JPH04334305A - Insecticidal and miticidal composition - Google Patents

Abstract

PURPOSE:To provide the subject insecticidal and miticidal drug showing an excellent control effect on agricultural and horticultural insect pests, forest insect pests and sanitary insect pests, low in its drug toxicity, capable of avoiding drug resistance and having a reduced chemical injury to applied crops. CONSTITUTION:A silicone-based compound represented by the formula (R<1>-R<3> are 1-30C, preferably 1-10C, especially 1-5C alkyl and may be partly substituted or modified with the group selected from H, NH2, COOH and phenyl; n is positive integer) and preferably having 1-1000000cst (25 deg.C) is used in an amount of 100-50000ppm, preferably 2000-20000ppm as the active component and an emulsifier, e.g. an anionic, cationic or nonionic surfactant is preferably further admixed therewith, thus giving the objective insecticidal and miticidal drug. The resultant insecticidal and miticidal drug shows the above-mentioned effects and shows a remarkable control effect especially on mites, Hemiptera and Lepidopetra. A remarkable control effect is shown not only on adults or rubs thereof but to egg thereof.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insecticide/acaricide composition containing a silicon compound as an active ingredient, and more particularly to an insecticide/acaricide composition for agriculture and horticulture containing a silicon compound as an active ingredient.

0002

[Prior Art and Problems to be Solved by the Invention] In recent years, chemically synthesized insecticides and acaricides have become widespread and are being applied to various crops such as fruit trees and vegetables. However, the problem with chemically synthesized insecticides and acaricides has been that as they are used, target insect pests and mites develop drug resistance. Furthermore, although organic phosphorus compounds, carbamate compounds, and pyrethroid compounds that have been widely used in the past have excellent insecticidal and acaricidal activity, they have the problem of high toxicity.

Under these circumstances, agricultural machine oil is known as a drug that can avoid drug resistance, but it has the problem of easily causing chemical damage to crops. Therefore, it has been desired to develop new agricultural and horticultural insecticides and acaricides that have low toxicity, avoid drug resistance, and reduce chemical damage to crops to which they are applied.

0004

[Means for Solving the Problems] As a result of intensive studies to solve the problems, the present inventors discovered for the first time that a certain type of silicon compound satisfies the above-mentioned requirements, and completed the present invention. reached. That is, the gist of the present invention resides in an insecticidal/acaricide composition containing a silicone compound represented by the following general formula (I) as an active ingredient.

[0005]

[Case 2]

(In the above formula, R1 to R3 each independently represent a C1 to C30 alkyl group, and n represents a positive integer.) The present invention will be explained in detail below. C1 to C defined in R1 to R3 of the general formula (I)
As the alkyl group of 30, methyl group, ethyl group, n-
propyl group, iso-propyl group, n-butyl group, is
o-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, iso-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, n-nonyl group,
n-decyl group, n-dodecyl group, n-pentadecyl group,
Examples include n-eicosyl group, n-pentacosyl group, n-triacontyl group, and the like.

In the present invention, silicon compounds in which R1 to R3 each independently represent a C1 to C10 alkyl group are preferred, and silicon compounds each representing a C1 to C5 alkyl group are particularly preferably used. In addition,
A portion of such alkyl groups may be substituted or modified with a group selected from a hydrogen atom, an amino group, a carboxyl group, and a phenyl group.

Further, n is a positive integer, but if the viscosity of the silicon compound is 1 to 1,000,000 cst (25
℃) is preferable. A specific example of such a silicone compound is “SH200 oil”.
(manufactured by Toray Silicone Co., Ltd., dimethylpolysiloxane), “BY16-140” (manufactured by Toray Silicone Co., Ltd., dimethylpolysiloxane), “SH1107” (manufactured by Toray Silicone Co., Ltd., dimethylpolysiloxane)
(manufactured by Toray Silicone Co., Ltd., methylhydrogenpolysiloxane), "SH510" (manufactured by Toray Silicone Co., Ltd., methylphenylpolysiloxane, "SH55"
0” (manufactured by Toray Silicone Co., Ltd., methylphenylpolysiloxane, “SH710” (manufactured by Toray Silicone Co., Ltd.)
Co., Ltd., methylphenylpolysiloxane, "SH702"
"(manufactured by Toray Silicone Co., Ltd., phenylmethyldimethylpolysiloxane, "SH704" (manufactured by Toray Silicone Co., Ltd., tetramethyltetraphenyltrisiloxane, "SH705" (manufactured by Toray Silicone Co., Ltd.,
Pentaphenyltrimethyltrisiloxane, “BY16”
-850" (manufactured by Toray Silicone Co., Ltd., amino-modified silicone), "BY16-853" (manufactured by Toray Silicone Co., Ltd., amino-modified silicone), "BX16-
880” (manufactured by Toray Silicone Co., Ltd., carboxyl-modified silicone), “BY16-750” (manufactured by Toray Silicone Co., Ltd., carboxyl-modified silicone), “
L-45" (manufactured by Nippon Unicar Co., Ltd., dimethylpolysiloxane), "KF96" (manufactured by Shin-Etsu Chemical Co., Ltd., dimethylpolysiloxane), "KF96H" (manufactured by Shin-Etsu Chemical Co., Ltd., dimethylpolysiloxane), "KF857~869"
(manufactured by Shin-Etsu Chemical Co., Ltd., amino-modified silicone), “X-
22-3701E" (manufactured by Shin-Etsu Chemical Co., Ltd., carboxyl-modified silicone), "TSF451 series (manufactured by Toshiba Silicone Co., Ltd., dimethylpolysiloxane), and the like.

These silicon compounds may be used alone or in combination. Furthermore, in the present invention, it is more preferable to use the silicone compound in addition to an emulsifier. Such emulsifiers include anionic surfactants, cationic surfactants, nonionic surfactants, and the like.

[0010] As the anionic surfactant, -CO
OM (M is an alkali metal such as potassium or sodium,
NH4, representing an amine residue such as triethanolamine), a sulfonate represented by -SO3 M (M is the same as above), -OSO3 M (M is the same as above) sulfate ester salt,

[0011]

[Chemical formula 3]

[0012] A substance having an anionic property-imparting group such as a phosphate ester salt represented by (M is the same as above) is used,
Specifically, carboxylic acid salts such as potassium laurate, sodium myristate, potassium palmitate, sodium stearate, dimethylethanolamine myristate, "Emar" (manufactured by Kao Corporation, sodium alkyl sulfonate), " Daybrozin K-25” (manufactured by Toho Chemical Industry Co., Ltd., potassium dehydroabietate), “
Perex NB” (sodium alkylnaphthalene sulfonate), “Demol NL” (sodium naphthalene sulfonate formalin condensate), “Levenol WS” (sodium polyoxyethylene alkylphenyl ether sulfate), “Electrostripper K” (polyoxyethylene dialkyl Potassium ether phosphate), Demol EP" (manufactured by Kao Atlas Co., Ltd., sodium polyacrylate), "Nikkor SMD-10" (manufactured by Nikko Chemicals Co., Ltd., sodium salt of styrene-maleic acid copolymer), etc. It will be done.

The cationic surfactant has the general formula

[
0014

[C4]

(In the formula, R4 represents an alkyl group or an aryl group which may contain a substituent, and R5 and R6 represent a hydrogen atom or an alkyl group.) Examples include salts, quaternary ammonium salts, and polyoxyethylene alkylamine salts. Specifically, stearylamine, laurylamine, octylamine, tetradecylamine, stearylaminopropylamine, distearylamine, dimethyloctylamine, dimethyldecylamine, dimethyllaurylamine, olefin-maleic anhydride copolymer or adduct Examples include salts of acetic acid, hydrochloric acid, etc., such as imidized products of dimethylaminopropylamine.

Examples of nonionic surfactants include sorbitan dialkyl esters, sorbitan trialkyl esters, ethylene glycol condensates of sorbitan alkyl esters, fatty acid polyethylene glycol condensates, aliphatic amide polyethylene glycol condensates, and aliphatic amine polyethylene glycol condensates. , aliphatic alcohol polyethylene glycol condensate, alkylphenol polyethylene glycol condensate, polypropylene glycol polyethylene glycol condensate, and the like.

When the compound of the present invention is applied, it may be used in any formulation such as an aqueous solution, a wettable powder, an emulsion, or a suspension. In addition, the insecticide and acaricide of the present invention may be mixed or used in combination with other fungicides, insecticides, acaricides, etc. other than the agent of the present invention, if desired, to create a multipurpose composition with excellent efficacy. is also possible.

The insecticide/acaricide of the present invention exhibits excellent control effects against agricultural and horticultural pests, forest pests, and sanitary pests, and has remarkable control activity against, for example, the following order Acarina, Hemiptera, and Lepidoptera. has. Furthermore, it has remarkable control activity not only against these adults and larvae but also against eggs. 1st order of mites; citrus spider mite, apple spider mite, two-spotted spider mite,
Spider mites such as Kanzawa spider mite and false red spider mite; Ixodes mites such as Ixodes mites and Kazuki mite; Scale insects such as green leaf mite; Aphids such as peach aphid; 3 Lepidoptera; diamondback moth, Spodoptera vulgaris, etc. of the present invention The concentration of insecticides and acaricides used is 100pp.
m to 50,000 ppm, more preferably 200
When used in the range of 0 ppm to 20,000 ppm, there is no chemical damage to agricultural crops and high insecticidal and acaricidal effects can be obtained.

[0019]

EXAMPLES The present invention will be explained in more detail with reference to examples below, but the present invention is not limited to the following examples unless it exceeds the gist thereof. Formulation Example 1 Dimethylpolysiloxane manufactured by Toray Silicone Co., Ltd. 45% by weight SH-200 (10
0 CST)
Myristic acid dimethylethanolamine salt 5% by weight
water

50% by weight Formulation Example 2 Dimethylpolysiloxane manufactured by Toray Silicone Co., Ltd.
45% by weight
SH-200 (100CST) Toho Chemical Co., Ltd. Solpol 3005X
5% by weight
water
5
0% by weight formulation example 3 Dimethylpolysiloxane manufactured by Toray Silicone Co., Ltd.
45% by weight
SH-200 (5CST) Toho Chemical Co., Ltd. Solpol 3005X
5% by weight
water
50% by weight Formulation Example 4 Dimethylpolysiloxane manufactured by Toray Silicone Co., Ltd.
45% by weight
SH-200 (1000CST) Toho Chemical Co., Ltd. Solpol 3005X
5% by weight
water

50% by weight Formulation Example 5 Dimethylpolysiloxane manufactured by Toray Silicone Co., Ltd.
45% by weight
SF8417 Manufactured by Toho Chemical Co., Ltd.
Solpol 3005X
5% by weight
water
50% by weight comparative formulation Paraffin wax (melting point 155°F) 45% by weight Toho Chemical (
Solpol 3005X manufactured by Co., Ltd.
5% by weight
water
50
Weight% Example 1 Effect on adults and eggs of two-spotted spider mites Ten female adult two-spotted spider mites were inoculated onto the primary leaves of kidney beans, and left indoors for 24 hours to allow them to lay eggs. The compound of the present invention and a comparative formulation prepared according to the formulation of Formulation Example 1 were diluted with water to give an active ingredient concentration of 10,000 ppm, 25
00 ppm and 625 ppm. The leaves holding the adult female insects and eggs of the two-spotted spider mite were immersed in this chemical solution for 5 seconds, and left in a constant temperature room at 25+1°C (repeat twice).

Five days after the treatment, the survival of the adult insects was investigated, and the adult killing rate (%) was calculated using the following formula. At the same time, we also investigated the hatching status of eggs and the survival of hatched larvae. The effect on eggs was judged using three grades: ○ (survival rate 0%), △ (survival rate less than 20%), and × (survival rate 20% or more). The results are shown in Table 1 below.

[0021]

[Table 1]

Example 2 Effect on adults and eggs of two-spotted spider mites Ten female adult two-spotted spider mites were inoculated onto the primary leaves of green beans, and 24
The eggs were left indoors for an hour to allow them to lay eggs. Formulation example 2, Formulation example 3,
The compounds of the present invention and comparative formulations prepared according to the formulations of Formulation Examples 4 and 5 were diluted with water to give active ingredient concentrations of 10,000 ppm, 2,500 ppm, and 1,250 ppm.
It was adjusted to be m. The leaf holding the female adult two-spotted spider mite and eggs was immersed in this chemical solution for 5 seconds.
It was left in a constant temperature room at 5+1°C (2 repetitions).

Five days after the treatment, the survival of the adult insects was investigated, and the adult killing rate (%) was calculated using the following formula. At the same time, we also investigated the hatching status of eggs and the survival of hatched larvae. The effect on eggs is 〇 (survival insect rate 0%), △ (survival insect rate less than 20%), and × (survival insect rate 20% or more).
Judgment was made by grade. The results are shown in Table 2 below.

[0024]

[Table 2]

Example 3 Effect on Spodoptera larvae The compounds of the present invention and comparative formulations prepared according to the formulations of Formulation Example 2, Formulation Example 3, Formulation Example 4, and Formulation Example 5 were diluted with water,
Active ingredient concentration is 10000ppm, 2500ppm
, 1250 ppm. Cut cabbage leaves (5 cm x 5 cm) were immersed in this chemical solution for 1 minute. After soaking, air dry and place in a plastic cup (diameter 7cm).
Five 3rd instar larvae of Spodoptera japonica were released into this, resulting in 25+
It was left in a constant temperature room at 1°C (2 repetitions).

Five days after the treatment, the survival of the adult insects was investigated, and the adult killing rate was calculated using the following formula. The results are shown in Table 3 below.

[0027]

[Table 3]

Example 4 Effect on diamondback moth larvae The compound of the present invention and comparative formulation prepared according to the formulations of Formulation Example 2, Formulation Example 3, Formulation Example 4, and Formulation Example 5 were diluted with water, and the active ingredient concentration was 10,000 ppm. , 2500ppm, 125
Adjusted to 0 ppm. Cut cabbage leaves (5 cm x 5 cm) were immersed in this chemical solution for 1 minute. After soaking, the mixture was air-dried and placed in a plastic cup (7 cm in diameter), into which five third instar larvae of diamondback moth were released and left in a thermostatic chamber at 25+1°C (two repetitions).

Four days after the treatment, the survival of the adult insects was investigated, and the adult killing rate was calculated using the following formula. The results are shown in Table 4 below.

[0030]

[Table 4]

Example 5 Effect on green peach aphid nymph The compound of the present invention and the comparative formulation prepared according to the formulations of Formulation Example 2, Formulation Example 3, Formulation Example 4, and Formulation Example 5 were diluted with water to determine the concentration of the active ingredient. 10000ppm, 2500ppm
, 1250 ppm. A leaf of a young radish seedling was cut, inoculated with two nymphs of the green peach aphid, and the petiole was placed in a 5 ml screw cap bottle in water. This was placed in a glass cylinder with a diameter of 3.5 cm and a height of 18 cm, covered with a cap covered with mesh, and left indoors for 7 days to give birth. After removing the nymphs of this green peach aphid and the leaves holding the nymphs and counting the number of nymphs, the nymphs were immersed in the prepared chemical solution for 5 seconds, and then placed in a glass cylinder in the same way as above and left in a constant temperature room at 25+1℃. did(
2 repetitions).

Four days after the treatment, the survival of the nymphs was investigated, and the nymph killing rate was calculated using the following formula. The results are shown in Table 5 below.

[0033]

[Table 5]

[0034]

[Effects of the Invention] The insecticidal/miticide composition of the present invention is non-toxic because its active ingredient is silicone oil.
It is an excellent insecticide and acaricide.

Claims (1)

[Claims] 1. An insecticide/acaricide composition containing a silicone compound represented by the following general formula (I) as an active ingredient. [Formula 1] (In the above formula, R1 to R3 are each independently C1 to
2. The composition according to claim 1, containing an emulsifier.