Is it a sign of sudden weather change that flying insects are flying all over Manchuria and it is dark?

The older generation often associates the abnormal behavior of nature with good luck and bad luck in the world. The large-scale appearance of aphids is not a precursor to disaster or sudden weather change. Aphids gather on a large scale in the local area almost every autumn, but there are no major natural disasters in the local area. Scientists already know that the reason why aphids appear in large numbers in autumn has nothing to do with natural disasters. Aphids are sensitive to the weather. They appear in groups, indicating that the local temperature is falling, but not necessarily suddenly.

If we have to link the emergence of aphids in groups with the sudden change of weather, I am afraid that aphids appear in groups, indicating that the weather is getting colder and colder, and we need to pay attention to increasing clothes. The ecliptic of the sun is 180 degrees. The autumnal equinox and the vernal equinox are the same. The sun shines almost directly on the equator, and day and night are almost equal. From this day on, the position of direct sunlight continued to move from the equator to the southern hemisphere, and the northern hemisphere began to have shorter days and longer nights.

According to China's autumnal equinox theory, this day is only half of 90 days in autumn, so it is called autumnal equinox. But astronomy stipulates that autumn in the northern hemisphere begins with the autumnal equinox. The ecliptic of the sun is 195 degrees. After the white dew, the weather turned cold and dew began to appear. When the cold dew comes, there will be more dew and the temperature will be low. Therefore, some people say that cold is dew, and it turns white first and then cold, indicating that the climate will gradually get cold. Water condenses into dew.

The weather turns cold and you have a good appetite. Pay attention to balanced nutrition. People with weak spleen and stomach can eat more foods that strengthen the spleen and replenish qi, such as sweet potato, millet porridge and pumpkin. Some cold things, such as yogurt, cold drinks, watermelons, etc., are recommended to eat less. Foods stored in the refrigerator, such as yogurt, should be kept at room temperature before drinking. In order to keep warm at night, you need to put on a summer quilt and close the window at night. Note that the open window should not face the head. Especially for the elderly and children, it is easy to catch cold in the middle of the night, leading to colds.