CN105325444A

CN105325444A - Pesticide composition

Info

Publication number: CN105325444A
Application number: CN201510719639.XA
Authority: CN
Inventors: 杨会营; 刘晓娇; 田胜
Original assignee: Beijing Yanhua Yongle Biotechnology Co Ltd
Current assignee: Yanhua Yongle (Leting) Biological Technology Co. Ltd.
Priority date: 2015-10-29
Filing date: 2015-10-29
Publication date: 2016-02-17

Abstract

The invention belongs to the technical field of pesticide, and discloses a pesticide composition. The pesticide composition is characterized by being prepared from two active components azimsulfuron and fluroxypyr, and the pesticide composition can be prepared into emulsion in water and dispersable oil suspended agent. The pesticide composition is remarkable in synergistic effect, wide in weeding range, lasting in effect and safe and free of pesticide harms for rice.

Description

A kind of composition pesticide

Technical field

The invention belongs to technical field of pesticide, specifically contain the composition pesticide of azimsulfuron and fluroxypyr.

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.

Fluroxypyr (fluroxypyr) belongs to inner sucting conduction type herbicide after seedling, is absorbed by plants very soon after medicine, makes sensitive plant occur the reaction of classical hormones class weed killer herbicide, plant deformity, distortion.Temperature without impact, but affects the speed that its drug effect plays to the final effect of its weeding, and generally when temperature is low, drug effect plays comparatively slow, stops growing after can making dunsiekte, but dead immediately, and after temperature raises, plant is very fast dead.To Crop securify, do in object in resistance, toxicity can be lost in conjunction with conjugates, easily degrade in soil, half life period is shorter, poisoning can not be caused to succession crop, the various broad leaved weeds such as clearvers, volume stem knotweed, kitchen garden, black nightshade, chickweed, common vetch, field bindweed, weasel hemp nettle, pale persicaria, willow leaf thorn knotweed, Amaranthus retroflexus, dayflower, elscholtiza, penny cress, vetch, Descurainia sophia and little japanese bearbind can be prevented and kill off, to grass family and sedge weed invalid.

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 fluroxypyr 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 composition 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 azimsulfuron and the composite composition pesticide of fluroxypyr.

Utilize above-mentioned composition pesticide, 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 and dispersible oil-suspending agent, aqueous emulsion.

In above-mentioned composition pesticide, the weight ratio of azimsulfuron and fluroxypyr is 1:30-30:1.

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

The advantage that above-mentioned composition pesticide has and beneficial effect: 1. expand herbicidal spectrum, weeding scope is wide, can well water prevention rice field annual gramineae and broad leaved weed; 2. adhesive force improves, and penetrability strengthens; 3. complex preparation is to rice safety; 4. 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 fluroxypyr 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.

Azimsulfuron solution: accurately take the former medicine 0.0325g of azimsulfuron of 95%, dissolve with the methyl alcohol of 0.2ml, join 400ml and contain in the clear water of 0.1% Tween 80 emulsifier, be stirred to evenly, azimsulfuron 120ga.i./ha solution, then it is for subsequent use to be diluted to finite concentration.

Fluroxypyr solution: accurately take the former medicine 0.0325g of fluroxypyr of 95%, dissolve with 0.2ml methyl alcohol, join 400ml and contain in the clear water of 0.1% Tween 80 emulsifier, be stirred to evenly, fluroxypyr 120ga.i./ha solution, then it is for subsequent use to be diluted to finite concentration.

Placebo solution: the methyl alcohol of 0.2ml is joined 400ml and contain in the water of the Tween 80 emulsifier of 0.1%.

Test method is as follows: after adopting the inspection of gowing method mixed, medicament is to the activity of barnyard grass, 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) 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 azimsulfuron is at this dose to the preventive effect of target weeds, Y is that fluroxypyr 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 azimsulfuron and fluroxypyr 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 13, has synergistic effect clearly to the preventive effect of barnyard grass.

Table 2 azimsulfuron and fluroxypyr 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 13, has obvious synergistic effect to the preventive effect of Monochoria vaginalis.

Above-mentioned experimental data can be found out, by azimsulfuron and fluroxypyr composite, and use compared with single medicament, have good synergistic effect.Composite between active ingredient solves if fluroxypyr is to shortcomings such as grassy weed preventive effect are invalid, and 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 131% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 221% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 311% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 420% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 520% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 611% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 710.5% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 815.5% azimsulfuron fluroxypyr aqueous emulsion

Embodiment 912% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 1030% azimsulfuron fluroxypyr aqueous emulsion

Embodiment 1136% azimsulfuron fluroxypyr dispersibles oil-suspending agent

Embodiment 1215% azimsulfuron fluroxypyr dispersibles oil-suspending agent

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

OD) and the experiment of different agents water prevention herbicides for use in paddy experiment: azimsulfuron fluroxypyr dispersibles oil-suspending agent (English formulation abbreviation:.Test site is Lingshui county of Hainan Province, time is on March 1st, 2014, field paddy rice 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% azimsulfuron to dispersible oil-suspending agent (English formulation abbreviation: OD), 20% fluroxypyr dispersibles oil-suspending agent (English formulation abbreviation: OD) contrast, 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 fluroxypyr OD and different agents water prevention weeds in paddy field

Passable as apparent from above-mentioned data, azimsulfuron and fluroxypyr composite after, all embodiments to the preventive effect of barnyard grass and Monochoria vaginalis all more than 87%, relative to two kinds of single doses, complex preparation wants high a lot of to two kinds of Weed-control effect, difference and significantly, simultaneously, after complex preparation medicine, the preventive effect of 30 days is compared with the preventive effect of 15 days, all improves, and visible complex preparation extends the lasting period.

In sum, after two kinds of active ingredients are composite, expand herbicidal spectrum, extend the lasting period, synergistic effect is remarkable, while minimizing consumption, reduces peasant's use cost.In this test scope of medication, to rice safety.

Claims

1. a composition pesticide, is characterized in that: active component is made up of azimsulfuron and fluroxypyr, and the weight ratio of described azimsulfuron and fluroxypyr is 1:30 ~ 30:1.

2. composition pesticide according to claim 1, is characterized in that: be made up of active component and auxiliary material and dispersible oil-suspending agent, aqueous emulsion.