CN103329917A - Weeding composition containing oxaziclomefone and bensulfuron methyl - Google Patents

Abstract

The invention discloses a weeding composition containing oxaziclomefone and bensulfuron methyl. The effective constituents are oxaziclomefone and bensulfuron methyl, and the rest are pesticide adjuvants. The mass fraction ratio of oxaziclomefone to bensulfuron methyl in the weeding composition is 1:20-20:1. The weeding composition can be prepared into suspending agents, wettable powder or water dispersible granules according to the application needs, to prevent and kill off annual weeds in paddy fields. The composition is much better than single oxaziclomefone or bensulfuron methyl in preventing and killing off weeds in paddy fields, the dosage can be reduced, and the drug resistance of weeds can be postponed.

Description

The Herbicidal combinations of a kind of Han You oxazine humulone and bensulfuron-methyl

Technical field

The present invention relates to the Herbicidal combinations of a kind of Han You oxazine humulone and bensulfuron-methyl, Shi Yi oxazine humulone and bensulfuron-methyl are active ingredient, are used for control paddy field annual weed.

Background technology

The chemical method weeding is that agricultural goes up one of main means of controlling weeds.In recent years, because some weed killer herbicide kind large tracts of land are used separately, caused a lot of weeds to develop immunity to drugs.Simultaneously, the grass when weeds are taken place is complicated mutually, and grassy weed, broad leaved weed, nutgrass flatsedge multiclass weeds mix and give birth to, and the single variety weed killer herbicide uses can not solve farmland weed, all can show in a certain respect defective and limitation.The variety classes weed killer herbicide is mixed, have herbicidal spectrum wide, promote actual effect, delay the weeds pesticide resistance, the time and labour saving advantage.

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

The oxazine humulone belongs to the organic heterocyclic class, is the inner sucting conduction type herbicide for paddy field, and mainly root and the cauline leaf base portion by weeds absorbs.Leaves and stems chlorosis behind the weeds contacts medicament, stop growing, until withered.

Bensulfuron-methyl, english common name: bensulfuron-methyl, structural formula:

Bensulfuron-methyl is selectivity inner sucting conduction type sulfonylurea herbicide, can be in water diffusion rapidly, transfer to each one of weeds for weeds root and blade absorb, the biosynthesis of hindered aminoacid, lysine, isoleucine stops division and the growth of cell.The susceptible weeds GF is obstructed, and tender tissue turns to be yellow too early and suppresses the growth of leaf portion, hinders root growth and necrosis.It is harmless inertia chemicals that active ingredient enters the interior metabolism rapidly of paddy rice body, to rice safety.Using method is flexible, available pesticide-clay mixture, mispickel, spraying, sprinkles method such as water.Mobility is little in soil, and temperature, soil property influence little to its herbicidal effect.

The variety classes weed killer herbicide is mixed, have herbicidal spectrum wide, promote actual effect, delay the weeds pesticide resistance, the time and labour saving advantage.By the formulation of pesticide screening, can effectively improve actual control efficiency, reduce dosage, reduce cost, delay disease, worm, the drug-fast generation of crop smothering, be the important means that agricultural synthesis is administered.Further investigation Fa Xian oxazine humulone has been carried out in the prescription screening of inventor's paroxazine humulone and bensulfuron-methyl and bensulfuron-methyl is mixed, in certain mixed ratio scope the paddy field annual weed there are synergy or summation action, after further study, have finished the present invention.

Summary of the invention

The objective of the invention is to solve in the prior art develop immunity to drugs problem and actual control efficiency of farmland weed relatively poorly, 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 Herbicidal combinations of a kind of Han You oxazine humulone and bensulfuron-methyl, the ratio of quality and the number of copies of active ingredient Wei oxazine humulone and bensulfuron-methyl ， oxazine humulone and bensulfuron-methyl is 1:20～20:1.

Herbicidal combinations of the present invention is prepared into known method and is fit to any one formulation that agricultural goes up use, and reasonable formulation has suspending agent, oil-suspending agent, wetting powder or water dispersible granules.

Herbicidal combinations provided by the invention adopts usually and converts the use of water spray method, also can adopt agricultural to go up other operation techniques of using as required.

Herbicidal combinations provided by the invention in use should be to the shooting stage behind rice seedling, and paddy field annual weed 5 leaves used before the phase.

Beneficial effect: the paddy field weed effect of preventing and kill off of the present invention obviously is better than each single agent, reduces dosage, delays the weeds pesticide resistance.

Technology of the present invention source: for further Xie oxazine humulone and bensulfuron-methyl are mixed to the synergy of weeds, inventor's paroxazine humulone and bensulfuron-methyl are mixed and have carried out formulation screening test.

Test material: Monochoria vaginalis [ Monochoria vaginalis] (field is collected seed and preserved); The barnyard grass grass [ Echinochloa crusgalli(L.) Beaw Setaria] (field is collected seed and is preserved).

Test apparatus: controlled illumination box; The accurate laboratory of POTTER spray tower; Electronic balance (sensibility reciprocal 0.1mg); Micropipette rifle etc.

Test method: the purity that takes by weighing certain mass earlier is the former medicine of 96.5% oxazine humulone, purity is the former medicine of 98% bensulfuron-methyl, the Tween 80 aqueous solution with 0.1% after adding acetone fully dissolves dilutes, be mixed with single agent mother liquor respectively, according to the purpose that is mixed serial proportioning is set, each proportioning arranges 5～7 concentration gradients.Kill the grass spectrum according to single agent and select representative susceptible weeds seed, it is standby to be cultured to 2 leaves.After the weeds cauline leaf of selecting numbering handled, be placed in the illumination box incubated at room temperature 20 days, calculate control efficiency (fresh weight), then with method of least squares calculate suppress in dense EC ₅₀(95% confidence limit) calculates co-toxicity coefficient (CTC) with the abundant method of Sun Yun again.

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)+(percentage composition of B in toxicity index * mixture of B).

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

Measurement result show (see Table 1 and table 2) ， oxazine humulone and bensulfuron-methyl between mixed ratio 1:20～20:1, have obvious synergistic effect, co-toxicity coefficient is all more than 120.

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

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

Embodiment

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

Preparation method embodiment one:

Oxazine humulone 10%,

Bensulfuron-methyl 10%,

The newborn 1601# 15% of farming,

Wetting agent LS 5%,

SOPA-2700 4%，

Bentonite 3%,

Xanthans 0.1%,

Organosilicon 0.4%,

Glycerine 5%,

Deionized water to 100%.

Above-mentioned prescription is pulverized in proportion in advance, added in the sand mill and grind, allotment makes 20% oxazine humulone bensulfuron-methyl suspending agent after high shear mixing.

Preparation method embodiment two:

Oxazine humulone 1%,

Bensulfuron-methyl 19%,

Draw back powder 5%,

NNO 12%，

Talcum powder 4%,

Kaolin to 100%.

Above-mentioned prescription entered in the blender after the coarse crushing in proportion mix, after air-flow is pulverized, namely make 20% oxazine humulone bensulfuron-methyl wetting powder again.

The preparation method executes example three:

Oxazine humulone 19%,

Bensulfuron-methyl 1%,

Lauryl sodium sulfate 6%,

Polycarboxylate 4%,

Sodium chloride 2%,

Polyethylene glycol 3%,

Kaolin to 100%.

Dry pulverization process, granulation, drying, screening make 20% oxazine humulone bensulfuron-methyl water-dispersible granules in proportion with above-mentioned prescription.

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

Reagent agent and dispenser dosage:

(1) 20% oxazine humulone bensulfuron-methyl wetting powder (10% oxazine humulone: 10% bensulfuron-methyl), 2g (a.i.)/667m ²(1#);

(2) 20% oxazine humulone bensulfuron-methyl suspending agents (1% oxazine humulone, 19% bensulfuron-methyl), 2g (a.i.)/667m ²(2#);

(3) 20% oxazine humulone bensulfuron-methyl water-dispersible granules (19% oxazine humulone, 1% bensulfuron-methyl), 2g (a.i.)/667m ²(3#).

Contrast medicament and dispenser dosage:

(4) 1% oxazine humulone suspending agents, 2g (a.i.)/667m ²(5#);

(5) 10% bensulfuron-methyl wetting powders, 2g (a.i.)/667m ²(6#).

Spraying time: on April 16th, 2012, behind the rice growing 20 days, rice direct-seeding field weed 2-3 leaf phase dispenser.

Test site: Lao Keng village, the Ren Shan of Huidong County of Huizhou City, Guangdong Province town.

Result of the test: see Table 3.As can be seen from the test results: after the dispenser 30 days, the oxazine humulone of Ben Faming and bensulfuron-methyl composition were prevented and kill off rice direct seeding field annual weed preventive effect more than 97%, brightly showed good single agent in oxazine humulone, each contrast of bensulfuron-methyl.Each medicament there is no the generation poisoning in the process of the test, to rice safety.

Table 3, prevent and kill off rice direct seeding field annual weed field control effectiveness test result (behind the medicine 30 days).

Claims (3)

1. one kind contains the Herbicidal combinations that oxazine humulone and bensulfuron-methyl are arranged, and it is characterized in that: active ingredient is oxazine humulone and bensulfuron-methyl, and the ratio of quality and the number of copies of oxazine humulone and bensulfuron-methyl is 1:20～20:1.

2. the Herbicidal combinations of a kind of Han You oxazine humulone according to claim 1 and bensulfuron-methyl is characterized in that: its formulation is a kind of in suspending agent, oil-suspending agent, wetting powder or the water dispersible granules.

3. the application of Herbicidal combinations in preventing and kill off the paddy field annual weed of a kind of Han You oxazine humulone according to claim 1 and bensulfuron-methyl.