CN103340208B

CN103340208B - The Herbicidal combinations of a kind of Han You oxaziclomefone and pyrazosulfuron

Info

Publication number: CN103340208B
Application number: CN201310218679.7A
Authority: CN
Inventors: 陈佛祥; 刘鹏; 冷忠国; 朱刚; 王礼文; 张志伟
Original assignee: Guangdong Zhongxun Agri Science Corp
Current assignee: Guangdong Zhongxun Agri Science Corp
Priority date: 2013-06-04
Filing date: 2013-06-04
Publication date: 2016-04-27
Anticipated expiration: 2033-06-04
Also published as: CN103340208A

Abstract

The invention discloses the Herbicidal combinations of a kind of Han You oxaziclomefone and pyrazosulfuron, its active ingredient is penoxsuam, pyribenzoxim, and all the other are insecticides adjuvant.Oxaziclomefone and the pyrazosulfuron ratio of quality and the number of copies in Herbicidal combinations is 1:20 ~ 20:1.Herbicidal combinations of the present invention can be prepared into suspending agent, oil-suspending agent, wetting powder or water dispersible granules, for preventing and kill off paddy field annual weed according to application needs.The paddy field weed successful of preventing and kill off of said composition is better than each single dose, reduces dosage, delays herbicide resistance.

Description

The Herbicidal combinations of a kind of Han You oxaziclomefone and pyrazosulfuron

Technical field

The present invention relates to the Herbicidal combinations of a kind of Han You oxaziclomefone and pyrazosulfuron, Shi Yi oxaziclomefone and pyrazosulfuron are active ingredient, for water prevention rice field annual weed.

Background technology

Chemical method weeding is agriculturally one of Main Means controlling weeds.In recent years, because some weed killer herbicide kind large area are used alone, a lot of weeds have been caused to develop immunity to drugs.Meanwhile, grass when weeds occur is mutually complicated, and grassy weed, broad leaved weed, the mixed life of nutgrass flatsedge multiclass weeds, single variety weed killer herbicide uses can not solve farmland weed, all can show defect in a certain respect and limitation.Variety classes weed killer herbicide mixture, have herbicidal spectrum wide, promote actual effect, delay herbicide resistance, time and labour saving advantage.

Oxaziclomefone, has another name called barnyard grass peace, english common name: oxaziclomefone, structural formula:

Oxaziclomefone belongs to organic heterocyclic class, is inner sucting conduction type herbicide for paddy field, primarily of root and the cauline leaf basal sink of weeds.Weeds contact medicament after leaves and stems chlorosis, stop growing, until withered.

Pyrazosulfuron, english common name: pyrazosulfuron-ethyl, structural formula:

Pyrazosulfuron is a kind of efficient sulfonylurea optional water field herbicidal.Active ingredient can spread rapidly in water, is transmitted in plant body, the synthesis of hindered aminoacid after the root absorption of weeds.Promptly suppress the growth of weeds leaves and stems and the stretching, extension of root, then completely withered.To rice safety.Herbicidal spectrum is comparatively wide, better to control efficiency such as broad leaved weed, sedge weed, barnyard grasses.Its drug effect not temperature influence, lasting medicine, disposable employed, the multiple Weed infestation of rice growing season can be controlled.

Variety classes weed killer herbicide mixture, have herbicidal spectrum wide, promote actual effect, delay herbicide resistance, time and labour saving advantage.Being screened by formulation of pesticide, can effectively improve actual control efficiency, reduce dosage, reduce costs, delay disease, worm, the drug-fast generation of crop smothering, is the important means that agricultural synthesis is administered.The recipe determination of the present inventor's paroxazine humulone and pyrazosulfuron conducts in-depth research Fa Xian oxaziclomefone and pyrazosulfuron carries out mixture, there are synergy or summation action in certain mixed ratio scope to paddy field annual weed, after further study, complete the present invention.

Summary of the invention

The object of the invention is to solve in prior art to farmland weed develop immunity to drugs problem and actual control efficiency poor, provide a kind of efficient, low toxicity, quick-acting are good and the lasting period is long, are conducive to the composition pesticide of the farmland weed comprehensive regulation.

Technical scheme: for achieving the above object, the invention provides the Herbicidal combinations of a kind of Han You oxaziclomefone and pyrazosulfuron, and active ingredient Wei oxaziclomefone and pyrazosulfuron, all the other are insecticides adjuvant.The ratio of quality and the number of copies of oxaziclomefone and pyrazosulfuron is 1:20 ~ 20:1.

Herbicidal combinations of the present invention is prepared into any one formulation being applicable to agriculturally using by known method, reasonable formulation has suspending agent, oil-suspending agent, wetting powder or water dispersible granules.

Herbicidal combinations provided by the invention, usually adopts and is watered spray method use, also can adopt other operation techniques agriculturally applied as required.

Herbicidal combinations provided by the invention, to the shooting stage after rice seedling, should use before the paddy field annual weed 5 leaf phase in use.

Beneficial effect: paddy field weed successful of preventing and kill off of the present invention is better than each single dose, reduces dosage, delays herbicide resistance.

Technology origin of the present invention: for further Xie oxaziclomefone and pyrazosulfuron mixture are to the synergy of weeds, the present inventor's paroxazine humulone and pyrazosulfuron mixture have carried out formulation screening test.

Test material: Monochoria vaginalis [Monochoriavaginalis] (field collection Seed storage).Barnyard grass [Echinochloacrusgalli (L.) BeawSetaria] (field collection Seed storage).

Test apparatus: controlled illumination box; POTTER exact test room spray tower; Electronic balance (sensibility reciprocal 0.1mg); Micropipette rifle etc.

Test method: the purity first taking certain mass is the former medicine of 96.5% oxaziclomefone, purity is the former medicine of 98% pyrazosulfuron, add the Tween 80 aqueous solution dilution that acetone fully dissolves rear use 0.1%, be mixed with single dose mother liquor respectively, arrange serial proportioning according to mixture object, each proportioning arranges 5 ~ 7 concentration gradients.Select representative susceptible weeds seed according to single dose herbicide spectrum, be cultured to 2 leaf 1 hearts for subsequent use.By select numbering the process of weeds cauline leaf after, to be placed in illumination box incubated at room temperature 20 days, to calculate control efficiency (fresh weight), then with method of least squares calculate suppress in dense EC ₅₀(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 show as summation action.

Actual measurement toxicity index (ATI)=(standard agent EC ₅₀/ reagent agent EC ₅₀) × 100.

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

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

Measurement result shows, and (see table 1 and table 2) ， oxaziclomefone and pyrazosulfuron between mixed ratio 1:20 ~ 20:1, all show as synergistic effect, co-toxicity coefficient is all more than 120.

Table 1, different Pei measure Bi oxaziclomefone and pyrazosulfuron the synergy of Monochoria vaginalis.

Table 2, different Pei measure Bi oxaziclomefone and phonetic Sulfometuron Methyl the synergy of barnyard grass.

Embodiment

The present invention is described by following specific embodiment, but the invention is not restricted to following specific embodiment.In these embodiments, unless otherwise indicated, all percentage is all weight percentage.

Preparation method's embodiment one:

Oxaziclomefone 1%,

Pyrazosulfuron 9%,

Agriculture breast 1601#15%,

Wetting agent LS5%,

SOPA-27004%，

Bentonite 3%,

Xanthans 0.1%,

Organosilicon 0.4%,

Glycerine 5%,

Deionized water to 100%.

Above-mentioned formula is pulverized in proportion in advance, then adds in sand mill and grind, the obtained 10% oxaziclomefone pyrazosulfuron suspending agent of allotment after high shear mixing.

Preparation method's embodiment two:

Oxaziclomefone 3%,

Pyrazosulfuron 7%,

Calcium dodecyl benzene sulfonate 5%,

Castor oil polyoxyethylene ether 11%,

Sodium lignin sulfonate 4%,

Methyl oleate to 100%.

Above-mentioned material is pulverized in proportion in advance, then adds in sand mill and grind, the obtained 10% oxaziclomefone pyrazosulfuron oil-suspending agent of allotment after high shear mixing.

Preparation method's embodiment three:

Oxaziclomefone 5%,

Pyrazosulfuron 5%,

Pull open powder 5%,

NNO12%，

Talcum powder 4%,

Kaolin to 100%.

Mix entering in blender after above-mentioned formula in proportion coarse crushing, more namely obtain 10% oxaziclomefone pyrazosulfuron wetting powder after air-flow crushing.

Preparation method executes example four:

Oxaziclomefone 7%,

Pyrazosulfuron 3%,

Lauryl sodium sulfate 6%,

Polycarboxylate 4%,

Sodium chloride 2%,

Polyethylene glycol 3%,

Kaolin to 100%.

By above-mentioned formula dry pulverization process, granulation, drying, the obtained 10% oxaziclomefone pyrazosulfuron water-dispersible granules of screening preparation in proportion.

Field control effectiveness test embodiment: the field control effectiveness test preventing and kill off rice direct seeding field annual weed.

Reagent agent and dispenser dosage:

(1) 10% oxaziclomefone pyrazosulfuron wetting powder (5% oxaziclomefone: 5% pyrazosulfuron), 2g (a.i.)/667m ²(1#);

(2) 10% oxaziclomefone pyrazosulfuron suspending agents (1% oxaziclomefone, 9% pyrazosulfuron), 2g (a.i.)/667m ²(2#);

(3) 10% oxaziclomefone pyrazosulfuron water-dispersible granules (7% oxaziclomefone, 3% pyrazosulfuron), 2g (a.i.)/667m ²(3#);

(4) 10% oxaziclomefone pyrazosulfurons dispersible oil-suspending agent (3% oxaziclomefone, 7% pyrazosulfuron), 2g (a.i.)/667m ²(4#).

Contrast medicament and dispenser dosage:

(5) 1% oxaziclomefone suspending agents, 2g (a.i.)/667m ²(5#);

(6) 10% pyrazosulfuron wetting powders, 2g (a.i.)/667m ²(6#).

Spraying time: on July 2nd, 2012, after rice growing 10 days, rice direct-seeding field weed 2-3 leaf phase dispenser.

Test site: Lao Keng village, Ren Shan town, Huizhou Huidong County.

Result of the test: in table 3.As can be seen from the test results: after dispenser 20 days, the oxaziclomefone of Ben Faming and pyrazosulfuron Herbicidal combinations prevent and kill off rice direct seeding field annual weed preventive effect more than 96%, the bright aobvious good single dose respectively contrasted in oxaziclomefone, pyrazosulfuron.In process of the test, each medicament is showed no generation poisoning, to rice safety.

Table 3, prevent and kill off rice direct seeding field annual weed field control effectiveness test result (after medicine 20 days).

Claims

1. containing the Herbicidal combinations having oxaziclomefone and pyrazosulfuron, it is characterized in that: active ingredient is oxaziclomefone and pyrazosulfuron, the ratio of quality and the number of copies of oxaziclomefone and pyrazosulfuron is 1:1.

2. the Herbicidal combinations of a kind of Han You oxaziclomefone according to claim 1 and pyrazosulfuron, is characterized in that: the formulation of described Herbicidal combinations is the one in suspending agent, oil-suspending agent, wetting powder or water dispersible granules.

3. the Herbicidal combinations of a kind of Han You oxaziclomefone according to claim 1 and pyrazosulfuron is preventing and kill off the application in paddy field annual weed.