JPS647739B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling pests on cereals by killing pest eggs attached to the cereals. Conventionally, fumigation treatment has been used to control pests on grains, but although this method is somewhat effective in controlling and killing larvae and adults, it does not actually kill pest eggs attached to grains. It was impossible. Therefore, it was inevitable that the eggs would hatch during the storage or distribution stage and would be damaged by pests. Furthermore, even if adults and larvae are killed by fumigation, if the carcasses remain, they become a source of damage from pests, so killing insects alone did not solve the problem. Therefore, a method for killing pest eggs attached to grains is desired, but the reality is that no method has been found to solve this problem without damaging the quality of grains. The present invention provides an innovative method for controlling insect pests of cereals that can solve this problem. That is, the present invention provides grains and oxygen scavenger compositions with Gurley air permeability (JIS
P8117) 200 to 100,000 seconds/100 ml of air sealed in a breathable packaging material and an oxygen absorber, sealed in a substantially non-breathable packaging material or airtight container, and heated to 5 to 20°C with an oxygen concentration of 0.1% or less. This is a method for controlling pests of grains, which is characterized by retaining the grains, killing pest eggs attached to the grains, and preventing them from hatching after opening. Grains include rice, wheat, millet, oats, buckwheat,
Examples include corn, millet, and sorghum. The term "cereals" here refers to those that have been harvested, dried, and threshed, or those that have been milled, but have not been subjected to heat processing such as steaming, frying, or roasting. The deoxidizer material used in the present invention is a deoxidizer composition sealed in a predetermined air-permeable packaging material. Oxygen scavenger compositions are solid compositions that absorb oxygen, such as iron, iron powder such as iron carbide, reducing inorganic salts such as sulfites and ferrous salts, hydroquinone, catechol, pyrogallol, and gallic acid. The main active ingredient is a reducing agent selected from the group consisting of polyphenols such as, for example, reducing sugars such as glucose, reducing polyhydric alcohols such as ascorbic acid, erythorbic acid, etc. I can give you something to do. Among them, those containing iron powder and an electrolyte, such as iron powder and metal halide, are preferred. In order to seal grains together with a deoxidizing material and kill pest eggs, it is necessary to maintain the grains at a temperature of 5 to 20°C with an oxygen concentration of 0.1% or less; at temperatures above 20°C, grains deteriorate due to fermentation, etc. The time required to kill grain pest eggs is 10 days or more in the case of brown elephant eggs, and a shorter period of time is required in the case of eggs of other grains. For example, the period of life for the brown bean weevil is 4 days or more, and the period for the adzuki bean weevil is 3 days or more. Therefore, it is preferable to keep the grains at 5 to 20°C for 10 days or more after sealing. The present invention completely kills pest eggs attached to grains, and does not simply prevent eggs from hatching in a sealed system. Therefore, according to the present invention, eggs will not hatch after opening the package. The present invention is a method for killing the eggs of grain pests, which was virtually impossible in the past, and completely eliminates the pests of grains, such as the Japanese wheat flour beetle, the Japanese black elephant, the Japanese snail beetle, the saw owl beetle, the Japanese snail beetle, the Japanese red snail beetle, and other various grain pests. can be prevented. In the present invention, grains do not require special treatment such as fumigation in advance, but of course, treatment such as fumigation can also be used in combination. Examples will be given and explained below. Example After raising 200 adult black elephants in 500 g of brown rice for one week, the adults were removed. 20g leftover brown rice
It was divided into portions and used for the following samples. 20g of brown rice sample and deoxidizing material [Gurley air permeability]
3000 seconds/100mlair, for 500ml of air, 4g]
It was placed in a KOP/PE bag (150 x 200 m/m) and sealed so that the air volume inside the bag was approximately 500 ml. same sample
Ten pieces were prepared and stored in a thermostat at 10°C. oxygen concentration
After storing it at 0.1% or less for 20 days, it was opened and placed in a room at 25°C, and the number of brown elephants that emerged from the sample brown rice was recorded. As a control, specimens were prepared under the same conditions except for the deoxidizing material, and the number of insects that emerged after opening was recorded, and this number was taken as 100%. The results are shown in the table below. 【table】

Claims (1)

[Scope of Claims] 1 Grain and oxygen scavenger composition determined by Gurley air permeability (JIS
P8117) 200 to 100,000 seconds/100 ml of air sealed in a breathable packaging material and an oxygen absorber, sealed in a substantially non-breathable packaging material or airtight container, and heated to 5 to 20°C with an oxygen concentration of 0.1% or less. A method for controlling pests of grains, which comprises retaining the eggs, killing pest eggs attached to the grains, and preventing them from hatching after opening.