JPS62242603A - Agrochemical dust preparation - Google Patents

Abstract

PURPOSE:An agrochemical dust that contains agrochemical active ingredients, a mineral dust carrier and a hydrocarbon tackifier such as process oil, thus showing reduction in dusting, flying and drifting with increased storage stability and efficacy. CONSTITUTION:The objective agrochemical dust is composed of agrochemical active ingredients, a mineral dust carrier such as clay, silica or calcium carbonate, and a hydrocarbon tackifier. The resultant dust shows inexpensively improved drifting without any adverse effects on adhesion, spreadability and absorption in the plant bodies and the decomposition of the agrochemicals can be prevented. The hydrocarbon tackifier is, e.g., ethylene-alpha-olefin oligomer, or a mixture thereof with isobutylene oligomer, process oil or butadiene oligomer or a mixture thereof with isobutylene oligomer and the amount thereof is 0.2-5.0pts.wt. per 100pts.wt. of the dust.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improved agrochemical powder. More specifically, the present invention relates to an agrochemical powder in which scattering properties are suppressed by blending one to several hydrocarbon-based viscous liquids with an agrochemical active ingredient and a mineral powder carrier.

Conventional technology When spraying pesticide powder, in order to prevent the powder from scattering in areas other than the intended field and having a negative impact on other plants and animals,
There is a strong demand for preventing the drift of pesticide powders, and these methods include making formulations with adjusted particle size into coarse particles such as fine particles and coarse powders, or using liquid paraffin, polybutene, polyisobutyne, etc. A method of adding a wetting substance, etc. is known, for example, Japanese Patent Publication No. 53-23
The latter method has been proposed in Japanese Patent Publication No. 383 and Japanese Patent Publication No. 55-37521.

Problems to be Solved by the Invention However, among these drift prevention methods, the former method in particular requires a special granulation device, and the agricultural chemicals granulated into coarse particles tend to adhere to the surface of crops, etc. It has the disadvantage of being difficult to administer and absorb, and it takes time for it to begin to take effect. During that time, there is a possibility that it will be washed away by wind and rain, which will inevitably reduce its effectiveness further.

In addition, the latter method fully satisfies the requirements of being able to suppress the drift of agricultural chemical active ingredients without losing physical properties such as fluidity, dispersibility, dust dispersion, and adhesion, and is also economically advantageous. It was hard to say how.

It does not require special equipment, is low cost, easy to handle, does not lose the physical properties such as fluidity and adhesion of the powder itself, and has no safety problems such as toxicity. Additives were requested.

An object of the present invention is to provide an agrochemical powder that can suppress the drift of agrochemical active ingredients in an efficient and economically advantageous manner.

Means for Solving the Problems The present invention has been developed based on the results of various studies on additives for preventing the drift of agricultural chemical active ingredients in agricultural chemical powders as described above.
Cooligomers of ethylene and α-olefins or co-oligomers of isobutylene and chlorinated paraffins or both; (ii) process oils or co-oligomers of isobutylene and ethylene and α-olefins; oligomer and one or more chlorinated paraffins added, or (iii) a butadiene oligomer, or an oligomer of isobutylene, a cooligomer of ethylene and α-olefin,
When one or more of chlorinated paraffin and process oil is added to a pesticide active substance and a powdered mineral carrier, the active ingredient can be absorbed without losing fluidity, dispersibility, dust-shedding property, adhesion property, etc. It was discovered that the scattering and floating properties of the pesticide were significantly reduced, while the stability of the agrochemical active ingredient was unexpectedly improved, resulting in an unexpected effect of improving the medicinal efficacy.The present invention was based on this discovery. I was able to complete it.

That is, the present invention relates to (i) a cooligomer of ethylene and α-olefin, or a cooligomer of isobutylene and/or a chlorinated paraffin, (ii) a process oil, or a cooligomer of isobutylene, , a cooligomer of ethylene and α-olefin and one or more chlorinated paraffins, or (iii) a butadiene oligomer, or an oligomer of isobutylene, ethylene and
- Agrochemical powders characterized by containing one or more of olefin cooligomers, chlorinated paraffins, and process oils; The addition reduces the scattering and floating properties of pesticide active ingredients, and furthermore prevents the pesticide active ingredients from decomposing during storage, which in turn improves the medicinal efficacy of pesticides and has excellent biological effects. have

The hydrocarbon viscous liquid used in the present invention will be described in detail below. (i) As the cooligomer of ethylene and α-olefin, for example, [(CH! CHtHC
Ht CH)y' ] p× (wherein R is CnHtn++ and x, y, p and n are
30≦x, y≦70.5≦p≦8. Oligomers of the formula n=an integer from 1 to 3 are advantageously used.

In the above formula, n=1, x=y=50 and p=lθ
It is more preferable to have a structure satisfying 17. to 60. -Power Atto■ (HC-10, HC-20, HC-4
0,) manufactured by Mikata Petrochemical Industry Co., Ltd., including each brand of IC-100, IC-150, HC-600 and HC-2000) are particularly preferred.

As the isobutylene oligomer which may be used as an additive in addition to this, for example, a crushed oligomer is preferable, and among them, for example, I P
-2835 (number average molecular weight 270) and I P -2
02 and a number average molecular weight of 220) [both manufactured by Idemitsu Petrochemical Co., Ltd. are conveniently used. In addition, chlorinated paraffin, which is another type of additive that may be used in combination, is a liquid obtained by chlorinating paraffin. Contains 70%, specific gravity 1.10
~1.70, average molecular ff of 1,350 to 1,100. [Chlorine content is 40.5% and 4
3.5%, 50%, specific gravity is 1.16 (25℃) respectively
, 1.16 (25°C) and 1.25 (25°C)] are used.

(ii) Process oil is usually used as a softener for synthetic rubber, and is generally produced by distilling crude oil under normal pressure, then distilling it under reduced pressure, and then using a solvent refining method.

This includes those produced through appropriate purification processes such as hydrofinishing, hydrogen reforming, and sulfuric acid refining. Among these, for example, the heavy oil fraction obtained when crude oil is distilled under atmospheric pressure,
Using the so-called hydroreforming method, the distillate obtained through a vacuum distillation device is hydrogenated using a catalyst at high temperature and pressure.
A process oil obtained by purification and further solvent dewaxing with a solvent such as propanepenzole ketone or methyl ethyl ketone is conveniently used. Particularly preferred examples include process oils such as PS-32 and NM-280 manufactured by Idemitsu Kosan Co., Ltd. Isobutylene oligomer, which is an additive that may be used in addition to this,
The cooligomer of ethylene and α-olefin and the chlorinated paraffin are as described above.

(iii) Butadiene-based oligomer refers to one obtained by polymerizing butadiene to a number average molecular weight of about 500 to 4,000, and is, for example, expressed by the formula (in the formula, 10≦n≦70) that does not have a terminal functional group. Butadiene homo-oligomers and, for example, butadiene oligomer glycols having a primary hydroxyl group at both ends (wherein lO≦n≦70), or butadiene oligomers/glycols having carboxyl groups at both ends (wherein lO≦n
≦70) Butadiene oligomers and dicarboxylic acids represented by the following formula are included. For example, the oligomer having the above structure is obtained by living polymerization of butadiene, has a sharp molecular weight distribution, has a weight average molecular weight Mw and a number average molecular weight M
Nl5SO-P where the ratio My/Mn of n is almost close to l
Each brand of BO [manufactured by Nippon Soda Co., Ltd.] (NISSO-PB)
B-1000, B-2000, B-3000, G-1000. Same G-2000, Same G-3000, Same C
-1000) is particularly preferred. The oligomers of isobutylene, oligomers of ethylene and α-olefin, chlorinated paraffin, and process oil that may be used in addition are as described above.

The amount of these additives to be added is not particularly limited, but when added singly, the amount of the additive is 0.0% when multiple additives are added to 100 parts by weight of the powder. .1 to 1oM parts preferably 0.2 to 5
．． It is particularly effective to use 0 parts by weight.

In the present invention, the agrochemical active ingredient used has activities such as insecticidal, bactericidal, and herbicidal, and the technology of the present invention can be applied to all agrochemical powders that need to reduce drift during application. Although not particularly limited, examples include the following compounds. bisthiophosphoric acid
o,o-dimethyl=0-4-nitro-m-tolyl, 0-ethyl phenylphosphonothionate=op-nitrophenyl.

0-2.3-dihydro-3-thiophosphoric acid 2-phenyl-6-pyridazinyl = 0.0-diethyl, S-1,2-bis(ethoxycarbonyl)ethyl dithiophosphate = 0.0-dimethyl, dithiophosphate Acid S-[α-(ethoxycarbonyl)benzyl]=O1O-dimethyl, 0.0-dimethyl dithiophosphate=S-(N-methylcarbamoylmethyl), N-acetylphosphoroamidothiolate o,s-dimethyl (hereinafter (referred to as acephate), 2
,2.2-Trichloro! -Dimethyl hydroxyethylphosphonate, methylcarbamate Q-8ec to butylphenyl (hereinafter referred to as BPMC), 1-naphthyl methylcarbamate, m-tolyl methylcarbamate.

O-cumenyl methylcarbamate (hereinafter referred to as MIPC), bis(thiocarbamic acid) S, S'-[2-(dimethylamino)trimethylene] (hereinafter referred to as Harutab), tetrachloroisophthalonitrile.

S-benzyl thiophosphate = 0.0-diisopropyl,
Dithiophosphate 0-ethyl S, S-diphenyl, plasticidin S, kasugamycin, validamycin A,
S, S'-2-dimethylaminotrimethylene di(benzenethiosulfonate) (hereinafter abbreviated as bensultap), 2-(4-ethoxyphenyl)-2-methylpropyl 3-phenoxybenzyl ether (hereinafter abbreviated as etofenbrox) ), phosphoric acid 2-chloro-1-(2,
Examples include 4-dichlorophenyl)vinylnidiethyl. However, the present invention is not limited to these examples. Further, these may be used alone or in combination of two or more depending on the purpose. Generally, when these active ingredients are used alone, the total amount is 0.0001 to 50 parts by weight per 100 parts by weight of the powder, preferably o,
0.00 to 20 parts by weight is used, but the amount used is not particularly limited.

Mineral powder carrier components are not particularly limited, but more specifically include clay, kaolin, bentonite, acid clay, talcs (talc powder, waxite powder, etc.), silicas (white carbon, diatomaceous earth, etc.).

mica powder, etc.) and calcium carbonate are frequently used.

A stabilizer, a spreading agent, a preservative, etc. may be added to the agrochemical powder of the present invention, as appropriate, without impairing the effects of the above-mentioned additives. Examples of such stabilizers include phosphoric acid, isopropylamide phosphate [manufactured by Nippon Kagaku Co., Ltd., hereinafter referred to as PAP]
Preservatives include EDTA (ethylenediaminetetraacetic acid), epoxidized linseed oil, thiourea, boric acid, etc., and sorbic acid as a preservative.

Potassium sorbate, debydoacetic acid, debydoacetic acid sodium salt, p-oxybenzoic acid butyl ester, etc. are also used as spreading agents, and alkylbenzene sulfonates,
Examples include dioctyl sulfosuccinic acid sodium salt and polyoxyethylene alkyl ether.

The agrochemical powder of the present invention is produced, for example, as follows.

Appropriately pressurizing the hydrocarbon-based viscous liquids (i) to (iii) of the present invention onto a mineral powder carrier and an agricultural chemical active ingredient,
Mix. Next, an appropriate amount of a mineral powder carrier and/or an extender/diluent is added, further mixed, and coarsely ground to obtain an agrochemical powder. In the above mixing, for example, a Nauta mixer (manufactured by Hoyoi Micron Co., Ltd.) is preferably used,
For coarse grinding, for example, a hammer mixer is conveniently used.

Function In the present invention, the hydrocarbon-based viscous liquid added imparts wettability to the agrochemical powder, and can completely suppress the scattering and floating of particles of 1Oμ or less, which especially cause problems in the occurrence of drift. Furthermore, in the present invention, there is no need to take measures such as coarsely granulating the particles, and all of the above-mentioned specific additives can be used without significantly impairing the fluidity, dispersibility, or adhesion of the powder. In order to satisfy the powder physical properties required for an agricultural chemical powder, it is also possible to reduce the particle size as appropriate.

On the other hand, when the agrochemical active ingredient is unstable, particularly when it is an ingredient unstable in water, when applied to the agrochemical powder of the present invention, the biological activity is significantly improved.

Generally, these water-unstable components are easily decomposed by moisture adhering to mineral powder carriers such as clay when they are mixed with or come into contact with mineral powder carriers, and this poses a problem in terms of storage stability and medicinal efficacy. In the agrochemical powder of the present invention in which a viscous liquid is added, the active ingredient is protected by the oil film created by the additive and prevented from being decomposed by water contained in a carrier such as clay, improving stability and improving efficacy. It is assumed that

Thus, especially when producing pesticide powders containing water-labile pesticide active ingredients such as bensultap, cartap, acephate or validamycin,
When the present invention is applied, it can be said that the effects of the present invention in suppressing drift and improving biological activity are remarkable.

EXAMPLES The present invention will be described in detail below, but the present invention is not limited by the Examples.

All parts in the text indicate parts by weight.

Example! In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 3 parts of fine powdered clay for agricultural chemicals and 2.5 parts of Pensultadub raw material were added.
P-28350, 25 parts, Lucant HC-400
, 5 parts and mix for 5 minutes. Next, 0.5 part of white carbon and 93.25 parts of finely powdered clay for pesticides are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain the pesticide powder of the present invention.

Example 2 In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 5 parts of finely powdered clay for agricultural chemicals and 2.5 parts of Bensultap raw material were added.

Add 2.0 parts of MI PC active ingredient, IP-28352,
Part 5.

Add 30 parts of Lucant HC-20000 and mix for 5 minutes. Next, 1.0 part of white carbon, PAPO
15 parts and 86.2 parts of finely powdered clay for agricultural chemicals, and further 1
The mixture is mixed for 0 minutes and coarsely ground with a hammer mill to obtain the agricultural chemical powder of the present invention.

Example 3 In a Nauta mixer (manufactured by Hosokawa Micron), 3.5 parts of agrochemical fine clay and 2.5 parts of Bensultap raw material were added.

Add 3.5 parts of B PMC original substance to I P-2835
0.75 copies.

Add 4 parts of Lucant HC-20000 and mix for 5 minutes. Next, 0.3 parts of white carbon, 1 part of PAPO
5 parts and 88.55 parts of fine powdered clay for agricultural chemicals, and further 1
The mixture was mixed for 4141 minutes and coarsely ground in a hammer mill to obtain the agricultural chemical powder of the present invention.

Example 4 2 parts of fine powdered clay for agricultural chemicals, 2.0 parts of bensultap drug substance, and 0.3 part of validamycin A drug substance were added to a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.) and IP-28351, 2 was added.
55 parts of Lucant HC-200 and mix for 5 minutes. Next, 1.0 part of white carbon and 94.7 parts of finely powdered clay for agricultural chemicals are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain the agricultural chemical powder of the present invention.

Example 5 5 parts of finely powdered clay for agricultural chemicals, 2.0 parts of Bensultap drug substance, and 0.5 part of etofenbrox drug substance were added to a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.) to prepare IP-2835.
Add 1.5 parts and 75 parts of Lucant HC-600G and mix for 5 minutes. Next, 1.5 parts of white carbon and 88.75 parts of finely powdered clay for agricultural chemicals are added, mixed for further 10 minutes, and coarsely pulverized in a hammer mill to obtain the agricultural chemical powder of the present invention.

Example 6 3.5 parts of agrochemical fine powder clay and 2.5 parts of Bensultap raw material were placed in a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.).

IP-202 with 0.5 part of Etofenbrox active ingredient added.
02.0 parts and 1.5 parts of Lucant HC-20 are added and mixed for 5 minutes. Next, 2.0 parts of white carbon and 88 parts of finely powdered clay for agricultural chemicals were added and mixed for an additional 10 minutes.
The agrochemical powder of the present invention is obtained by coarsely grinding with a hammer mill.

In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 5 parts of finely powdered clay for agricultural chemicals and 2.5 parts of Bensultap raw material were added, followed by 3 parts of Lucant HC-6003 and mixed for 5 minutes. Next, 1.0 part of white carbon and 90.7 parts of finely powdered clay for pesticides are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain the pesticide powder of the present invention.

Example 8 In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 3 parts of finely powdered clay for agricultural chemicals and 1.0 part of Bensultap raw material were added.

Add 2.0 parts of MIPC active substance, 3 parts of IP-20200,
Lucant HC-6000, Part 3 and Toyoparax A
- Add 1,0 parts of 40 and mix for 5 minutes. Next, 2.0 parts of white carbon and 90.4 parts of finely powdered clay for pesticides are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain the pesticide powder of the present invention.

Example 9 In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 3 parts of fine powder clay for agricultural chemicals and 1.5 parts of cartap hydrochloride raw material were added.
Lucasototo fl', -dolls part Add 1.0 part of Toyopara-Ix 150 and mix for 5 minutes. Next, 5 parts of PAP O, 2.0 parts of white carbon, and 90.5 parts of finely powdered clay for agricultural chemicals are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain the agricultural chemical powder of the present invention.

Example 1O In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 3 parts of fine powdered clay for agricultural chemicals and 2.5 parts of Cartap hydrochloride raw material, MI
Add 2.5 parts of PC base material and process oil P'5-322
and 0.8 parts of Toyovarax 145 are added and mixed for 5 minutes. Next, 15 parts of white carbon and 87.7 parts of finely powdered clay for agricultural chemicals were added, mixed for further 10 minutes, and coarsely pulverized in a hammer mill to obtain the agricultural chemical powder of the present invention.

Example 11 In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 3 parts of fine powder clay for agricultural chemicals, 1.5 parts of Cartap hydrochloride raw material, and BP were added.
Add 2.0 parts of MC raw material to process oil NM-2801
, and 5 parts of Lucant HC-100.
Mix for a minute. Next, 15 parts of white carbon and 90.5 parts of finely powdered clay for agricultural chemicals were added, mixed for further 10 minutes, and coarsely ground in a hammer mill to obtain the agricultural chemical powder of the present invention.

Example 12 3 parts of finely powdered clay for agricultural chemicals, 2.0 parts of cartap hydrochloride raw material, and 0.5 part of etofenbrox raw material were added to a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.) to form the former 5SO-r'B.
B-20000, 5 parts and Nl5SO-PB G-1
0000, 75 parts and mix for 5 minutes. Next, 1.2 parts of white carbon and 92.0 parts of fine clay for agricultural chemicals.
Add 5 parts of the mixture, mix for another 10 minutes, and coarsely grind with a hammer mill to obtain the agrochemical powder of the present invention.

Example 13 In a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), 3 parts of agrochemical fine clay and 2.5 parts of Bensultap raw material were added.

Add 2.5 parts of MIPC substance to Nl5SO-PB C-1
Add 8 parts of IP-28350 and 85 parts of IP-28350 and mix for 5 minutes. Next, 1.5 parts of white carbon and 88.85 parts of finely powdered clay for pesticides are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain the pesticide powder of the present invention.

Example 14 To a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.) were added 3 parts of agrochemical fine clay and 2.5 parts of Cartap hydrochloride raw material, and 25 parts of IP-28350 and Lucant HC-40.
Add 5 parts of PAP O and mix for 5 minutes. Next, 0.5 part of white carbon and 93.25 parts of finely powdered clay for pesticides are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain the pesticide powder of the present invention.

Next, in order to explain the effects of the present invention in more detail, test examples will be shown in comparison with the following formulations that do not belong to the present invention.

Control formulation example 1 3 parts of finely powdered clay for agricultural chemicals and 2.5 parts of Bensultap raw material were added to a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.), and liquid paraffin [WITCO Chemical Corp.
ora-t 1on (manufactured in the United States)] and mixed for 5 minutes.

Next, 0.5 part of white carbon and fine powder rule for pesticides.
Add 93.25 parts, mix for another 10 minutes, and coarsely grind with a hammer mill to obtain an agricultural chemical powder.

Control Formulation Example 2 5 parts of fine powder clay for agricultural chemicals and 2.5 parts of Bensultap raw material were added to a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.).

Add 2.0 parts of MIPC raw material to polybutene (brand 1001
Add 2.8 parts of 1° manufactured by Idemitsu Petrochemical Co., Ltd. and mix for 5 minutes. Next, 1.0 part of white carbon, PAPO
15 parts and 86.2 parts of finely powdered clay for agricultural chemicals, and further 1
Mix for 0 minutes and coarsely grind with a hammer mill to obtain pesticide powder.

Control Formulation Example 3 5 parts of agrochemical fine powder clay and 2.5 parts of bensultap raw material were added to a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.).

Add 2.0 parts of MI PC bulk to liquid paraffin [WIT
2.8 parts of CO Chemical Corporation (USA)] and mixed for 5 minutes. Next, 1.0 part of white carbon.

5 parts of PAP O and 86.2 parts of finely powdered clay for agricultural chemicals are added, mixed for further 10 minutes, and coarsely ground with a hammer mill to obtain an agricultural chemical powder.

Control Formulation Example 4 5 parts of agrochemical fine clay and 2.5 parts of bensultap were added to a Nauta mixer (manufactured by Hosokawa Micron Co., Ltd.) to form a liquid para7in [111TCO Chemical Co.
rpora-tion (USA)] was mixed under pressure for 5 minutes.

Next, 1.0 part of white carbon and 88.2 parts of finely powdered clay for agricultural chemicals are added, mixed for an additional 10 minutes, and coarsely pulverized with a hammer mill to obtain an agricultural chemical powder.

Control Formulation Example 5 3 parts of agrochemical fine clay and 2.5 parts of Cartap hydrochloride raw material were added to a Nauta mixer (manufactured by Hoyoi Micron Co., Ltd.), and liquid paraffin [WITCO Chemical Corp.
ora-tion (USA)] by pressing 0.75 part
Mix for a minute.

Next, 0.5 part of white carbon and 93.25 parts of finely powdered clay for agricultural chemicals are added, mixed for an additional 10 minutes, and coarsely ground with a hammer mill to obtain an agricultural chemical powder.

Test Example 1 Floatability Index In order to quantitatively express the apparent scattering properties of pesticide powders when sprayed in fields, a new application for rDL powder was ordered by the Agriculture, Forestry and Fisheries Ministry of Agriculture, Forestry and Fisheries Pesticide Inspection Center on October 3, 1981. The buoyancy index was measured using the buoyancy index measurement method described in ``Required Submission Materials'', and the results are shown in Table I.

Table 1 Test Example 2 Dispersion of Active Ingredients The sample was sprayed using the same device used to measure the buoyancy in Test Example 1, and after 5 minutes, 3,012 liters of air was sucked from the top (140 cm from the bottom) of the same device. Collect and quantify the components,
The scattering properties of the active ingredients were investigated and the results are shown in Table 2.

Table 2 Test Example 3 Stability of Active Ingredients After storing the improved pesticide powder according to the present invention and the control formulation shown in Examples in a 40°C thermostat for 30 and 60 days, the active ingredient content was measured. The decomposition rate was determined and the results are shown in Table 3.

Table 3 Test Example 4 Insecticidal Efficacy Test Rice (variety Nakasei Shinsenbon) 50 days after transplantation (plant height 60c+a) planted in a pot with a radius of to and ooo was placed in a Perger duster (inner diameter 30cm, height 50cm). The spray was applied under reduced pressure of 60 cn+Hg using a vacuum pump.

Two hours after spraying, cut off the stems and leaves of the rice plants and place them in polycups (
10 fall armyworm larvae (3rd instar) per rice plant were released into the container (inner diameter 10.5 cm, height 6 cm), and the insecticidal efficacy was determined and shown in Table 4.

Table 4 Note 2 Shows the test results when 200 mg of the active ingredient was sprayed per pot.

The floatability index of the improved formulation according to the present invention is good as shown in Table 1. The present inventors continued their research and measured the dispersibility of the active ingredient by devising a measurement method.As shown in Table 2, the improved formulation of the present invention has significantly improved dispersibility. It can be seen that the adhesion of the active ingredient to the plant body is good. This, together with the low decomposition rate of the active ingredient of the product of the present invention shown in Table 3, is presumed to be the reason for the increased insecticidal efficacy of the improved powder of the present invention.

Effects of the Invention As is clear from the above test examples, the agrochemical powder of the present invention containing a specific viscous liquid can eliminate drift, which has been a problem with adverse effects on humans, livestock, and other animals and plants, by adjusting the particle size. Compared to the conventional method of preventing or adding liquid paraffin, polybutene, etc., it is low cost, has excellent biological properties, and does not impair adhesion, spreadability, or absorption on the plant body. Active and scattering.

This has the effect of reducing floating properties and suppressing drift. In addition, the agrochemical powder of the present invention has the unexpected effect of preventing the decomposition of the agrochemical active ingredient and improving storage stability and medicinal efficacy.

Claims (1)

[Scope of Claims] 1) Agrochemical powder characterized by containing an agrochemical active ingredient, a mineral powder carrier, and a process oil 2) Furthermore, an isobutylene oligomer, ethylene and α-
The agricultural chemical powder according to claim 1, which may contain one or more of an olefin cooligomer and a chlorinated paraffin.