Why is it always sticky under some trees? Where does the glue come from?
2024-08-08
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Recently, many citizens have found that there is a sticky mucus on the cars parked on the roadside and on the ground. Not only are the cars sticky, but even white shoes will be stained yellow after walking on them, which is difficult to clean. Gardening experts said,This mucus is mainly honeydew produced by aphids. Aphids can be found on trees such as Sophora japonica, pine, and Koelreuteria paniculata. If you are contaminated with honeydew, you should clean it up in time.
On the north side of Fuchengmenwai Street, petals from the locust trees fell onto the sidewalks and parked cars. Many cars on the roadside were covered with layers of petals. One car had been parked for a long time, and the previous rains did not wash away the petals, but soaked the locust flowers, forming clumps of black jelly on the car. It felt very sticky to the touch, and the original white color of the roof was almost invisible.
Dr. Zhao Shiwei of the Beijing Academy of Landscape Architecture said that the jelly substance that citizens are talking about is mainly honeydew secreted by aphids, and the actual gum secreted by trees is very small. Well-fed aphids will produce a large amount of honeydew, which will accumulate to a certain extent and then drip in the form of water drops. "The main components of honeydew are glucose, sucrose, etc., which is why citizens feel sticky." Zhao Shiwei said. Relevant staff of the Bureau of Landscape Architecture said that in addition to Sophora japonica, aphids are also found on pine trees, Koelreuteria paniculata and other street trees.
"If white shoes step on this honeydew, they will turn yellow and become difficult to clean over time." Employees at a shoe cleaning store said that citizens can try to bleach their shoes at home using diluted 84 disinfectant. If the effect is not ideal, they can send them to a shoe cleaning store for cleaning.
Staff at several 4S stores in Beijing International Automobile Trade Service Park said that once the car body is stained with this kind of sticky substance, it should be cleaned as soon as possible. Timely cleaning does not require special detergents, but if it is too long, it may corrode the car paint and require waxing and polishing. The staff suggested thatCitizens should try to avoid parking under trees when parking. If they park under a tree, they can cover the vehicle with a car cover.
Fuchengmenwai Street
