JPS59137402A - Stabilized insecticidal composition - Google Patents

Abstract

PURPOSE:To provide a stabilized insecticidal composition containing potassium phthalimide as a stabilizer or a decomposition preventing agent to suppress the decomposition of 2H,1,3-thiazine tetrahydro-2-(nitromethylene). CONSTITUTION:The objective stabilized insecticidal composition is obtained by adding potassium phthalimide to an insecticidal composition containing 2H,1,3- thiazine tetrahydro-2-(nitromethylene) (abbreviated as TTNM). The amount of the potassium phthalimide is preferably 0.1-5wt% based on the resultant preparation. The effect of the stabilizer is most remarkable when the stabilizer is added to a preparation containing powdery carrier, e.g. powder, DL-type powder, fine granule, wettable powder, etc. in which TTNM is most liable to be decomposed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides 2H,1,3-
thiazinetetrabitoro2-totromethylene) (
It is abbreviated as TTNM. ) as an active ingredient!
J,! The present invention relates to a stable insecticidal composition characterized in that phthalimide is added as a stabilizer or decomposition inhibitor of T T N M in the composition.

H T T N M refers to Japanese Patent Application Laid-open No. 50-151882 and Japanese Patent Application Publication +1? (It is known in Publication No. 52-151727 that it has an excellent effect on controlling rice pests such as Nika 7 noinayu and T. truncatus japonicum. However, TTNM decomposes over time and its stability decreases. In particular, the decomposition of TTNM is carried out on a mineral carrier to produce powders, DL (driftless) type powders, fine granules, etc.
The effect is significant when used as granules and irrigation agents. This phenomenon is caused by the surface activity of the powder carrier, but T T N M itself also decomposes due to heat, light, water, etc. Therefore, this undesirable property poses a major hindrance to the formulation of agricultural chemicals containing TTNM, and a solution to this problem is desired.

Until now, as a prior art for preventing the decomposition of TTNM,
In JP-A-1T/+ 57-2208, polyvalent compounds having 2 to 3 hydroxyl groups bonded to a benzeno nucleus such as resorcinol, α-naph)-ole, β-naph)-ole, hydroquinone, and catechol are described. The use of pheno-2resn has been proposed. Furthermore, in Japanese Patent Application Laid-open No. 57-18604, potassium citrate, potassium sulfur, potassium malonate, potassium inebriant, potassium apple liquor, potassium succinate, potassium benzoate, potassium phthalate, potassium substituted benzoate, potassium lactate, etc. , potassium tartrate, potassium oleate, potassium sulfurate, potassium chloride, potassium valmitate, potassium stearate, potassium propionate, etc., or organic potassium 1 to 3°, monobasic potassium phosphate, dibasic potassium, etc. It has been proposed to use phosphorus oxyacid potassium salts such as potassium phosphorus, tribasic potassium phosphate, potassium pylori 7fft, potassium metaphosphate, potassium tripolyphosphate, potassium hexametaline, and potassium alkyl phosphate. Tokukai 11 again? J57-1860
No. 5 proposes the use of urea and urea, which have an upper limit on their thermal stability. However, these techniques cannot necessarily be considered as satisfactory in terms of the stabilizing effect of TTNM.

The present inventors have conducted various studies on stabilizing TTNM in preparations containing TTNM. As a result, it was found that the addition of potassium phthalimide significantly suppressed the decomposition of TTNM.

The insecticidal composition of the present invention, which contains phthalate and potassium phthalate, has no problems in terms of chemical damage to Ishikawa crops or human toxicity.

In addition, the agricultural chemical formulations to which the L stabilizer is added are not particularly limited, but include powders in which TTNM is most susceptible to decomposition, such as powders, DL type powders, fine granules, granules, and wettable powders. When added to preparations for body use, the anti-degradation effect is significantly improved.

The amount of stabilizer added to the formulation is generally 0.1~
A range of 5% by weight is sufficient. However, the amount added may be increased or decreased depending on the type of active ingredient formulation J[)-111↓, dosage form, environmental conditions in which the product is stored, etc. In addition, when storing the main ingredient as is, the amount added to the main ingredient varies depending on the environmental conditions in which it is stored, but is 1 to 10Φ:
The % range is appropriate, and even if the amount added is increased or decreased to some extent, there will be no adverse effect on the main ingredient.

Support materials that can be used without invention include -Ap mineral carriers such as clay, talc, bentonite, resistant clay, diatom, silica sand, Ceolite I, etc., or calcium carbonate, fX l't magnesium, sulfuric acid. Examples include sodium, ammonium sulfate, calcium sulfate, synthetic hydrated silicic acid, calcium silicate, magnesium silicate, aluminum oxide, and sucrose.

Examples of the insecticidal composition of the undiscovered J are shown below, but the content of the present invention is not limited to these examples only, and the content of the active ingredient, the amount of stabilizer added, The types of various adjuvants, their addition, the 1-1 formulation method, etc. can be changed as appropriate. In the Examples, all parts are by weight.

An example of a garden = 2 parts of TTNM, 1 part of white carphone, phthalimide, then crushed and made into wood 9. Obtain a light powder.

Shakusho - 1 granule roughening clay 92.5 parts and polyhinyl alcohol 1. Mix well and knead 15 parts of water and 15 parts of water, extrude through a wire mesh with a diameter of 0.8 mm and dry.
Prepare empty granules that are sieved to a consistency of 14 to 32 mm. Apart from this, TTNM Part 3, White Carphone
1 part and 2 parts of potassium phthalimide are uniformly mixed and then ground. The empty granules described above are added and mixed, and the surface of the empty granules is coated with +, : T T N M to obtain the granules of the present invention.

Kudo Yu-A Mizukari Hitoshi TTNM 50 parts, potassium phthalimide 3 parts, white carbon 20 parts, polyoxyethylene alkyl, nyl ether 1.5 parts, licunisulfone Wr
b3)''; After uniformly mixing b and 22.5 parts of clay, the mixture is pulverized to obtain the wettable powder of the present invention.

90 parts of TTNM, 5 parts of potassium phthalimide, and 5 parts of white carbon were added and mixed uniformly to form a main ingredient.

Test Example 1 Note: 20 parts of the preparation prepared according to Example 1 were placed in a 50 m capacity glass container with a sealed stopper and stored in a thermostat at 40°C for 30 days. Thereafter, the content of TTNM was measured using a gas chromatography; the residual rate (%) was calculated based on the graph based on the initial content value. The printed result is the first
Shown in the table.

G 2ε Supplement 1F Book ■ (Japanese C; 2nd year λ month 7 [ko 1 purport 'I'li') 4i Official Kazuo Wakasugi Tono 2 Name of the invention Stabilized insecticidal composition 3 So111・Relationship with matter Patent applicant 5, drawing 1: subject 6, content of amendment 1) "Phthalimide" in page 1, line 13, 1-1 is amended to "phthalimide potassium."

Claims (1)

[Claims] An insecticidal composition containing 2H,1,3-thiazinotetrahydro-2-(nitromethylene/) as an active ingredient, characterized by adding potassium fucurimito. Composition.