Where does the bubble of the bubble cicada come from? Why do cicadas foam?

If we open the foam, we will find that a small worm will be exposed inside, and the foam wrapped around its body is secreted by it.

This foam-secreting insect is called a foam cicada and is a member of the cicada family. Why do foam cicadas produce foam? It turns out that there are foam glands on both sides of the tail end of its body, which can secrete thin and viscous fluid; In addition, there are valves on both sides of the body of the foam cicada, which can emit gas; The liquid secreted by the foam gland is mixed with the gas emitted by the valve to form bubbles, which become more and more bubbles, and finally form a clump

The foam cicada often attaches itself to branches and grass stems, with its head facing down, and the bubbles blown out of its tail gradually spread downward, and finally envelop the body of the foam cicada, which is also a means of self-protection <> the foam cicada

It resembles a shrunken cicada. The eggs are laid on the branches and leaves of the host plant. Nymphs are flattened, broadly ovate, and often fed in clusters.

Some are covered with wax outside the species, and some form galls on the leaves. When insects are abundant, honeydew, a by-product of their digestion, forms a membrane on leaves and branches, sometimes dripping from the leaves like raindrops, and is often collected by Australian Aborigines for food.

In mid-May 2008, the conservation staff of Nanhu Park found that there were psylle sub-insect pests in the maintenance of trees.

Spray insecticide (systemic drug for easy plant absorption!) on the affected trees. The conservation company has been paying attention to this, but in subsequent observations, it has been found that psyllid larvae have emerged into adults and fly to other potted trees to lay eggs, thus forming a new round of damage to trees! In this regard, the maintenance personnel sprayed again with contact drugs to avoid a wider spread of pests!

2 3 days ago, the maintenance staff had sprayed a small watering can-related medicine, about 5 6 liters of potion, but due to the weather (rain) the effect was not good, and the expected effect of reducing pests was not achieved. On the morning of May 7th, there was also spraying with potion, because tree maintenance spraying needs to have a 7 to 10-day cycle, and in order to avoid the harm of drugs to trees and the human body, so these days can only be observed, can not be sprayed again! This kind of pest phenomenon has not been seriously affected on a large scale!

Pear psyllids are infested.

Psyllids have also had a catastrophic impact on citrus production, with as many as 100,000 huanglongbing-diseased citrus trees cut down in Guilin alone, causing huge losses to farmers. The only natural way of transmission of citrus huanglongbing is psyllids, as long as the psyllid is killed, the transmission route of huanglongbing can be blocked, so as to achieve the purpose of preventing and controlling huanglongbing. <>

The foam is secreted from the end of the belly of the cicada. It turned out that on the seventh and eighth segments of its abdomen, there were foam-secreting glands. The glands initially secrete a thin, sticky gelatinous fluid that combines with the gases expelled from the valves on both sides of the body to form many small bubbles.

These small bubbles cover the body first, gradually increase and eventually form a spittle-like foam.

On hot summer days, as you walk along mountain trails or streams, you will often find white spittle-like foam on grass stems and bushes. If you gently pluck the foam with a stick, you will see a milky white worm wriggling in the foam where it is clinging to the stem or twig. If you remove the foam from its back and wait quietly for a while, it will slowly grow foam on its back until it completely covers its body.

This small insect is called a cicada.

The foam is secreted from the end of the belly of the cicada. It turned out that on the seventh and eighth segments of its abdomen, there were foam-secreting glands. The glands initially secrete a thin, viscous gelatinous fluid that combines with the gases expelled from the valves on both sides of the body, like people blowing soap bubbles on wheat stalks, to form many small bubbles.

These small bubbles cover the body first, gradually increase and eventually form a spittle-like foam.

Foam is extremely beneficial for the survival of the cicada. The cicada usually lays its eggs in the stems of plants, and the newly hatched nymphs have no wings and limited ability to bounce, but they use the foam to live a comfortable life. It stabs its needle-like mouth into the grass stalk and leisurely sucks the sap of plants while evading predators.

The foam also plays a role in heat insulation, which not only keeps the cicada's ** moist, but also reduces the body temperature of the cicada, so that it can safely spend the hot summer. As the nymph grows in the body, the physiological functions in the body gradually change, and the ability to secrete foam gradually declines, and finally abandon the old foam and become a free adult worm.

There are many kinds of cicadas, also known as frog jumping insects, and their common characteristics: nymphs use foam stealth, suck plant juice, and become thieves of crops.

In summer, clumps of white foam can often be seen in the grass and trees, and when the foam is removed, a small insect is revealed inside, and the clump of foam wrapped around its body is secreted by it. There are foam glands on both sides of the tail end of the foam cicada's body, which can secrete a thin and sticky liquid; In addition, there are valves on both sides of the body of the foam cicada, which can emit gas; The liquid secreted by the foam gland is mixed with the gas emitted by the valve, forming bubbles, which become more and more bubbles, and finally form a clump. The foam cicada often attaches itself to branches and grass stems, and the bubbles "blown" from the tail gradually spread downward, and finally envelop the body of the foam cicada.

Froghopper is a family of hemiptera, and the common spittlebugs and small red-spotted spittlebugs are also known as spittlebug or cuckoo spit insect.