JPH0153021B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method for controlling pests of legumes. [Prior Art] Pest control is performed on legumes during the cultivation process by spraying chemicals, etc., but no particular pest control is performed after harvesting. Fumigation is sometimes used, but fumigation is insufficient and can only temporarily suppress insect activity or kill some of the insects. Furthermore, it was virtually impossible to kill pest eggs. Damage caused by pests on legumes must be controlled at the egg stage, because even if the adult insects are killed, if the carcasses remain, the legumes will lose their commercial value. Therefore, methods such as fumigation have not been able to substantially avoid damage caused by pests to legumes. For this reason, there is a desire for a method to completely kill the pest eggs laid on beans, but the reality is that no method has been found to achieve this goal without damaging the quality of the beans. [Problems to be Solved by the Invention] In view of these problems of the conventional techniques, an object of the present invention is to completely kill pest eggs and control pests without impairing the quality of legumes. [Means for Solving the Problems] A means for solving the above problems is to use a deoxidizing material in which beans are dried to a moisture content of 16% or less, and an oxygen absorbing composition is sealed in an air-permeable packaging material. The moisture permeability of the breathable packaging material is 25℃, RH difference
10 to 150 g/m ² 24hr at 75%, and a substantially non-breathable packaging material or airtight container together with a deoxidizing material that has an equilibrium RH of 50 to 90% when the deoxidizing material itself is sealed. This is to prevent pest eggs that have been laid on the beans. In the above solution, the legumes include, for example, soybeans, azuki beans, kidney beans, peas, cowpeas,
You can open fava beans, etc. In the above solutions, it is necessary to dry the beans to a moisture content of 16% or less to prevent fermentation. In addition, the water content is 16%
If the temperature is below, fermentation can be prevented even if stored above room temperature, and of course there is no need to dry beans with a moisture content of 16% or less before storage. In the above solutions, the oxygen scavenger composition is a solid composition that absorbs oxygen, such as iron, iron powder such as iron carbide, reducing inorganic salts such as sulfites and ferrous salts, hydroquinone, and catechol. , pyrogallol, polyphenols such as gallic acid, reducing sugars such as glucose, reducing polyhydric alcohols such as ascorbic acid or its salts, erythorbic acid or its salts, etc. Examples include those whose main active ingredient is a reducing agent selected from the group. Among them, those containing iron powder and an electrolyte, such as iron powder and metal halide, are preferred. The deoxidizing material in the above solution is a deoxidizer composition sealed with a breathable packaging material, and the breathable packaging material has a predetermined moisture permeability, and the deoxidizing material has a predetermined equilibrium RH. It is something. Moisture permeability is 10-150g/ ^m2・24hr at 25℃ and RH difference 75,
In particular, 20 to 70g/ ^m2・24hr is preferable, and equilibrium RH
The value when the deoxidizing material itself is sealed is 50 to 90.
%, especially 60-90% is preferred. The temperature at which beans are kept in sealed containers is usually 10-30℃.
However, in consideration of killing pest eggs and preventing quality deterioration of beans, a temperature of 10 to 20°C is preferable. [Examples] Example 1 200 adult bean weevils were placed in 500 g of adzuki beans (moisture 15%), and after spawning for 10 days, the parent insects were removed using a sieve. The remaining red beans were used as a sample for the next test. 100 adzuki beans were packed in ^a KOP/PE bag (150 ×200mm) and sealed. This was stored indoors at 25℃, and the oxygen concentration inside the bag was measured every day, and the bag was opened and the wings of the adzuki bean weevil eggs were removed.

[Table] Number of emergences: Number of insects emerging as adults after opening the package Mortality rate: (Number of emergences in control area 1 - Number of emergences in Example 1) ÷ Number of emergences in control area 1 x 100
The number of changes was recorded. For comparison, a sample was prepared under the same conditions except that no deoxidizing material was added, and was designated as control group 1. The results are shown in Table 1. Comparative Example 1 An oxygen absorber made by mixing the deoxidizing material in Example 1 with 0.5 g of iron powder, 0.5 g of sodium chloride, and calcium sulfate dihydrate and sealing the mixture in a packaging material with a moisture permeability of 50 g/m ² / 24 hours. The same test as in Example 1 was conducted except that the absorbent structure was used instead. The results are shown in Table 2.

[Table] Number of emergence: Number of insects emerging as adults after opening Mortality rate: (Number of emergence in control area 1 - Number of emergence in comparative example 1) ÷ Number of emergence in control area 1 x 100
[Specific Effects] According to the present invention, eggs of the adzuki bean weevil and other pests laid on various beans can be completely controlled. According to the present invention, beans do not require special insect repellent or insecticidal treatment such as fumigation, but of course treatments such as fumigation can also be used in combination.

Claims (1)

[Scope of Claims] 1. A deoxidizing material made by drying beans to a moisture content of 16% or less and sealing an oxygen absorbing composition in a breathable packaging material, wherein the breathable packaging material has a moisture permeability of 25°C and an RH difference.
10 to 150 g/m ² 24hr at 75%, and a substantially non-breathable packaging material or airtight container together with a deoxidizing material that has an equilibrium RH of 50 to 90% when the deoxidizing material itself is sealed. A method for controlling pests of beans, which comprises sealing the beans in a container and controlling pest eggs laid on the beans.