CN103329909B

CN103329909B - The Herbicidal combinations of a kind of Han You oxazine humulone and mesotrione

Info

Publication number: CN103329909B
Application number: CN201310218648.1A
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: 2016-05-11
Anticipated expiration: 2033-06-04
Also published as: CN103329909A

Abstract

The invention discloses the Herbicidal combinations of a kind of Han You oxazine humulone and mesotrione, its active ingredient Wei oxazine humulone, mesotrione, all the other are insecticides adjuvant; Oxazine humulone and the mesotrione ratio of quality and the number of copies in Herbicidal combinations is 1:30～30:1. Herbicidal combinations of the present invention needs to be prepared into suspending agent, oil-suspending agent, wettable powder or water dispersible granules according to application, for preventing and kill off rice terrace annual grassy weeds. 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 oxazine humulone and mesotrione

Technical field

The present invention relates to a kind of agricultural chemicals Herbicidal combinations, Shi is taking oxazine humulone and mesotrione as active ingredient, for anti-The rice field annual grassy weeds of harnessing the river.

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.

Oxazine humulone, has another name called barnyard grass peace, english common name: oxaziclomefone, and structural formula:

Oxazine humulone belongs to organic heterocyclic class, is inner sucting conduction type herbicide for paddy field, main root and stem by weedsLeaf base absorbs. Leaves and stems chlorosis after weeds contacts medicament, stop growing, until withered.

Mesotrione, english common name: mesotrione, structural formula:

Mesotrione suppresses the activity of PHPPA dioxygenase (HPPD), and HPPD can turn amino acid Lip river propylhomoserinTurn to plastoquinone. Plastoquinone is the confactor of phytoene desaturase. It is the biosynthetic key of carotenoidEnzyme. Use 3-5 days implants separate living tissues of mesotrione to occur that yellow symptom causes withered spot thereupon, spreads all over whole after fortnightStrain plant. There is faintly acid, in inoic acid soil, can tightly be adsorbed on organic substance; At neutrality or basic soilIn, exist to be difficult for absorbed anionic form.

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 formula sieve of inventor's paroxazine humulone and mesotrioneChoosing conducts in-depth research, and Fa Xian oxazine humulone and mesotrione carry out mixture, in certain mixed ratio scope to rice terraceAnnual grassy weeds has synergy or summation action, after further study, has 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 composition pesticide of the farmland weed comprehensive regulation.

Technical scheme: for achieving the above object, the invention provides the weeding group of a kind of Han You oxazine humulone and mesotrioneCompound, the ratio of quality and the number of copies of active ingredient Wei oxazine humulone and mesotrione ， oxazine humulone and mesotrione is 1:30～30:1.

Herbicidal combinations of the present invention is prepared into and is applicable to upper any one formulation using of agricultural by known method, relatively goodFormulation have suspending agent, oil-suspending agent, wettable powder or water dispersible granules.

Herbicidal combinations provided by the invention, conventionally adopts and is watered spray method use, also can adopt as required agricultureOther operation techniques of applying in industry.

Herbicidal combinations provided by the invention, in use should be to the jointing stage after rice seedling, and rice terrace is annual assortedBefore the 5 leaf phases of grass, used.

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

Technology origin of the present invention: be further Xie oxazine humulone and the synergy of mesotrione mixture to weeds,Inventor's paroxazine humulone and mesotrione mixture have been carried out formulation screening test.

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; POTTER microtest chamber 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 96.5% oxazine humulone, and purity is that 95% mesotrione is formerMedicine, adds acetone fully to dissolve the Tween 80 aqueous solution dilution of rear use 0.1%, is mixed with respectively single dose mother liquor, according to mixture objectSerial proportioning is set, and each proportioning arranges 5～7 concentration gradients. Select representative sensitivity assorted according to single dose herbicide spectrumGrass seed, is cultured to dew bud for subsequent use. After the weeds cauline leaf of selecting numbering is processed, be placed on incubated at room temperature 20 in illumination boxMy god, calculate prevention effect (fresh weight), then calculate dense EC in inhibition by least square method₅₀(95% confidence limit), then use Sun YunpeiMethod is calculated co-toxicity coefficient (CTC).

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 of B × mixedThe percentage composition of B in agent).

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

Measurement result show (in table 1 and table 2) ， oxazine humulone and mesotrione between mixed ratio 1:30～30:1,There is obvious synergistic effect.

Table 1, different Pei measure the synergy of Monochoria vaginalis Bi oxazine humulone and mesotrione.

Table 2, different Pei measure the synergy of barnyard grass Bi oxazine humulone and mesotrione.

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.

Preparation method embodiment mono-:

Oxazine humulone 10%,

Mesotrione 20%,

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 added in sand mill and grind, allotment system after high shear mixingObtain 30% oxazine humulone mesotrione suspending agent.

Preparation method embodiment bis-:

Oxazine humulone 5%,

Mesotrione 25%,

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 added in sand mill and grind, allotment system after high shear mixingObtain 30% oxazine humulone mesotrione oil-suspending agent.

Preparation method embodiment tri-:

Oxazine humulone 20%,

Mesotrione 10%,

Pull open powder 5%,

NNO12%，

Talcum powder 4%,

Kaolin to 100%.

Above-mentioned formula is entered in blender after coarse crushing and mixed in proportion, more make 30% after air-flow crushingOxazine humulone mesotrione wettable powder.

Preparation method executes example four:

Oxazine humulone 25%,

Mesotrione 5%,

Lauryl sodium sulfate 6%,

Polycarboxylate 4%,

Sodium chloride 2%,

Polyethylene glycol 3%,

Kaolin to 100%.

By above-mentioned formula, dry pulverization process, granulation, dry, screening make 30% oxazine humulone mesotrione in proportionWater-dispersible granules.

Field control effectiveness test embodiment: the field control effectiveness test of preventing and kill off rice seedling throwing field annual grassy weeds.

Reagent agent and dispenser dosage:

(1) 30% oxazine humulone mesotrione wettable powder (20% oxazine humulone: 10% mesotrione), 3g (a.i.)/667m²（1#）；

(2) 30% oxazine humulone mesotrione suspending agents (10% oxazine humulone, 20% mesotrione), 3g (a.i.)/667m²（2#）；

(3) 30% oxazine humulone mesotrione water-dispersible granules (25% oxazine humulone, 5% mesotrione), 3g(a.i.)/667m²（3#）；

(4) 30% oxazine humulone mesotriones dispersible oil-suspending agent (5% oxazine humulone, 25% mesotrione), 3g(a.i.)/667m²（4#）。

Contrast medicament and dispenser dosage:

(5) 1% oxazine humulone suspending agents, 3g (a.i.)/667m²（5#）；

(6) 500 grams per liter mesotrione missible oil, 5g (a.i.)/667m²（6#）。

Spraying time: on July 16th, 2012, after the rice transplanting of rice seedling throwing field 5 days, the rice striking root phase, weeds phase beginning of being unearthed was mixed10 kilograms, urea spreads fertilizer over the fields 667m²。

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 30 days, the oxazine humulone of Ben Faming and nitre sulphur grassKetone Herbicidal combinations is prevented and kill off rice seedling throwing field annual grassy weeds preventive effect more than 98%, and the aobvious Hao of Ming Yu oxazine humulone, mesotrione are each rightAccording to single dose. In process of the test, each medicament is showed no generation poisoning, to rice safety.

Table 3, prevent and kill off rice seedling throwing field annual grassy weeds field control effectiveness test result (after medicine 30 days).

Claims

1. containing there being the Herbicidal combinations of oxazine humulone and mesotrione, it is characterized in that: active ingredient be oxazine humulone andThe ratio of quality and the number of copies of mesotrione ， oxazine humulone and mesotrione is 1:30～30:1.

2. the Herbicidal combinations of a kind of Han You oxazine humulone according to claim 1 and mesotrione, is characterized in that: itFormulation be the one in suspending agent, oil-suspending agent, wettable powder or water dispersible granules.

3. the Herbicidal combinations of a kind of Han You oxazine humulone according to claim 1 and mesotrione is at control rice terrace oneApplication in year raw weeds.