CN105494397A

CN105494397A - Compound herbicide

Info

Publication number: CN105494397A
Application number: CN201510999335.3A
Authority: CN
Inventors: 杨会营; 刘晓娇; 田胜; 马嵩岳
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 compound herbicide. The compound herbicide is characterized by containing the two active ingredients of azimsulfuron and oxyfluorfen. The compound herbicide is remarkable in synergistic effect, high in fast-acting property, wide in weeding range and long in lasting period.

Description

A kind of complex weedicide

Technical field

The invention belongs to technical field of pesticide, be specifically related to the complex weedicide of azimsulfuron and Oxyfluorfen.

Background technology

Azimsulfuron (Azimsulfuron) molecular formula is C ₁₃h ₁₆n ₁₀o ₅s, the same with other sulfonylurea herbicide, it is the inhibitor of acetolactate synthestase (ALS), the metabolite without activity of weeding is resolved into rapidly in paddy rice body, weeds are then absorbed by root and leaf, conduct in weeds plant body, namely weeds stop growing, leaf look chlorisis, then withered.Effectively can prevent and kill off barnyard grass, northern water hair flower, difformed galingale herb, toothcup, pondweed, weeds such as flower Lin, Europe rhizoma alismatis etc.Structural formula is as follows:

Oxyfluorfen (oxyfluorfen) molecular formula is C ₁₅h ₁₁clF ₃nO ₄, the chloro-1-of chemical name: 2-(3-ethyoxyl-4-nitrophenoxy)-4-trifluoromethylbenzene is the fluorine-containing benzene ether-derivative herbicides that Rhom and Hass of the U.S. succeeds in developing.Oxyfluorfen is contact killing type weed killer herbicide, plays its activity of weeding when there being light, enters in plant corpus mainly through coleoptile, mesocotyl, less through root absorption, and has denier upwards to be transported by root to enter leaf portion.Its activity of weeding improves 5 ~ 10 times than corresponding nitrofen, is 16.32 times of benthiocarb.The scope of application is wide, broad weed-killing spectrum, and the lasting period is long, and mu consumption is few, active high, can use expand herbicide and compose, raising drug effect with multiple mixture of herbicides.Easy to use, both can bud pre-treatment, again can bud post processing, toxicity is low.

Thought by our long-term field efficacy experiment, 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 azimsulfuron and Oxyfluorfen 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 complex weedicide that a kind of herbicidal effect is good, quick-acting is high, the lasting period is long, consumption is few is provided, to reducing peasant's dispenser cost, increasing economic efficiency.Be specifically related to the complex weedicide of azimsulfuron and Oxyfluorfen.

Utilize above-mentioned complex weedicide, be equipped with the known auxiliary agent of those skilled in that art, with the known method of those skilled in that art, can be made into suspending agent, dispersible oil-suspending agent.

In above-mentioned complex weedicide, the weight ratio of azimsulfuron and Oxyfluorfen is 1:50-50:1.

Above-mentioned complex weedicide is mainly used in annual gramineous weed in water prevention rice field and broad leaved weed.

The advantage that above-mentioned complex weedicide has and beneficial effect: 1. weeding scope is wide, can well water prevention rice field annual gramineae and broad leaved weed; 2. complex preparation is to rice safety; 3. two kinds of active ingredients composite after, compared with two kinds of single doses, there is synergistic effect.

Embodiment

In order to verify azimsulfuron and Oxyfluorfen two kinds of active ingredients are composite can good synergistic effect, first applicant tests under room temperature condition of pot, measures herbicidal effect after two kinds of active ingredient different proportion mixtures, evaluates its synergy.

Test selects grassy weed barnyard grass, broad leaved weed Monochoria vaginalis as target weeds.

Test medicine solution: the former medicine of Oxyfluorfen accurately taking the former medicine of constant weight 95% azimsulfuron and 95%, dissolve with appropriate methyl alcohol, add in the clear water containing 0.1% Tween 80 emulsifier, be 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 to the activity of barnyard grass and Monochoria vaginalis, 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) 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

In formula, E is to the actual measurement preventive effect that weeds suppress after two kinds of active ingredient mixtures, E ₀be to the theoretical preventive effect that weeds suppress after two kinds of active ingredient mixtures, X is that azimsulfuron is at this dose to the preventive effect of target weeds, Y is that Oxyfluorfen 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, be synergistic effect when C is greater than 10%, be antagonism when being less than 10%, be addition ± 10% time.

Table 1 azimsulfuron and Oxyfluorfen different ratio survey result of the test to the raw of the activity of weeding of barnyard grass

Upper table can be found out, composite between two kinds of active ingredients, and synergy coefficient (C) is all greater than 11, has obvious synergistic effect to the preventive effect of barnyard grass.

Table 2 azimsulfuron and Oxyfluorfen different ratio survey result of the test to the raw of the activity of weeding of Monochoria vaginalis

Upper table can be found out, composite between two kinds of active ingredients, and synergy coefficient (C) is all greater than 10, has good synergistic effect to the preventive effect of Monochoria vaginalis.

Above-mentioned experimental data can be found out, by azimsulfuron and Oxyfluorfen composite, and use compared with single medicament, have good synergistic effect, the annual gramineae common for paddy field and broad leaved weed have good control efficiency.

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 buy.

Formulation examples is as follows:

Embodiment one: 25.5% azimsulfuron Oxyfluorfen suspending agent

Embodiment two: 31% azimsulfuron Oxyfluorfen dispersibles oil-suspending agent

Embodiment three: 22% azimsulfuron Oxyfluorfen dispersibles oil-suspending agent

Embodiment four: 24% azimsulfuron Oxyfluorfen dispersibles oil-suspending agent

Embodiment five: 30% azimsulfuron Oxyfluorfen suspending agent

Embodiment six: 30% azimsulfuron Oxyfluorfen dispersibles oil-suspending agent

Embodiment seven: 33% azimsulfuron Oxyfluorfen suspending agent

Embodiment eight: 31% azimsulfuron Oxyfluorfen suspending agent

Embodiment nine: 25.5% azimsulfuron Oxyfluorfen dispersibles oil-suspending agent

Above embodiment is selected to carry out the field efficacy experiment of water prevention weeds in paddy field, to determine the effect of annual gramineous weed and broad leaved weed in formula water prevention rice field, simultaneously by comparing with Oxyfluorfen single dose with azimsulfuron, determine composite after synergistic effect, be specifically implemented as follows:

Experiment: azimsulfuron Oxyfluorfen dispersibles oil-suspending agent and the experiment of different preparation water prevention herbicides for use in paddy.Test site is Lingshui county of Hainan Province, time is on March 1st, 2012, field paddy rice is the 7-8 leaf phase, the weeds 3-4 leaf phase, test medicine all prepare according to above-mentioned example and use 10% azimsulfuron to dispersible oil-suspending agent (English formulation title: OD), 35% Oxyfluorfen suspending agent (English formulation title: SC) contrasts, test totally four process, each process three repetition, community randomized arrangement, plot area 100m 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 barnyard grass and the Monochoria vaginalis in field, and visual test medicament occurs without poisoning field paddy rice.Preventive effect calculates according to the following equation:

Result of the test is as following table:

The test of pesticide effectiveness of table 4 azimsulfuron Oxyfluorfen and different agents water prevention weeds in paddy field

Passable as apparent from above-mentioned data, azimsulfuron and Oxyfluorfen composite after, all embodiments to the preventive effect of the common barnyard grass of paddy field and Monochoria vaginalis all more than 88%, relative to two kinds of single doses, complex preparation wants high a lot of to the preventive effect of two kinds of weeds, and both differences are extremely remarkable.Meanwhile, complex preparation is compared with the preventive effect of 15 days the preventive effect of 30 days, all improves, and visible complex preparation extends the lasting period.In this test scope of medication, to rice safety.

Generally speaking, after two kinds of active ingredients are composite, its herbicidal effect is far above the herbicidal effect of azimsulfuron and Oxyfluorfen single dose, complex preparation extends the lasting period of preparation while increasing drug effect, expands herbicide spectrum, thus reduce the amount of labour of peasant, increase economic efficiency.

Claims

1. a complex weedicide, is characterized in that: active component is made up of azimsulfuron and Oxyfluorfen, and the weight ratio of described azimsulfuron and Oxyfluorfen is 1:50 ~ 50:1.

2. complex weedicide according to claim 1, is characterized in that: made suspending agent by active component and auxiliary material, dispersibled oil-suspending agent.