CN105340934A - Compound herbicide - Google Patents

Abstract

The invention belongs to the technical field of pesticide and discloses a compound herbicide. The compound herbicide comprises two active components of azimsulfuron and pyriminobac-methyl. The compound herbicide has high efficiency, low toxicity and a wide spectrum and is safe and harmless for crops.

Description

A kind of complex weedicide

Technical field

The invention belongs to technical field of pesticide, specifically contain the complex weedicide of azimsulfuron and KIH 6127.

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:

KIH 6127 (pyriminobac-methyl), this weed killer herbicide is that a kind of inner sucting conduction type specialty that Japanese combinatorial chemistry is researched and developed recently removes barnyard grass agent, belong to pyrimidinylthiobenzoate herbicides, it can by the cauline leaf of weeds and root absorption, and conduct to complete stool rapidly, suppress acetolactate synthestase (ALS) and amino acid whose biosynthesis, thus suppress and hinder the cell division in weeds body, weeds are stopped growing, finally makes weeds albefaction and withered.Effectively prevent and kill off barnyard grass in paddy field and other grassy weeds, the double barnyard grass controlled most of broad leaved weed, some sedge weeds and other weed killer herbicide is produced to resistance.As: barnyard grass, Paspalum distichum, rice Leersia Sw, lady's-grass, agrostis stolonifera, amur foxtail, northeast Tian Mao, wolf tail grass, special-shaped nutgrass flatsedge, sunshine wooden dipper stroke common most weeds such as grass, cyperus iria, firefly Lin, Japanese grass, flat stalk grass, Monochoria vaginalis, Monochoria korsakowii, wild arrowhead, rhizoma alismatis, pondweed, pipewort, needle spikesedge herb, mexicana, Procumbent Falsepimpernel, triquetrousc murdannia herb, alternanthera philoxeroides, paddy field such as flower Lin etc.There is special efficacy to above the average age for marriage barnyard grass and Paspalum distichum, the barnyard grass of 1-7 leaf phase can be killed.

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 KIH 6127 two kinds of active ingredients composite, to reaching above-mentioned effect.

Dispersible oil-suspending agent and refer to that one or more pesticide active ingredients form high dispersive, stable suspension system in non-water system dispersion medium.This formulation has following characteristics: the first, the agricultural chemicals that some oil is very strong to some lipophilies, and particularly insoluble weed killer herbicide in oil, makes oil suspending agent, can play synergistic effect; The second, the permeability of active ingredient and interior absorption can be improved; 3rd, for the active ingredient of part easily degraded in water, make and dispersible the degraded that oil-suspending agent can be good at reducing active ingredient.Meanwhile, dispersible oil-suspending agent owing to wherein with the addition of emulsifier component, organic facies can be made to be distributed to uniformly in water and form small droplet, with the advantage of the formulation such as missible oil, aqueous emulsion.

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 the complex weedicide of azimsulfuron and KIH 6127.

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 and dispersible oil-suspending agent.

In above-mentioned complex weedicide, the weight ratio of azimsulfuron and KIH 6127 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. 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 KIH 6127 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.

The preparation of test medicine:

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.

KIH 6127 solution: accurately take the former medicine 0.0325g of KIH 6127 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, KIH 6127 120ga.i./ha solution, then it is for subsequent use to be diluted to finite concentration.

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

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 KIH 6127 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 KIH 6127 different ratio survey result of the test to the raw of the activity of weeding of barnyard grass

As can be seen from Table 1, composite between two kinds of active ingredients, synergy coefficient (C) is all greater than 13, has obvious synergistic effect to the preventive effect of barnyard grass.

Table 2 azimsulfuron and KIH 6127 different ratio survey result of the test to the raw of the activity of weeding of Monochoria vaginalis

As can be seen from Table 2, composite between two kinds of active ingredients, synergy coefficient (C) has all exceeded 12, has good synergistic effect to the preventive effect of Monochoria vaginalis.

Above-mentioned data can be found out, by azimsulfuron and KIH 6127 composite, with use single medicament compared with, 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 125.5% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 231% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 311% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 412% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 516% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 610% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 718% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 822% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 915.5% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 1025.5% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 1115% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 1232% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 138% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Embodiment 1420% azimsulfuron KIH 6127 dispersibles oil-suspending agent

Above embodiment is selected to carry out the field control effectiveness test of water prevention weeds in paddy field, the effect of annual gramineous weed and broad leaved weed in checking formula water prevention rice field, simultaneously by comparing with KIH 6127 single dose with azimsulfuron, determine composite after synergistic effect, be specifically implemented as follows:

OD) and the test of different agents water prevention herbicides for use in paddy experiment: azimsulfuron KIH 6127 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 (the English formulation abbreviation: OD), 10% KIH 6127 water dispersible granules contrasts, test totally four process, each process three repetition of 10% azimsulfuron water dispersible granules, 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 KIH 6127 and different agents water prevention weeds in paddy field

Above-mentioned data can obviously be found out, azimsulfuron and KIH 6127 composite after, all embodiments are to the preventive effect of barnyard grass and Monochoria vaginalis all more than 86%, and compared to two kinds of single doses, complex preparation wants high a lot of to two kinds of Weed-control effect, the preventive effect of 30 days is compared with the preventive effect of 15 days, all improve, visible complex preparation extends the lasting period, all remarkable to the preventive effect of grassy weed and broad leaved weed, in this test scope of medication, to rice safety.

As can be seen from test data, two kinds of composite rear herbicidal effects to weeds in field of active ingredient, far above the herbicidal effect of two kinds of single doses, can increase drug effect after composite, extend the lasting period of preparation, expand herbicide spectrum, thus reduce the amount of labour of peasant, increase economic efficiency.

Claims (2)

1. a complex weedicide, is characterized in that: active component is made up of azimsulfuron and KIH 6127, and the weight ratio of described azimsulfuron and KIH 6127 is 1:50 ~ 50:1.

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