CN104488920A - Wheat paddock weed killer - Google Patents

Abstract

The invention relates to a wheat paddock weed killer. Effective components are pyroxsulam, aminopyralid (or a salt compound thereof) and carfentrazone. The weed killer disclosed by the invention has a synergistic interaction effect, obviously has a better effect of killing the manual weeds of a wheat paddock than a single agent which is used independently and has the advantages of widening the weed killing spectrum, delaying generation of drug resistance of the weeds and alleviating the environmental pollution, and being reduced in dosage.

Description

Wheat field herbicide

Technical field

The invention belongs to technical field of pesticide, being specifically related to a kind of is the weed killer herbicide of active ingredient with pyridine sulphur grass amine, chlorine Fampridine acid (or its esters compound), azoles humulone, especially to shepherd's purse, Descurainia sophia, there is obvious synergistic function, be applicable to prevent and kill off wheat paddock especially with the wheat paddock annual weed that shepherd's purse, Descurainia sophia are advantage weeds.

Background technology

Pyridine sulphur grass amine (pyroxsulam) sulfonamides inner sucting conduction type, selectivity winter wheat field herbicide after seedling, broad weed-killing spectrum, activity of weeding are high, drug action is fast.This medicine is via grass cutting blade, sheath portion, stem or root absorption, accumulate at growing point, suppress acetolactate synthestase, branched-chain amino acid cannot be synthesized, and then affect protein synthesis, affect weeds cell division, cause weeds to stop growing, yellow, then dead, better to preventive effects such as amur foxtail, wild oat, chickweed, shepherd's purses.

Chlorine Fampridine acid (aminopyralid), for picolinic acid class new herbicides, be mainly used in preventing and kill off annual and perennial broad leaved weed, be widely used in mountain region, grassland, the preventing and kill off of planting site and uncultivated area weeds, the acid of chlorine Fampridine is reacted to potassium hydroxide, sodium hydroxide, ammoniacal liquor etc. and can also be obtained corresponding salt.

Azoles humulone (carfentrazone-ethyl) is the triazolineone weed killer herbicide of rich U.S. real exploitation, by the accumulation suppressing proporphyrinogen oxidase to cause poisonous intermediate, thus destroys the cell membrane of weeds, makes blade withered, dead rapidly.Namely carfentrazoneethyl is absorbed by plant leaf blade in 15 minutes after spray medicine, it is not drenched with rain affects, after 3-4 hours just there is poisoning symptom in weeds, 2-4 days dead, have excellent imitation to clearvers, piemarker, red heart lamb's-quarters, shepherd's purse, wartwort, corn gromwell, the blank pipe weeds such as to lead a cow, the weeds etc. sulfonylurea herbicide being produced to resistance have good activity.

The present inventor conducts in-depth research pyridine sulphur grass amine, the acid of chlorine Fampridine and salt compounds, azoles humulone mixture, find that pyridine sulphur grass amine, the acid of chlorine Fampridine and salt compounds thereof, azoles humulone mixture have Synergistic to respond to target weeds, especially have obvious Synergistic to respond to shepherd's purse (Capsella bursa-pastoris), Descurainia sophia (Descurainia sophia).

Pyridine sulphur grass amine, chlorine Fampridine acid and salt compounds, azoles humulone ternary built be applied to preventing and kill off without relevant report of wheat paddock annual weed.

The present invention possesses the prospect of industrial applications, by certain technological means, can excipient for ease of the formulation of agricultural use, as suspending agent, oil-suspending agent, water dispersible granules, wetting powder, effervescent tablet, granulae effervescentes etc.

Summary of the invention

The object of the invention is to problem when solution prior art Pesticides single dose is used alone, weeds easily developed immunity to drugs and weeding is thorough, control efficiency is poor, a kind of efficient, wide spectrum, economy, safety are provided, are conducive to the weed killer herbicide of the weeds of wheat comprehensive regulation.

Technical scheme of the present invention is: a kind of for wheat field herbicide, active ingredient is pyridine sulphur grass amine, the acid of chlorine Fampridine and salt compounds, azoles humulone, the percentage by weight of pyridine sulphur grass amine in weed killer herbicide is 0.1% ~ 20%, the acid of chlorine Fampridine and the percentage by weight of salt compounds in weed killer herbicide thereof are 0.1% ~ 50%, the percentage by weight of azoles humulone in weed killer herbicide is 0.1% ~ 20%, and all the other are allow in agricultural chemicals to use and acceptable auxiliary element.

Described weed killer herbicide can according to well known to a person skilled in the art method, select suitable pesticidal preparations auxiliary element, the application forms that the applicable agricultural productions such as suspending agent, oil-suspending agent, water dispersible granules, wetting powder, effervescent tablet, granulae effervescentes use can be processed into.

The auxiliary element that the present invention uses comprises wetting agent, stabilizing agent, dispersant, disintegrant, thickener, pH adjusting agent, defoamer, antifreezing agent, filler etc., be all auxiliary agent conventional in Pesticide formulation, concrete composition and consumption are determined by test according to recipe requirements.

Weed killer herbicide provided by the invention, is applicable to prevent and kill off wheat paddock annual weed.

The frequency of administration of composition provided by the invention and amount of application change with crops, weeds, weather condition and have small variations, can by the object using suitable dosage reach effectively control.

Product described in the invention can the form of finished product preparation provide, and namely in composition, each material mixes, and the composition of composition also can the form of single dose provide, and directly mixes in tank or bucket, be then diluted to required concentration before using.

Weed killer herbicide of the present invention expands herbicide spectrum, the combination of three kinds of active ingredients has Synergistic response to target, especially to shepherd's purse (Capsella bursa-pastoris), Descurainia sophia (Descurainiasophia), there is the response of obvious Synergistic, excellent fix can be provided for preventing and kill off of wheat paddock annual weed, especially shepherd's purse (Capsella bursa-pastoris), Descurainia sophia (Descurainiasophia) wheat paddock that is advantage weeds, has positive effect for the weeds of wheat comprehensive regulation.

Embodiment

In order to make object of the present invention, technical scheme and advantage more short and sweet, the following specific embodiment of the present invention is described, but the present invention is only limitted to absolutely not these examples.The following stated is only the good embodiment of the present invention, only for describing the present invention, can not be interpreted as the restriction to scope of the present invention.It should be pointed out that all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Example of formulations 1:50% pyridine sulphur grass amine chlorine Fampridine acid potassium salt azoles humulone water dispersible granules.

Above-mentioned material is added in cone-type mixer together and mixes; pulverize by airslide disintegrating mill; material after pulverizing mixes through cone-type mixer again; mixed fineness of materials 98% is by 600 mesh standard sieves; add in kneader and be kneaded into plasticity material; finally this material is put into Squeezinggranulator extruder grain, after drying, screening, after granulation, namely obtain 50% pyridine sulphur grass amine chlorine Fampridine acid potassium salt azoles humulone water dispersible granules.

Example of formulations 2:40% pyridine sulphur grass amine chlorine Fampridine acid sodium-salt azoles humulone wetting powder.

Above-mentioned material is added in cone-type mixer together and mixes, pulverize by airslide disintegrating mill, material after pulverizing is again through cone-type mixer mixing, and mixed fineness of materials 98%, by 600 mesh standard sieves, obtains 40% pyridine sulphur grass amine chlorine Fampridine acid sodium-salt azoles humulone wetting powder.

Example of formulations 3:35% pyridine sulphur grass amine chlorine Fampridine acid azoles humulone suspending agent.

Pulverized in advance in proportion by above-mentioned formula, then add in sand mill and grind, after high shear mixing, allotment obtains 35% pyridine sulphur grass amine chlorine Fampridine acid azoles humulone suspending agent.

Example of formulations 4:28% pyridine sulphur grass amine chlorine Fampridine acid azoles humulone oil-suspending agent

Above-mentioned material (except organobentonite) is joined in reactor mixer together, stir 2 hours, open pan feeding valve at the bottom of still, material is injected stage sand grinding machine to grind, fineness of materials 98% after grinding is by discharging after 1-5um, material puts into high-shear emulsifying still again together with the organobentonite dissolved in advance, namely can be made into the 28% pyridine sulphur grass amine chlorine Fampridine acid azoles humulone oil-suspending agent that flowing to property is good after emulsification.

Assays Example 1: pyridine sulphur grass amine, the acid of chlorine Fampridine, azoles humulone and the test of the composite Toxicity Determination to shepherd's purse (Capsella bursa-pastoris), Descurainia sophia (Descurainia sophia) thereof.

Evaluate weed killer herbicide associated form (NY/T 1155.7-2006) according to Colby method, its formula is as follows:

$E_0=\frac{A\×B\×C...N}{{100}^{(n-1)}}$

In formula:

A be pyridine sulphur grass amine alone with certain dosage time fresh weight inhibition to target weeds;

B be the acid of chlorine Fampridine alone with certain dosage time fresh weight inhibition to target weeds;

C be azoles humulone alone with certain dosage time fresh weight inhibition to target weeds;

N is the weed killer herbicide kind number of mixture;

E ₀for the theoretical value to target weeds fresh weight inhibition when pyridine sulphur grass amine, the acid of chlorine Fampridine, azoles humulone three kinds of pharmacy mix;

Be the measured value of contrast to target weeds fresh weight inhibition when E is pyridine sulphur grass amine, the acid of chlorine Fampridine, azoles humulone three kinds of pharmacy mix.

Evaluation criterion: work as E ₀during ﹣ E > 10%, be expressed as synergistic function; As ﹣ 10%≤E ₀during ﹣ E≤10%, show as collaborative summation action; Work as E ₀during ﹣ E < ﹣ 10%, show as joint action of antagonism.

Table one, pyridine sulphur grass amine, the acid of chlorine Fampridine, azoles humulone and the composite Toxicity Determination result to shepherd's purse (Capsellabursa-pastoris) thereof

Evaluate weed killer herbicide associated form according to Colby method, table two data show, and pyridine sulphur grass amine, chlorine Fampridine are sour, azoles humulone triple combination is remarkable to Descurainia sophia (Descurainia sophia) synergistic effect, E ₀-E value is all greater than 20%.

Table two, pyridine sulphur grass amine, the acid of chlorine Fampridine, azoles humulone and the composite Toxicity Determination result to Descurainia sophia (Descurainiasophia) thereof

Evaluate weed killer herbicide associated form according to Colby method, table three data show, and pyridine sulphur grass amine, chlorine Fampridine are sour, azoles humulone triple combination is remarkable to Descurainia sophia (Descurainia sophia) synergistic effect, E ₀-E value is all greater than 20%.

Assays Example two: prevent and kill off wheat paddock annual weed field control effectiveness test.

Table three, prevent and kill off wheat paddock annual weed field control effectiveness test result

In sum, instant component is reasonable, the chlorine Fampridine acid of pyridine sulphur grass amine and salt compounds azoles humulone triple combination thereof have Synergistic response, especially shepherd's purse (Capsellabursa-pastoris), Descurainia sophia (Descurainia sophia) has remarkable synergy response, expand herbicide spectrum, for wheat paddock is especially with shepherd's purse (Capsella bursa-pastoris), the wheat paddock that Descurainia sophia (Descurainia sophia) is advantage weeds provides excellent weed control solution, be applicable to prevent and kill off wheat paddock annual weed.

Claims (4)

1. a wheat field herbicide, it is characterized in that: active ingredient is pyridine sulphur grass amine, chlorine Fampridine acid (or its esters compound), azoles humulone, the percentage by weight of pyridine sulphur grass amine in weed killer herbicide is 0.1% ~ 20%, and chlorine Fampridine acid (or its esters compound) percentage by weight in weed killer herbicide is 0.1% ~ 50%, the percentage by weight of azoles humulone in weed killer herbicide is 0.1% ~ 20%.

2. a kind of wheat field herbicide according to claim 1, is characterized in that: described weed killer herbicide also contains pesticidal preparations auxiliary element, to make the application forms of applicable agricultural use.

3. a kind of wheat field herbicide according to claim 2, is characterized in that: its formulation is the one in suspending agent, oil-suspending agent, water dispersible granules, wetting powder, effervescent tablet, granulae effervescentes.

4. a kind of wheat field herbicide according to claim 1 is characterized in that preventing and kill off the application in wheat paddock annual weed.