CN104686550A - Mixed herbicide containing flazasulfuron and trifluralin - Google Patents

Abstract

The invention discloses a mixed herbicide containing flazasulfuron and trifluralin. The herbicide uses flazasulfuron and trifluralin as main effective components, wherein the mass ratio of flazasulfuron to trifluralin is 1-80: 1-80. The mixed herbicide of the invention has significant effects on lawn weeding, specifically on control of various Gramineae, Cyperaceae and broadleaf weeds of lawn. Compared with a single agent, on the premise of improvement of herbicide effects, the herbicide of the invention has the advantages of delaying of weed resistance, wide weeding spectrum, long duration and safety to the lawn.

Description

A kind of mixed herbicide containing flazasulfuron and trefanocide

Technical field

The invention belongs to technical field of pesticide, relate to a kind of weed killer herbicide, be specifically related to the two end number mixing built agent of a kind of flazasulfuron and trefanocide, this herbicidal composition can be applicable to before the seedling of lawn or early stage weeding after seedling.

Background technology

Along with the quickening of Urbanization in China, the lifting of urban afforestation standard and increasing substantially of urban size, arising at the historic moment in various lawn, has caused the great demand to lawn, and Development of Turf has good business opportunity., aesthetic firm in infrastructure such as guarantee highway, railway, airport, reservoir, riverbank, Hu Di, lawn is important auxiliary equipment; In urban construction, afforestation, can better people's living environment greatly in lawn, effectively reduce " tropical island effect " in city.The area of green grassland, quality reflect The Surroundings in Cities quality and civilization degree.Some developed countries as the city of the U.S., European Union especially using Lawn Industry as one of national pillar industry.At present, the Lawn Industry of China has large development, but not yet forms complete integrated industrial system.Lawn is beautified and is improved in China's urban construction, living environment in the spiritual civilization level of the people and plays key player, and it not only has very high economic benefit, and has huge ecological benefits and social benefit.

But, because management is improper, there is Quality Down in a lot of lawn, the problems such as turfgrass is dead, weedy, damage by disease and insect occur again and again, the use value on serious reduction lawn and landscape value, cause a large amount of fund wastes, so research turf management technology, especially Kill weeds technology is the important measures changing lawn present situation and improve ecotope.

Artificial weeding, throwing work is large, weeding is thorough, has the disadvantage of trampleing on lawn, thus reduces turf quality.Some places have to change lawn, costly.Chemical weed control saving of work and time, low-cost high-efficiency, later stage weeds generating capacity is few, and this is that artificial uprooting weed institute can not be than.And chemical weed control also has sealing process, the weeds later newly gone out want much less.Chemical weed control is few to lawn interference, for Turfgrass Growth provides rational environment.Weeding expense is low, and an expense is the l/3-l/4 of labour cost, and the expense of a year is the 1/4-1/5 of labour cost.Labour intensity is low, and a people can spray 7-9 mu lawn every day, and machine nebulization efficiency is higher, has large area weeding advantage.In order to reduce the economic loss that crop smothering causes, reduce labor intensity, simultaneously also because chemical weed control is convenient, quick-acting, the control time is long, chemical weed control is gradually by people are accepted.

Flazasulfuron (flazasulfuron) is the sulfonylurea herbicide being originated in the exploitation of industry chemical company by Japanese stone.Chemical name 1-(4,6-dimethoxypyridin-2-base)-3-(3-trifluoromethyl-2-pyridine sulfonyl sulfonyl) urea, its structural formula is as follows:

Acetolactate synthestase (ALS) inhibitor.The main reaction suppressing the predecessor acetolactate synthestase producing side chain amino acid, leucine, isoleucine and valine.This medicament broad weed-killing spectrum, annual broad-leaved and grassy weed in Weeds in Turf that can not only be fabulous, and perennial broadleaf weed and sedge weed can also be prevented and kill off, as lady's-grass, barnyard grass, eleusine indica, annual bluegrass, amur foxtail, green foxtail, the rhizome of nutgrass flatsedge, kyllinga brevifolia, cyperus iria, difformed galingale herb, alternanthera philoxeroides, Horseweed Herb, white clover, it is recklessly appropriate, Tufted Cerastium, creeping oxalis, hairy tare, pale reddish brown order place, clover, pale persicaria, sheep hoof, class humid euphorbia, greater plantain, argy wormwood, sweet vernal grass, green amaranth, shepherd's purse, chickweed etc., to short leaf kyllinga brevifolia, lady's-grass and rhizome of nutgrass flatsedge preventive effect splendid.

Generally, process after weeds stop growing immediately, absorbs the leaf chlorisis newly sent afterwards for 4-5 days, then gradually necrosis and spread to whole plant 20-30 days weeds thoroughly withered.This medicament absorbs by weeds cauline leaf, and can suppress suppressing weed seed germination in soil again, the control time is longer, and the lasting period is about more than 40 days in spring and summer, and autumn and winter is more than 120 days.

Flazasulfuron is the herbicides special that first, China is formally registered on warm-season turf (Korea lawn grass class and Bermuda grass class).Can rapidly medicament be decomposed, be converted into innocuous substance after Korea lawn grass contacts medicament with Bermuda grass class turfgrass, the normal growth on lawn can not be affected, high to turfgrass safety.Use in lawn resting stage, germination in the future and growth can not be affected.Be widely used in greening lawn, golf course etc.

Trefanocide (Trifluralin) is the phenyl amines weed killer herbicide developed by Dow AgroSciences.Chemical name: 2,6-dinitro-N, N-diη-propyl-4-5-trifluoromethylaniline.Its structural formula is as follows:

Be processing soil treatment agent before selectivity bud, suppress microtubule system.Trefanocide passes in soil layer process absorbed by weed seed at germinating growth, and mainly absorbed by with the bud scale of gramineous plants, the hypocotyl of broad leaved plant, cotyledon and young root also can absorb, but little to bud and the conduction of other organs after absorbing.After emerging, the stem of plant and leaf can not absorb.Enter in plant corpus the generation or transmission that affects hormone and cause its death.Mainly prevent and kill off the broad leaved weed of grassy weed and part small-sized seed, as careless in barnyard grass, lady's-grass, eleusine indica, moleplant seed, eragrostis cilianensisLink, annual bluegrass, bromegrass, hard grass, caput, amaranth, lamb's-quarters, kitchen garden, chickweed, Liao, pivot store, puncture vine etc.Lasting period is long.Volatile, easy photodissociation, aqueous solvent are minimum, not easily move in soil layer.

Current lawn herbicide limit by lawn safety, herbicide spectrum is also limited, be used alone the generation that a kind of weed killer herbicide single dose can not control turf weed completely effectively, moreover some weed killer herbicide is due to water-soluble large or the lasting period is oversize, consumption is excessive or the uneven residual hazard all easily caused lawn of dispenser.Therefore, it is different that the present invention selects herbicide to compose, and is made into mixture and uses, so both expand herbicide and compose after the flazasulfuron of pluses and minuses complementation and trefanocide two kinds of suitable decrements of weed killer herbicide, significantly improve herbicidal effect, it also avoid possibility lawn being produced to poisoning and residual hazard.

Summary of the invention

The object of this invention is to provide a kind of mixed herbicide containing flazasulfuron and trefanocide.

Another object of the present invention is to provide the application of this weed killer herbicide before the seedling of lawn, in postemergence weed control.

Containing a mixed herbicide for flazasulfuron and trefanocide, it is characterized in that this weed killer herbicide with flazasulfuron and trefanocide for principle active component, the mass ratio of flazasulfuron and trefanocide is 1 ~ 80:1 ~ 80.The mass ratio of preferred flazasulfuron and trefanocide is 1:1 ~ 20, and preferably the mass ratio of flazasulfuron and trefanocide is 1:1 ~ 10 further, and most preferably the mass ratio of flazasulfuron and trefanocide is 1:1 ~ 7.

In mixed herbicide, both flazasulfuron and the trefanocide mass percentage in weed killer herbicide is 1 ~ 85%, and preferred mass percentage composition is 10 ~ 45%.

In the binary built preparation of flazasulfuron of the present invention and trefanocide, except the active ingredient such as flazasulfuron and trefanocide, the auxiliary agents such as conventional surfactants, thickener, solvent or the solid packing that pesticidal preparations allows can also be added and be mixed with any one formulation that agricultural chemicals allows.Preferably be processed into suspending agent, wetting powder, water dispersion granule, missible oil, microcapsule formulations.

Mixed herbicide of the present invention can be applied before turf weed seedling or in postemergence weed control, and particularly in Weeds in Turf, in various grass family, sedge family and broad leaved weed, application has remarkable result.

Herbicidal composition of the present invention has the following advantages:

1, activity of weeding is high.Flazasulfuron absorbs mainly through root and stem and is sent to meristematic tissue by conducting tissue, suppresses the biosynthesis of branched-chain amino acid (as serine, isoleucine).Trefanocide mainly suppresses microtubule system, passes in soil layer process absorbed by weed seed at germinating growth.That is, herbicidal composition of the present invention can kill weeds by two kinds of different approaches, greatly can improve the removing activity of weed killer herbicide.

2, herbicidal spectrum is wide, and the lasting period is long.Flazasulfuron is broad spectrum weeding agent, mainly effective to annual broad-leaved and grassy weed, can also prevent and kill off perennial broadleaf weed and sedge weed, soil and foliage application.Trefanocide is processing soil treatment agent before selectivity bud, suppresses microtubule system.Mainly prevent and kill off the broad leaved weed of grassy weed and part small-sized seed.So weed killer herbicide of the present invention has the double action in leaf surface treatment and feud, extend the lasting period of medicament.After both mixing, action compensating, herbicidal spectrum is wider.

3, Weed Resistance is delayed.Because weeds easily produce resistance to sulfonylurea herbicide, and containing phenyl amines herbicide trifluralin in weed killer herbicide of the present invention, enable medicament effectively prevent and kill off the weeds of anti-sulfonylurea, in addition, reduce resistance weed, extend the service life of medicament.

4, safety is high.Herbicidal composition of the present invention, is applied to Kill weeds, and it can various grass family, sedge family and broad leaved weed in Weeds in Turf, under the prerequisite that improve drug effect, has safety to lawn.

Therefore, mixed herbicide of the present invention can be applied in the weed killer herbicide preparing Kill weeds, particularly applies in various grass family, sedge family and broad leaved weed in Weeds in Turf.

Embodiment

Embodiment 1

Flazasulfuron 1%, trefanocide 19%, alkylphenol polyoxyethylene 4%, the rare block compound 5% of polyoxyethylene polyoxy third, thickener 2%, vegetable oil to 100%, formulation method is conveniently mixed with the suspending agent that mass percentage is 20%.

Embodiment 2

Flazasulfuron 3%, trefanocide 27%, NNO(di-2-ethylhexylphosphine oxide bitter edible plant sodium sulfonate) 9%, alkylphenol polyoxyethylene 5%, sodium lignin sulfonate to 100%, formulation method is conveniently mixed with the microcapsule formulations that mass percentage is 30%.

Embodiment 3

Flazasulfuron 5%, trefanocide 5%, sodium lignin sulfonate 7%, neopelex 5%, ammonium sulfate 5%, diatomite supplies 100%, and formulation method is conveniently mixed with the water dispersion granule that mass percentage is 10%.

Embodiment 4

Flazasulfuron 10%, trefanocide 35%, NNO(di-2-ethylhexylphosphine oxide bitter edible plant sodium sulfonate) 6%, sodium lignin sulfonate 5%, white carbon 9%, kaolin supplies 100%, and formulation method is conveniently mixed with the wetting powder that mass percentage is 45%.

Embodiment 5

Flazasulfuron 70%, trefanocide 10%, NNO(di-2-ethylhexylphosphine oxide bitter edible plant sodium sulfonate) 6%, sodium lignin sulfonate 4%, white carbon 9%, kaolin supplies 100%, and formulation method is conveniently mixed with the wetting powder that mass percentage is 80%.

Embodiment 6

Flazasulfuron 10%, trefanocide 60%, NNO(di-2-ethylhexylphosphine oxide bitter edible plant sodium sulfonate) 9%, alkylphenol polyoxyethylene 5%, sodium lignin sulfonate to 100%, formulation method is conveniently mixed with the missible oil that mass percentage is 70%.

Embodiment 7

1), toxicity determination test

Utilize the preparation in embodiment 1 ~ 4, measure its co-toxicity coefficient to lawn common weed barnyard grass.

Test method: be seeded in respectively in the Disposable paper cup of 9cm by the seed of quantitative barnyard grass, sows 10 ~ 15 seeds in every glass, cultivates in illumination box, when barnyard grass 3 ~ 6 leaf phase, does composition spray to carry out spraying process in crawler type.Continue in greenhouse after process to cultivate, routine observation respectively processes the preventive effect to weeds, weighs the weeds fresh weight after each process after 30d, and the method proposed by nineteen sixties such as Sun Yunpei, calculates its toxicity regression curve and co-toxicity coefficient.Co-toxicity coefficient is greater than 120, and show that two kinds of active principles have synergistic effect, co-toxicity coefficient is less than 120, shows that two kinds of active principles have antagonism.Measurement result is as shown in table 1.

Table 1 toxicity measurement result

As can be seen from the above table, the co-toxicity coefficient after two kinds of active principles are composite is all greater than 120, illustrates that the present invention has obvious synergistic effect.

2), field control effectiveness test

Reagent agent:

4 kinds of re-compounded binary herbicides in embodiment 1 ~ 4.

Contrast medicament:

25% flazasulfuron water dispersible granules (commercially available), 48% trifluralin ec (commercially available).

For examination lawn: Bermuda grass

Bermuda grass seedling was 3 ~ 5 leaf phases, grew fine, robust plant, without other damage by disease and insect.

Prevent and kill off object:

The turf weed such as lady's-grass, barnyard grass, eleusine indica, annual bluegrass, amur foxtail, green foxtail, chickweed, summer cypress, nutgrass flatsedge, benbie, the rhizome of nutgrass flatsedge, kyllinga brevifolia, cyperus iria, difformed galingale herb, shepherd's purse.

Test method:

According to the area of experimental plot, the good various medicament of precise, and after being watered dilution, utilize knapsack sprayer, carry out even spraying, the Fan spray head that sprinkler selection weed killer herbicide is special.During spraying, liquid be noted evenly to spray application in experimental plot, accomplish the phenomenon not having drain spray, many sprays.

After test, after medicine, 20d, 40d observe weeds death condition respectively, and the activity of weeding of more various medicament.In addition, after medicine, the growing state on lawn also in 1 ~ 15d, to be observed, whether have poisoning to investigate medicament to lawn.

Embodiments of the invention preparation Herbicidal Testing Trials effect sees the following form 20d after 2(medicine) and table 3(medicine after 40d)

Table 2 field control effectiveness test result (after medicine 20d)

Table 3 field control effectiveness test result (after medicine 40d)

As can be seen from table 2 and table 3, the present invention has significant preventive effect to grassy weed, sedge weed and broad leaved weed, significantly building performance, and the lasting period is long.

Table 4 medicament is to the security survey result on lawn

Bermuda grass in each process community grows fine, and has no any medicine spot, illustrates that various medicament is all safe to Bermuda grass.

Claims (10)

1., containing a mixed herbicide for flazasulfuron and trefanocide, it is characterized in that this weed killer herbicide with flazasulfuron and trefanocide for principle active component, the mass ratio of flazasulfuron and trefanocide is 1 ~ 80:1 ~ 80.

2. the mixed herbicide containing flazasulfuron and trefanocide according to claim 1, is characterized in that the mass ratio of flazasulfuron and trefanocide in this weed killer herbicide is 1:1 ~ 20.

3. the mixed herbicide containing flazasulfuron and trefanocide according to claim 1, is characterized in that the mass ratio of flazasulfuron and trefanocide in this weed killer herbicide is 1:1 ~ 10.

4. the mixed herbicide containing flazasulfuron and trefanocide according to claim 1, is characterized in that the mass ratio of flazasulfuron and trefanocide in this weed killer herbicide is 1:1 ~ 7.

5., according to the mixed herbicide described in claim 1,2,3 or 4, it is characterized in that both flazasulfuron and the trefanocide mass percentage in weed killer herbicide is 1 ~ 85%.

6., according to the mixed herbicide described in claim 5, it is characterized in that both flazasulfuron and the trefanocide mass percentage in weed killer herbicide is 10 ~ 45%.

7., according to the mixed herbicide described in claim 1,2,3 or 4, it is characterized in that it with flazasulfuron and trefanocide for the auxiliary agent that principle active component and agricultural chemicals allow is mixed with any one formulation.

8., according to the mixed herbicide described in claim 7, it is characterized in that described formulation is suspending agent, wetting powder, water dispersible granules, missible oil, microcapsule formulations.

9. the application of the mixed herbicide described in claim 1,2,3 or 4 before the seedling of lawn or after seedling in early stage weeding.

10. the application of mixed herbicide in Weeds in Turf in various grass family, sedge family and broad leaved weed described in claim 1,2,3 or 4.