JPH0152361B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a control body that continuously releases pheromones, which are physiologically active substances for insects. Originally, insect pheromones are substances that mediate communication between insects, so many of them are chemically unstable. In particular, aldehyde-based pheromones have aldehyde groups that are easily affected by light and oxygen. This tendency is strong because of the fact that For this reason, methods are being considered in which acetate or other compounds with partially different chemical structures are used instead as stable pheromone-like active compounds. However, this method has the problem that physiological activity is weakened, and a large amount of pheromone is required to obtain the desired effect. Therefore, an object of the present invention is to provide a controlled release material that gradually releases unstable aldehyde pheromone without decomposing or modifying it. For this purpose, a solvent consisting of an aldehyde pheromone, a non-volatile substance, an antioxidant, and 2-sodium ethylenediaminetetraacetate (EDTA2Na) was used.
This can be achieved by sealing a mixture of pheromone and pheromone in a plastic container having pheromone permeability. According to the aldehyde-based pheromone release control body of the present invention, the aldehyde-based pheromone is not decomposed or modified under the conditions of use, and moreover, the pheromone is stably and continuously released for a certain period of time. The aldehyde pheromone used in the present invention is Z-11, which is a sex-attracting pheromone for the Japanese porcupine moth.
-hexadecenal, Z-13-octadecenal, etc. Other examples include hualanal, which is a guidepost pheromone for ants, trochodermal, which is a pheromone for cutworms, and trogodermal, a pheromone for Kuhapra beetles. As the solvent, a non-vaporizable substance that coats and protects the aldehyde pheromone is used, which is selected from liquid paraffin, alcohols, animal oils, etc., and preferably a non-vaporizable substance such as liquid paraffin. Antioxidants include cysteine, sodium ascorbic acid, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), sodium thiosulfate, nor-dihydroguaiarecic acid,
Examples include sodium sulfite and tocopherol, but oil-soluble ones are preferred. A mixture consisting of these aldehyde-based pheromone, a solvent, an antioxidant, and 2-sodium ethylenediaminetetraacetate (EDTA2Na) is sealed in a plastic container having pheromone permeability as described below, and the controlled release body of the present invention is used. It consists of The 2-sodium ethylenediaminetetraacetate (EDTA2Na) usefully prevents trace metals contained in these systems from acting as a catalyst when the aldehyde groups of aldehyde pheromone are polymerized under the influence of light. Therefore, it functions to suppress the decomposition or modification of the pheromone. The mixture usually contains 100 parts by weight of the solvent,
An antioxidant and 2-sodium ethylenediaminetetraacetate (EDTA2Na) are blended in an amount of 0.05 to 5 parts by weight, respectively, and an aldehyde pheromone is blended in an amount of 1 to 20 parts by weight. When blending, it is necessary to blow inert gas in a conventional manner and replace it with oxygen gas. The mixture thus prepared is sealed in a plastic container having pheromone permeability.
The thickness of the container varies depending on the pheromone permeability of the plastic and the desired amount of release, but is generally preferably from 10 to 2000 .mu.m. The shape of the container body may be tube-like, bag-like, or irregularly shaped, and it is preferable that the inside of the container body is filled with an inert gas. Plastics used to form containers include:
polyethylene, polypropylene, polyester,
polyamide, polyurethane, polyacrylate,
Examples include polyvinyl chloride, polyvinylidene chloride, and ethylene copolymers, which may be colored to have light-blocking properties. The fact that the aldehyde-based pheromone release controller of the present invention releases pheromone over a long period of time is demonstrated by the following examples. Example 1 Inert gas was blown into 9.9 g of a liquid containing liquid paraffin containing thioglycerol, tocopherol and EDTA2Na in the amounts shown in Table 1 for about 10 minutes through a glass capillary, and then 0.1 g of Z-11-
Hexadecenal is added to prepare a mixture, which is filled into a cross-linked polyethylene tube with an inner diameter of 3 mm and a wall thickness of 100 μm, which is heat-sealed at intervals of 50 mm to obtain the aldehyde-based pheromone release control body of the present invention. Example 2 BHA, BIT and EDTA2Na in the amounts shown in Table 1
Polyethylene glycol (Great
Blow inert gas into 9.5 g of liquid containing Z-11 (600) for about 10 minutes through a glass capillary, and blow to release 0.5 g of Z-11.
- Add hexadecenal to make a mixture, which is placed in a 4 cm x 5 cm square bag with one wall made of aluminum foil laminated polyethylene film and the other wall made of polypropylene film.
Inject 0.5g and seal to obtain the controlled release body of the present invention. Measurement method in Table 1: Hang the sample in a sunny place in a greenhouse controlled at 25℃.
The amount of vaporization is measured every specified number of days by weight loss.

[Table] The compounding unit of the antioxidant and 2-sodium ethylenediaminetetraacetate (EDTA2Na) in Table 1 is g (gram). As is clear from Table 1, samples Nos. 1 to 14 contain more antioxidant and ethylenediaminetetraacetic acid than samples Nos. 1, 14, 2 to 4, and 7 to 9.
−Sample with acid combination of sodium (EDTA2Na)
Samples Nos. 5, 6, and 10 to 13 are notable for the fact that sufficient aldehyde pheromone release is observed even on the 40th day.

Claims (1)

[Scope of Claims] 1. A mixture of an aldehyde pheromone, an antioxidant, a solvent consisting of a non-vaporizable substance, and 2-sodium ethylenediaminetetraacetate is sealed in a plastic container having pheromone permeability. An aldehyde-based pheromone release control substance. 2. Claim 1, wherein the aldehyde pheromone is at least one selected from the group of Z-11-hexadecenal and Z-13-octadecenal.
The aldehyde-based pheromone release control body described in 2.