The citizen talked about this year's cicada is particularly noisy!"It seems like taking a microphone, I want to bloom in life ..."

Cicada

The male cicada relies on abdominal tympanic membrane to vibrate. Cicada sounds can be transmitted 50 meters to 100 meters

Cicada "urine"

The liquid sprayed by the cicada is a tree juice in the body instead of urine, which is non -toxic.

In Wenping Villa, under the shade of the pots of the pot, the cicada "urine" was sprinkled on the ground, a wet area.

Cicada "Symphony" is being staged. With the rise of temperatures, recently, the frequent activities of cicadas and the sound of lits have aroused the attention of citizens. Some people think that cicada is a must -have element of summer, but some citizens are troubled by this little insect -they report to this newspaper through the 968820 hotline and the new media platform: Cicada sounds too noisy, affect their work rest; walk in Under the tree, a sudden attack will be "urine" ...

Summer cicada is the season with a limited season, or the noise of disturbing people's dreams? Is the liquid sprayed with urine, will they affect the vegetation and the human body? Yesterday, the reporter visited several dense locations in our city, and asked insect experts to interpret questions.

Cicada sounds can reach 74 decibels

Can reach noise level

Mr. Zhang, a citizen, lives near Luling Road, and the bedroom window is next to the crown. He said that after the weather turned hot, the cicada settled in the big tree in the night, "From 5 or 6 am to seven or eight in the evening, noisy people can't sleep well!" Some citizens teased on Weibo: Xiamen's cicada seemed to be on Weibo. Holding the microphone in your ear, "I want to bloom ..."

How big is the cicada? The reporter used mobile phone decibel tester to test under the trees near the Bank of China (Taiwan Street Sub -branch) and 83 Wenping Road and the cicada. The results showed that the average decibels of Luling Road cicadas were 74, and the average decibels of Wenping Road Cicada were 61. It is reported that the sound of 60 decibels is between the normal sound and noise, which is equivalent to the sound of people's loud noise and noise.

"Summer is the mating period of the cicada. The male cicadas must speak for puppets, and the sessions will be successful." Sheng Zhenjia, a senior engineer of the Diseases and Pest Division of the Green Center of Xiamen, said that the male cicada relies on the abdominal tympanic membrane to vibrate. The stronger the sound, the stronger the physique. The greater the attractiveness to the female cicada. In Xiamen, Chan Ming's "symphony" has continued until October. When the temperature at night is lower than 24 ° C, they generally do not call; the environmental light decreases, and its activity capacity will be reduced.

Cicada "urine" is like rain

A large area wet in the shade

At more than 9 am on July 12, the reporter came to the Sancha intersection near No. 83 Wenping Road. On the side of the sidewalk, there are four or five pots of pots of potting, and the cement floor under the shade of the tree is wet. Looking up, it turned out that a little "drizzle" fell from the tree.

Obviously it is a sunny day, where is the rain? Ms. Guo, a nearby shop, said that the water on the ground was cicadas "urine". If you look closely, you can find that some cicadas are flying between branches. Residents are accustomed to this, either pass through umbrellas, or avoid the shade.

Si Zhenjia said that the adults of cicadas mainly rely on the nutrients of the sap of the tree. After sucking tree juice, the cicada's body will become heavy. Once affected by the outside world, they have to quickly discharge the tree juice obtained in the body to reduce the "burden" and easy to fly. Therefore, the liquid sprayed on the tree is precisely speaking, the sauce of cicada is sucked into the body, not "urine", which is non -toxic.

【Explanation】

Is the number of cicadas increase?

There will be no great fluctuations

Some citizens report that no matter where they go, they can hear the cicada, and the voice is particularly loud. Is the number of cicadas this year? According to reports, Xiamen is more common and larger cicadas, mainly black cicada and 蟪蛄. Xie Qinming, a teacher and a doctor of insect ecology, told reporters that according to previous experience, the number of Xiamen cicadas will not fluctuate greatly. They will appear every summer and the activities are more regular.

Citizens feel that cicadas can be seen everywhere, on the one hand, because the cicada sounds can be transmitted by 50 meters to 100 meters; on the other hand, in recent years, communities and urban greening that have been giving up in recent years have become more, citizens and naturally have closer, and cicada sounds naturally naturally. Also near.

Is cicada sucking the juice, is it a pest?

Limited impact on trees

Xie Qinming said that most of the trees that cicadas like to inhabit are broad -leaved tree species, such as bitterness, cyan tree, poplars, etc., do not like coniferous forests such as pine trees, cypress trees, and single -leaf plants such as the king coconut and betel nut of palm family. Most of the trees of food are economic fruit forests, and the number and feeding amount of cicadas on each tree are limited, so the impact on trees is not great. "

Wu Zhenjia said that in garden plant management, cicadas are not advocated. For many years, I have not heard of the local cicada.

What do you think of cicadas to disturb the people?

A physical method can be used to reduce noise

Experts suggest that if citizens feel that cicadas are disturbed by the people, physical noise reduction measures can be taken, such as closing windows, air -conditioning or earplugs. Catch cicadas can be used to reduce the number of cicadas in the community appropriately.

Experts said that the cicada can be heard, indicating that the urban ecological environment is good. In theory, it is not recommended to make too many human intervention. "If we can't hear the cicada, it means that the surrounding ecological environment is so bad to a certain extent." Xing Zhenjia said.

(Text/Xiamen Daily Reporter Luo Zihong Intern Lai Jiawen Picture/Xiamen Daily reporter Lin Minghong)

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