JP2015189701A - Method for controlling perennial gramineae grass weeds in the lawn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for controlling all of: Paspalum genus, such as Sima Paspalum; Imperata genus, such as Imperata; Andropogon genus, such as Andropogon Virginicus; and Anthoxanthum odoratum genus, such as Anthoxanthum odoratum, which are important as perennial Gramineae grass weeds, without causing phytotoxicity to the lawn.SOLUTION: Provided is a method for controlling perennial Gramineae grass weeds in the lawn in which: Asulam and 1-(4,6-dimethoxypyrimidin-2-yl)-3-[2-(dimethylcarbamoyl)-5-formamide phenylsulfonyl]urea (common name: Foramsulfuron) are combined and applied; and furthermore a fertilizer is combined and applied.

Description

  The present invention relates to a method for controlling weeds, and more particularly to a method for controlling perennial grasses in weeds.

  In the maintenance management of lawns such as golf courses, sports facilities, park green areas, grounds, road green zones, and green zones of factory zones, the invasion damage of perennial grasses that are difficult to control is a problem.

  Conventionally, combinations of herbicidal components having different mechanisms of action have been proposed for controlling perennial grass weeds.

  Patent Document 1 discloses N′-methoxycarbonylsulfanilamide sodium (generic name: ashram) and 1- (4,6-dimethoxypyrimidin-2-yl) -3- (3-trifluoromethyl-2-pyridylsulfonyl). A method for controlling perennial gramineous weeds by applying urea (generic name: Frazasulfuron) in combination has been proposed. In the examples, herbicidal effects on chigaya and spiderweed are described.

  Patent Document 2 discloses ashram and 1- (4,6-dimethoxypyrimidin-2-yl) -3-[(3- (2,2,2-trifluoroethoxy) -2-pyridylsulfonyl] urea (generic name). : Trifloxysulfuron) or a salt thereof is applied in combination, and a method for controlling perennial grass weeds has been proposed. In the specification, the control of chigaya which was difficult to control with the herbicide of Patent Document 1 It is described that control became possible.

  However, the methods of Patent Documents 1 and 2 are insufficient for controlling many difficult-to-control perennial grass weeds. As a perennial grass weed that is particularly important in lawn maintenance, it is possible to control all species of the genus Sparrow, such as the mosquito, for example, the genus Tigaya, for example Tigaya, the genus Genus, for example Merikenkarkaya, and the genus Hargaya, for example Hurghaya. A method that could be done was eagerly desired.

  On the other hand, a method for improving herbicidal activity is also eagerly desired. Patent Documents 3 and 4 describe methods for improving herbicidal activity by applying nitrogen fertilizer simultaneously with herbicides, but there is no description of the method of the present invention described later.

JP 2001-39806 A JP 2008-31061 A JP-A-7-010714 Japanese Patent Laid-Open No. 11-269015

  The object of the present invention is important as a perennial grass family weed without causing phytotoxicity on the lawn, for example, the genus Sparrow, such as Shimuzumenohie, the genus Chigaya, such as Chigaya, the genus Uxus, such as Merikenkarkaya, and the Hurghaya, etc. The object is to provide a method for controlling all of the genus Harghaya.

  As a result of intensive studies to solve the above problems, the present inventors have found that ashram and 1- (4,6-dimethoxypyrimidin-2-yl) -3- [2- (dimethylcarbamoyl) -5--5 as an active ingredient. Formamidephenylsulfonyl] urea (generic name: horamsulfuron) is applied in combination, and is important as a perennial grass weed. It has been found that all genuses of the genus and genus Hurghaya, for example Hurghaya, can be controlled very effectively at a faster rate of slaughter. For example, it has been found that 90% or more of the herbicidal ability is reached 15 days after the treatment or 20 days after the treatment, and thereafter the herbicidal effect is stably maintained, for example, for 30 days or 60 days.

  Moreover, it discovered that a herbicidal effect improved by combining nitrogen fertilizer with the said combination further.

  Therefore, the present invention is as follows.

(1) N'-methoxycarbonylsulfanilamide sodium (generic name: ashram) and 1- (4,6-dimethoxypyrimidin-2-yl) -3- [2- (dimethylcarbamoyl) -5-formamidophenyl as active ingredients [Sulfonyl] urea (generic name: horamsulfuron) is used in combination to control perennial grasses in the lawn.

(2) The method according to the above (1), wherein the perennial grass family weeds are, for example, genus genus genus such as genus genus, genus genus such as genus chigae, genus genus such as merikenkarkaya, and genus genus genus such as hulgaya.

(3) A method for controlling perennial weeds in lawn by applying a combination of ashram and horamsulfuron in combination with nitrogen fertilizer as a further active ingredient.

(4) The method according to the above (3), wherein the perennial grass family weeds are, for example, genus genus genus such as genus genus, genus genus such as genus chigae, genus genus such as merikenkarkaya and genus genus genus such as hulgaya.

  The ashram used in the method of the present invention is a known compound, and is an active herbicide ingredient that exhibits an effect on upland annual weeds in Japanese turf.

  Foramsulfuron used in the method of the present invention is a known compound, and is a herbicide active ingredient that exhibits an effect on annual and perennial broadleaf weeds in Japanese turf.

  Both active ingredients are usually solutions, emulsions, wettable powders, aqueous suspensions, oily suspensions, soluble powders, soluble granules, suspoemulsion formulations and microencapsulated in polymeric materials. The formulation can be

  These formulations are prepared in a known manner, for example using surfactants (ie emulsifiers and / or dispersants and / or foam formers), optionally using the active ingredients as extenders (ie liquid solvents and / or Or a solid support). Such formulations are prepared with appropriate equipment or prepared before or during application.

  Suitable bulking agents are, for example, water and polar and non-polar organic chemical liquids such as those selected from the following types: aromatic and non-aromatic hydrocarbons (eg paraffins) Alkylbenzenes, alkylnaphthalenes, chlorobenzenes), alcohols and polyols (where appropriate, they may be substituted, etherified and / or esterified). ), Ketones (eg, acetone, cyclohexanone), esters (including fats and oils) and (poly) ethers, unsubstituted and substituted amines, amides , Lactams (eg N-alkylpyrrolidones) and lactones, sulfones and sulfoxides (eg dimethylsulfoxy) ).

  When the extender used is water, for example, an organic solvent can be used as an auxiliary solvent. In essence, suitable liquid solvents are aromatic compounds such as xylene, toluene or alkylnaphthalenes, chlorinated aromatic compounds and chlorinated aliphatic hydrocarbons such as chlorobenzenes, chloroethylenes or methylene chloride, aliphatic Hydrocarbons such as cyclohexane or paraffins such as petroleum fractions, mineral and vegetable oils, alcohols such as butanol or glycols and their ethers and esters, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone or cyclohexanone, Strong polar solvents such as dimethyl sulfoxide.

  According to the present invention, the carrier is a natural or synthetic organic or inorganic substance that can be solid or liquid, mixed or combined with the active ingredient to improve applicability. Such solid or liquid carriers are generally inert and should be suitable for use in the lawn.

  Suitable solid carriers are, for example, ammonium salts and ground natural minerals such as kaolin, clay, talc, chalk, quartz, attapulgite, montmorillonite or diatomaceous earth, and ground synthetic materials such as high Suitable emulsifiers and / or foam formers are, for example, nonionic and anionic emulsifiers such as polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers such as, for example, Alkylaryl polyglycol ethers, alkyl sulfonates, alkyl sulfates, aryl sulfonates, and also protein hydrolysates, etc .; suitable dispersants are non-ionic and / or ionic substances, For example, alcohol-POE and / or Or -POP ethers, acids and / or POP-POE esters, alkylaryl and / or POP-POE ethers, fats and / or POP-POE adducts, POE- and / or POP-polyol derivatives, POE- and Selected from: POP-sorbitan or -sugar adducts, alkyl sulfates or aryl sulfates, alkyl sulfonates or aryl sulfonates and alkyl phosphates or aryl phosphates or their corresponding PO-ether adducts It has been. In addition, suitable oligomers or polymers, such as those derived from vinyl monomers, those derived from acrylic acid, EO and / or PO alone or in combination with, for example, (poly) alcohols or (poly) amines Derived from. Furthermore, lignin and its sulfonic acid derivatives, unmodified cellulose and modified cellulose, aromatic and / or aliphatic sulfonic acids and their adducts with formaldehyde can also be used.

  In the above formulations, tackifiers such as carboxymethylcellulose and natural and synthetic polymers in the form of powders or granules or latex such as gum arabic, polyvinyl alcohol and polyvinyl acetate, and natural phospholipids such as Sephaline and lecithin, synthetic phospholipids, and the like can be used.

  Colorants such as inorganic pigments such as iron oxide, titanium oxide and Prussian blue, and organic dyes such as alizarin dyes, azo dyes and metal phthalocyanine dyes, and micronutrients such as iron salts, manganese salts, boron Salts, copper salts, cobalt salts, molybdenum salts, zinc salts, and the like can be used.

  Other possible additives are fragrances, optionally modified mineral or vegetable oils, waxes, and nutrients (including micronutrients) such as iron salts, manganese salts, boron salts, copper salts Cobalt salts, molybdenum salts, zinc salts and the like.

  Stabilizers (eg, low temperature stabilizers), preservatives, antioxidants, light stabilizers, or other agents that improve chemical and / or physical stability can also be present.

  Commercial products containing ashram or horamsulfuron can be used in the method of the present invention.

  As a commercially available product containing ashram as an active ingredient, there is a Bayer Argylan (registered trademark) solution (Bayer Crop Science, active ingredient 37%, specific gravity 1.18 (20 ° C.)). In the method of the present invention, the product can be applied at 4000 to 6000 ml / ha. A commercially available product containing holamsulfuron as an active ingredient is Tribute (registered trademark) OD (Bayer Crop Science, active ingredient 2.2%, specific gravity 0.95 (25 ° C.)). In the present invention, the product can be applied at 1500 ml to 3000 ml / ha.

  The nitrogen fertilizer as a further active ingredient in the method of the present invention is not particularly limited as long as it is a substance containing nitrogen element. For example, nitrate, lime nitrogen, ammonium sulfate, ammonium nitrate, ammonium sulfate, urea, phosphorus ammonium, IB and ureaform Among them, urea is preferable. The application rate of urea is preferably 10 kg to 30 kg / ha, particularly preferably 15 kg to 25 kg / ha.

  In the method of the present invention, the combination of each active ingredient is diluted with water to a predetermined concentration, and each active ingredient is separately separated, for example, within 3 days, within 24 hours, or within 3 hours. Sprinkling, mixing each active ingredient formulated into water and diluting with water etc. to the prescribed concentration and spraying, or diluting each active ingredient mixture with water etc. to the prescribed concentration Means spraying. It is desirable to mix and formulate each active ingredient and dilute and spray with water to a predetermined concentration, or dilute and spray with a mixture of each active ingredient to a predetermined concentration and spray .

  The application time of the present invention varies depending on the generation time, generation status, temperature, etc. of the weeds, but it is desirable to apply it before the weed growing season, before heading or after heading. The excellent herbicidal activity of the active ingredient combination according to the method of the present invention is apparent from the following examples. Although the individual active ingredients are inadequate with respect to herbicidal activity, the combination exhibits an activity that is more than just the sum of the activities.

  If the herbicidal activity of the active ingredient combination exceeds the sum of the active ingredient activities when applied individually, there is always a synergistic effect of the active ingredients.

The expected activity for a given combination of two active ingredients can be calculated as follows (Colby, SR, “Calculating Synthetic Responses and Herbicide Combinations”, Weeds 1967, 15, 20-22):
X is the efficacy when a product containing active ingredient A is applied at an application rate of m (ml) (or g / ha);
Y is the efficacy when a product containing active ingredient B is applied at an application rate of n (ml) (or g / ha);
Z is the efficacy when a product containing active ingredient C is used at an application rate of r (ml) (or g / ha);
E ₁ is an active ingredient A and an active ingredient B (or an active ingredient A and an active ingredient C, or an active ingredient B and an active ingredient C), respectively, m and n (or m and r, or n and r) Efficacy when applied at ml (or g / ha) application rate;
If

And for a combination of three active ingredients:

It is.

  A potency of 0 means a potency corresponding to that of the control, and a potency of 100 means that the weeds have completely died.

  If the actual herbicidal activity exceeds the calculated value, the activity of the combination exceeds the additive one. That is, a synergistic effect exists. In this case, the actually observed efficacy must be greater than the value calculated from the above formula for the expected efficacy (E).

  A further method to demonstrate synergistic effects is that of Tammes (see “Isoboles, a graphical representation of synthesis in pestices” in Neth. J. Plant Path., 1964, 70, 73-80).

  The present invention is illustrated by the following examples, but the present invention is not limited to these examples.

Example 1 : Herbicidal effect against white mosquitoes Test method: A test was carried out on a fairway of a golf course constructed with Kobayashiba. The test area was set in 3 iterations, with 4 m ² per area. Using a small sprayer, each chemical was sprayed on the stems and leaves in June, before the heading of the barnyard grass (about 20 cm in height), with a spraying water amount of 1000 L / ha. The herbicidal effect (complete withering: 100, no effect: 0) was examined by visual inspection 20 and 37 days after the treatment day. No phytotoxicity was observed with any of the drugs and their combinations.

The table below clearly shows that the observed activity is higher than the calculated activity for the combination of active ingredients (Tribute OD + Argylan solution) according to the method of the present invention, that is, there is a synergistic effect. In addition, compared with Shivagen DF + argyran solution and monument granule wettable powder + argylan solution, which are combinations described in Patent Documents 1 and 2, the effect onset speed is clearly faster and the effect is very stable. Show.

(Note 1) Measured value means observed activity.

(Note 2) The calculated value means the activity calculated using the Colby equation.

(Note 3) Tribute OD (trade name) (measuring unit of dosage is mL) and Bayer Argylan solution (trade name) (measuring unit of dosage) are manufactured by Bayer Crop Science Co., Ltd. (Product name) (Measurement unit of drug amount is g) manufactured by Syngenta Japan Co., Ltd., and Shivagen DF (Product name) (Measurement unit of drug amount is g) was manufactured by Ishihara Bioscience Co., Ltd. The same product was used in Examples 2 and 3.

Example 2 Herbicidal Effect on Chigaya Test Method: A test was conducted on a rough golf course constructed with Nosyba. The test area was set in 3 iterations, with 1 m ² per area. Using a small sprayer, each drug was sprayed with foliage in June at a sprinkling water volume of 1000 L / ha, in the growing season (plant height of about 30 cm) after heading of Tigaya. 28 days after the treatment day, we investigated the herbicidal effect (complete withering: 100, no effect: 0) and also measured the ground weight per section, and weeded in the non-treatment ratio (%) The effect was judged.

The table below clearly shows that the observed activity is higher than the calculated activity for the combination of active ingredients (Tribute OD + Argylan solution) according to the method of the present invention, that is, there is a synergistic effect. Moreover, even if it compares with the monument granule wettable powder + argyran liquid agent which is the combination as described in patent document 2, it has shown that an effect is very high. Moreover, it is shown that the above-ground living weight, which is one index indicating the herbicidal effect, is extremely low as compared with the untreated or single agent, and has a stable herbicidal effect.

Example 3: Herbicidal effect on Merikenkarkaya Test method: A test was carried out in a field of Noshiba. The test area was set in 3 iterations, with 1 m ² per area. Using a small sprayer, each chemical was sprayed on stems and leaves in September during the growing season of Merikenkarkaya (plant height of about 30 cm) with a spraying water amount of 1000 L / ha. 33 days after the treatment day, the herbicidal effect (complete withering: 100, no effect: 0) was examined by visual inspection.

The table below clearly shows that the observed activity is higher than the calculated activity for the combination of active ingredients (Tribute OD + Argylan solution) according to the method of the present invention, that is, there is a synergistic effect. Moreover, expression of a higher herbicidal effect is recognized by adding nitrogen as a fertilizer component.

Claims (4)

  N'-methoxycarbonylsulfanilamide sodium (generic name: ashram) and 1- (4,6-dimethoxypyrimidin-2-yl) -3- [2- (dimethylcarbamoyl) -5-formamidophenylsulfonyl] urea as active ingredients A method of controlling perennial grasses weeds in the lawn by applying in combination (generic name: horamsulfuron).   The method according to claim 1, wherein the perennial gramineous weeds are the genus Sparrowgrass, the genus Chigaya, the genus Euphorbia and the genus Harghaya.   A method of controlling perennial weeds in the lawn by applying a combination of ashram and horamsulfuron with nitrogen fertilizer as an additional active ingredient.   The method according to claim 3, wherein the perennial gramineous weeds are the genus Sparrowgrass, the genus Chigaya, the genus Oxalis and the genus Harghaya.