CN109042668B

CN109042668B - Mixed herbicide containing fluroxypyridine ester and fluroxypyr and application thereof

Info

Publication number: CN109042668B
Application number: CN201810892568.7A
Authority: CN
Inventors: 汪云强; 朱怀铜; 吴文静; 梅洪玲; 张传奇; 夏葵; 唐远
Original assignee: Anhui Huilong Group Yinshan Pharmaceutical Co ltd
Current assignee: Anhui Huilong Group Yinshan Pharmaceutical Co ltd
Priority date: 2018-08-07
Filing date: 2018-08-07
Publication date: 2021-04-02
Anticipated expiration: 2038-08-07
Also published as: CN109042668A

Abstract

The invention provides a mixed herbicide containing fluroxypyridine ester, fluroxypyr and derivatives thereof and application thereof; the active ingredients consist of fluroxypyr and fluroxypyr, the weight ratio of the fluroxypyr to the fluroxypyr is 1-20: 1-60; can be used for preventing and treating broadleaf weeds, gramineous weeds and nutgrass flatsedge.

Description

Mixed herbicide containing fluroxypyridine ester and fluroxypyr and application thereof

Technical Field

The invention belongs to the field of pesticides, and particularly relates to a mixed herbicide containing fluroxypyridine ester and fluroxypyr and application thereof.

Background

The fluroxypyridine ester is a novel aryl picolinic acid herbicide, is a second novel compound in the herbicides following the fluroxypyridine ester, and can effectively prevent and kill gramineous weeds such as barnyard grass, paspalum, cockspur grass, moleplant seed and the like in a paddy field, cyperaceae weeds such as cyperus rotundus, cyperus esculentus, cyperus rotundus and day-light fimbristylis, broad-leaved weeds such as piemarker, rhizoma alismatis, amaranth, ragweed, chenopodium album, horseweed herb, mother grass, ludwigia octovalvis, monochoria indica, xanthium sibiricum and the like. After the herbicide is applied, the herbicide is absorbed by the leaves and root systems of the weeds, has systemic property, can be conducted through xylem and phloem, and is accumulated in meristems of the weeds, so that the herbicidal activity is exerted. Due to the novel action mechanism, the weed herbicide can solve the known weed resistance problem, is environment-friendly and is safe to other organisms.

Fluroxypyr is a systemic conduction type post-emergence herbicide, and is quickly absorbed by plants after being applied, so that sensitive plants have the reaction of typical hormone herbicides, and the plants are deformed and twisted and finally die. The weeding composition is suitable for preventing and killing broadleaf weeds in wheat, barley, corn, grapes, orchards, pastures, forest lands, lawns and the like; such as cleavers, polygonum convolvulus, purslane, black nightshade, bindweed, polygonum, amaranth and the like, and is ineffective to gramineous weeds.

The compounding of the herbicides can solve the problems of high toxicity and poor effect of a single pesticide, the investment is low, the research and development period is short, the generation of drug resistance of an agent can be delayed by the interactive use of different pesticides, and the herbicide has an ideal use effect, so that the compounding of the pesticides with different action mechanisms is a research hotspot in the field of pesticides at present. In the prior art, a herbicidal composition compounded by fluroxypyr and fluroxypyr is not available.

Disclosure of Invention

The invention aims to provide a herbicide composition which has reasonable components, low application cost and difficult drug resistance, has better control effect on gramineous weeds, broadleaf weeds and nutgrass flatsedge, and has positive effects on the aspects of retarding the resistance of the weeds, reducing the dosage of the drugs and the like.

The present invention provides the following technical solutions

The active ingredients of the mixed herbicide containing the fluroxypyridine ester and the fluroxypyr consist of the fluroxypyridine ester and the fluroxypyr, and the weight ratio of the fluroxypyridine ester to the fluroxypyr is 1-20: 1-60.

The weight ratio of the fluroxypyr-meptyl to the fluroxypyr is 1-10: 10-50. Preferably, the weight ratio of the fluroxypyridine ester to the fluroxypyr is 1: 3.

The total weight percentage of the fluroxypyr-meptyl and the fluroxypyr in the mixed herbicide is 1-90%. Preferably, the total weight percentage of the fluroxypyr-meptyl and the fluroxypyr in the composition is between 15 and 75%.

The weeding composition provided by the invention can be prepared into various application formulations suitable for agriculture by a known method, such as one of wettable powder, suspending agent, microemulsion, aqueous emulsion, water dispersible granules, missible oil, suspoemulsion, dispersible oil suspending agent, soluble solution and the like. The better preparation forms comprise suspending agents, oil suspending agents, water dispersible granules, wettable powder and the like, and the production process of various application preparation forms belongs to the prior known technology.

The suspending agent comprises the following components in percentage by weight: 1-30% of fluroxypyridine ester, 1-60% of fluroxypyr, 1-15% of dispersant, 1-15% of wetting agent, 1-3% of thickening agent, 1-2% of antifreezing agent, 1-3% of defoaming agent and deionized water carrier, and the balance is up to 100%. The specific production steps are as follows: mixing the effective components with other auxiliary agents, and forming a highly dispersed and stable suspension system in a water system medium after high-speed shearing dispersion and sanding in a sand mill to prepare the suspending agent with corresponding weight percentage content.

The oil suspending agent comprises the following components in percentage by weight: 1-30% of fluroxypyridine ester, 1-60% of fluroxypyr, 1-14% of dispersant, 1-10% of wetting agent, 1-3% of thickening agent and the balance of liquid carrier to 100%. The specific production steps are as follows: mixing the effective components with other auxiliary agents, and forming a highly dispersed and stable suspension system in an oil system medium after high-speed shearing dispersion and sanding in a sand mill to prepare the oil suspending agent with corresponding weight percentage content.

The water dispersible granule comprises the following components in percentage by weight: 1-30% of fluroxypyridine ester, 1-60% of fluroxypyr, 1-12% of dispersant, 1-15% of wetting agent, 1-5% of disintegrant and solid carrier, and the balance is up to 100%. The specific production steps are as follows: the active ingredients and other auxiliary agents are uniformly mixed, crushed by an ultramicro jet mill, kneaded, and then added into a fluidized bed granulation dryer for granulation, drying and screening to prepare the water dispersible granules with corresponding weight percentage content.

The wettable powder comprises the following components in percentage by weight: 1-30% of fluroxypyridine ester, 1-60% of fluroxypyr, 1-15% of dispersant, 1-10% of wetting agent and the balance of solid carrier to 100%. The specific production steps are as follows: mixing the effective components with other auxiliary agents, mechanically crushing, then carrying out airflow crushing, and uniformly mixing to prepare the wettable powder with corresponding weight percentage content.

The defoaming agent can be one or more of silicone compounds, epoxidized soybean oil, methanol, silicone oil and the like.

The antifreezing agent can be one or more of glycerol, propylene glycol, diethylene glycol, urea and the like.

The wetting agent can be one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium butyl naphthalene sulfonate, sodium alkyl sulfonate, tea seed cake powder, fructus Gleditsiae Abnormalis powder, and fructus Sapindi Mukouossi powder.

The dispersing agent can be one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, naphthalenesulfonate formaldehyde condensate, p-methoxyl fatty amide benzene sulfonic acid, lignosulfonate, polycarboxylate, alkylphenol polyoxyethylene ether sulfate, calcium alkylbenzene sulfonate, fatty acid ester sulfate, alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and the like.

The disintegrant can be one or more of sodium carboxymethyl starch, low-substituted hydroxypropyl cellulose, croscarmellose sodium, crospovidone, chitosan, sodium alginate sodium bicarbonate, magnesium chloride, aluminum chloride, sodium chloride, urea, ammonium sulfate, bentonite, etc.

The thickener can be one or more of polyvinyl acetate, xanthan gum, gelatin, gum arabic, magnesium aluminum silicate, phenolic resin, hydroxymethyl cellulose, sodium alginate, etc.

The solid carrier can be one or more of light calcium carbonate, argil, kaolin, diatomite, bentonite, white carbon black, clay, attapulgite, talcum powder, quartz sand and the like.

The liquid carrier can be one or more of refined soybean oil, corn oil, rapeseed oil, turpentine, methyl oleate, coconut oil, palm oil, etc.

The deionized water is industrial deionized water.

The mixed herbicide is used for preventing and killing weeds. Preference is given to paddy fields, wheat fields of the Gramineae type, broad-leaved weeds and sedges, such as Stellaria, Phaseolus, Agrostis, digitaria, Avena, Setaria, Sinapis, Lolium, Solanum, Bromus, Aleuroca, Matricaria, Chrysanthemum, Sida, Xanthium, Amaranthus, Chenopodium, Ipomoea, Chrysanthemum, Galium, Viola and Veronica.

The invention has the following beneficial technical effects:

the composition combines two active ingredients with different action mechanisms, can effectively reduce the generation of drug resistance of weeds, and expands the weed control spectrum; can simultaneously prevent and kill grassy weeds, broadleaf weeds, nutgrass flatsedge weeds and other weeds.

The weeding composition provided by the invention has a remarkable synergistic effect, the dosage of a single compound is reduced, a good action level is maintained, the weed control spectrum is remarkably broadened, and the environmental pollution is reduced.

Detailed Description

The following detailed description of specific embodiments of the present invention is provided in conjunction with examples, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Example 1: and (3) measuring the indoor toxicity of the purslane by using fluroxypyr and fluroxypyr.

The test method comprises the following steps: spraying stem and leaf. After 21 days of treatment, fresh weight is measured, and control effect is calculated.

Herbicide combinations were evaluated according to the Colby method. Evaluation criteria: when E-E0 is more than 10%, the synergistic effect is expressed; when the concentration is more than or equal to-10 percent and less than or equal to E-E0, the additive effect is shown; when E-E0 is < -10%, it shows antagonistic action.

TABLE 1 indoor toxicity assay for Portulaca oleracea by combination of fluroxypyridine and fluroxypyr

As shown in the table above, the combination of the fluroxypyr and the fluroxypyr has obvious synergistic effect on the purslane, can effectively reduce the using dosage of pesticides and slow down the generation of drug resistance of weeds, and the weight ratio of the fluroxypyr to the fluroxypyr is preferably 1-10: 10-50; particularly preferably, the weight ratio of the fluroxypyr-meptyl to the fluroxypyr is 1: 3.

Example 2 formulation example

Preparation 1: 32% fluroxypyridine ester fluroxypyr oil suspending agent

Preparation 2: 30% fluroxypyridine ester fluroxypyr suspension

Preparation 3: 60% fluroxypyridine ester and fluroxypyr wettable powder

Preparation 4: 44% fluroxypyridine ester fluroxypyr water dispersible granule

Example 3 the combination of fluroxypyr-meptyl and fluroxypyr has a weed field control effect.

Test subjects: barnyard grass, cyperus heterophyllus, purslane, amaranthus hydropiper, cyperus rotundus, monochoria sinensis, cleavers and the like.

Test agents: formulations 1-4 and control Agents

The test method comprises the following steps: weighing the agents according to the area of a test cell, diluting the agents by adding water, spraying stems and leaves for 1 time by using a knapsack sprayer when weeds are in a 2-3 leaf stage, investigating fresh-weight control effect after 21 days, and comparing the weeding activity of various agents. Control effect (%) - (fresh weight of weeds in clear water control group-fresh weight of weeds in treated group)/fresh weight of weeds in clear water group ] 100%.

TABLE 2 field control of fluroxypyr and fluroxypyr matched pairs

As can be seen from the above table, compared with a single dose, the compound application of the fluroxypyr and the fluroxypyr can expand the weeding spectrum, and can significantly improve the control effect of the fluroxypyr on weeds, have significant synergistic effect, can effectively reduce the application dosage of pesticides, and reduce environmental pollution; and is safe for crops in field observation.

The above description is only a preferred embodiment of the present invention, and it is obvious to those skilled in the art that modifications may be made without departing from the scope of the present invention, and such modifications are also within the scope of the present invention.

Claims

1. The application of the mixed herbicide containing the fluroxypyridine ester and the fluroxypyr in preventing and treating the purslane is characterized in that: the active ingredients consist of fluroxypyr-meptyl and fluroxypyr, the weight ratio of the fluroxypyr-meptyl and the fluroxypyr is 1: 3.

2. Use according to claim 1, characterized in that: the total weight percentage of the fluroxypyr-meptyl and the fluroxypyr in the composition is 1 to 90 percent.

3. Use according to claim 2, characterized in that: the total weight percentage of the fluroxypyr-meptyl and the fluroxypyr in the composition is 15-75%.

4. Use according to any one of claims 1 to 3, characterized in that: the composition can be one of wettable powder, suspending agent, missible oil, dispersible oil suspending agent, soluble solution, suspoemulsion, microemulsion, emulsion in water and water dispersible granule.