JPH02149501A - Rodenticide - Google Patents

Abstract

PURPOSE:To obtain excellent rodenticide without necessary of mixing with feed to which rat shows acceptability by almost uniformly dispersing active ingredient of rodenticide such as ANTU (alpha-naphthylthiourea) or warfarin into matrix composed of metallic salt of higher fatty acid. CONSTITUTION:The aimed rodenticide contains 5-30wt.% active ingredient of rodenticide such as ANTU, bromadiolone, calciferol, coumarin, thallium sulfate, warfarin, zinc phosphide or arsenous acid within matrix composed of metallic salt of higher fatty acid. As a metallic salt of higher fatty acid, especially animals and plants oil as triglyceride of mixture of 12-18C higher fatty acid, e.g. alkali (earth) metallic salt of mixed higher fatty acid obtained by saponification of beef tallow, lard, coconut oil, palm oil or peanut oil, etc., is preferable. Animals and plants oil for improving dispersibility into matrix of active ingredient, etc., and crop powder for improving acceptability, etc., are added to said rodenticide material and the mixture is shaped to pellet or granular shape, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rodenticide, and more particularly to a rodenticide in which an active rodenticide ingredient is coated with a matrix of a higher fatty acid metal salt.

[Prior Art] Various rodenticides containing active rodenticide ingredients such as warfarin, crimidine, silyloside, thallium sulfate, and zinc phosphide have been used to exterminate residential rats.

A rodenticide has been disclosed in which a core consisting of these rodenticidal active ingredients is encapsulated in a lipid that is not repellent to rodents and encapsulated in microcapsules (Japanese Patent Application Laid-open No. 192701/1983 [Problems to be Solved by the Invention] ] Rats usually exhibit repellency to the above-mentioned rat-killing active ingredient;
Even if you feed them food containing these, they will not eat them easily, so
It is extremely difficult to obtain the desired killing effect.

The invention cited above encapsulates the rodenticidal active ingredient with lipids, such as hydrogenated oils obtained from animals and plants, fatty acids, wax ti, etc., for the purpose of reducing the repellency of rats to the rodenticidal active ingredient. However, since rats do not show any preference for these lipids, they must be given along with food that rats prefer.

An object of the present invention is to provide f with a rodenticide containing an active rodenticide ingredient that is palatable to rats.

(Means for Solving the Problems) As a result of intensive research to achieve the above object, the present inventors have found that metal salts of higher fatty acids, which are palatable to rats, that is, metal soaps are effective in hiding the effective rat-killing ingredients. They found that it is extremely effective and completed the present invention.

The present invention is a rodenticide characterized in that an active rodenticide ingredient is coated with a matrix of higher fatty acid metal salt.

In the present invention, the rodenticidal active ingredient is a drug that causes death of HL when administered orally in a small amount to rats. In particular, it is preferable to use a drug that, when orally administered to a mouse, causes the mouse to die of thirst in a public place.

These rat-killing active ingredients include Antu, Promadiolon, Calciferol, Camphuechlor,
α-chloralose, chlorophanone, coumachlor,
Coumarin, comatetralyl, climidine, teifexnum, guifanone, endrin, norpolmite,
Vinton, pyranocoumarin, sililoside, sulfaquinosaline, thallium sulfate, warfarin, zinc phosphide,
Examples include yellow phosphorus and arsenite.

On the other hand, higher fatty acid metal salts are higher fatty acids obtained by saponifying a single or 2 inn or more /I'A compound of a saturated or unsaturated linear or branched higher fatty acid having 6 to 20 carbon atoms. Alkali metal salts and/or alkaline earth metal salts such as sodium salts, potassium salts, and calcium salts, that is, metal soaps. In particular, carbon number 1
Animal and vegetable oils that are triglycerides of mixtures of 2 to 18 higher fatty acids, such as beef tallow, pork fat, Tonoura, Palmura,
Preferred are alkali metal salts and/or alkaline earth metal salts of mixed higher fatty acids obtained by saponifying peanut oil and the like.

The rodenticide consists of a matrix of the higher fatty acid metal salt on the surface of the rodenticide active ingredient by substantially uniformly dispersing the rodenticide active ingredient in a matrix formed of the higher fatty acid metal salt. &I'd.

In order to eliminate the evasiveness that rats exhibit toward the rodenticidal active ingredient, it is preferable that the rodenticidal active ingredient is contained in an amount of 50% or less of the total amount. It is 5 to 30% by weight.

The R11 agent of the present invention contains additives intended to improve the dispersibility of the active rodenticide ingredient in the higher fatty acid metal salt matrix, such as lily, higher alcohol, higher fatty acid, and glycerin. Higher fatty acid esters and the like can be added. It is also possible to add additives for the purpose of improving the palatability of rats, such as carrion powder. Furthermore, H1-induced substances, fragrances, coloring agents, etc. can also be added.

There is no particular restriction on the shape of the rodenticide, and it can be in any shape such as granules or pellets.

Rodenticides can be prepared by mixing the effective rodenticide ingredient and a higher fatty acid metal salt thoroughly and then molding it into pellets using an extruder, by compression molding it into any shape after the kneading, or by molten higher fatty acid metal. Adding active rodenticide ingredients to salt iJX Use IT to spray and granulate a homogeneous melt or slurry! l! can be built. However, the method for producing the rodenticide is not limited to the above-mentioned method, and any known method used for ordinary kneading, kneading, or molding of a melt may be employed.

[For production]

The rodenticide of the present invention is characterized in that the rodenticide active ingredient is coated with a matrix of higher fatty acid metal salt.

In the present invention, the rat-killing active ingredient has been shown to be palatable to rats. ! By doing so, the odor of the active rat-killing ingredient, which is the cause of the repellency shown by rats to the active rat-killing ingredient, is concealed, and even if it is not mixed with food that has a special taste, it is possible for the rat to have a preference for it. show.

If the content of the rodenticide active ingredient in the rodenticide is excessive, the effect of hiding the rodent repellency exhibited by the higher fatty acid metal salt matrix against the R11 active ingredient is reduced. Therefore, it contains active rat-killing ingredients! The content of silicon is preferably 50% by weight or less, more preferably 5 to 30% by weight of the entire agent.

〔Example〕

The present invention will be explained in more detail with reference to Examples and Comparative Examples.

However, the scope of the present invention is not limited in any way by the following examples.

In addition, in the following examples, [part J and "% j" are based on weight unless otherwise specified.

(1) Preparation of rodenticide (a) Sample A-1 25 parts of sodium stearate, 25 parts of carunium stearate, and 40 parts of glycerin monostearate were placed in a heating can, and 10 parts of warfarin were heated and melted at 25°C. A uniform slurry was prepared by adding and mixing the following parts. The obtained i8 f4 slurry was sprayed into cold air from a nozzle, cooled and solidified, and a granular rodenticide sample F4A1 having an average particle size of 0.5 mm was prepared for j times.

(b) Sample A-2 25 parts of sodium stearate, 25 parts of sodium oleate, 30 parts of stearic acid, and 20 parts of warfarin were charged into a Nigu, and after uniformly kneading, a roll extruder was used to form a 0.5 mm diameter A pelletized rodenticide: Sample A-2 was prepared by extruding it through a screen.

(C) Sample A-3 30 parts of mixed higher fatty acid calcium salt commercially available as cattle feed (trade name: Bypass Oil, manufactured by NOF ■), 30 parts of hydrogenated castor oil fatty acid, and 3 parts of 54° hydrogenated beef tallow oil.
0 parts were placed in a heating can, heated and melted at 110'C, and 10 parts of warfarin was added and mixed to prepare a uniform slurry. The obtained molten slurry was sprayed into cold air from a nozzle to cool and solidify, thereby obtaining granules having an average particle size of 0.5 mm. This granular material was pressure-molded to prepare a cube-shaped rodenticide: Sample A-3.

(d) Comparative sample CA-1 After heating and melting 90 parts of 54° hardened beef tallow oil, 10 parts of warfarin was added and mixed to prepare a /8 melt slurry, which was then treated in the same manner as in Section C1 above to form a cube-shaped slurry. Rodenticide: Comparative sample CA-1 was prepared.

(2) Administration test Each of Samples A-1-A-3 and Comparative Sample-1 prepared in the above-mentioned section (2) was prepared with 20% of the rodenticidal active ingredient.
The mice were placed in separate dishes so as to be equal to 10 g, placed in a square of an enclosure containing 10 hχ mice, and observed.

Water was provided ad libitum during this period.

All rats died within 5-13 days. As a result of examining the containers at this point, all of the samples A-1 to A-3 had traces of being eaten, but all the digits of the administered sample remained in the comparative sample--i.

It provides a rodenticide that can be used to kill rats, and its significance from a public health and industrial perspective is extremely large.

Claims (1)

[Claims] (1) A rodenticide characterized by coating an active rodenticide ingredient with a matrix of higher fatty acid metal salts.