CN103444728B

CN103444728B - A kind of composition that contains florasulam and phenoxy carboxylic acid herbicides

Info

Publication number: CN103444728B
Application number: CN201310330980.7A
Authority: CN
Inventors: 陈佛祥; 吴泽伟
Original assignee: Guangdong Zhongxun Agri Science Corp
Current assignee: Guangdong Zhongxun Agri Science Corp
Priority date: 2013-08-01
Filing date: 2013-08-01
Publication date: 2016-05-11
Anticipated expiration: 2033-08-01
Also published as: CN103444728A

Abstract

The invention discloses a kind of composition that contains florasulam and phenoxy carboxylic acid herbicides, comprise florasulam, phenoxy carboxylic acid herbicides and insecticides adjuvant. Florasulam and the phenoxy carboxylic acid herbicides ratio of quality and the number of copies in composition is 1:4～1:20. Herbicidal combinations of the present invention is prepared into suspending agent in the time of practical application, and for preventing and kill off wheat paddock annual grassy weeds, herbicidal effect is obviously better than each single dose, reduces dosage, expands herbicide spectrum, delays herbicide resistance, to crop safety.

Description

A kind of composition that contains florasulam and phenoxy carboxylic acid herbicides

Technical field

The present invention relates to the composition that a kind of active ingredient is florasulam and phenoxy carboxylic acid herbicides, for controlWheat paddock annual grassy weeds.

Background technology

Chemical method weeding is one of upper Main Means of controlling weeds of agricultural. In recent years, due to some herbicide kindsLarge area is used separately, has caused a lot of weeds to develop immunity to drugs. Meanwhile, grass when weeds occur is complicated mutually, and grass family is assortedGrass, broad leaved weed, the mixed life of nutgrass flatsedge multiclass weeds, single variety herbicide uses can not solve farmland weed, all can show certainDefect and limitation on the one hand. Variety classes herbicide mixture, have herbicidal spectrum wide, promote actual effect, to delay weeds anti-The property of medicine, time and labour saving advantage.

Florasulam, english common name: florasulam, chemical name: 2', the fluoro-5-ethyoxyl-8-of 6'-bis-fluorine[1,2,4] triazoles [1,5-c] pyrimidine-2-sulfonanilide, structural formula:

Florasulam is acetolactate synthestase (ALS) inhibitor, by suppressing ALS enzymatic activity in plant with resistanceOnly the biosynthesis of branched-chain amino acid, causes the synthetic of protein to be damaged, thereby the mitosis of plant cell is stoppedIn the S phase (DNA synthesis phase) in G1 stage and the M phase in G2 stage, disturb the synthetic of DNA, therefore cell can not complete silk pointSplit, and then its this bulk-growth is stopped and death, finally cause plant death.

Phenoxy carboxylic acid herbicides, according to the difference of its active component ontological compound, can be divided into two different fundamental systemsRow. One is is body with 2,4-Dichlorophenol, as 2,4-dichlorphenoxyacetic acid (2,4-drips acid), 2, and 4-Dichlorophenoxy propionic acid(2,4-drips P), 2,4-Dichlorophenoxybutanoic (2,4-drips B). Another kind is taking orthoresol as body, as 2 first 4 chloric acid(MCPA), Vi par (MCPP), Thistrol (MCPB). Phenoxy carboxylic acid structural formula:

Phenoxy carboxylic acid herbicides can be by cauline leaf, also can pass through Root Absorption, the medicament that cauline leaf absorbs and photosyntheticEffect product is in conjunction with conducting in plant along phloem sieve tube, the medicament of root absorption with transpiration along xylem vesselMobile, accumulate at separate living tissue. After plant absorbs, the concentration of the auxin in body is higher than normal value, thereby broken plantIn hormonal balance, have influence on the eubolism of plant, cause a series of Physiology and biochemistries of susceptible weeds to change, tissue abnormalities andDamage, suppresses growth and development of plants, occurs plant distortion, and deformity is until dead.

Variety classes herbicide mixture, have herbicidal spectrum wide, promote actual effect, delay herbicide resistance, time and labour savingAdvantage. Screen by formulation of pesticide, can effectively improve actual prevention effect, reduce dosage, reduce costs, delay disease, worm, grassThe drug-fast generation of evil is the important means that agricultural synthesis is administered. The inventor joins florasulam and phenoxy carboxylic acidSide's screening conducts in-depth research, and finds that florasulam and phenoxy carboxylic acid carry out mixture, in certain mixed ratio scopeWinter wheat field annual grassy weeds is had to synergy or summation action, after further study, completed the present invention.

Summary of the invention

The object of the invention is to solve in prior art farmland weed develop immunity to drugs problem and actual prevention effectPoor, provide a kind of efficient, low toxicity, quick-acting is good and the lasting period is long, is conducive to the agriculture of the wheat paddock annual grassy weeds comprehensive regulationDrug composition.

Technical scheme: for achieving the above object, the invention provides one and contain florasulam and phenoxy carboxylic acid weedingThe composition of agent, active ingredient is florasulam and phenoxy carboxylic acid herbicides, all the other are insecticides adjuvant. Florasulam andThe ratio of quality and the number of copies of phenoxy carboxylic acid herbicides in composition is 1:4～1:20.

Described phenoxy carboxylic acid herbicides is selected from the one in 2 first 4 chlorine, the 2 first different monooctyl esters of 4 chlorine or 2 first 4 chlorine sodium.

Described Herbicidal combinations can, according to well known to a person skilled in the art method, be processed into suspending agent.

The insecticides adjuvant using in Herbicidal combinations of the present invention comprise solvent, emulsifying agent, wetting agent, stabilizing agent, dispersant,Thickener, pH adjusting agent, defoamer, antifreezing agent, deionized water, filler etc. are all various helping conventional in Pesticide formulationAgent, concrete composition and consumption required simple test to determine according to formula.

Herbicidal combinations of the present invention is applicable to prevent and kill off wheat paddock annual grassy weeds, in use should be annual assorted at wheat paddockThe grass 2-4 leaf phase is used.

Herbicidal combinations of the present invention is prepared into suspending agent in the time of practical application, for preventing and kill off wheat paddock annual grassy weeds,Herbicidal effect is obviously better than each single dose, reduces dosage, expands herbicide spectrum, delays herbicide resistance, to crop safety.

The technology of the present invention source: for further understanding florasulam and the combine work of phenoxy carboxylic acid mixture to weedsWith, the inventor has carried out formulation screening test to florasulam and phenoxy carboxylic acid mixture.

Test material: Monochoria vaginalis [Monochoriavaginalis] (field is collected seed and preserved).

Barnyard grass [Echinochloacrusgalli (L.) BeawSetaria] (field is collected seed and preserved).

Test apparatus: controlled illumination box; The accurate laboratory of POTTER spray tower; Electronic balance (sensibility reciprocal 0.1mg); Micro-Amount liquid-transfering gun etc.

Test method: the purity that first takes certain mass is the former medicine of 98% florasulam, the former medicine of 95%2 first 4 chlorine, 95%2The former medicine of the first different monooctyl ester of 4 chlorine, the former medicine of 88%2 first 4 chlorine sodium, add the Tween 80 aqueous solution that acetone fully dissolves rear use 0.1% to dilute,Be mixed with respectively single dose mother liquor, according to mixture object, serial proportioning be set, each proportioning arranges 5～7 concentration gradients. According to listAgent herbicide spectrum is selected representative susceptible weeds seed, is cultured to 2 leaf 1 hearts for subsequent use. The weeds cauline leaf place of numbering will be selectedAfter reason, be placed in illumination box incubated at room temperature 20 days, calculate prevention effect (fresh weight), then calculate and suppress by least square methodIn dense EC₅₀(95% confidence limit), then calculate co-toxicity coefficient (CTC) by the abundant method of Sun Yun.

Co-toxicity coefficient (CTC) >=120 shows as synergistic effect; Co-toxicity coefficient (CTC)≤80 shows as antagonism; 80 <Co-toxicity coefficient (CTC) < 120 shows as summation action.

Actual measurement toxicity index (ATI)=(standard medicament EC50/ reagent agent EC50) × 100.

Theoretical toxicity index (TTI)=(percentage composition of A in toxicity index × mixture of A)+(toxicity index × mixture of BThe percentage composition of middle B).

Co-toxicity coefficient (CTC)=[the theoretical toxicity index of mixture actual measurement toxicity index (ATI)/mixture (TTI)] × 100.

Measurement result show (in table 1～table 6) florasulam respectively with 2 first 4 chlorine, the different monooctyl ester of 2 first 4 chlorine, 2 first 4 chlorine sodiumBetween mixed ratio 1:4～1:20, there is obvious synergy or summation action. Florasulam and 2 first 4 chlorine are at 1:8, synergyObviously, co-toxicity coefficient is 135.95 in effect; Florasulam and the different monooctyl ester of 2 first 4 chlorine are at 1:12, and synergistic effect is obvious, altogether poison systemNumber is more than 123.07; Florasulam and 2 first 4 chlorine sodium are at 1:16, and synergistic effect is obvious, and co-toxicity coefficient is more than 132.10.

Table 1, different proportioning florasulam and 2 first 4 chlorine are measured the synergy of barnyard grass.

Table 2, different proportioning florasulam and 2 first 4 chlorine are measured the synergy of chickweed.

Table 3, different proportioning florasulam and the different monooctyl ester of 2 first 4 chlorine are measured the synergy of barnyard grass.

Table 4, different proportioning florasulam and the different monooctyl ester of 2 first 4 chlorine are measured the synergy of chickweed.

Table 5, different proportioning florasulam and 2 first 4 chlorine sodium are measured the synergy of barnyard grass.

Table 6, different proportioning florasulam and 2 first 4 chlorine sodium are measured the synergy of chickweed.

Detailed description of the invention

The present invention describes by following specific embodiment, but the invention is not restricted to following specific embodiment. At theseIn embodiment, unless otherwise indicated, all percentage is all weight percentage.

Example of formulations one (3.6% florasulam 2 first 4 chlorine suspending agents):

Florasulam 0.4%,

2 first 4 chlorine 3.2%,

Agriculture breast 1601#13%,

To oleoyl amido methyl phenyl ethers anisole sulfonic acid 4%,

Alkyl phenol formaldehyde resin polyoxyethylene ether sulfate 3%,

Bentonite 5%,

Xanthans 0.3%,

Organosilicon 0.5%,

Glycerine 4%,

Deionized water complements to 100%.

Above-mentioned formula is pulverized in proportion in advance, then added in sand mill and grind, allotment system after high shear mixingObtain 3.6% florasulam 2 first 4 chlorine suspending agents.

Example of formulations two (the different monooctyl ester suspending agent of 5.2% florasulam 2 first 4 chlorine):

Florasulam 0.4%,

The different monooctyl ester 4.8% of 2 first 4 chlorine,

Agriculture breast 1601#17%,

To oleoyl amido methyl phenyl ethers anisole sulfonic acid 6%,

Alkyl phenol formaldehyde resin polyoxyethylene ether sulfate 4%,

Bentonite 4%,

Xanthans 0.1%,

Organosilicon 0.4%,

Glycerine 3%,

Deionized water complements to 100%.

Above-mentioned formula is pulverized in proportion in advance, then added in sand mill and grind, allotment system after high shear mixingObtain the different monooctyl ester suspending agent of 5.2% florasulam 2 first 4 chlorine.

Example of formulations three (6.8% florasulam 2 first 4 chlorine sodium suspending agents):

Florasulam 0.4%,

2 first 4 chlorine sodium 6.4%,

Agriculture breast 1601#18%,

To oleoyl amido methyl phenyl ethers anisole sulfonic acid 6%,

Alkyl phenol formaldehyde resin polyoxyethylene ether sulfate 4%,

Bentonite 4%,

Xanthans 0.1%,

Organosilicon 0.4%,

Glycerine 3%,

Deionized water complements to 100%.

Above-mentioned formula is pulverized in proportion in advance, then added in sand mill and grind, allotment system after high shear mixingObtain 6.8% florasulam 2 first 4 chlorine sodium suspending agents.

Field efficacy embodiment mono-: to weeds of wheat field control effectiveness test.

Reagent agent and dispenser dosage:

(1) 3.6% florasulam 2 first 4 chlorine suspending agents (0.4% florasulam: 3.2%2 first 4 chlorine), mu preparationGram 247.50 (1#).

The different monooctyl ester suspending agent of (2) 5.2% florasulam 2 first 4 chlorine (0.4% florasulam: 4.8%2 first 4 chlorine are different pungentEster), mu 166.25 grams, preparation (2#).

(3) 6.8% florasulam 2 first 4 chlorine sodium suspending agents (0.4% florasulam: 6.4%2 first 4 chlorine), system for mu125.63 grams of agent (3#).

(4) 5% florasulam suspending agents, mu 0.3 gram, preparation (4#).

(5) 13%2 first 4 chlorine water agent, mu 60 grams, preparation (5#).

(6) 39.6%2 first 4 chlorine suspending agents, mu 63 grams, preparation (6#).

(7) 40%2 first 4 chlorine sodium wettable powders, mu 60 grams, preparation (7#).

Dispenser period: the weeds 2-4 leaf phase, be watered even spraying.

Result of the test: in table 7. As can be seen from the test results: after dispenser 7 days, Herbicidal combinations of the present invention was to wheatTotal preventive effect of field annual grassy weeds is 95.2%, 84.6% and 79.2%; After dispenser 15 days, total preventive effect was at 96.3%, 89.8% and83.1%, significantly better than the single dose of contrast, synergistic effect is remarkable, and quick-acting and lasting period are obviously better than single dose.

Table 7, control weeds of wheat field control effectiveness test result.

Claims

1. a composition that contains florasulam and phenoxy carboxylic acid herbicides, is characterized in that percentage by weight: two fluorineSulphur grass amine 0.4%, 2 first 4 chlorine 3.2%, agriculture breast 1601#13%, to oleoyl amido methyl phenyl ethers anisole sulfonic acid 4%, alkylphenol formaldehydeResin polyoxyethylene ether sulfate 3%, bentonite 5%, xanthans 0.3%, organosilicon 0.5%, glycerine 4%, deionizationWater complements to 100%;

Above-mentioned formula is pulverized in proportion in advance, then added in sand mill and grind, after high shear mixing, allocate and make3.6% florasulam 2 first 4 chlorine suspending agents.