One scene丨 Why are there so many caterpillars this year? Beijing Municipal Bureau of Landscaping: Disappears by the end of October at the latest

"The insect plague in our community is terrible, and in previous years there really wasn't so much..." A citizen couldn't help but complain online. Beiqing-Beijing headline reporters investigated and reported that this alien species called the American white moth appeared in Chaoyang, Fengtai, Xicheng and other districts of Beijing. The staff of the Beijing Municipal Landscaping Bureau said that frequent rainfall led to the outbreak of insect infestation, and after the citizens found out, they could immediately contact the community property, neighborhood committee, street office and garden department to carry out disinfection treatment.

Caterpillar infestation Residents had to walk around under trees as they passed

"Haidian District Sidaokou No. 9 courtyard caterpillar infestation, all climbed into the first floor! The car is also on the car, and the courier cabinet is also on it. ”

"There's a big plane tree underneath the studio building, the leaves are eaten clean, the tree is full of caterpillars, and I walk around every day."

"I sat downstairs in the neighborhood for a while and found that two or three caterpillars had fallen from my body, which was very disgusting." Mr. Hei, a citizen, told the Beiqing-Beijing headline reporter that he did not know whether the bug was poisonous or not, and he felt that he was in his heart after falling on his body.

Ms. Wang, who works in Nancaiyuan Street in Xicheng District, broke the news that a large number of caterpillars appeared on the green trees on both sides of the road of Nancaiyuan Street, and some of the leaves were eaten into a net, and the bugs would fall on the ground and sidewalks from time to time.

Mr. Feng, who parked under the tree in Guang'anmen in Xicheng District, couldn't help but send a WeChat circle of friends to "expose" these caterpillars, and soon got a lot of people to leave messages, and everyone said their distress about caterpillars.

In response to the flood of caterpillars, from September 12 to 22, after receiving feedback from residents, Beiqing-Beijing headline reporters visited Yimin Lane in Xicheng District, Maohua UHn International Village near XibaHe in Chaoyang District, and Happy Home Community in Dongcheng, Beijing.

In Yimin Lane, caterpillars nibbled the leaves of three ailanthus trees, and the ground of the community fell everywhere, and vehicles and fitness equipment were occupied by caterpillars. In the densest part of the French sycamore in Maohua UHn International Village, a tree can photograph hundreds of caterpillars from its roots to a height of less than one meter above the ground. The insect plague in the Happy Home community is also not optimistic.

Caterpillar flooding has been found in the Meiran Power Block of Dingfuzhuang in Chaoyang District, near the parking lot of Guang'anmennei Street in Xicheng District, on the large trees on the side of Tuanjie Lake Road in Chaoyang District, and in the Bauhinia Garden Community of Wuyi Garden in Tongzhou.

Beiqing-Beijing headline reporters visited the community property and residents and learned that a large number of bugs are American white moth larvae, caused by more rain.

After receiving feedback from residents, the property has sent people to spray to kill, and the American white moth larvae that were killed in the community fell everywhere. At present, the Beijing Municipal Bureau of Landscaping and Landscaping has carried out prevention and control deployment of harmful organisms such as the American white moth, and issued the "Beijing Main Forestry Pest Control Technology Program in Autumn and Winter". In Changping and Haidian and other places, the use of Zhou's small bees, Guan's swollen leg bees, and aircraft sprays have been used to kill American white moths and other harmful organisms.

Frequent rainfall causes bug infestation As the temperature drops, it gradually decreases

It is understood that the American white moth is native to North America, mainly distributed in the United States and southern Canada, is an international quarantine pest, strong adaptability to the environment, large reproduction, a large number of hosts, a wide range of transmission routes, great harm, seriously affecting the growth of flowers, vegetables, crops, garden trees and other plants, known as the "demon" of the plant kingdom.

After decades of invasion, the American white moth has been widely distributed in many countries in Europe and Asia. It prefers to eat mulberry trees, French plane trees, elm trees, persimmon trees, cherry blossoms, poplar trees, paulownia, ash, ailanthus trees, acacia trees, framing trees, willow trees and other tree species. When the disaster is severe, the leaves of the trees are often eaten up.

Zhang Lei, a staff member of the Forest Protection Department of the Chaoyang District Landscaping Supervision and Management Service Center, said in an interview with the media that since 2006, the American white moth insect pest has always occurred in Chaoyang District, and this year because of the recent frequent rainfall, it has a great impact on insect pest control. The abundant rain in Beijing has created a high temperature and high humidity environment, which is particularly conducive to the breeding of American white moths, so the number has surged this year. ”

Zhang Lei introduced that for this kind of insect pest, the public should not be too panicked, the American white moth does not sting or bite people, the insect body itself is also non-toxic, but a pest that causes harm to the garden landscape. "If a bug does fall on your body, don't touch it with your hands, just get rid of it."

Mr. Chen, a staff member of the Beijing Municipal Bureau of Landscaping, said that this American white moth larvae is an invasive alien species, extremely fertile, and eats leaves for a living, generally appearing in summer and autumn. The method of treatment is also relatively simple, just enough to spray the medicine to kill.

"Since the beginning of this year, affected by climatic factors and other factors, the American white moth has increased significantly compared with last year, and Beijing has shown serious generational overlap and local outbreak hazard characteristics, and it is currently in the third generation of American white moth young larvae hazard period, individual residential communities have a strong reaction, and there is a risk of disaster and disturbance in abandoned nurseries at the junction of urban and rural areas." Mr. Chen said that the Prevention and Quarantine Department of the Landscaping Bureau has monitored that the breeding of white moths in the United States is too fast, and the Resource Conservation Center has made a city-wide deployment, and the killing arrangement has been deployed to various districts.

As for why the killing work has been deployed, why there will still be a flood of White Moths in the United States, Mr. Chen, a staff member of the Beijing Municipal Bureau of Landscaping, said that due to the large amount of rain this year, the sprayed insecticides may have been diluted by the concentration of rainwater, so the efficacy of the insecticide has been weakened, "it can only be suppressed through continuous and repeated killing of white moths in the United States, but this situation will not last long." Around the end of October, as the temperature drops and the rainfall decreases, the bugs die naturally and cease to breed. ”

Mr. Chen also said that if the public encounters the phenomenon of caterpillar infestation again, they can find properties, communities and streets in the community to report, and if they encounter this situation on the road, they can reflect it to the territorial garden department.

Intern Yin Hang

Text/Beijing Youth Daily reporter Dong Zhenjie

Edit/White Dragon