CN105494388A

CN105494388A - Weeding composition

Info

Publication number: CN105494388A
Application number: CN201510999681.1A
Authority: CN
Inventors: 杨会营; 刘晓娇; 吴勇
Original assignee: Beijing Yanhua Yongle Biotechnology Co Ltd
Current assignee: Beijing Yanhua Yongle Biotechnology Co Ltd
Priority date: 2015-12-27
Filing date: 2015-12-27
Publication date: 2016-04-20

Abstract

The invention belongs to the technical field of pesticide and discloses a weeding composition. The weeding composition is characterized by containing the two active components of florasulam and linuron. The weeding composition is used for preventing one-year weeds in wheat field and has the advantages of being obvious in weeding effect, safe to wheat, long in lasting time and obvious in synergistic function.

Description

A kind of Herbicidal combinations

Technical field

The invention belongs to pesticide field, being specifically related to a kind of is the Herbicidal combinations of active component by florasulam and lorox.

Background technology

Florasulam (florasulam) is the triazolo pyrimidine sulphonyl class super-high-efficient weed killer herbicide developed by DowAgroscience company, and florasulam is inner-adsorption conduction-type herbicide, can conduct to weeds complete stool, and thus herbicide is thorough, can not recur.Efficacy stability at low temperatures, this point is that other weed killer herbicides are incomparable.This composition is mainly used in wheat paddock and prevents and kill off broad leaved weed.Florasulam is inner-adsorption conduction-type herbicide, by plant leaf blade and Root Absorption, can accumulate and make plant progressively dead in meristematic tissue.This weed killer herbicide possesses that biologically active is high, the advantage of broad weed-killing spectrum, and because its action target ALS enzyme does not relate to humans and animals, therefore this kind of weed killer herbicide has very high safety to humans and animals.

Lorox (linuron) is phenyl ureagroup herbicides, has Uptake and translocation and action of contace poison.Drug effect is high, but poor selectivity.To this product absorption affinity by force, therefore rich clay should be larger than sandy thin meagerly block consumption for soil clay particle and organic matter.Lorox to annual gramineous weed, as lady's-grass, green foxtail, gram, knotweed etc. has good preventive effect, is suitable for the field of vegetables application such as celery, pulse family field of vegetables, carrot, potato, green onion.Structural formula is as follows:

Shown by long-term field control effectiveness test, using with between some weed killer herbicide can overcome or alleviate chemical injury of crops.Meanwhile, because various weed killer herbicide is because of the difference of its chemical composition, physicochemical property, herbicide scope is also different.Some weed killer herbicide herbicide scope is narrower, but has unique action effect; The herbicidal spectrum of some weed killer herbicide is very wide, can prevent and treat the multiple weeds in field simultaneously.Field trial shows, Long-Time Service single herbicide not only easily produces resistance and poisoning, also can cause larger impact to soil environment.The composite of weed killer herbicide is widely regarded as one of important measures of weed killer herbicide reasonable employment, can reduce the generation of resistance after composite, reduces weed killer herbicide to the poisoning of economic crops, reduces the impact on soil, thus increase economic efficiency.Therefore we by florasulam and lorox two kinds of active ingredients composite, to reaching above-mentioned effect.

Summary of the invention

The object of the invention is to the shortcoming for prior art, the Herbicidal combinations that a kind of herbicidal effect is good, broad weed-killing spectrum, security performance are high, production-increasing function is remarkable, dispenser is convenient, toxicity is low is provided.

Above-mentioned Herbicidal combinations, the weight ratio of florasulam and lorox is 1:60 ~ 60:1.

Utilize above-mentioned Herbicidal combinations, be equipped with the known auxiliary agent of those skilled in that art, formulation of the present invention can be made with the known method of those skilled in that art.Its formulation that can process is suspending agent, water dispersible granules.

Above-mentioned Herbicidal combinations is mainly used in preventing and treating the grassy weed in wheat paddock and broad leaved weed.

The advantage that above-mentioned Herbicidal combinations has: 1. weeding is rapid, can kill the common weed in wheat paddock fast; 2. strong drug action, the mode of action is unique; 3. to wheat safety, stability is strong; 4. formulation is advanced, conveniently uses; 5. synergistic effect is obvious, and amount ratio single medicament usage amount is low.

Embodiment

In order to verify florasulam and the composite synergistic effect of lorox two kinds of active ingredients, first applicant tests under room temperature condition of pot, closes herbicidal effect, evaluate its synergy to measure different blended combo.

Test selects amur foxtail and clearvers as target weeds.

Test medicine solution: the former medicine of lorox accurately taking the former medicine of constant weight 95% florasulam and 95%, dissolves with appropriate methyl alcohol, adds in the clear water containing 0.1% Tween 80 emulsifier, is stirred to evenly, the solution containing certain active ingredient.

Placebo solution: the water adding the Tween 80 emulsifier of 0.1% with isodose methyl alcohol.

Test method is as follows: after adopting the inspection of gowing method mixed, medicament is active to amur foxtail, clearvers, at the soil of the polypots amount of setting of high 7cm, diameter 10cm, 20, the seed for examination weeds is evenly sowed in polypots, the thin sand and soil that lid 0.5-1cm is thick, be placed on room temperature (about 20 DEG C) daylight to cultivate, the above-mentioned former drug solns prepared carries out composite and is diluted to the liquid of finite concentration gradient, until weed growth to carrying out cauline leaf spraying process during the 3-5 leaf phase, every alms bowl spraying liquid 1ml, each process 4 repetition, uses blank solution to compare.After process, test material is placed in room temperature and cultivates, the growing state of routine observation weeds, within 21 days, estimates damage symptoms and the growth inhibition situation of target weeds afterwards, weighs strain fresh weight, calculate fresh weight inhibition (%).

Evaluation of effect method, evaluate weed killer herbicide mode of application according to gowing method, its formula is as follows:

E ₀(％)＝X+Y×(100-X)/100

C＝E-E ₀

E in formula ₀be to the theoretical preventive effect that weeds suppress after two kinds of active ingredient mixtures, E is to the actual measurement preventive effect that weeds suppress after two kinds of active ingredient mixtures, X is that florasulam is at this dose to the preventive effect of target weeds, Y is that lorox is at this dose to the preventive effect of target weeds, C is the synergy coefficient of mixture preparation, in order to evaluate the synergy of two kinds of active ingredients, is synergistic effect when C is greater than 10%, be antagonism when being less than 10%, be addition between ± 10% time.

Table 1 florasulam and lorox different ratio survey result of the test to the raw of the activity of weeding of amur foxtail

Upper table can be found out, composite between two kinds of active ingredients, and synergy coefficient (C) has all exceeded 12, has synergistic effect clearly to the preventive effect of amur foxtail.

Table 2 florasulam and lorox different ratio survey result of the test to the raw of the activity of weeding of clearvers

Upper table can be found out, composite between two kinds of active ingredients, and synergy coefficient (C) has all exceeded 12, has synergistic effect clearly to the preventive effect of clearvers.

Above-mentioned experimental data can be found out, by florasulam and lorox composite, and use compared with single medicament, have good synergistic effect, have good control efficiency to the weeds that wheat paddock is common.

Below by way of instantiation in order to further describe the present invention, but the present invention is absolutely not only only limitted to these embodiments following.In formula, percentage is all weight percentage, and the former medicine used and auxiliary agent are other producers and provide.

Formulation examples is as follows:

Embodiment 130.5% florasulam lorox water dispersible granules

Embodiment 246.5% florasulam lorox water dispersible granules

Embodiment 322% florasulam lorox suspending agent

Embodiment 428% florasulam lorox suspending agent

Embodiment 520% florasulam lorox suspending agent

Embodiment 642% florasulam lorox suspending agent

Embodiment 733% florasulam lorox suspending agent

Embodiment 831% florasulam lorox water dispersible granules

Embodiment 930.5% florasulam lorox suspending agent

Above embodiment is selected to carry out preventing and treating the field efficacy experiment of weeds of wheat, the effect of wheat paddock standing grain basis and broad leaved weed is prevented and treated to determine to fill a prescription, simultaneously by comparing with lorox single dose with florasulam, determine composite after synergistic effect, be specifically implemented as follows:

Experiment: florasulam lorox water dispersible granules (English formulation is called for short: WDG) and different agents prevent and treat wheat field herbicide experiment.Test site is Zhumadian prefecture, Henan province area, time is on March 12nd, 2014, wheat is the 7-8 leaf phase, the weeds 3-4 leaf phase, test medicine is all prepared according to above-mentioned example and is used 10% florasulam suspending agent (English formulation abbreviation: SC), (English formulation is called for short 10% lorox suspending agent: SC) contrast, test totally four process, each process three repetition, community randomized arrangement, plot area 120m ².Carry out the spraying of cauline leaf, after medicine 15 days and within 30 days, observe the strain preventive effect of each medicament respectively.The record dispenser synoptic data of a week, specific as follows:

Table 3 duration of test meteorological data

Respondent is amur foxtail and the clearvers in field, and visual test medicament occurs without poisoning wheat.Preventive effect calculates according to the following equation:

Result of the test is as following table:

The test of pesticide effectiveness of table 4 florasulam lorox different ratio control weeds of wheat

Passable as apparent from above-mentioned data, florasulam and lorox composite after, all embodiments all more than 88%, compare two kinds of single doses to the preventive effect of amur foxtail and clearvers, complex preparation preventive effect difference and significantly.

As can be seen from the above table, two kinds of active ingredient is composite obviously synergistic effect, and complex preparation is the preventive effect of 30 days compared with the preventive effect of 15 days simultaneously, all improves.In this test scope of medication, to wheat safety, after composite, can drug effect be increased, reduce the amount of labour of peasant, increase economic efficiency.

Claims

1. a Herbicidal combinations, is characterized in that: active component is made up of florasulam and lorox, and the weight ratio of described florasulam and lorox is 1:60 ~ 60:1.

2. Herbicidal combinations according to claim 1, is characterized in that: make suspending agent, water dispersible granules by active component and auxiliary material.