There are actually two situations when insects stop growing and developing: one is dormancy, which is often directly caused by adverse environmental conditions. As the temperature drops, a series of physiological changes will occur in the insects, such as the accumulation of stored substances such as fat and sugar in the body, the reduction of water content, slow breathing, changes in behavior, etc. If the adverse conditions are removed, growth and development can be restored. For example, in autumn and winter in temperate or cold temperate areas, the temperature drops and food becomes scarce, so some insects enter a dormant state. Some insects hibernate in specific insect states, while others can hibernate in any insect state. If these insects are raised under conditions of suitable temperature and humidity and given sufficient food, they can reproduce all year round.
Another situation is diapause. Diapause is often not directly caused by adverse environmental conditions, but the insect itself has a certain degree of genetic stability. When an insect enters diapause, it cannot resume growth immediately even if it is given optimal conditions. development. Diapause generally has a fixed insect state. According to research, changes in photoperiod are the main factors that cause diapause. Generally, insects that diapause in winter use short days as information to cause diapause. Usually, if the photoperiod is longer than 12-16 hours, they can continue to develop without diapause. , such insects belong to the short-day diapause type. Some insects that enter diapause in summer use long daylight as diapause information. Generally, if the photoperiod is less than 12 hours, they can continue to develop without entering diapause. Such insects belong to the long-day diapause type.
In addition, there are some insects that belong to the intermediate type, which can cause diapause when the photoperiod is too short or too long, and will not diapause only within a very narrow photoperiod range. The insect state in which insects feel the photoperiod is often the previous state of the diapausing insect state. For example, the corn borer diapauses as mature larvae, and its critical light state is the third and fourth instar larvae. How to relieve diapause? It is very simple. When the insect undergoes diapause metabolism for a period of time, it can automatically relieve diapause.
In fact, photoperiod, temperature and humidity are external factors of diapause; hormones are internal factors that cause and resolve diapause. The nutrients and water content in food also affect diapause of insects. For the same insect, if the nutrition is good, there will be very few diapause individuals, but if the nutrition is poor, most diapause will occur. At the same time, the same kind of food has different water content, which also affects the change of diapause phenomenon.
animal tags：
you may also like
The green butterfly is one of many people's favorite arthropods and has attracted much attention due to its beautiful appearance and rich species. Here is a detailed introduction to some common green butterfly species:Graphium agamemnon:The God's Nymph is a common green butterfly with distin...
Insects "sleep" all winter. How and when do they wake up in spring? You may think that insects will wake up naturally when the weather warms up. It seems that temperature is the most important condition. In fact, it is not that simple. (1) Drink enough water before waking...
Aphids are also called grub bugs, morning bugs, honey bugs, ant bugs, etc. Although their bodies are small, they can cause great harm to plants. Among them, except for the gall aphid, which is a beneficial insect, the rest can be said to be devastating pests. There are almost no roots, stems,...
For some species of butterflies, the color patterns of male butterflies are similar, but the female butterflies are very varied and very different. For example, some have tail protrusions, some have no tail protrusions, and there are many different color patterns and shapes. The Papilion butt...
There are countless place names in the world, large and small, and the creation, naming and changes of place names each have their own rich content and profound meanings. Many place names are derived from the unique local natural features, economic characteristics, traditional national cultur...
Ants and termites are sometimes mistaken for each other, but they are very different groups of insects. Several key features help identify them correctly...
Bee siege In the 11th century, when King Richard I of England led an army to attack the ancient city of Jerusalem, Gendak, he encountered desperate resistance from the defenders. Due to the high and steep walls of the city, the defenders were condescending and used musket...
Rice weevil, also known as rice weevil, mainly damages rice and can also cause losses in some areas. Adults are dark brown to black, densely covered with grayish-yellow to yellowish-brown hairs. The beak is slender and slightly curved downward. There are many small engraved spots on the pronotum, an...
Email: jsset#163.com (change # to @) Please indicate your purpose of visit! Guangdong ICP No. 2022053326 XML| map| Chinese
