#19th Agricultural Fair #Cicada is a common insect in the countryside, especially in summer, which is the season when cicadas are most active. There are many common names of cicadas, in different regions, different ethnic groups, different dialect areas, its name is different, the general name is known, known monkey, tree know, tree monkey, autumn know, summer tree monkey, silkworm and so on.
How do insects live in nature and on what do they live for food? So, what are the benefits and disadvantages of cicadas to nature? Are cicadas beneficial or pests?
To understand whether cicadas are beneficial insects or pests, it is mainly necessary to see whether cicadas are beneficial or harmful to humans, and then we can determine whether cicadas are beneficial insects or pests. First, let's understand the growth and development of cicadas and the life process.
Cicadas are divided into three growth and development links: eggs, larvae and adults. Insects generally rise after the spring sting festival every year, and insects begin to recover from hibernation and move in nature. The cicadas overwintered from the soil, and because of the increase in soil temperature, they recovered, burrowed out of the soil hole, climbed onto the young branches of the big tree, and nibbled the sap in the cortex of the branches as nutrients to survive.
Therefore, when a cicada climbs onto a young branch, it stays for a few days, or even longer, nibbles on the young branch cortex, absorbs the juice of the cortex, greatly reduces the nutrients on the branch, and the young part of the cortex is eaten. After the large cortex on the branches is eaten, a large area of scars appears, and at high temperatures, the moisture of the branches is transpired and lost seriously, making the branches easy to wither and die.
In addition, when the branches are eaten by the cicadas on the cortex, the harmful germs carried by the cicadas from the soil are transmitted to the wounds of the branches, causing the branches to fall ill and die. Cicadas are particularly fond of harming the branches of fruit trees in orchards, because the branches of trees that grow naturally in nature are not as nutritious and sap-rich as the branches in orchards. Fruit trees are artificial topdressing, which can deliver sufficient nutrients to the branches, and the naturally growing branches of trees have less nutrients.
Therefore, the main hazard of cicadas is the fruit branches in the orchard. Therefore, the fruit of the fruit tree depends on the thick and nutrient-rich branches to bear fruit. Due to the nibbling of cicadas, the nutrients of the branches are reduced, and even the wilting and death of the branches is caused, which seriously affects the yield of the fruit.
At the same time, laying eggs on the branches, hatching into antworms in a suitable environment, falling to the ground, slowly burrowing into the soil, looking for the young root system of the crop, nibbling and absorbing nutrients, they begin to drill holes in the root system of the fruit tree, relying on the nutrition of the root of the fruit tree to provide food for it.
When the larvae reach a certain point, they emerge from the soil and denature into adults, becoming cicadas. The cicadas then begin to harm the branches of fruit trees.
When the temperature drops below 15 °C in autumn, it makes a hole in the soil under the fruit tree to escape the cold, and then goes into hibernation.
The harm of cicadas to humans in the summer is noise. Cicadas are used to chirping, this noise, due to the large number of cicadas, every moment in the non-stop chirping, seriously affect people's daily life.
In addition, every time the cicada passes the age, it has to shed a layer of outer cortex, and the cicada grows once. The cortex shed by cicadas, called cicadas, is a chinese medicinal herb.
The inside of the cicada's body is very rich in protein and unsaturated fatty acids, as well as rich in trace minerals. Therefore, cicadas are a high-protein and high-nutrient human delicacy.
All in all, cicadas, whether larvae or adult, are the most harmful to fruit trees, affecting the yield of fruits and are a pest. Because it is an insect with high nutritional value, people catch it and eat it, turn harm into benefit, so it becomes a beneficial insect for humans. In order to improve the yield of fruit trees, by preying on cicadas in large quantities, the harm of cicadas to fruit trees can be reduced and the yield of fruits can be improved.
[The above is my point of view, if there is something inappropriate, please leave your valuable comments in the message area, and actively participate in the comments, specially invite everyone to pay attention to the three rural areas in eastern Hubei, discuss the three rural issues together, picture source network, infringement and deletion. 】