JP2007137845A - Slug exterminator and slug extermination method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a slug exterminator having excellent a rapid effect and to provide a slug extermination method that maintains a large catching and killing effect for a long period of time. <P>SOLUTION: The slug exterminator comprises a mixture of brewer's yeast as an attractant component and methomyl wettable powder (Lannate(R)) as an insecticidal component. The amount of the insecticidal component is 0.05-10 wt.% based on the attractant component. The slug exterminator A is formed into a dumpling state of about a ping-pong ball size, held in a container 2, immersed in water in the container 2 so as to keep a wet state and used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a slug extermination agent and a extermination method.

Slugs are nocturnal pests that feed on vegetables, fruits, and flowers, and have been known to be killed using beer as an easy method of extermination. Also, slug extermination agents that use rice bran, sake lees, etc. as an attracting component and a metaaldehyde-based drug as an insecticidal component are known from Patent Document 1 and Patent Document 2, and are generally widely sold and used.
JP 09-098703 JP 03-130203 A

However, although the method using beer is possible at a general household level, such as using leftovers, it is practically impossible to collect this and provide it to the market as a product.
In addition, commercially available products that use metaldehyde as an insecticidal component have a problem in that they have a slow-acting effect and lack in-situ killing power, making it difficult to determine the insecticidal effect.

  Moreover, in the method using conventional beer, there is a problem that the active ingredient volatilizes in a short time, and the effect is rapidly attenuated. On the other hand, the commercially available product is dry and granular, so it is particularly vulnerable to rainfall. However, there was a shortcoming of losing efficacy in a few days due to dissolution, and there was still a need for improvement.

  The problem to be solved by the present invention is to provide to the market a slug pesticide excellent in rapid action. Another object of the present invention is to provide a slug extermination method that can maintain a large killing power over a long period of time.

  The slug pesticide according to the present invention is a mixture of brewer's yeast as an attracting component and mesomil wettable powder as an insecticidal component, and the insecticidal component is 0.05 to 10 weight percent with respect to the attracting component. It is the greatest means of solving the problem.

The slug extermination method according to the present invention is characterized in that the slug extermination agent of claim 1 is formed in a dumpling shape having a diameter of 10 mm or more, and at least the surface layer portion is installed in a wet state.

  In the slug extermination agent according to the present invention, the mesomil wettable powder exhibits a rapid effect on slugs attracted by brewer's yeast that emits high odor, and can be surely killed on the spot. Further, according to the slug extermination method according to the present invention, the dumpling-like pesticide dissolves gradually, and the effect of releasing the attracting and insecticidal components over a long period of time is exhibited.

  The purpose of attracting slugs and being able to kill them on the spot and sustaining their effects over a long period of time was reasonably achieved as follows.

Sample A: 250 grams of brewer's yeast as an attracting ingredient, 0.2 grams of mesomil wettable powder (trade name: lannate) as an insecticidal ingredient is mixed in, and kneaded evenly with 200 CC of water. It is formed into a hard spherical shape.
Comparative sample B: 250 g of sake lees as an attracting ingredient, 0.2 g of mesomil wettable powder (trade name: lannate) as an insecticidal ingredient was mixed in, and kneaded evenly with 200 CC of water. Forms a hard sphere.
Comparative sample C: 250 grams of rice bran as an attracting ingredient, 0.2 grams of mesomil wettable powder (trade name: lannate) as an insecticidal ingredient is mixed in, and kneaded evenly with 200 CC of water. Forms a hard sphere.
Comparative Sample D: King Chemical's Methaldehyde-based Slug Pesticide (Product Name: Nametrin) Dry Granular Product

  Samples A to D were placed in a container having a diameter of 12 centimeters and a depth of 2 centimeters, and these were placed at intervals of 30 centimeters on a flower bed near a plantation that was frequently damaged by slugs.

  The first experimental observation was continued from July 28 to 30, 2005. The results were as shown in Table 1 below.

  In the first experiment, the observation on July 28 is the time when 10 hours have passed since the installation. There was rainfall from July 29 to July 30, and a significant difference was observed between Sample A and Comparative Sample D. This difference is that Sample A, Comparative Samples B and C were submerged as shown in FIG. 1, and the surface layer portion was dissolved together with it, and the attracting effect was improved, while Comparative Sample D was almost dissolved and disappeared. It is considered to be caused by this. The present sample A and comparative samples B and C were still in a solid state and could be used continuously after the experimental date.

When Sample A was compared with Comparative Samples B and C, a difference in the number of kills was observed between them. This was considered to be due to the difference in volatility under hot and humid climatic conditions, that is, the difference in attractiveness.

  The second experiment was carried out continuously from August 1 to 3, 2005. The sample A and the comparative samples B to D are the same as those used in the first experiment, and the installation conditions are the same as the previous time. However, since the sample A and the comparative samples B and C had good results at the time of rainfall, the sample A and the surface layers of the samples A to C were wetted and kept in this state. For this purpose, 100 CC of water 3 was put in the container 2 to make it immersed as shown in FIG. The observation results were as shown in Table 2 below.

In the second experiment, the observation on August 1 was taken when 6 hours passed after installation. The weather was good from August 1 to August 3, and Comparative Sample D was placed in a dry state. It was considered that the surface layer portion of Sample A and Comparative Samples B and C were gradually dissolved by water immersion, and the components spread in the container 2, thereby improving the attractiveness and insecticidal effect, leading to good results.

When Sample A was compared with Comparative Samples B and C, there was a difference in the number of kills between them, but this is considered to be due to the difference in attractive force as in the first experiment. Moreover, in the commercially available comparative sample D, the number of captures was small because some of them escaped without dying.

As described above, a mixture of brewer's yeast as an attracting component and mesomil wettable powder as an insecticidal component is formed into a dumpling as much as a ping-pong ball, and this is placed in a container and submerged to maintain a wet state. When used, it was able to exert a remarkable slug killing effect not found in other comparative samples.

The pesticide should be small in the sense that it can increase the surface area relative to the weight, but if it is about 10 mm in diameter, it can be used for several days without disappearing even in a flooded state, and it is easy to use. It became clear in the subsequent test results.

In one example, 250 grams of brewer's yeast as an attracting component was mixed with 0.2 grams of mesomil wettable powder as an insecticidal component, and the mixing ratio was 0.08 weight percent. The ratio is suitably 0.05 to 10 weight percent from the standpoint of efficacy and cost.

It is explanatory drawing which shows one Example of the slug extermination method which concerns on this invention.

Explanation of symbols

A Sample 2 Container 3 Water

Claims (2)

  A slug controlling agent characterized in that it is a mixture comprising beer yeast as an attracting component and mesomil wettable powder as an insecticidal component, and the above-mentioned insecticidal component is 0.05 to 10 weight percent with respect to the attracting component. A slug extermination method according to claim 1, wherein the slug extermination agent is formed in a dumpling shape having a diameter of 10 mm or more, and at least a surface layer portion of the pesticide is placed in a wet state.

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