Many people may wonder:? There is so much rice in the rice shop, why isn't there a Mi Chong? But if you put a little rice at home, Mi Chong will appear out of thin air after a long time. What is the reason for this?

Oryza glutinosa (adult black beetle)

Before we know why rice shops don't breed Mi Chong, let's learn what Mi Chong is.

Mi Chong, also known as rice weevil, belongs to COLEOPTERA, a completely abnormal insect, which means that they go through four stages in their life: egg-nymph-pupa-adult. Generally speaking, the black Mi Chong we see is its adult, while the white meat worm is a nymph.

The reproductive cycle of rice weevil is particularly fast, especially at high temperature, and the reproductive speed is the fastest. In the wild, adults will fly to the farmland and lay eggs in the ears of wheat or rice. In order to protect eggs, adults will eat wheat or rice grains to form ovaries.

After laying eggs in wheat or rice grains, adults will secrete mucus and seal the entrance. From the appearance, it is almost impossible to tell which rice grains contain eggs.

After 7- 16 days of development, eggs will form nymphs and like to eat rice grains. Nymphs emerge into pupae after 30 days of development, and pupae degenerate into adults after 7- 10 days of development.

Adults like high temperature and humidity, and have strong reproductive ability, and can lay about 500 eggs at a time. When we find insects in rice, we usually see adults. At this time, people like to bask in the sun, but it won't kill Mi Chong.

This is because Mi Chong likes high temperature very much, but it can survive better in high temperature environment. Moreover, if adults are found in rice, there must be a large number of eggs in rice at this time, and the eggs can hatch faster after high temperature irradiation.

From this point of view, reducing the water content of rice by air drying and reducing their population can not be completely killed.

If you want to kill Mi Chong completely, you can store the rice in the refrigerator. This is because Mi Chong can't stand the low temperature. If it is lower than 15℃, it is suspended animation. If it is lower than 5℃, it only takes 2 1 day for them to die.

Why is there no worm in the rice in Midian?

In fact, it is because the rice in the rice shop changes faster. For many businesses, what matters is not how many goods can be sold, but how fast the goods can be turned around.

If the goods bought by the rice shop owner at the beginning of the month need to be sold at the end of the month, it is very uneconomical for the rice shop owner, because the goods piled up in the warehouse will not only occupy the inventory cost, but also the loss cost and the liquidity cost of funds. For example, save the money from hoarding goods and develop a second store.

Therefore, the general rice shop owner will not buy a lot of rice, but realize profit through the rapid turnover of goods. As we know, the hatching speed in Mi Chong is very fast, but it takes 7- 16 days for eggs to hatch nymphs, and many rice shop owners will sell their goods before 7- 16 days, so there are few rice in rice shops in Mi Chong.

The same is true of other shops. For example, although the catering industry consumes a lot of rice every day, they don't hoard a lot of rice, so we rarely find insect-eaten rice in the catering industry (doesn't mean there isn't).

What if there is Mi Chong in the rice?

If you like to buy a lot of rice at a time, you'd better dry the rice before buying it and put it in a dry and ventilated environment. Because Mi Chong likes the environment with high temperature and humidity, and the dry rice environment is not conducive to the survival of Mi Chong.

If there is a lot of rice at home, you can buy sealed barrels, store the rice to be used in the near future separately, reduce the number of times to open the sealed barrels, and realize the dry environment of rice.

Of course, we can see from the rice preservation strategy of Midian that hoarding grain is the reason why rice is easy to breed in Mi Chong. Therefore, the most important thing for families to store rice is to buy it in small quantities and many times, so as to reduce the occurrence of Mi Chong.

If you have a lot of Mi Chong at home, it is not recommended to eat it. You can feed birds or birds such as chickens, ducks and geese.

abstract

Mi Chong is one of the most serious pests to China's grain, and Mi Chong in the south is mostly in the north, because the temperature and humidity in the south are warmer and more suitable for the growth of Mi Chong.

The best way to deal with Mi Chong is to reduce the accumulation of grain, moreover, it can be kept in the refrigerator at low temperature.