[Explanation] "Pear blossoms and pale white willows are deep green, and catkins are full of flowers when they fly." As the weather gradually warms, Beijing has entered the first period of high incidence of willow catkins this weekend. The main catkin tree species is Populus tomentosa, and catkins continue to be high The time is about 5 days.
Citizens have expressed that they are affected by flying cats when they go out.
[Concurrent] Ms. Li
I just came to Beijing just a few days ago, and there were a lot of catkins in these two days. It's better to wear a mask when I go out.
[Concurrent] Mr. Ai
I feel that the symptoms of this allergy are more obvious now, that is, my eyes are red, and my throat is itchy, and I feel that it is still more affected by this (flying).
[Explanation] In order to reduce the impact of catkins on the lives of citizens, the gardening department focused on key areas and key periods, and carried out precise treatment of willow catkins through various measures such as precise positioning, spraying and cleaning.
[Concurrent] Zhang Bo, Senior Engineer, Science and Technology Division, Beijing Municipal Bureau of Landscaping
After we entered the first high-incidence period, what we did was to do everything we should do and sweep everything we should do. The main methods we adopted were high-pressure water spraying, cleaning and humidification. In addition to these several methods, we will Combined with this winter and spring pruning, we pruned about 310,000 female willows last year.
This year, we are also developing a data collection terminal for Beijing Feixu Prevention and Control. There are about dozens of professional personnel in the city that are gradually locating willow females.
For example, through this year, we can find out the growth status of the female plants and the flies of the female plants in the entire fifth ring.
[Explanation] Zhang Bo said that during the peak period of flying flocks, every day before the morning peak, the accumulated flocks of the previous day will be humidified and cleaned in time. Before the evening peak, the flocks will be humidified and cleaned again to reduce the impact of flying flocks on citizens' travel. influences.
[Concurrent] Zhang Bo, Senior Engineer, Science and Technology Division, Beijing Municipal Bureau of Landscaping
One characteristic of flying catkin is that as long as it encounters water, it will not fly anymore. Just like our marshmallows, it will disappear when it touches water.
For example, in some dense areas where the female plants of willow are concentrated, we use high-pressure water spraying to wash away some fruit flakes directly. After washing away under us for cleaning, it will no longer produce new flies. .
The second one also humidifies the surrounding environment of the tree body. Even if the flying flock meets the water, it will no longer fly.
[Commentary] Zhang Bo said that the second high incidence of willow catkins is expected to enter around the 25th and will last until around May 10.
Zhang Bo reminded citizens that they are advised to wear masks when they travel. Poplar catkins are flammable and burn quickly. Citizens are requested not to ignite poplar catkins at will
[Concurrent] Zhang Bo, Senior Engineer, Science and Technology Division, Beijing Municipal Bureau of Landscaping
From April 25th to May 10th, this is the second high-incidence period.
The main tree species of catkins in the second high-incidence period are the common Canadian poplars or Beijing poplars, as well as all the willows we see, including weeping willow and dry willow.
After all, Feixu has a relatively subtle structure, and it sometimes sucks into the nose or mouth when we are not paying attention, so I suggest that citizens wear masks as much as possible when traveling.
At the same time, there is a reminder that because the fly flock is relatively fluffy in structure and very flammable, we must not ignite the fly flock to prevent fire.
(Dong Zeyu and Yu Lixiao reporting from Beijing)
Editor in charge: [Wang Kai]