In the past two days, the Hangzhou Municipal Bureau of Gardens and Culture has received feedback from the public that there are fluttering hairs, and white flocculent hairs are floating on both sides of the road. Is Hangzhou's willows making a comeback? What the hell is going on? Let's take a look.
There are white flocculents on the side of the road, is it flying wool?
The Municipal Bureau of Parks and Culture did the suppression of willow willow as early as May last year, and from the overall observation, this year, both the suppression of willow willow has achieved very good results, and there are fewer flutters!
Plane wool data chart
But apart from the female willow trees that produce flying feathers, what other tree species? In Hangzhou, there are only three species of trees that produce fluttering trees, plane trees, female willow trees and poplar trees. Every year, the sycamore fly feathers start as early as possible, generally starting in March, but this year after effective fruit control pruning, the plane tree fly feathers have been greatly controlled, and the fly feathers have been reduced.
Female willow flocculent data map
After that, around March and April, the flying feathers of the female willow trees will also come. But in our Hangzhou, the suppression work of willow flying feathers can be said to be very mature, from the promotion and application of 2018 so far, the success rate of willow flying feather suppression has reached more than 95%, and the scene of "April flying snow" in the urban area is almost invisible!
Finally, there are poplar trees that appear in April and May, and like willow trees, they wear woolly seeds to look around for a place to breed and shelter, and follow the wind to stage a scene of snow. But it has to be mentioned that poplar trees are good tree species for wind protection, which are planted in the northern region, and can be seen on the Hangzhou Expressway and suburbs, but there are not many in the urban area. In Yuhang District, there are also some poplar trees planted in the early years, some are used as background trees in the configuration, and more are used as shelter forests on both sides of the highway. If you see Fei Fu at this time, it should be Yang Shu.
Since poplar trees are rare in urban areas, what are the white hairs of the Chaowang Branch Road in the Ninth District of Chaohui? Will it be like the internet rumors, white flocculent hair is a flying elm four-veined cotton aphid?
Make no mistake, the truth is here
After the on-site inspection of experts from the Municipal Landscaping Development Center, there are twelve Green Trees in chaowang branch road in the ninth district of Zhaohui, but there are no poplar trees, and the answer is revealed, the original white "wool" is not the wool of poplar and willow, but the evidence left by the green paulownia lice - white waxy secretion, and the natural white wool is a flying elm four-veined cotton aphid that does not exist.
Zhaohui 9 district green paulownia lice scene
Garden experts said that the wood lice is the main pest of the green tree, its overwintering eggs will generally begin to hatch around the end of April to the beginning of May, these so-called "white hairs" are actually the evidence left by the wood lice insect infestation harm to the green tree. Experts from the Municipal Landscaping Development Center said that the probability of wood lice infestation in Hangzhou is very small, because the number of green trees in Hangzhou is not much, and the maximum number of trees in the city is only two or three hundred. And the control method of green paulownia is very simple, with conventional drugs such as imidacloprid permethrin.
Can the elm four-veined aphid really fly? What the hell is this awkward thing? In this regard, the Municipal Bureau of Gardens and Culture also gave a response at the first time: Yusi-veined cotton aphid is an aphid insect infestation in the plant kingdom, similar cotton aphids in Hangzhou mainly have Park Mian aphids, Yusi-veined cotton aphids (also known as Autumn Four-veined Cotton Aphids), etc., such aphids will secrete a layer of furry secretions, it looks like there are white hairs, but their mobility is very weak, will not fly long distances. After the scientific management of the city's public green space by the garden department and the early prevention of diseases and insect pests, there are few cotton aphids in Hangzhou, and a large number of transmission is impossible, so everyone does not have to worry.
Regarding the Qingtong on Chaowang Branch Road in The Ninth District of Zhaohui, although it is said that the street is managed by the local street, since the wood lice infestation has affected the lives of the surrounding citizens, the greening department will still use professionalism and technology to solve this problem. After counting the scene one by one, there are 12 green trees in the Chaowang Branch Road. The Xiacheng District Landscaping Development Center has inspected the situation with the experts of the Municipal Landscaping Development Center, and formulated a drug treatment plan, and just this evening the first treatment was carried out.
It is also a reminder that citizens who are more sensitive to flying feathers, such as passing through the suburbs, highways or places where poplar trees are planted in recent days, should also pay attention to wearing masks and doing personal protection.
Source Hangzhou Release
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