JPS61210001A - Liquid agricultural drug composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD AND BACKGROUND OF THE INVENTION This invention relates to liquid pesticide compositions.

Agrochemical compositions can be in the form of liquids, dusts, powders, rolls, coatings, solids, etc. In compositions containing certain types of active ingredients.

The dosage form will be determined taking into account the user's requirements (which often relate primarily to the method of application) and the physical and chemical properties of the active ingredient.

In particular, liquid compositions are easier to handle and often safer than dusts or powders. There are various types of liquid compositions, examples of which include solutions, emulsions, emulsifiable concentrates, suspensions, etc. Furthermore, other types of liquid compositions can also be used. The carrier or diluent used in these liquid compositions determines the dosage form (eg, solution or emulsion) of the composition. However, in the case of liquid agrochemical compositions that are applied by a spray operation, it is preferred to form the composition by dissolving the agrochemical in a liquid carrier. Furthermore, it is important that the liquid composition in this case can be mixed with other pesticides or pesticide compositions without any adverse effects. An ideal liquid carrier has good storage stability, can be mixed with other products, has good stability during application, and has properties that prevent the agrochemical components in the liquid from crystallizing or becoming dull. A liquid carrier is highly preferred (the above-mentioned crystallization and gluing may change the concentration of the pesticide component in the liquid and may cause clogging of the spray device).

The present invention generally relates to liquid compositions containing pesticides, examples of which include organophosphates, organochlorines, formamidines, synthetic pyrethroids, organotins,
The composition of the present invention may include car-gmate-based pesticides, and the composition of the present invention may include methomyl [i.e., N-[(methylcarbamoyl)oxycothioacetimidic acid
d) carbamate pesticides such as methyl ester] and monocrotophos [i.e. diethyl IE)-/-methyl-2(methylcarbamoyl)vinyl phosphate].
Since it is an organic phosphate pesticide, it is especially suitable for K and M.

Currently, carbamate insecticides are commercially available in the form of compositions, which include, for example, the active ingredient/left-3 Tati W/V, methanol or other alcohol bo-gs Ti' W/V, and water. /! This standard composition is applied according to high volume, medium volume, or low volume application methods, or after mixing with one or more other pesticides. These pesticides can be applied as aerial sprays from airplanes over large areas of farmland.

In recent years, aerial application has increased and is often carried out using specific equipment according to microvolume application methods. Therefore, in this case, a relatively small amount of a highly concentrated pesticide composition is used (previously, a large amount of a low concentration pesticide composition was used). The particular device described above has a high speed rotating mesh drum through which a predetermined amount (accurately measured amount) of a mist consisting of spray droplets of the same size can be sprayed. .

However, standard compositions containing carbamate insecticides such as methomyl, which contain methanol or methanol and water, pose problems when sprayed using very small volume spray equipment. It is.

That is, under certain conditions, the pesticide crystallizes in the device and the pesticide crystals build up in the rotating mesh drum, blocking the mesh and thus making it impossible to operate the device properly. Therefore, the mesh drum must be cleaned frequently.

Similar problems have been found to occur with K when using other insecticides such as organophosphates.

It is therefore an object of the present invention to provide a new liquid composition in which the problem of crystallization of the pesticide from the liquid carrier when sprayed in very small volumes does not occur or in which this problem is substantially ameliorated. It is.

Another purpose can also be used advantageously in other application methods,
SUMMARY OF THE INVENTION The present invention provides novel liquid compositions that have good storage stability and are also miscible with other pesticide compositions.
or alkyl ether solvent of propylene glycol (
nigericol solvent), at least one alkanol solvent, and at least one polar (dipolar) solvent.
)-neutral solvent and a liquid carrier containing at least one type of agricultural chemical dissolved therein.

This composition preferably comprises pesticides 30-001/l,
Glycol solvent 10-7 left Og/! , Alkanol! ;
0-! ;001/l and dipolar neutral solvent/θ
-7! ;01/l.

Although the various pesticides described above can be used in the present invention, particularly useful pesticides are carbamate insecticides having a structure related to the alkaloid physostigmine, such as carbaryl (/-naphthyl-N- methyl carbamate).

Cardefuran (2,3-dihydroco, 2-dimethyl-
7-Benzofuranyl-N-methylcarbamate).

Propoxar (2-isopropylphenyl-N-methylcarbamate), Dioxacarb [o-(/, 3-dioxolane-Jl-ruphenyl-N-methylcarpamate) L-pendiocarb (J, 2-dimethyl-/, 3-pene Zodiokin-Roogooi pv-N7 mel carpame)
), Fludicalp [co-methyl-co-(methylthio)-
propionaldehyde-〇-methylcarbamoyl-oxime], methomyl[S-methyl-N-(methylcarbamoyloxylthio-acetamidate], oxamyl[S-methyl-7-dimethylcarpamoyl-N-[(methyl- carbamoyl)oxy]-thioformamidate], virimicarb (2-dimethylamine-left, 6-dimethyl-derbilimidinyl-N,N-trimethylcarbamate), diethylene [λ-(N,N-dimethylcarbamoyl)- 3-methylpyrazol-5-yl-N,N-dimethylcarbamate), mexacarbate (cu-dimethylamino-3,!r-xylyl-N-methylcarbamate).

Promecarb [3-methyl-3-(/-methylethyl)
phenol-N-methylcarbamate], methiocarb (lI-methylthio-3,3-xylyl-N-methylcarbamate), formanate (3-dimethylaminoethylene-iminophenyl-N-methylcarbamate-hydrochloride), thiocarb [dimethyl- N, N'
−[Thiobis-(methylimino)-cal? Nyloxy]-bis-(ethanimidothioate)].

A preferred carbamate insecticide is methomyl having the linear formula %.Other examples of carbamate insecticides that can be advantageously used in the present invention include carbaryl, thiodicarb,! Examples include lomecarp, cardefuran, and pendiocarb.

Furthermore, the present invention can be very advantageously utilized in the formulation of organic phosphate insecticides such as monocrotophos.

The liquid carrier preferably contains a large amount of the aforementioned glycol solvent.

The alkyl ethers of diethylene or propylene glycol as mentioned above may be the (fM) monoethers of diethylene glycol, dipropylene glycol, ethylene glycol or diethylene glycol; examples of lower alkyl groups in this case include Examples include methyl group, ethyl group, N-propyl group, and N-butyl group.

The monomethyl ether of propylene glycol is known as methylgloxytol, and the monomethyl ether of diglopylene glycol is known as methyldizoloxytol.

Methylgloxitol and methyldideroxytol are preferred solvents of this type, with methylgloxitol being the most preferred and this being the % preferred when the pesticide is methomyl.

The liquid carrier also contains an alkanol solvent. Preferred alkanol solvents are lower alkanols such as methanol and ethanol. Methanol is preferred when the pesticide is methomyl. However, any suitable alkanol solvent can be selected, generally taking into account the other components in the carrier. In this specification, term 1
"Lower" preferably means 6 or less carbon atoms, especially 9 or less carbon atoms.

The carrier also contains a polar-neutral solvent, since this solvent is a solvent with great solvent power. That is, this solvent is useful for preventing crystallization (precipitation) of the agricultural chemical at low temperatures and when applying the agricultural chemical composition. A preferred polar-neutral solvent is N-methyl-copyrrolidinone (NMP), which is particularly useful when using methomyl as the pesticide. Examples of other suitable polar-neutral solvents include dimethylformamide and dimethylacetamide.

The agrochemical composition may also contain one or more ketone solvents. The amount of ketone solvent used is preferably 20
Examples of ketone solvents below 01711, for example 001/l, include acetone, methyl ethyl ketone, mesityl oxide, cyclohexanone, methyl-n-butyl ketone, methyl isobutyl ketone, diacetone alcohol, methyl amyl ketone, methyl isoamyl ketone. ,
Examples include diimbutyl ketone and isophorone ◇ Selection of ketone solvent will be made taking into consideration the dissolving power of the insecticide, volatility, miscibility with other ingredients, impact on treated crops, price, etc. . In the case of compositions containing methomyl, cyclohexanone or diacetone alcohol is preferred, with diacetone alcohol being particularly preferred. It is believed that the ketone solvent helps prevent crystallization of the pesticide from the carrier mixture.

The compositions of the invention may also contain water. The amount of water used is preferably less than Below 01/Il, just in case, left -2 left 01
/l. Water promotes the mixing of various ingredients.

and can be used to improve the storage stability of the composition. For application methods other than minimal volume, most pesticide compositions are diluted with water by the end user or applicator.

It may be preferable to incorporate dispersing or wetting agents into the composition. The amount of dispersant or wetting agent used is preferably 10011/l or less, for example! -1009/l, which allows the crops to be treated (for example, crops to be sprayed) to be reliably and appropriately moistened.One dispersant currently commonly used in the field of agrochemical compositions is:
Examples of dispersants that can be used in the present invention include sulfonates, ethoxylates, and ethylene oxide condensates, and specific examples thereof include 6)-8C/j-.

Examples include "Terikku-N30", "Terikku-N'lO" and "6nonidetsto 9/O"("'Kemat"
, ``Teritsuku'' and ``Nonidet'' are registered trademarks)
.

The composition may also contain mixtures of two or more pesticides, such as endosulfan, helotion, curacuron, acidrin, which are well-known pesticides. It is also possible to use a mixture of one or more of them.

To more specifically illustrate the composition of the present invention.

Next, examples will be shown.

example/ A methomyl-containing composition was prepared according to the following recipe.

Ingredients Amount (*w/v) Methomyl (agrochemical grade) 23 NMP
/ lI methylproxitol
3comethanol/water
9 Diacetone Alcohol Example: A methomil-containing composition was prepared according to the following recipe. Methomil (agricultural grade; purity q, !r%)
2.3NMP
10 Methylproxitol 413 Methanol 7.2 Water
10 Example 3 Composition Stability Example/The storage stability of the composition of Example 3 was tested. This storage stability test was conducted according to the following method. Seed the composition and hold the composition sample at the temperature listed in Table 1 for a specified number of days.

The results were observed. The storage stability of the compositions of Example/and Example Co is excellent and they appear to be stable for more than two years under normal storage conditions.

(Left below) Miscibility of the composition in Table 1 with other pesticides/And when the composition in Example G is mixed with another pesticide, namely endosulfan, helotion, caccurone or acidrin, the miscibility is generally 90. Found to be good @
In each case, by appropriate selection of the mixing ratio of the pesticides, stable mixtures (i.e. compositions) were obtained.

The composition of the present invention has good miscibility with other pesticides.

Example 3 Crop Spraying Test A test was conducted in which a field of sunflowers was sprayed. This sunflower was at a stage where the qos had bloomed and had grown to such a height that the plant's top was bent.
In addition, the pest insect Heliothis spp.
The methomyl-containing composition of 〇 cases/ where larvae of ) were scattered was sprayed from an airplane onto sunflowers at various spray amounts.
Spraying is carried out using a rotor IJ - atomizer, and the size of the droplets of the spray liquid is approximately 90 microns when the spray volume is /, , t J (per hectare) and the spray volume is approximately 90 microns. In the case of No. 201, the droplet size of the spray liquid was about 720 microns. As a comparative sample, a known methomyl-containing composition was also sprayed.

This comparative composition sample was a commercially available product, "Nudlin for Insecticides" (a product manufactured by Shell; "Nudlin" is a registered trademark).

In this test, 70 per sunflower area/block
The number of moth larvae living on the tops of 70 randomly selected sunflowers in each of the two subareas was counted.

This sunflower cultivation area was divided into Ω blocks, and each block was treated with pesticides. The number of larvae was counted immediately before treatment and after λ8 of treatment.

The results of this test are shown in Table ①.

As is clear from the results of this test, examples/
The composition has greater insecticidal power than the commercially available compositions described above. That is, one example of a methomyl-containing composition was sprayed /, 31 or 01/hL, and the application amount as methomyl was 2.
．． 23LarQ//ha, when the above-mentioned known methomyl-containing composition "Nudrin insecticide composition" is sprayed with 201/b* (the application amount as methomyl is the same as that of the composition in the above example/). (same as the case), the insecticidal effect is statistically much higher than that of a dog.
The results of this test also confirmed that the composition of Example 1 is suitable for both minimal and small volume application methods.

Upon inspection of the rotary atomizer used for atomizing the methomyl-containing composition of the present invention, we found that the device was clean, clean, and working smoothly even after the above treatments. It was confirmed that it is possible.

(Left below) Table ■Example/2λ,! i' /,,t 10°3A left Cg
7)” (Ao) Example / , 2゜23 20”
/, 2.2 /,, tCg B) (/, 0) Example /, 337. ! ; /,left
//, 2 Otsu 2Cg9) (/, 5) Insecticide Nudo 1 Noah (publicly known) 33Z left 20” /
/, 3 2.7<73) No treatment //, 2
10.7- When applying the medium composition at an application rate of 201/ba, a wetting agent [commercial product "Shell Monsoon #"]
Registered trademark)] 2! ; ml/1001 was added.

The number inside the umbrella is the larval reduction rate, or insect killing rate (chi;
(untreated sample standard).

Example 6 A monocrotophos-containing composition was prepared according to the following recipe.
/lI methylproxitol 3/methanol/da water
9 Diacetone Alcohol Example A composition containing monocrotophos was prepared according to the following recipe.

(Left below) Ingredients Blend amount (%W/W) NMP
10 Methyl Gloxitol 2 Comethanol 10 Water
Otsu diacetone alcohol 5 examples g Crop spray test pest (Epiphyas postvittana)
1 in each of several sub-areas of Kiichipu cultivation area affected by
Composition of Example 7 and commercially available monocrotophos-containing compositions [
“Acidinda 00” (registered trademark)] was sprayed on each sample. The spraying device used was a Kuno 4-Pegler Funatsubap sprayer with one nozzle.

The results of these treatments were investigated. Both of these two rice plants were treated with monocrotophos as shown in Table 1.
Postvlttana) showed a very good effect on Table ① Example 7. 200
'72. G7 Otsu, '19/, Da0 Acidrintt
oo" (known) KO0036.7 g and 3 wo Otsug untreated control sample -0, g iO Otsu, Riko's results also show that the composition of the present invention
``Yoshi also shows that the effect is even greater.

The compositions of Example B and Example 7 can be advantageously used in the same manner as the previously described methomyl-containing compositions according to the present invention.

Claims (10)

[Claims] (1) in a liquid carrier comprising at least one mono- or diethylene- or propylene glycol alkyl ether solvent, at least one alkanol solvent, and at least one polar-neutral solvent; A pesticide composition formed by dissolving one type of pesticide. (2) Pesticide 50-500g/l, glycol solvent 10-
750 g/l, alkanol solvent 5-500 g/l, and polar-neutral solvent 10-750 g/l. (3) The agrochemical composition according to claim 1 or 2, wherein the agrochemical is a carbamate-based or organic phosphate-based insecticide. (4) The pesticide is selected from the group consisting of methomyl, carbaryl, carbofuran, propoxar, dioxacarb, bendiocarb, aldicarb, oxamyl, pirimicarb, dimethylane, mexacarbate, promecarb, methiocarb, formanate, thiodicarb, and monocrotophos. The agricultural chemical composition according to claim 3. (5) The agrochemical composition according to claim 4, wherein the agrochemical is methomyl or monocrotophos. (6) The agricultural chemical composition according to any one of claims 1 to 5, wherein the glycol solvent is methylproxitol or methyldiproxitol. (7) The agrochemical composition according to any one of claims 1 to 6, wherein the alkanol is methanol or ethanol. (8) The agricultural chemical composition according to any one of claims 1 to 7, wherein the polar-neutral solvent is N-methyl-2-pyrrolidinone, dimethylformamide, or dimethylacetamide. thing. (9) further containing at least one component selected from the group consisting of ketone in an amount of 200 g/l or less, water in an amount of 250 g/l or less, and dispersant in an amount of 100 g/l or less; Featured Claims Items 1 to 8
The agricultural chemical composition according to any one of paragraphs. (10) A method for controlling pests in a place where the pests live, the method comprising applying the agrochemical composition according to any one of claims 1 to 9 to the place where the pests live.