CN107535505A - Herbicidal combinations containing S-metolachlor and flumioxazin - Google Patents

Abstract

Invention is related to a kind of Herbicidal combinations containing S-metolachlor and flumioxazin, and the weight of S-metolachlor and flumioxazin ratio is 1 in the composition:60‑60:1, preferably 63：2, the composition can be prepared into wettable powder, water dispersible granules, dispersible oil-suspending agent, aqueous emulsion, microemulsion.The Herbicidal combinations of the present invention can be used for preventing and treating various crop weeds, it is possible to reduce pesticide usage amount, reduction residues of pesticides, Environmental compatibility are good, and have certain production-increasing function.

Description

Herbicidal combinations containing S-metolachlor and flumioxazin

Technical field

The present invention relates to a kind of Herbicidal combinations and its application, it particularly relates to S-metolachlor and propine fluorine The Herbicidal combinations of careless amine, for preventing and kill off various crop weeds.

Background technology

Soybean, peanut are the main oil crops in China, per annual planting area about at 12,000,000 hectares, and with The adjustment of the structure of agricultural production, the trend that cultivated area also expands year by year.Because China is vast in territory, natural conditions are complicated, The difference of various Food crops, cropping system and cultivation step, so as to form the weed population of Different groups.Soybean, The medium crop smothering area of peanut all accounts for the 53. more than 4% of total cultivated area, and thus loss soybean, peanut are 5% 20% every year, very To more than 30%.With the development of agricultural cience and farming techniques, the popularization and application of chemical herbicide are as saving of labor, time saving, saving cost One of strong well stimulation.At present, soybean, peanut herbicide before seedling stage kind, the mainly herbicide such as butachlor, Acetochlor. Due to long-term use, weeds are caused to develop immunity to drugs, weed community is also changed, and herbicidal effect declines year by year.To understand Certainly these problems, research and development are needed in production badly to soybean, peanut safety, the herbicide New raxa good to weeds effect.

S-metolachlor, English name s-metolachlor, No. CAS is 178961-20-1, is a kind of chloro acyl Amine herbicide, be by Syngenta Co., Ltd of Switzerland 1975 exploitation protein synthetase inhibitors, before belonging to selective bud Herbicide, mainly suppress the growth of cell by hindering the synthesis of protein.It is usually used in corn and soybean, peanut, sugarcane, cotton The control of weeds of the crop fields such as flower.Discovered in recent years, S-metolachlor can effectively prevent and treat Soybean Field annual gramineous weed It is but poor to the prevention effect of broad leaved weed with part sedge weed.

Flumioxazin, English name Flumioxazin, No. CAS is 103361-09-7, is SUMITOMO CHEMICAL chemistry work N- phenyl neighbour's ammonia first phthalimide class herbicides that industry Co., Ltd. formulates and developed.It has been investigated that flumioxazin can suppress Proporphyrinogen oxidase, the peroxidating of photosensitization and Cell membrane lipids can be caused, the common tender and mechanism of cell membrane is caused can not Inverse destruction, big Tanaka, the cauline leaf necrosis of susceptible weeds after cauline leaf process is dead after solar radiation, sensitive after soil treatment The necrosis of weeds bud, it is dead after of short duration solar radiation.

Rational chemical herbicide compounding or mixture, which have, expands herbicidal spectrum, improves prevention effect, extends the optimum period for applying fertilizer, subtracts Few dosage, poisoning is reduced, reduces residual, delays positive feature, mixture of herbicides or the mixtures such as drug-fast generation and development It is one of maximally efficient method to solve the above problems.We screen with the basis of field test indoors, filter out essence Isopropyl methoxalamine and flumioxazin compounding, have obvious synergistic effect.And on S-metolachlor and flumioxazin The Herbicidal combinations of compounding and application there is no people to report at present.

The content of the invention

It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of efficient, low toxicity, low cost, lasting effect are good Composition, be advantageous to the integrated treatment of crop weeds, said composition active component includes S-metolachlor and propine fluorine Careless amine, it is unexpected, there is synergistic function between the composition.

To achieve the above object, the present invention provides a kind of S-metolachlor and flumioxazin as principle active component The weight ratio of Herbicidal combinations, S-metolachlor and flumioxazin is 1：60-60：1, it is preferred that weight ratio is 30：1-1: 30, it is furthermore preferred that weight ratio is 30：1 or 63：2.

Further, the Herbicidal combinations by method conventional in Pesticide formulation be processed into wettable powder, Water dispersible granules, dispersible oil-suspending agent, aqueous emulsion, microemulsion.

Further, described Herbicidal combinations are used to prevent and kill off soybean, peanut, corn, rice terrace grassy weed, broad-leaved Weeds and sedge weed.

Further, the weeds are preferably barnyard grass, lady's-grass.

The frequency of use and usage amount of the Herbicidal combinations of the present invention with crops, weeds, weather condition change and small have Change, can reach the purpose effectively prevented and treated by using suitable dosage.

Compared with prior art, it is of the invention to be a little：

1st, S-metolachlor and flumioxazin composition have obvious synergistic function, can significantly improve and prevent and kill off Effect, and improve this season crop yield；

2nd, S-metolachlor and flumioxazin composition, it is different to the weeds mechanism of action, the anti-medicine of weeds can be delayed The generation of property.

3rd, the prevention effects such as soybean, corn, the annual broadleaf weed of rice terrace, grassy weed are protruded.

Embodiment

In order that the purpose of the present invention, technical scheme and advantage are definitely, the present invention is entered with reference to embodiment Row describes in detail.

Test application examples one:

Toxicity Determination of the S-metolachlor with flumioxazin mixture to soybean weedses

Test objective：S-metolachlor is determined under the conditions of greenhouse production and matches somebody with somebody composition with flumioxazin and its different blended To lady's-grass, the herbicidal effect of barnyard grass, and its synergy is have rated, be the formulation development and agriculture chemical registration field medicine of Mixed Pharmacy Effect experiment provides scientific basis.

Reagent agent：96% flumioxazin active compound, 96% S-metolachlor active compound.

For trying weeds：Barnyard grass, lady's-grass（It is that seed is collected in field, germination percentage is more than 90%）.

Test method：96% flumioxazin active compound, the 96% S-metolachlor active compound of certain mass are first weighed, adds third Diluted after the abundant solvent of ketone with the 0.1% tween80 aqueous solution, be each configured to single dose mother liquor, series is set according to mixture purpose Proportioning, culture barnyard grass, lady's-grass are standby to the heart of 1 leaf 1.By after the weeds cauline leaf process for selecting numbering, room in illumination box is placed on Temperature culture 5 days, calculates prevention effect, is then calculated with least square method and suppresses final concentration EC₅₀（95% confidence limit）, then use Sun Yun Abundant method calculates co-toxicity coefficient（CTC）, result of the test is shown in Table 1, table 2.

Table 1 can be seen that S-metolachlor with flumioxazin 1:60-60:When 1, when spending coefficient together and being all higher than 120, table Reveal synergistic function；And it is 1 in proportioning:30-30:When 1, spend coefficient together and be all higher than 130, synergistic function becomes apparent from.

S-metolachlor and flumioxazin are 1 it can be seen from the data of table 2:60-60:When 1, spend coefficient together and be all higher than 120 When, show synergistic function；And it is 1 in proportioning:30-30:When 1, spend coefficient together and be all higher than 140, synergistic function is more Substantially.

Formulation application embodiment：

Embodiment 1:The 62% dispersible oil-suspending agent of S-metolachlor flumioxazin（30：1）

S-metolachlor 60%

Phenethyl phenol polyethenoxy ether 2%

Aluminium-magnesium silicate 4%

Ethylene glycol 5%

Silicone antifoams agent 1%

Corn oil surplus

Embodiment 2:The 65% dispersible oil-suspending agent of S-metolachlor flumioxazin（63：2）

S-metolachlor 63%

Phenethyl phenol polyethenoxy ether 2%

Aluminium-magnesium silicate 4%

Ethylene glycol 5%

Silicone antifoams agent 1%

Corn oil surplus

Embodiment 3:50% S-metolachlor flumioxazin aqueous emulsion（1:1）

S-metolachlor 25%

Flumioxazin 25%

Phenethyl phenol polyethenoxy ether 4%

Alkyl benzene calcium sulfonate 6%

Ethylene glycol 3%

Dimethylbenzene 15%

Silicone oil 2%

Deionized water surplus

Embodiment 4:50% S-metolachlor propine fluorine grass water dispersible granules（9：1）

S-metolachlor 45%

Flumioxazin 5%

Naphthalene sulfonic acid-formaldehyde condensation product sodium salt 5%

Alkylnaphthalene sulfonate 3%

Urea 3%

Xanthans 1%

Kaolin surplus

Field control effectiveness test

For the practical application effect of the preferably checking present invention, preventing and treating Soybean Field is carried out using the preparation of the embodiment of the present invention below Weeds field control effectiveness test.

Reagent agent：（1）The preparation of embodiment 1；（2）The preparation of embodiment 2；（3）The preparation of embodiment 3；（4）The preparation of embodiment 4； （5）50% flumioxazin wettable powder；（6）960g/L S-metolachlor missible oil.

Dispenser period：Weeds 2-3 leaves, are watered even spraying.

Result of the test is shown in Table 3

As can be seen from Table 3, S-metolachlor and flumioxazin compounding have to barnyard grass, lady's-grass prevents effect well, and And having certain volume increase to soybean, preventive effect is due to single dose preventive effect, especially when S-metolachlor and flumioxazin are 63：When 2, Described composition is above 96% to the preventive effect of barnyard grass and lady's-grass, and effect of increasing production is more than 33%, in this experiment scope of medication It is interior, to soybean crops safety.

Claims (6)

1. a kind of Herbicidal combinations, it is characterised in that active ingredient includes S-metolachlor and flumioxazin.

2. Herbicidal combinations according to claim 1, it is characterised in that the S-metolachlor and flumioxazin Weight ratio is 1:60-60：1.

3. Herbicidal combinations according to claim 1, it is characterised in that the S-metolachlor and flumioxazin Weight ratio preferably 1:30-30：1.

4. Herbicidal combinations according to claim 1, it is characterised in that the S-metolachlor and flumioxazin Weight ratio preferably 63：2.

5. according to the claim any one of claim 1-4, it is characterised in that its formulation be wettable powder, It is any in water dispersible granules, dispersible oil-suspending agent, aqueous emulsion, microemulsion.

6. application of the Herbicidal combinations described in any one of claim 1-5 kinds claim in crop weeds are prevented and kill off.