DE3803182A1 - POSTAL HERBICIDAL MIXTURE AND METHOD FOR ITS APPLICATION - Google Patents

Abstract

Herbicidal composition for post-emergent application in corn comprising as active ingredient ethyl ester of N-(4-chloro-6-ethylamino-1,3,5-triazin-2-yl)-glycine and 3-isopropyl-(1H)-benzo-2,1,3-thiadiazin-4-one-2,2-dioxide at a ratio of 1:10 to 10:1.

Description

The invention relates to a herbicide mixture for use in cereal crops rising, the N- (4-chloro-6-ethylamino-1,3,5- triazin-2-il) glycine ethyl ester (eglinazine-ethyl) and 3-isopropyl- (1H) -benzo-2,1,3-thiadiazin-4-one 2,2-dioxide (Bentazon) contains.

The herbicidal preparations according to the invention contain a mixture of the active ingredients in quantities from 0.1-98% by volume and in the proportion of (1:10) - (10: 1). They will be in grain crops for eradicating the weeds postemergent in quantities from 1-8 kg / hectare, to the total amount of Active ingredients calculated, used.

The control of weeds with chemicals has been practiced for a long time. Of the longest herbicides used in cereal crops, 2,4-D and its derivatives and (4-chloro-O-tolyl) oxy] -acetic acid (MCPA). These active ingredients destroy z. B. successfully such weeds, such. Chenopodium species and thistles (Cirsium arvense).

When using hormonal preparations is especially committed to environmental protection because the herbicides polluting the environment in the neighboring cultures, in living  Watering and in the natural plant cover can cause great damage. Height Grain harvest results can only be achieved with the cultivation of intensive cereals. The sorts are mostly against herbicides with hormone effect sensitive. The grain tolerates the herbicides only at a suitable time. The Time of treatment and the means used are therefore to choose carefully because the applied at an inappropriate time Spraying and an unsuitable preparation one cause significant crop failure.

As a result of technical development agriculture numerous systemic or contact agents for eradicating mono- or dicotyledons or their combinations Available. As a result of the regular Weed killing with chemicals are from the Grain seeds single weed species disappeared and by chemical-resistant weeds been replaced. Such hard to eradicate Weeds are z. B. the wild oat varieties (Avena spp.) And the lab herbaceous species (Galium spp.) etc. By simple means with hormone action These plants are difficult or impossible  exterminate. In the cereal crops was in the past decades already an increase monocotyledonous weeds observed. this has its cause in the spread of monocultures, in the method of mechanical harvesting and in other factors. To those propagated in the grain Monocotyledons include z. The weeds Apera spica-venti, Poa trivialis, Alopecurus mycouroides etc. Besides the monocotyledonous weeds Of course, there are also dicotyledonous weeds in the Cereals, the weed eradication was so by makes it difficult to and dicotyledons.

There are several herbicide herbicides for weed eradication. Active ingredients available. The their basis forming active ingredients and their herbicidal effects show Tables I and II.

(Gyomirtás-vegyszeres term'sszabályozás. Mezógazdasági Kiadó / 1983 / S. 199)

International names and chemical names of the herbicides mentioned International name Chemical name bentazone 3-isopropyl- (1,4) -benzo-2,1,3-thiadiazin-4-one-2,2-dioxide Eglinazine-ethyl N- (4-chloro-6-ethylamino-1,3,5-triazin-2-il) -glyzinethylester 2,4-D 2,4-dichloro-phenoxyacetic acid chlorotoluron N- (3-chloro-4-methyl-phenyl) -N ', N'-dimethyl-urea isoproturon N- (4-Isopropyl-phenyl) -N ', N'-dimethyl-urea terbutryn 4-ethylamino-2-tert-butylamino-5-chloro-1,3,5-triazine Falmprop-methyl N-benzoyl-N- (3-chloro-4-fluorophenyl) -2-amino-propionic acid ethyl ester Pendimetalin N- (1-ethyl-propyl) -3,4-dimethyl-2,6-dinitroaniline Difensoquat 1,2-dimethyl-3,5-diphenyl-1H-pirazolium methylsulphate MCPA 2-methyl-4-phenoxiessigsäure

Table II

Herbicides for the eradication of monocotyledonous and dicotyledonous weeds

Table II above shows that the Weed control with chemicals in general by the sensitivity or resistance the weeds present in the crop the individual herbicidal active ingredients is determined.

The object of the invention is the elaboration a postemergent combination with enough broad weed killing effect against the in cereal seed occurring, most common mono- and dicotyledonous weeds.

The combination of eglinazine with bentazone possesses an effect, which one due to the Weed killing effect of the two components could not expect. The weed killing effect of bentazone and eglinazine So look at the following weeds:

Poa trivialis
Apera spica-venti
Galium aparine
Matricaria inrolon
Avena fatus
Alopecurus myosuroides

The invention therefore relates to herbicidal preparations, those from biologically active agents as well as solid or liquid carriers  or liquid carriers and optionally a mixture of ionic and / or nonionic Emulsifiers exist and those as active ingredient 0.1-95 mass% and in (1:10) (10: 1) mass ratio N- (chloro-6-ethylamino-1,3,5-triazin-2-il) - glycine ethyl ester and 3-isopropyl- (1H) -benzo-2,1,3- thiadiazin-4-one-2,2-dioxide mixed.

From the preparation according to the invention is postemergent in the cereal seed field to the active ingredient mixture counted 1-8 kg per hectare spread.

The one herbicide of the invention Eglinazine ethyl is used in cereals in amounts of 3 kg of active ingredient / hectare used and proved as particularly effective against Apera spica-venti and Matricaria spp.

The eglinazine ethyl has H. Bredecken and Employee studies (Angewandte Chemie, Volume 75, No. 18, pp. 825-850), and its production becomes z. B. in DE 20 32 861 described.

Bentazon is a known contact Herbicide and becomes successful in cereal crops used. The amount usually used is 1.2-2.2 kg / ha, in 225-500 l Postemergent sprayed water (Pesticide Manual,  Issue 7, 1983, page 232).

The production of bentazone Anthranilic acid and isopropyl sulfamoyl chloride is described in DE 21 05 687.

The preparation according to the invention is in the form of directly sprayable solutions, powders, Suspensions, dispersions, emulsions, oil dispersions, Pastes, Atomizing Granules Spraying, sprinkling, spraying or sprinkling applied. The form of preparation depends on Application, and it is always appropriate a very fine distribution of the active ingredient to secure. For the production of directly sprayable Solutions, emulsions, pastes or oil emulsions you can aliphatic or aromatic hydrocarbons, their derivatives, eg. Benzene, toluene, Xylene, ethanol, propanol, butanol, strongly polar Solvents, such as methyl ethyl ketone, dimethylformamide, Use water etc. The watery Preparations are made from emulsion concentrates, pastes or wettable powders (spray powders), oil dispersions made with the addition of water. For the preparation of emulsions, pastes or oil dispersions be the active substances in or in Dissolved oil or solvents and with the addition of  Wetting, adhesion, dispersing or emulsifying agents and optionally solvents or oil Concentrates are produced that mix with water let dilute. Of the surface active Means is the mixture of sodium lignosulfate, Laurylsulfate sodium, ethoxylated nonylphenol and dodecylsulfonic acid calcium salt. Powder, atomizing and scattering agents are by mixing the active ingredients with solid carriers manufactured.

Granules, such. B. impregnated and homogeneous Granules are obtained by adsorption of the active ingredients obtained on solid supports. Solid carriers are z. As mineral earths and similar inorganic Raw materials. The preparation of the invention Preparations are set forth in the following examples:

Example 1

This example shows the production of a Wettable powdered preparation according to the invention.

Composition of the mixture:  

5% by mass of lignosulfate sodium (eg Vanisporse CS, Polyfon O) (dispersing agent),
2% by weight of lauryl sulfate sodium (Tensiofix BCZ) or alkyl naphthalenesulfonic acid sodium salt (eg Nokál C) (wetting agent),
5-10% by weight synthetic silica (Wessalon, Zoosil, Noosyl, etc.) (grinding aids),
30% by mass of eglinazine ethyl and
20% by mass of bentazone (active substances),
33-38% by weight diatomaceous earth or kaolin (carrier).

The effectiveness of the preparations according to the invention show the following biological examples:

example 2

Those used in the biological examples Crops and weed plants shows Table III.

crops: Hordeum vulgaris oats Secale cereal barley Triticum aestivum wheat Alopecurus pratensis Meadow Foxtail Alopecurus myosuroides Blackgrass Apora spica-venti wind grass Avena spp. Wild oats Chenopodium spp. Gänsefußarten Chenopodium album White goosefoot Chrysanthemum leucans gold flower Chrysanthemum segetum Meadow flower growth Cirsium arvense field thistle Convulvulus arvensis bindweed Galium spp. Labkrautarten Galium aparine cleavers Lapsone comunis Saltwort Lolium spp. Lolcharten Matricaria involva chamomile Poa spp. Rispengrasarten Poa trivialis cattle grass Sinapis arvensis Wild rape Stellaria media chickweed Veronica spp. Veronika species

The trial results will be with help the EEA scale in Table IV.

Table IV

The in a hothouse in plastic plates (10 cm) grown crops Triticum aestivum, Hordeum vulgare, Secale cereale and the weed plants  Alopecurus myosuroides, Poa trivialis, Apera spica-venti, Vane fatus, Galium aparine and Matricaria inodom were at developmental levels of 5-20 cm with the following herbicides and their mixtures in the ratio 1: 1 in shape of dispersion or emulsion preparations treated:

Series 1:
With N- (4-chloro-6-ethylamino-1,3,5-triazine-2-yl) glycine ethyl ester, 0.5-1.0-2.0 kg / hectare.
Series 2:
With 3-isopropyl- (1,4) -benzo-2,1,3-thiadiazin-4-one-2,2-dioxide, 0.5-1.0-2.0 kg / hectare.
Series 1 + 2:
Application of a mixture of the active ingredients 1: 1 in amounts of 0.5-1.0-2.0 kg / hectare.

Table V shows the results of the three above Test series.  

Table V

Table V shows that the mixture of Bentazone with eglinazine-ethyl in all used Dosages the weed killing effect of each Components surpasses.  

example 3

On outdoor plots of 20 m² will be 14-18 cm high crops (Hordeum vulgare, Triticum aestivum) and weed plants (Apera spica-venti, Alopecurus myosuroides, Poa trivialis, Avena fatua, Galium aparine, Matricaria chamomilla) with the herbicidal active ingredients and whose mixture is treated in the form of dispersions:

Series 1:
N- (4-chloro-6-ethylamino-1,3,5-triazine-2-yl) glycine ethyl ester, 0.75 kg / ha,
Series 2:
3-Isopropyl- (1,4) -benzo-2,1,3-thiadiazin-4-one-2,2-dioxide, 1.5 and 2.25 kg / ha,
Series 1 + 2:
Mixture 1: 1 of the above active ingredients in the dosage of 2.0 kg / ha.

Table VI

As a result of the continuous use of the hormone-containing Herbicides have resistant varieties of the dicotyledons Matricaria spp. and Galium Aparine trained, and in the crop are too such plants emerged, which so far for Weidenflora belonged, z. B. Alopecurus myosuroides. The additional extermination of these grass species was  necessary. Bentazon is not for that purpose suitable because it affects the mentioned weeds only has a weak effect and because one Contact herbicide against risen weeds only in the appropriate development phase is effective.

The application of the invention Preparations for weedkilling allow the Application of lesser amounts of eglinazine and Bentazon as usual and the eradication such weeds as Matricaria spp., Galium aparine, Alopecurus myosuroides, etc. The invention Preparations are effective killers strong for those in the crop spreading varieties, such as Apera spica-venti and Poa trivialis.

By applying the inventive Preparations achievable advantage are:

• 1. The spectrum of action of the mixture includes several hard-to-destroy weed species.
• 2. The duration of action of the postemergent Combination has risen because of that The preparation which had reached the bottom after spraying rising weeds due to its root-herbicide Effect destroyed.  
• 3. As a result of the interaction between The components can be in weed killing the amount of individual components below reduce the previously effective amount.

Claims (2)

1. Postemergentes herbicide preparation, which consists of two biologically active substances and excipients, optionally from surface-active substances, characterized in that it as active ingredients in 0.1-95% by mass and in a quantitative ratio of (1: 10) - (10: 1 ) a mixture of N- (4-chloro-6-ethylamino-1,3,5-triazin-2-il) glycine ethyl ester and 3-isopropyl (1H) benzo-2,1,3-thiadiazine ( 4) -one-2,2-dioxide. 2. Method of destroying unwanted Weed plants in cereal crops, characterized in that the cereal seed postemergent with a solid or liquid Preparation containing the mixture of active ingredients N- (4-chloro-6-ethylamino-1,3,5-triazin-2-il) glycine ethyl ester and 3-isopropyl- (1H) -benzo Contains 2,1,3-thiadiazine (4) -one-2,2-dioxide, calculated on the total amount of active substances, treated in quantities of 1-8 kg / ha.