LT3397B - Herbicidal composition and undesirable plants cotrol method - Google Patents

Abstract

The herbicidal composition consists of (a) 2-[4-chlor-2-fluor-5- (pentyloxycarbonyl-methoxy)phenyl]-4, 5, 6, 7-tetrahydro-2H-isoindol-1,3-dione and (b), after one compound, selected from the group, which consists of N-phosphonomethyl)glycine, (2-amino-4-methyl phosphine butyryl) alanylalanine, DL-homoalanine-4-il(methyl)phosphine acid and its saline. Furthermore, this herbicidal composition is used to kill undesirable plants.

Description

The invention relates to a herbicidal composition, namely a herbicidal composition which is a combination of certain active ingredients.

In recent years, several herbicides have been used to control weeds on agricultural and non-agricultural plots. However, there are many weeds that need to be eliminated or combated, and it is desirable to develop good herbicides that are more herbicidally active against a wide variety of weeds, e.g. would have a broader range of weed action.

A large number of different herbicides are used in agricultural fields before they are plowed or before sowing of agricultural crops. In this case, it is desirable to use herbicides which, when applied to the fields, will rapidly become operational, since those fields can be plowed or drilled much quicker after treatment with the herbicide. In addition, such herbicide, when applied, must not be intrinsically phytotoxic to the crop.

Under these conditions, various herbicidal compounds have been intensively studied and it has been found that special herbicidal compounds as active ingredient formulations can be used as herbicidal compositions having particularly good herbicidal activity.

The present invention provides a herbicidal composition comprising as active ingredients a herbicidally effective amount of (a) 2- [4-chloro-2-fluoro-5- (n-pentoxycarbonylmethoxy) phenyl] -4,5,6,7-tetrahydro-2H -isoindol-1,3-dione of the formula below

and (b) at least one compound selected from the group consisting of N- (phosphonomethyl) glycine of the formula:

HO-C ^- CH 2 ~ NH ^- CH 2_p_Qpj

OH and its salts, (2-amino-4-methylphosphinobutyryl) -anyl-5-alanine of the formula:

<r ^H 3

CH.

HCP-CH-CH-CHCONHCHCONHCHCOOH ³ L ² 2,

OH NHand its salts, the acid corresponding to

DL-homoalanin-4-yl (-methyl) phosphine formula:

H.C-P-CH-CH-CHCOOH

I I

OH NH ₂ and its salts.

Accordingly, the present invention also provides a method of combating undesirable plants, which comprises applying the above herbicidal compositions to the area in which the undesirable plants grow.

The herbicidal composition which is the subject of the present invention is characterized by the use of the active ingredients (a) and (b) in the composition. Such use of the composition provides particularly good properties for killing or stopping the growth of a wide variety of weeds on agricultural or non-agricultural plots, and compared to each application of these ingredients results in a much faster herbicidal effect, i.e. synergistically increasing herbicidal action rate. doses, which is cost effective. Furthermore, the herbicidal composition which is the subject of the present invention, after treatment with it, is not significantly phytotoxic to the crop.

The herbicidal composition, which is the subject of the present invention, can kill or regulate the growth of a wide variety of weed species, such as broadleaf weeds such as creeping acid (Polygonum convolvulus), peppery acid (Polygonum lapathifolium), curly sorrel (Rumex crispus), Purple oleracea, Stellaria medi a, Stellaria aquatica, Chenopodium album, Amaranthus retrioflexus, Mustard Sinapis arvensis, Capercaillie (Caps) (Sebania exaltata), Cassia obtusifolia, Torilis japonica, Abutilon theophrasti, Sida spinosa, Viola arvensis, Galium aparine, Ipomea hederacea), ipomea purple (Ipomea purpurea), creeper (Convo lvulus arvensis), red-breasted weevil (Lamium cinodonas weeds, communis), purpureum), weevil (Lamium aplexicaure), black-billed porcupine (Solanum nigrum), alien veronica (Veronica persica), common yarrow (Greater silver thistle), Helianthus annus, Matricaria perforata, Chrysantheum segėtum, Artemisia princeps, Solidago altissima and Spergula arvensis; , Echinochloa crusgalli, Setoria viriolis, Setaria faberi, Digitaria Sauguinalis, Poa annua, Alopecurus myosuoides, Avian oatmeal (Aventa fatua), Sorghum halepens (e), common burbot (Agropyron repens), sand eel (Bromus tectorum), (Cynodon dactylon); cruciferous family such as camelina (Commelina and weed family such as (Cyperus iria) and cicada flowering purple (Cyperus rotundus)

When the herbicidal composition is proposed in the field of agriculture, the main crop crops are essentially free of phytotoxic effects such as soy (Glycine max), corn (Zea mays), cotton (Gossupium hirsutum), wheat (Triticum aestivum), sugar beet (Beetroot). ), barley (Hordeum vulgare) and rice (Oryza sativa) and vegetables such as turnips (Raphanus sativus), onions (Allium cepa) and carrots (Dancus carota gim. sativus).

The active ingredients (a) and (b) are already known in the art, for example 2- [4-chloro-2-fluoro-5- (nLT 3397 B pentyloxycarbonylmethoxy) phenyl] -4,5,6,7-tetrahydro-2Hisoindoyl The -1,3-dione described in U.S. Patent No. 4,677,0046, N- (phosphonomethyl) glycine and its salts (hereinafter referred to as glyphosphate), which are herbicides, are described in CR Worthing et al. The Pesticide Manual), 8th ed., 1987, p. 449-450, (2-Amino-4-methyl-phosphinobutyryl) alanylalanine and its salts (hereinafter referred to as bialafos) are herbicides described in Tetsuo Takamatsu's book, Josoh-zai Kenkyu Sohram (General Survey of Herbicide Research), 1982, p. 611; and DL-homoalanin-4-yl (methyl) phosphinic acid and its salt (hereinafter referred to as glufosinate) are herbicides described in C.R. Worthing et al. The Pesticide Manual, 8th ed., 1987, p. 448.

Examples of pesticidally acceptable salts of N (phosphonomethyl) glycine salts include isopropylamine salts, ammonium salts and trimethylsulfonium salts, while pesticidically acceptable salts of (2-amino-4-methylphosphinobutyryl) alanylalanine salts include sodium salts. Examples of DL-homoalanine-4-yl (methyl) phosphinic acid salts useful in pesticide application include ammonium salts.

The weight ratio of ingredients (a) to (b) generally ranges from 1: 0.25 to 1: 100, more preferably from 1: 0.5 to 1:70, although this ratio may vary within wide limits.

In practice, the herbicidal composition which is the subject of the present invention typically consists of independently mixing each active ingredient with known solid or liquid carriers, surfactants and other additives to form known forms, such as wetting powders, flowable compositions, water dispersible granules, emulsifying soluble granules, concentrates, solutions, water-soluble and water-soluble and subsequently mixing these forms in appropriate proportions, or by mixing all active ingredients simultaneously with solid or liquid carriers, surfactants and other additives to form known forms such as wetting powders , fluid mixtures and water dispersible granules.

These forms have a total concentration of active ingredients (a) and (b) of from 1 to 90% by weight, more preferably from 2 to 80% by weight.

Examples of solid carriers include finely divided kaolin powder or granules of terra alba, pyrophyllite, talc, diatomaceous earth, calcite, hazelnut powder, urea, ammonium sulphate and synthetic hydrated silica. A liquid carrier can include aromatic hydrocarbons such as xylene and methylnaphthalene; alcohols such as isopropanol, ethylene glycol and cellosolve, ketones such as acetone, cyclohexanone and isophorone; vegetable oils, such as soybean oil and cottonseed oil, dimethylsulfoxide, N, N-dimethylformamide, acetonitrile, water and others.

Examples of surfactants used for emulsification, dispersion or dispersion include anionic surfactants such as alkylsulfates, alkylsulfonates, alkylarylsulfonates, dialkylsulfosuccinates (salts or esters) and polyoxyethylene alkylaryl ether phosphates; and surface active nonionic type agents such as polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene and polyoxypropylene block copolymers, sorbitan fatty acid esters, and sorbitan fatty acid polyoxyethylene esters.

Examples of additives include lignin sulfonates, polyvinyl alcohol, acacia gum, carboxymethyl cellulose (KMC) and isopropyl acid phosphate (PRF).

The herbicidal composition which is the subject of the present invention can be used for the treatment of uncultivated fields, hilly land, rice field boundaries, orchards, parks, gazolas, forests and fields. The herbicidal composition, which is the subject of the present invention, is used for emergence of unwanted plant sprouts in the treatment of their leaves.

The dosage of the herbicidal composition, which is the subject of the invention, may vary depending on the proportion of active ingredients being mixed, the type of application, the type of unwanted plants to be destroyed, the prevailing weather conditions, and 1.1. In general, however, the total amount of active ingredients used for processing varies from 100 to 5000 grams, preferably from 200 to 3000 grams per hectare. In general, the herbicidal composition can be applied in any form by dilution with water up to about 100 to 1000 liters per hectare, if necessary with adjuvants such as spreading agents. Examples of such agents include, in addition to the surfactants mentioned above, polyoxyethylene resin acids (esters), ligninsulfonates, abietates, dinaphthylmethanesulfonates, petroleum distillate ointment, seed oil concentrate, and seed oils such as soybean, corn, cotton and sunflower oil.

In addition, the herbicidal composition, the object of the present invention, to increase its herbicidal activity can be used in combination with any other herbicide, and in some cases a synergistic effect can be obtained. In addition, it can also be used in admixture with insecticides, acaricides, nematocides, fungicides, plant growth regulators, fertilizers and the like.

The invention is further illustrated by the following examples of herbicide formulations and test examples which should not be construed as limitations on the applicant.

The following are examples of active ingredient (a) forms with parts by weight.

Form example Part of component (a), 5 parts of polyoxyethylene alkylaryl ether, and 15 parts of synthetic hydrated silica were thoroughly mixed together to form a wetting powder.

Form Example A Partial ingredient (a), part polyoxyethylene alkylaryl ether, part alkylarylsulfonate, and parts cyclohexanone are thoroughly mixed to form an emulsifiable concentrate.

Form sample mixing parts of ingredient (a) with 60 parts of water containing 3% by weight of polyoxyethylene sorbitan monooleate and spraying the mixture until the particles have been reduced to less than 3 microns, then add 20 parts of water to obtain a smooth composition. containing 3% by weight of sodium alginate.

The practical herbicidal composition and herbicidal activity of the herbicidal composition were evaluated in the following test examples using a rating scale from 0 (when not at all) to 10 (completely killed). Glyphosate, biolafos and glufosinate used in these test examples are used in industrial herbicides; so-called Roundup® (containing 41% by weight of glyphosate isopropylamine salt); Herbiace® (an aqueous solution containing 20% w / w bialafos in sodium form) and Basta * (in liquid form containing 18.5% w / w glufosinate in the form of an ammonium salt), respectively.

test sample

Plastic boxes (17x25 cm ² area, 7 cm deep) were filled with top soil and seeded with test plant seeds, Spergula arvensis, and then maintained with test plants in the greenhouse for 20 days. The active ingredient (a) was incorporated into the emulsifiable concentrate as in Example 2 and glyphosate as the active ingredient (b) was taken up in the required amounts and diluted with water. The diluted mixture was evenly sprayed on the leaves of the test plants using a small spray, at a spray rate of 1000 liters per hectare. At that time, the plants were 6-8 cm tall. The test plants were then grown in a greenhouse for 3 days and observed for herbicidal activity. The results are presented in the following table.

Table io

Active ingredient Dose g / ha herbicidal activity

only (a) 10th 3, 0 100 3.9 only (b) 600 1.2 2000 1.9 (a) + (b) 10 + 600 8, 0 100 + 2000 8.9

test sample in a greenhouse. Active moisturizing powder

Plastic containers (17x25 cm; 7 cm deep) were filled with the top layer of soil and seeded with the test plant, Portulaca oleracea. The culture vessels kept ingredient (a) for 27 days in the same manner as in Form 1 sample and diluted glyphosate as active ingredient (b) with water containing 0.2% ¹ (v / v) agent to increase dispersion ( containing 80% of a surfactant such as polyoxyethylene dodecyl ether). The diluted mixture was sprayed uniformly over the entire crop area with a small sprayer at a rate of 1000 liters per hectare. At the time of treatment, the test plants were between 25 and 30 cm tall. Subsequently, the test plants were grown in a greenhouse for 29 days. Herbicidal activity was observed on the third day and on the 29th day after treatment. The results are given in Table 2.

table

Active ingredient Application rate (g / ha) Herbicidal activity 3 DPA * 29DPA * only (a) 50 6.5 9.0 100 8, 0 9.5 200 9.0 10.0 only (b) 600 0.5 7.0 1200 0.5 9.5 (a) + (b) 50 + 600 8, 0 10.0 50 + 1200 9.5 10.0 100 + 600 9.0 10.0 100 + 1200 9.5 10.0 200 + 600 10.0 10.0 200 + 1200 10.0 10.0

* DPA - number of days after processing test sample

Plastic containers (17 x 25 cm ² area, 7 cm deep) were filled with the top soil layer and seeded with red-finger (Digitaria sanguinalis) seeds of the test plant and kept in a greenhouse for 27 days. The active ingredient was (a) added to the powdered glyphosate required for wetting the sample and (b) diluted (w / v) with water containing 0.2% dispersion (containing 80% as in Form 1 as active ingredient). , a surfactant polyoxyethylene dodecyl ether surfactant). The diluted mixture was uniformly sprayed with a small spray over the leaves of the test plants at 1000 liters per hectare.

At the time of treatment, the test plants were 15 to 20 cm tall. The test plants were then continued to grow in the greenhouse for 29 days. Herbicidal activity was tested 3 days and 29 days after application. The results obtained are shown in Table 3.

table

Active ingredient The dose (g / ha) Herbicidal activity 3 DPA 29DPA only (a) 50 2.0 2.5 100 3, 0 4.0 200 3, 5 5, 0 only (b) 800 2.5 9.0 1200 3.0 9.5 (a) + (b) 50 + 800 8, 0 10.0 50 + 1200 8.5 10.0 100 + 800 8.5 10.0 100 + 1200 9.0 10.0 200 + 800 8.5 10.0 200 + 1200 9.0 10.0 Example 4 Test 2 Plastic containers (17x25 cm wide, 7 cm deep) were filled with top soil and seedlings of the test plant were planted in red. (Digitaria sanguinalis) seeds and then maintained in a greenhouse for 27 days. The active ingredient (a) was added to the wetting powder as in the Form 1 sample and added with glial phosinate as active ingredient (b) in the prescribed amounts. The mixture was diluted with water containing 0.2% (v / v) of a spreading agent

(containing 80% surfactant-type polyoxyethylene dodecyl ether). The diluted mixture was evenly sprayed with a small spray over the leaves of the test plants at 1000 liters per hectare. At the time, the test plants were 15 to 20 cm tall.

The test plants were then grown in a greenhouse for 28 days. Herbicidal activity was checked on day 2 after treatment and on day 28. The results obtained are presented in Table 4.

table

Active ingredient The dose (g / ha) Herbicidal activity 2DPA 2 8 DPA only (a) 50 2, 0 2.5 100 2.5 4.5 200 3, 5 5, 0 only (b) 500 4.0 9.5 650 4.5 10.0 800 5, 0 10.0 (a) + (b) 50 + 500 8, 0 10.0 50 + 650 8.5 10.0 50 + 800 9.0 10.0 100 + 500 8.5 10.0 100 + 650 8.5 10.0 100 + 800 9.0 10.0 200 + 500 9.0 10.0 200 + 650 9.0 10.0 200 + 800 9.5 10.0

test sample

Plastic jars (17x25 cm ² area, 7 cm deep) were filled with top soil soil and seeded with the seeds of a test plant, Setaria faberi, and then maintained in a greenhouse for 25 days. and Form 1, and added the determined amount of bialafos as active ingredient (b) and diluted the mixture with water containing 0.2% (v / v) of an agent to improve dispersion (containing

80% surfactant-type polyoxyethylene dodecyl ether). The diluted mixture was evenly sprayed with a small sprayer over the test plants at 1000 liters per hectare. At the time, the test plants were 15 to 20 cm tall. The test plants continued to be grown in the open air for 35 days. Herbicidal activity was tested on day 4 and on day 35 after treatment. The results are shown in Table 5.

table

Active The dose Herbicidal activity ingredient (g / ha) 4 DPA 35DPA only (a) 50 1.0 1.5 200 2.5 3, 0 only (b) 600 5, 5 6, 5 1200 6, 5 10.0 (a) + (b) 50 + 600 7.5 10.0 50 + 1200 8.5 10.0 200 + 600 9.0 10.0 200 + 1200 9.5 10.0

test sample

Plastic containers (17x25 cm ² area, 7 cm deep) were filled with the top soil layer. The active ingredient (a) was added to the wetting powder as in Formula 1, glyphosate, bialafos or glyphosinate as the active ingredient (b) was added in the required amount and the mixture was diluted with water containing 0.2% (v / v) dispersion (containing 80% surfactant-type polyoxyethylene dodecyl ether). The diluted mixture was evenly sprayed with a small amount of soil per 1000 liters per hectare. After 2 days, seeds of test plants, turnips (Rapjanus sativus), onions (Alium cepa) and carrots (Daucus carota family sativus) were evenly mixed into the top layer of soil at a depth of 2 cm. The test plants were then grown in a greenhouse for 33 days and tested for phytotoxicity on each test plant. The test results are shown in Table 6.

table

Active ingredient The dose (g / ha) Phytotoxicity Turnip Onion Carrot (a) + glyphosate 400 + 1200 0 0 0 (a) + glyphosinate 400 + 800 0 0 0 (a) + bialafosa 400 + 1200 0 0 0

Claims (24)

DEFINITION OF INVENTION Claims 1. A herbicidal composition comprising: (a) 2- [4-chloro-2-fluoro-5- (n-pentyloxycarbonylmethoxy) phenyl] -4,5,6,7-tetrahydro-2Hisoindole-1,3- dione; and (b) at least one compound selected from the group consisting of N- (phosphonomethyl) glycine, (2-amino-4-methylphosphinobutyryl) alanylalanine, DL-homoalanine-4yl (methyl) phosphinic acid, and salts thereof. 2. The composition of claim 1, wherein the weight ratio of ingredients (a) to (b) is from 1: 0.25 to 1: 100. 3. The composition of claim 1, wherein the weight ratio of ingredients (a) to (b) is from 1: 0.5 to 1:70. 4. The composition of claim 1, wherein ingredient (b) is selected from N (phosphonomethyl) glycine and salts thereof. 5. The composition of claim 4, wherein the weight ratio of ingredients (a) to (b) is from 1: 0.25 to 1: 100. 6. The composition of claim 4 wherein the weight ratio of ingredients (a) to (b) is from 1: 0.5 to 1:70. 7. The composition of claim 1, wherein ingredient (b) is selected from (2-amyloxy-4-methyl-phosphinobutyryl) alanylalanine and salts thereof. 8. The composition of claim 7, wherein the weight ratio of ingredients (a) to (b) is from 1: 0.25 to 1: 100. 9. The composition of claim 7, wherein the weight ratio of the ingredients is from 1: 0.5 to 1:70. 10. The composition of claim 1, wherein ingredient (b) is selected from DLhomoalanin-4-yl- (methyl) phosphinic acid and its salts. 10th 11. The composition of claim 10 wherein the weight ratio of ingredient (a) to (b) is from 1: 0.25 to 1: 100. Composition according to claim 10, characterized in that the weight ratio of ingredients (a) to (b) is from 1: 0.5 to 1: 100. 13. A method of killing undesired plants, characterized by the use of herbicides The composition according to claim 1, in a herbicidally active amount for an area where undesirable plants are growing. 14. The method of claim 13, wherein the total amount of ingredient (a) and (b) The 25 compositions contain between 100 and 5000 grams per hectare. 15. The method of claim 13, wherein the total amount of ingredients (a) and (b) in the composition is from 200 to 3000 grams per hectare. 16. The method of claim 13, wherein ingredient (b) is selected from N (phosphonomethyl) glycine and salts thereof. 35 17. The method of claim 16, wherein the total amount of ingredients (a) and (b) in the composition is from 100 to 5000 grams per hectare. quantity 18. The method of claim 16, wherein the total amount of ingredients (a) and (b) in the composition is from 200 to 3000 grams per hectare. 19. A process according to claim 13, wherein ingredient (b) is selected from (2-amino-4-methylphosphine-butyryl) alanylanine and its salts. 20. The method of claim 19, wherein the total amount of ingredients (a) and (b) in the composition is from 100 to 5000 grams per hectare. 21. The method of claim 19, wherein the amount of ingredients (a) and (b) in the composition is from 200 to 3000 gamma per hectare. 22. The process of claim 13, wherein ingredient (b) is selected from DLhomoalanin-4-yl (methyl) phosphinic acid and its salts. 23. The method of claim 22, wherein the amount of ingredients (a) and (b) in the composition is from 100 to 5000 grams per hectare. 24. The method of claim 22, wherein the amount of ingredients (a) and (b) in the composition is from 200 to 3000 grams per hectare.