KR960007685B1 - Plant protection powder for stock-base pest control - Google Patents

Abstract

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Description

Pesticide powder for control

FIELD OF THE INVENTION The present invention relates to dust-base pest control powders. Conventionally, agricultural powders have been widely used in Korea as various insecticides, fungicides and mixtures thereof. In general, one of the essences of agrochemical formulations is how to bring the agrochemical active substance as its formulation to each site of the desired plant effectively. Powdered powders are most widely used because they can be used in a relatively simple manner without diluting the commercially available formulations, and by using a mixture, they can simultaneously control various diseases and pests and at the same time save labor. On the other hand, pollution due to scattering during powder spreading becomes a problem. As a powder having reduced drift scattering (drift), driftless powder (DL powder) has been used, and one of the nodes of powder Is solved. However, it is sometimes pointed out that the conventional powder or DL powder is ineffective due to the fact that the pesticide active substance is not effectively reached, particularly against pests in the buttocks. In recent years, the improvement of the foot control effect by the improvement of a scattering mechanism is examined, but the means of effectively solving the lack of a foot control effect by the formula has not been found yet.

As mentioned above, the emergence of the means to overcome the lack of the control effect at the base which is the drawback which the DL powder which added the improvement in drug efficacy and safety as well as the powder which has the merit in practice use is expected, have. In particular, there is a great expectation for the development of accurate and reliable preparations for paperback disease, extinction, and the like, and their use.

An object of the present invention is to provide an agricultural powder or DL powder which can efficiently reach the bottom of a drug and can exert sufficient control against pests that occur on the bottom of rice.

The present inventors have conducted various studies on pest control at the bottom, which is frequently a problem due to lack of effects in conventional powder or DL powder. As a result, the pesticide active substance has a specific particle diameter and a specific mesh body as desired. In the case of the powder whose particle size was adjusted by passing through, the inventors found that it was very effective to control the butt.

In other words, the present invention is a pesticide powder for controlling buttocks, wherein 50% or more of the pesticide active substance is adjusted in the range of 10 to 60 µm (particle diameter by the Coulter counter method).

By the way, as a pesticide active substance mix | blended with powder conventionally, the microparticles | fine-particles of 10-60 micrometers of particle diameters used for this invention are generally used since they have difficulty of a technical aspect, a fall of productivity, and a volume increase, etc. There is little to do, and there was no example which produced the thing of this particle diameter especially for a foot control.

Unexpectedly, however, it has been found that, as an agrochemical active ingredient, at least 50% thereof is effective in controlling the foot when adjusted to a particle diameter in the range of 10 to 60 µm. Furthermore, it was also found that, if desired, the effect was more pronounced when a 200 mesh (74 heel) sieve was passed through during formulation. Thus, the present invention is a powder for pesticide control such as paperback disease or extinction, and the particle diameter of the pesticide active substance is the Coulter counter (for the measuring method and principle, the powder engineering manual, [Particle Engineering Manual] (Nika Kogyo Co., Ltd.), 22-23) 10-60㎛ according to the present invention).

More specifically, in order to prepare the powder of the present invention exhibiting the control effect of the buttocks, 50% or more (more preferably 70% or more, 85% or more) of the original substance of the pesticide active substance itself is used. Is prepared to be adjusted to fall in the range of 10-60㎛, and it is prepared by mixing with a carrier, auxiliary component, and other additives by a conventional method as desired.

In addition, by improving the particle size of the powder powder of the present invention by means such as adjusting the particle size of the component by passing the 200 mesh sieve after mixing each component as desired. Particularly, when the pesticide active material is cohesive or easily agglomerates under the influence of other additives, moreover, when the pesticide active material is used having a particle diameter of 40 to 60 µm, it is preferable to pass a 200 mesh sieve. .

In order to obtain an agrochemical active substance having a particle diameter of 10 to 60 µm, in the crystal formation step, it may be adjusted to produce one having a particle size in the range, or when one having a relatively large particle size is prepared, grinding or spray drying The size can be adjusted by law. In grinding, for example, an atomizer, a turbo counter jet mill, and the like are frequently used. Moreover, you may obtain what has a particle size of a range by spray drying, and may adjust it to what has a desired particle size by further grind | pulverizing it suitably.

As a carrier, auxiliary component, and additive which may be blended with the pesticide powder of the present invention, various fluid aids (such as white carbon), surfactants, dispersants (for example, ethylene glycol, etc.), fixing agents, adsorbents, and antioxidants (for example, For example, dibutyl hydroxy toluene), preservatives (such as sorbic acid), synergists, wetting agents, stabilizers (such as isopropyl acid phosphate), excipients, diluents and, for example, soybean powder, tobacco powder, wheat flour Mineral powders, such as vegetable powders, such as wood powder, for example, clays (kaolin, bentonite, acidic clay, etc.), talc (talc powder, beeswax powder, etc.), and silicas (diatomaceous earth, mica powder, etc.) In addition, solid carriers and auxiliary components, such as calcium carbonate, sulfur powder, and activated carbon, are mentioned.

The agriculturally active substance used in the present invention is not particularly limited, as long as it is a powder for controlling butts. In addition, when it is liquid, it is similarly applied by supporting on a solid carrier.

As the agricultural chemical active substance used in the present invention, for example, the valley again ^R having mungobyeong control effect (Valley the azithromycin), driving Serendipity ^R (pensi kyuron), driving the cut ^R (fluorenyl Tolu not), Bridge panoramic ^R (methoxy Pro carbonyl) etc., having a sseuma myeolgu controlling action and the like side ^R (MTMC), sebin ^R (NAC). In particular, the present invention is reliably applied to ballidamycin. Moreover, you may make it the mixing agent with the pesticide active component which needs these pest control, and another appropriate pesticide active substance as needed. A part of the pesticide active substance which may be mixed is illustrated as an organic sulfur type disinfectant. Ethylene bis (dithiocarbamic acid) zinc, ethylene bis (dithiocarbamine) manganese, ethylene bis (dithiocarbamine) ammonium, bis (dimethyldithiocarbamic acid), ethylene bis (dithiocarbamic acid) 2 zinc and the like; Organic Phosphorus Sterilizer ... Thiophosphoric acid S-benzyl O, O-diisopropyl, dithiophosphoric acid S, S-diphenyl O-ethyl, etc .; Organic Arsenic Fungicides ... Methane iron arsonate, methane iron ammonium iron and the like; Free base fungicide… Pentachlorophenol, tetrachloroisophthalonitrile, 4,5,6,7-tetrachlorotalide and the like; Other fungicides… Tricyclazole, N- (trichloromethylthio) -4- (cyclohexene-1,2-dicarboxyamide, phenazine 5-oxide, 1- (butylcarbamoyl) -2-benzimidazolecarbamic acid Methyl, etc. Organophosphorus insecticide… MEP, dithiophosphoric acid S- [1,2-bis (ethoxy carbonyl) ethyl] O, O-dimethyl, 2,2-dichlorovinyl dimethyl phosphate, 2,2,2-trichloro Rho-1-hydroxyethylphosphonic acid dimethyl, N-acetylphosphoramidothiolic acid O, S-dimethyl, dimethyl phosphate (E) -1-methyl-2-methylcarbamoylvinyl, dithiophosphoric acid O, O- Dimethyl S- [α- (ethoxycarbonyl) benzyl], dithiophosphoric acid O, O-dimethyl S- (N-methylcarbamoylmethyl) and the like; organic base insecticides… 6,7,8,9,10 , 10-hexachloro-1,5,5a, 6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiine 3-oxide and the like; Methylcarbamic acid 1-naphthyl, methylcarbamic acid m-tolyl, methylcarbamic acid o- (sec-butylphenyl) (BPMC) and the like; Insecticide… Pilethrin, alletrin, resmethrin, etc .; Antibiotic agent… Blastidine S, gasgamycin, polyoxine, oxytetracycline, etc .; ) Thiacetoimide acid S-methyl etc. are mentioned.

When the total amount of the formulation of the present invention is 100 parts by weight, the blending amount of valleydamycin is usually 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight, and in the case of two or more types, 0.01 to 10 parts by weight in total, preferably Is 0.1 to 2 parts by weight. In the mixed formulation of ballidamycin, the compounding quantity of the pesticide active substance other than ballidamycin is 100 parts by weight of the whole formulation, and in the case of one type, 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight in total.

The pesticide powder of the present invention exhibits an excellent control effect of splinters against paperback disease or other extinctions as shown in the following prevention effect test. Next, an Example demonstrates this invention further in detail. However, this invention is not bound at all to this Example.

Example 1

Validamycin (average particle diameter 60 µm) showing particle size distribution shown in the following table

0.3 parts by weight

0.1 part by weight of isopropyl acid phosphate

0.5 parts by weight of white carbon

0.1 parts by weight of sorbic acid

99.0 parts by weight of clay

After mixing with a kneader type mixer, the whole amount was remixed with a flash mixer and passed through 200 mesh bodies to obtain powder.

Particle size distribution

10-60μm 51%

60-120μm 45%

120-250μm 4%

Example 2

Powdered powder is obtained in the same manner as in Example 1 using ballidamycin (average particle diameter 39 μm) showing the particle size distribution shown in the following table.

Particle size distribution

1-10μm 6%

10-30 μm 32%

30-60μm 45%

60-120μm 17%

Example 3

Powdered powder is obtained in the same manner as in Example 1, using ballidamycin (average particle diameter 12 µm) showing the particle size distribution shown in the following table.

Particle size distribution

1-5μm 3%

5-10 μm 31%

10-60μm 64%

60-90μm 2%

Example 4

Validamycin (average particle diameter 39 μm) having a particle size distribution shown in the table below

0.3 parts by weight

0.15 parts by weight of isopropyl acid phosphate

1 part by weight of liquid paraffin

White carbon 2.0 parts by weight

0.1 parts by weight of sorbic acid

Clay 96.45 parts by weight

Is mixed with a kneader mixer, and the whole amount is remixed with a flash mixer to obtain a powder.

Particle size distribution

1-10μm 6%

10-30 μm 32%

30-60μm 45%

60-120μm 17%

Example 5

Powdered powder is obtained similarly to Example 4 using ballidamycin (average particle diameter 21 micrometers) which shows the particle size distribution shown in the following table | surface.

Particle size distribution

5-10μm 10%

10-30 μm 57%

30-60 μm 27%

60-90μm 6%

Example 6

Powdered powder is obtained in the same manner as in Example 4, using ballidamycin (average particle diameter 12 µm) having a particle size distribution indicated in the following table.

Particle size distribution

1-5μm 3%

5-10 μm 31%

10-60μm 64%

60-90μm 2%

Comparative Example 1

Powdered powder is obtained in the same manner as in Example 4, using ballidamycin (average particle diameter 115 µm) having a particle size distribution indicated in the following table.

Particle size distribution

10-60μm 18%

60-90μm 23%

90-120μm 21%

120-250μm 38%

Comparative Example 2

Powdered powder is obtained in the same manner as in Example 4, using ballidamycin (average particle diameter 7 µm) having a particle size distribution indicated in the following table.

Particle size distribution

1-5μm 15%

5-10μm 72%

10-30μm 12%

30-60 μm 1%

Using each powder obtained in the Example and the comparative example, the following paperback control effect test was performed.

Test Example 1

Rice paddy disease control effect examination (pyt examination)

8mm 디스크)을 포기당 3개씩 벼체의 밑둥치에 부착하였다. 접종 후 72시간은 벼체를 28℃의 습실(濕實)에 유지하여 발병을 촉진시키고, 그후 유리실로 이동하였다. 발병 조사는 접종 5일 후에 접종 줄기의 병반(病斑) 길이(cm)에 대하여 수행하였다. 얻어진 병반의 길이를 기초로 다음식으로 표시되는 방제가(防除價)에 의하여, 방제 효과를 나타낸다.Rice (variety; Nippon Barre) was planted in three acres in a / 10000 pot and used for the test two months later. Three ports per treatment were used for the test. Dispersion was carried out using a spray gun at a compressor pressure of 2 kg / cm 2 for 150 mg of the formulation against three ports of rice. The incidence of paperback disease was due to inoculation: a fragment of the flora of Rhizoctonia Solani (Rhizoctonia Solani) cultured in potato agar medium immediately after spreading.

8 mm discs) were attached to the base of the rice paddy three per aeration. 72 hours after the inoculation, the rice bodies were kept in a humid room at 28 ° C to promote the onset, and then moved to the glass chamber. The onset investigation was performed on the lesion length (cm) of the inoculation stem 5 days after the inoculation. On the basis of the length of the obtained lesion, the control agent represented by the following formula exhibits a control effect.

Test result

Example 7

Powdered powder is obtained in the same manner as in Example 4, using ballidamycin (average particle diameter 24 µm) having a particle size distribution indicated in the following table.

Particle size distribution

1-10μm 2.1%

10-30 μm 70.6%

30-60 μm 26.3%

60-120μm 1.0%

Comparative Example 3

Powdered powder is obtained in the same manner as in Example 4, using ballidamycin (average particle diameter: 70 µm) having a particle size distribution indicated in the following table.

Particle size distribution

10-30μm 8.4%

30-60 μm 29.8%

60-90μm 38.8%

90-150μm 22.8%

150-250μm 0.2%

Test Example 2

Rice paddy disease control effect examination (packaging test)

Paves transplanted with rice (variety-Koshihikari) on April 6 were partitioned into one compartment of 25 m 2 and used for testing immediately before water extraction. Spreading was carried out using a pipe duster (5 m long) three days before watering (July 2). The development of rice paddy disease was caused by natural occurrence. The onset investigation examined the rate of onset of abandonment in 100 weeks of one compartment after 30 days of spread. Subsequently, the vinegar sites where lesions were recognized were examined for all stems of 10 abandons of abandonment of disease, and the degree of damage was calculated by (Formula 1). Moreover, the packaging damage degree was computed by (Equation 2), and the control value was calculated | required by (Equation 3).

Calculation method (Yoshimura method) of damage degree

까지 병반이 인정되는 줄기의 수N ₃ : leaf or leaf vine

Number of stems to which lesions are recognized

N ₂ : Number of stems whose lesions are recognized up to tea leaves or second leaf

N ₁ : Number of stems whose lesions are recognized up to the third and fourth leaves or the third and fourth leaves

N: total number of stems

(Equation 2) Pavement damage rate (%) = the damage rate of disease abandonment × rate of disease abandonment / 100

(Expression 3) Control price = [(Ic-It) Ic] × 100

Provided that Ic; Pavement damage degree of no dispersion compartment

It; Pavement Damage of Pharmaceutical Spray Blocks

The results are shown in the table below.

It is clear from the above test results that the present invention is excellent as a foot control powder.

Claims (4)

A pesticide powder for controlling buttocks made by adjusting 50% or more of the pesticide active substance to fall within the range of 10-60 µm. The pesticide powder for plantar control according to claim 1, wherein the particle size of the component is adjusted by passing a 200 mesh body. The pesticide powder of Claim 1 which is a powder for rice paddy disease control. The pesticide powder for plantar control according to claim 1, wherein the active ingredient of the pesticide is ballidamycin A.