, low middle high dose is set to: low dosage is the careless amine+pendimethalin=22.5+225+90 (g a.i./ha) of bensulfuron-methyl+the third, middle dosage is the careless amine+pendimethalin=30+300+120 (g a.i./ha) of bensulfuron-methyl+the third, high dose is the careless amine+two of bensulfuron-methyl+the third. first penta spirit=37.5+375+150 (g a.i./ha), as can be drawn from Table 4, built agent when low middle high dose to weeds barnyard grass, sweet wine intestines, moleplant seed, the preventive effect of lady's-grass and cyperus iria is more or less the same, based on safety, cost-savingly to increase the benefit, the principles such as environmental pollution is little, determine that the recommended dose in field is that low dosage is to middle dosage, namely the field recommended dose of built agent is 337.5 ~ 450g a.i./ha.
The low middle high dose of table 4 built agent is to the inhibitory action of test plant
4.5 simulation low temperature and waterlogging condition under built agent on the impact of cultivated rice
According to the result of the field recommended dose that 4.4 obtain, under simulating low temperature and waterlogging condition with bensulfuron-methyl+the third careless amine+pendimethalin=30+300+120 (g a.i./ha) dosage, built agent is on the impact of cultivated rice.As can be seen from Table 5, occur that the inhibiting rate of ponding to long-grained nonglutinous rice and japonica rice is respectively 59.04% and 50.21% after administration immediately, more serious poisoning can be produced to cultivated rice, but after dispenser 24h, be safe substantially to cultivated rice.Occur low temperature condition in 48h after dispenser, built agent is safe to cultivated rice substantially, but also should avoid the appearance of low temperature as far as possible.Therefore can draw the generation must avoiding ponding in 24h after administration, avoid the impact of low temperature simultaneously as far as possible.
The composite poisoning factor to paddy rice of table 5 bensulfuron-methyl, the third careless amine and pendimethalin
4.6 built agents are to the safety of cultivated rice
As can be seen from table 6, table 7 and table 8, it is 6.36 and 4.77 that the safety index of built agent to cultivated rice long-grained nonglutinous rice type and japonica rice type is respectively, all be greater than 4, so bensulfuron-methyl third careless amine pendimethalin ternary built is safe to cultivated rice under the condition of adding safener fenclorim.
Inhibitory action to paddy rice fresh weight after table 6 bensulfuron-methyl, the third careless amine and pendimethalin process 30d
Inhibitory action to two kinds of weeds fresh weights after table 7 bensulfuron-methyl, the third careless amine and pendimethalin process 30d
Table 8 bensulfuron-methyl, the third careless amine and pendimethalin built agent are to the safety of dry seeded rice field
Claims (5)
1. prevent and kill off a ternary built agent for dry direct-seeding rice field weed, it is characterized in that utilizing bensulfuron-methyl, the third careless amine, pendimethalin three kinds of medicaments to carry out composite, then add safener fenclorim to prevent and kill off dry direct-seeding rice field weed.
2. direct-sowing dry field weed control technology according to claim 1, is characterized in that the proportioning of bensulfuron-methyl, the third careless amine and pendimethalin three kinds of medicaments is bensulfuron-methyl+the third careless amine+pendimethalin=(7.5 ~ 60)+(75 ~ 600)+(30 ~ 240) (g a.i./ha).
3. direct-sowing dry field weed control technology according to claim 1, is characterized in that the ratio that in the agent of bensulfuron-methyl third careless amine pendimethalin ternary built, safener fenclorim adds is the third careless amine: fenclorim=3: 1 ~ 3: 2.
4. direct-sowing dry field weed control technology according to claim 1, it is characterized in that the spraying time of built agent is cultivated rice after planting 3 ~ 5 days, field recommended dose is 337.5 ~ 562.5g a.i./ha.
5. direct-sowing dry field weed control technology according to claim 1, can not have ponding in 24h after it is characterized in that built agent dispenser, otherwise can produce poisoning to cultivated rice.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115336589A (en) * | 2022-08-19 | 2022-11-15 | 南通江山农药化工股份有限公司 | High-efficiency weeding composition for preventing and removing weeds in paddy fields and preparation thereof |
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| JPS6483003A (en) * | 1987-09-24 | 1989-03-28 | Nihon Nohyaku Co Ltd | Herbicidal composition for paddy field |
| CN102027942A (en) * | 2010-12-30 | 2011-04-27 | 苏州富美实植物保护剂有限公司 | Compounded herbicide composition for rice field |
| CN103907495A (en) * | 2014-04-23 | 2014-07-09 | 南京农业大学 | Technique for utilizing pretilachlor to prevent and remove weedy rice in water-direct-seeding rice field |
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2014
- 2014-12-08 CN CN201410756200.XA patent/CN104522020A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6483003A (en) * | 1987-09-24 | 1989-03-28 | Nihon Nohyaku Co Ltd | Herbicidal composition for paddy field |
| CN102027942A (en) * | 2010-12-30 | 2011-04-27 | 苏州富美实植物保护剂有限公司 | Compounded herbicide composition for rice field |
| CN103907495A (en) * | 2014-04-23 | 2014-07-09 | 南京农业大学 | Technique for utilizing pretilachlor to prevent and remove weedy rice in water-direct-seeding rice field |
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| CN115336589A (en) * | 2022-08-19 | 2022-11-15 | 南通江山农药化工股份有限公司 | High-efficiency weeding composition for preventing and removing weeds in paddy fields and preparation thereof |
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