JPH01301603A - Insecticidal composition - Google Patents

Abstract

PURPOSE:To provide an insecticidal composition particularly useful for controlling the larvae of flies, by containing 1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)urea and a 1,3-dithiolane-2-indenemalonic acid diester. CONSTITUTION:1pt. of 1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)urea and 1-30pts. of a 1,3-dithiolane-2-indenemalonic acid diester are mixed with an appropriate carrier, auxiliary agent, etc., to provide an insecticial composition having a form such as a water dispersible powder, dry flowable formulation, dust formulation, granule or emulsion. The ester includes a lower alkyl ester (e.g. isopropyl ester), lower alkenyl ester, benzyl ester, etc. Two kinds of the active ingredients are optimally used in a form simultaneously contained therein, but even if the respective ingredients are mixed with each other when used or even if the respective ingredients are separately treated with an interval, the object is achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides 1-(4-chlorophenyl)-3-(2,
The present invention relates to an insecticidal composition containing 6-difluorobenzoyl)urea and a diester of 1,3-dithiolane-2-ylidenemalonic acid.

In recent years, the emergence of harmful insects that are resistant to insecticides such as organic phosphate esters, carbamates, and pyrethroid insecticides has become a problem, and their accurate extermination has become an issue. This applies not only to the agricultural field, but also to sanitary pests such as flies and mosquitoes, and it is particularly difficult to exterminate insects that have acquired resistance to various chemicals.

In general, a mixture of resistant and susceptible harmful insects exists, but the present inventors believe that regardless of the degree of resistance,
After considering methods to target harmful insects, we found that
1-(4-chlorophenyl), 3-(2,6-difluorobenzoyl)urea, and 1,3-dithiolane-
Combined use with diester of 2-ylidenemalonic acid K
We have discovered that this method can extremely efficiently control insects, harmful insects, and especially fly larvae.

1-(4-
Chlorophenyl)-3-(2,6-difluorobenzoyl)urea (hereinafter referred to as diflubenzuron) is known as an insect molting inhibitor and is also used in the field of epidemic prevention, but in recent years, insects that are resistant to it have been recognized. ing.

1,3-dithiolane-2 which is the other active ingredient of the present invention
-i+) Diesters of denmalonic acid are also known as pest control agents in Japanese Patent Publication No. 4609/1983.

The insecticidal composition of the present invention exhibits an excellent synergistic insecticidal effect that was unexpected from each single agent, as shown in the examples below.

Examples of diesters of 1,3-dithiolane-2-ylidenemalonic acid include lower alkyl esters, lower alkenyl esters, and benzyl esters. Examples of lower alkyl esters include 01-4 alkyl esters such as methyl, ethyl, propyl, isopropyl, butyl, and isobutyl, and examples of lower alkenyl esters include C2-4 alkenyl esters such as allyl and methylallyl. . The two alcohol residues constituting the diester may be of the same type or different types, but it is more preferable that the two alcohol residues are the same type, even more preferable that they are the same type of di-lower argyl ester, and most preferably A preferred one is noisoprobyl ester (hereinafter referred to as inbrothiolane).

The insecticidal composition of the present invention can be prepared by mixing the two active ingredient compounds with a suitable carrier and/or auxiliary agent according to a conventional method, so that the insecticidal composition can be prepared into a dosage form customary in this field, such as a water use agent, a dry fur sol, etc. It can be prepared into formulations, powders, granules, emulsions, etc.

The ratio of the two active ingredients in the insecticidal compositions of the invention can vary widely. Generally speaking, the amount of noflupenzuron is smaller, and the diester of 1,3-dithiolan-2-ylidenemalonic acid is about 1 part to 30 parts per 1 part of noflupenzuron.

In order to achieve the purpose of the present invention, it is optimal to create a composition containing two types of active ingredients at the same time as described above, but each single agent may be mixed at the time of use, or in some cases The purpose can be achieved even if each single agent is treated separately at a slightly different time.

Although the insecticidal composition of the present invention can be applied in various situations, it is most preferably used as a fly control agent, especially as a insecticide.

The present invention will be explained in more detail below by way of Examples.

Example 1 Wheat bran = f1 part, Jikyo animal powder feed (Funabashi Agriculture 4x
K) To 1 part of the mixture, add a diluted solution prepared by appropriately mixing and dispersing isobrothiolane 10 hydrating powder and Zinlupenzuron 10% water conservancy in the same weight of water, stir, and use it as bait in a plastic cup ( Upper inner diameter 6cnL, JjE inner diameter 4
20 2-day-old house fly (mixed strain) larvae were released into a 2-day-old housefly (mixed strain) and kept at 26°C ± 1°C to examine the rate of emergence into adults, and the rate was corrected by the rate of emergence in the control group. The non-eclosion rate was defined as the eclosion inhibition rate.

The test was held in two consecutive sections, and the results are shown in the table below.

Zuron concentration 0 5 10
20 ppmOppmo 0 8
23 Section 0.5 41 64 (4
1) 87 (46) 100 (55) 1.0
69 97 (69) 100 (71)
100 (76) 2.0 79 100 (
79) Zoo (81) 100 (88) *Expected value 2 If there is no correlation between the susceptibility of the test insects to each single agent, and there is only a non-dependent association effect between the two, then from the a + b mixture The expected emergence inhibition rate Pm is calculated from the following formula. [B115s, C,1, (193
9) Ann.

Appl, Eiol, 26, 585) Pm
=Pa+Pb (1-Pa) However, Pa is the actually measured inhibition rate by only agent A, and Pb is the actually measured inhibition rate by only agent b. Pm indicates the inhibition rate (%) of the mixture.

As is clear from the above table, the insecticidal composition of the present invention exhibited effects far superior to the expected values expected from each single agent.

Example 2 Neogen ξ Uda (Daiichi Kogyo Seiyaku KK) 5.56%,
Gohsenol (Nippon Gosei KX) 2.224
．． Carplex +80 (Giotsugi Pharmaceutical ■α) 5.56
%, Radioly) +200 (Showa Kagaku Kogyo KK) 22.
221, Diflubenzuron 2m and 1,3-dithiolan-2-ylidenemalonic acid dimethyl ester 20% to 78 parts of a carrier made by mixing and pulverizing 64.4.41 of Zikrite (for paper making, Zikrite Chemical Mining KK). An irrigation agent was prepared by mixing the two parts.

When this wettable powder was diluted 500 times with water and applied at 4 liters per square meter on the piles of chicken feces that were causing flies, it prevented the growth of flies for about a month.

Example 3 A hydrating agent was prepared by mixing 74 parts of the same carrier as in Example 1, 25 parts of 1,3-dithiolane-2-ylidenemalonic acid diethyl ester, and 1 part of diflubenzuron, and the hydrating agent was diluted 500 times with water. When diluted and poured 4 liters per square meter of compost where flies were infested, it was able to suppress the fly infestation for about a month.

Claims (4)

[Claims] (1) 1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)urea and 1,3-dithiolane-
An insecticidal composition containing a diester of 2-ylidenemalonic acid. (2) The insecticidal composition according to claim 1, wherein the ester is a lower alkyl ester, a lower alkenyl ester, or a benzyl ester. (3) The insecticidal composition according to claim 2, wherein the lower alkyl ester is an isopropyl ester. (4) The insecticidal composition according to claim 1, which is used for killing maggots.