A, physical control methods:

1, high temperature insecticide

Sunlight exposure: sunlight exposure is drying grain, mildew treatment of pests cost-effective method. Under normal circumstances, the temperature of about 50 ℃ for 2 to 4 hours, you can kill all the pests.

2, low-temperature insecticide

Warehouse ventilation and freezing: in the cold, dry winter, the warehouse doors and windows are open, the use of natural wind, ventilation, and at the same time to often turn the grain surface, in order to quickly reduce the grain temperature. If there are fans, fans can also be used jointly to accelerate the ventilation cooling effect. When the grain temperature drops to or near the outside temperature, you can stop ventilation, close the doors and windows, so that the grain continues to maintain a low temperature until the pests die.

3, windmill pests

In the grain and pests through the windmill, due to the specific gravity and shape of the different, under the action of the wind, the specific gravity of the light pests, dust and debris is blown to the wind to the farther away, than the large grain falls to the nearer to make the pests and grain separation, the use of the windmill pests, windmills should be controlled to control the rotational speed of the windmill and the flow of grain, so that it achieves the best separation effect.

Two, corn storage must pay attention to matters:

1, remove impurities

Corn harvest often contains more uncooked grains, broken grains and cob axle broken pieces and other impurities. Respiration, hygroscopicity, with more bacteria, smaller voids, easy to accumulate moisture and heat leading to heat mold and insect pests. So corn must be sifted after harvest to remove impurities, and then into storage.

2, dry moisture

The key to safe storage of corn is to improve the quality of storage, reduce grain moisture, therefore, storage must be controlled before moisture and temperature conditions. According to practice, corn water content of 12.5%, the temperature of about 35 ℃, generally safe storage. Corn harvest should be fully exposed to sunlight or drying treatment, storage should pay attention to ventilation and moisture, the newly harvested corn should be kept dry and low temperature conditions to ensure safety.

3, prevention and control of pests and diseases

Corn in storage, to diligently check, do a good job of mold and insects. When the corn warehouse produces a sweet smell, to turn the warehouse or drying in a timely manner. Spring warming before the implementation of the corn while cold pressure cover closed storage, to prevent moth pests have a better effect. The corn that has been infected with pests can be sifted, if the corn is winter frozen and spring sun sifted combined treatment, better insect prevention.

Extended information:

p>Farmers commonly used grain storage methods

1, conventional storage method

Conventional storage is the most common grain storage technology used by farmers, mainly including water, miscellaneous, storage during the moisture, mildew, insects, rodents and grain inspection and other links.

When the grain into the warehouse can be used to sun exposure to precipitation, wind Yang sieve in addition to impurities, so that the grain to achieve dry and clean; such as the discovery of pests is best to take the sun, high-temperature confinement, lack of oxygen and other physical methods of prevention and treatment of insects; farmers storage of rodent problem is more prominent, to maintain the storage of grain around the environment is clean, neat can be achieved effective rodent effect, but also with the grain silo around the placement of instruments to prevent and control rodent pests.

2, hot airtight storage method

The method is to use the summer high temperature exposure of wheat, grain temperature rises into the warehouse while hot, to achieve the effect of killing insects. Sunshine wheat should master the principle of late out of the early harvest, thin spread and turn over diligently.

3, natural anoxic storage method

Natural anoxic storage is the use of food, pests and microbial respiration in a closed environment, the consumption of oxygen in the environment, so that the pests are in a state of hypoxia and suffocation. Newly harvested grain respiration is vigorous, while the respiration of old grain is weak, therefore, the natural anoxic storage method is only applicable to the newly harvested grain.

The newly harvested grains should be dried and cleaned as soon as possible, and then closed within one week after harvesting. Natural anoxic storage requires strict airtight conditions, so we must use high airtight grain storage equipment, especially to ensure that the airtight in and out of the mouth of the grain, such as the discovery of poorly closed or damaged silo to be repaired in a timely manner.

Jiangxi Provincial Grain and Material Reserve Bureau - farmers grain storage common pest control;

Xinjiang party network - how to carry out corn storage