Where did all the insects go in winter?

Most insects have entered winter and are no longer active.

There are many kinds of insects, and their living habits are complex, and the insect state in winter is not exactly the same. There are more than 200 kinds of farmers. According to the overwintering state of forest insects, the results are as follows: 43% insects overwinter as larvae; 29% use pupae for winter; 17% spend the winter with adults; Eggs account for 1 1%.

There are many kinds of insects, and their living habits are complex, and the insect state in winter is not exactly the same. After classifying more than 200 kinds of common agricultural and forestry insects according to the overwintering insect state, the results are as follows: 43% insects overwinter as larvae; 29% use pupae for winter; 17% spend the winter with adults; Eggs account for 1 1%.

Extended data:

Temperature is the most important factor to determine the growth and development speed of insects. Climate warming can accelerate the development of insect state, leading to early emergence, migration and population peak. When the environment is too hot, terrestrial insects will look for cool and humid places. If exposed to the sun, it will put itself in the position with the smallest heated area on the body surface.

If the weather is too cold, insects will stay in the sun to keep warm. Many butterflies need to spread their wings to collect heat before flying. Moths flutter their wings or shake their bodies before flying, and form an air insulation layer around their bodies through hair or scales to keep warm. The most suitable muscle temperature for flight is 38 ~ 40℃ (100 ~ 104 ℉). In the severe cold, freezing is the greatest danger to insects.

Species that can survive the winter in cold regions are called cold-tolerant insects. Some insects can tolerate ice crystals in body fluids, but in this case, the cell contents may not freeze. But the cold tolerance of most insects means preventing freezing. The antifreeze effect is partly due to the accumulation of a large amount of glycerol as antifreeze; Partly because of physical changes in the blood, the temperature is far below freezing point, and it is still not frozen.

When insects spend the cold winter, no matter what development stage they are in, they must choose a safe and hidden place in advance to hide in order to enter a static wintering state. This overwintering phenomenon, like the seeds of mature plants stored in warehouses, has not stopped life. As long as the internal recovery conditions are met and the external conditions are suitable, it will start to move again.

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