It is the rainy season now, sticky and wet.
There is also the rising temperature, which is very hot.
On a hot summer day, the familiar chirping of cicadas rang in my ears again. "Cicada" is an indispensable part of summer. Come and enter the world of "cicada" with Little Leaf today~
What is a cicada?
Cicadas, also known as cicadas and cicadas, belong to the family Cicadae of the order Hemiptera.
The life of a cicada can be divided into three stages: egg-nymph-adult.
The first stage is the eggs, which are usually laid in the branches of the new growth of the plant that year, and are as thin and long as rice grains;
The second stage is nymphs, usually called "cicada monkeys". At this time, they live underground, sucking the juice from the roots of plants when they are hungry, and lying in pits when they are tired;
The third stage is the adult. After the nymphs lie dormant in the soil for three to five years, they will dig holes in the ground near the roots of the plants, then climb up the trunks of the plants, find a safe position and begin to transform. This is what we often call "golden cicadas shedding their shells". After "shedding their shells" they become serious cicadas. They are the most common at this stage. Every summer they lie on the trunks of trees and scream at the top of their lungs.
Why do cicadas chirp?
In fact, cicadas sing to court mates. The cicadas that can chirp are male adults. Female cicadas cannot make sounds and are "dumb cicadas." The male cicadas chirp non-stop every day to lure the female cicadas to mate. However, although the chirping of cicadas is not caused by the weather, it is also related to the weather. If we hear cicadas singing loudly from the top of the tree early in the morning, it often means "the weather is very hot today."
Mate and reproduce
How do cicadas chirp?
The male cicada's articulator is at the base of the abdomen, like a large drum covered with a layer of tympanic membranes. The sharp and loud sound we hear is produced by the male cicada constantly vibrating the two tympanic membranes located on the abdomen at a frequency of hundreds of times per second. Yes, the "instrument" structure of the female cicada's abdomen is incomplete and cannot produce sound, so the female cicada cannot sing.
How long can a cicada live?
Cicadas are a long-lived species of the insect family. Most insects only have a life history of one year or less, but the average cicada has a life history of 3-9 years. Although cicada adults die soon after completing their mission of mating and laying eggs, with a lifespan of only about 2-3 months, cicada nymphs can grow underground for many years, and generally require five molts before they mature and break out of the ground. out. There is a seventeen-year-old cicada in North America. It needs to burrow in the soil for seventeen years before it emerges. It is one of the longest-lived insects known in the world.
Seventeen-year cicada
The dangers and prevention methods of cicadas
Common cicadas in Shanghai include black grasshoppers, Mongolian chilling cicadas, nymphs, and other cicadas. Cicada nymphs live in the soil all year round. They mainly cause damage by sucking the juice from plant roots with their mouthparts, affecting the growth of plants. Adults can also suck the juices from the roots of plants. The sap supplements nutrition, but the main harm is the egg-laying by female adults. The female adults use their sharp ovipositors to cut the cortex of the branches and lay eggs in them, which often causes the twigs to wither and affects the flowering and fruiting of cherry blossoms and other flowering shrubs.
Dangers of cicada laying eggs
Tips for Cicada Control
In order to reduce the harm caused by cicada sucking and egg-laying to garden plants, there are three commonly used control methods:
Prune off and intensively destroy branches containing insect eggs;
Artificial capture is carried out from June to August when the nymphs mature and crawl out of the trees on the ground at night to shed their shells;
Use insecticidal lamps and contact pesticides to control adult insects during the peak period of adult damage and egg-laying from July to August.
Manual capture
How delicious are cicadas?
Cicada slough (Zhiliao shell) is a kind of traditional Chinese medicine. Its main ingredients contain chitin and protein. It is an important traditional Chinese medicine with pungent and cooling properties. The cicada body (adult and nymph body) is also rich in nutrients, has a high protein content, and is higher in vitamins and various beneficial trace elements than ordinary meat. It is a veritable high-protein food. Interested friends can try it. (Mature nymphs taste best).
ps: Although it is delicious and tempting, please do not prey on wild cicadas as it will affect the ecological balance.
When the weather is hot, it will naturally cool down when your mind is calm,
You won’t be easily disturbed by the chirping of cicadas~
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