Recent
Netizens in many districts of Tianjin reflected,
A large number of caterpillars have appeared around the community
Some trees have been eaten away and are on the verge of death
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@phyllis: Dieshan Road, Dongli District, almost all the trees on both sides of the road were bitten to death. Around the community, the kindergarten entrance is full of trees, caterpillars, and even climbed to the home.
@ Shuolan Starry Sky: All the trees in the Yideyuan community in Hedong District, Tianjin are full of caterpillars, caterpillars and their feces are all over the ground, which is extremely disgusting.
@Xiaoqing's little sun has unlimited energy: ask for help!!! Most of the trees in Jinwan Garden in Hedong District have been damaged by the pest American white moth, and the caterpillars are all over the ground, and have climbed into the residential buildings, passing under the trees at any time there is danger, which has seriously affected life.
@ Restless Little Fire Pig: In the south of The Ring Lake in Hexi District, a summer caterpillar was not treated, and now it has feathered and entered the home.
@ mobile phone user 2402297103: The caterpillar flood in the Jinxiyuan Community on Hongqi South Road in Nankai District hopes that the relevant departments can coordinate and deal with it.
@ My family's corgi dog is called Ke Nan: Hongqiao District New Year Garden Community. Many tree plants have attracted bugs. About 1/3 of the trees have a caterpillar.
@JessicaShe-: Hongdu Garden in Hongqiao District began to plague many trees in July, and 20% of the trees under the third phase of the community appeared, and some trees were on the verge of death.
@Woman Sleeping Standing: Creepy and can't bear to look at it directly, this is the home we live in
(Coordinates: Near Chentai Bridge, Beichen District)
@yoshiiiii: Tianjin University of Science and Technology.
@Director Pan: Caterpillar plague at Tianjin Academy of Fine Arts... I don't dare to take a bath
Many netizens reflected
This year's caterpillars are particularly abundant and almost infested
Why are there so many caterpillars this year?
This year there was a lot of rain, and the American white moth had three peaks of harm in Beijing
Yang Zhongqi, counselor of the State Council and chief expert of the Chinese Academy of Forestry, told reporters that many of the caterpillars that the public has recently reported are actually the larvae of the American white moth.
The American white moth is distributed in Tianjin, Hebei, Liaoning, Shandong, Shaanxi and Henan provinces, and has now crossed the Yangtze River and is distributed in Hubei, Anhui and Jiangsu provinces. According to the survey, the American white moth can harm more than 80 species of forest trees, fruit trees, flowers and crops. The U.S. white moth has been included by the State Environmental Protection Administration in China's first list of 16 invasive alien species.
Yang Zhongqi said that the American white moth usually appears after rising temperatures in late April and early May, and can breed two to three generations in Beijing during the year. Because the current temperature is still relatively high, the climatic conditions are suitable for their survival, so the American white moth has seen three spikes in harm in Beijing this year.
This white moth has a characteristic, that is, it reproduces quickly and is harmful. Adult insects are pure white, often laying eggs on the back of the leaves of mulberry trees, ash trees and other trees that it likes to eat, they lay a large amount of eggs, they can lay more than 2,000 eggs at a time, and lay a layer of piles. Therefore, after the eggs grow into caterpillars, they also live in clusters at first. "These caterpillars have black and white longitudinal stripes that are easy to identify."
He said that hundreds of larvae gathered together to spit out a silk knot net, connecting the leaves together to feed on it, and they "reported the ball for warmth", and the net was so thick and dense that it was very resistant, and birds and other predators were not easy to drill into. Caterpillars will grow slowly after peeling, peeling once to increase the age, the American white moth to the end of the fourth instar, the height is already very large, will break the net out of the "single fight", climb to the treetops to eat leaves. At the end of the fourth to the sixth age, it is a period of binge eating, and it takes a few days to eat the leaves of a tree. So the American white moth is very harmful. "All the leaves of broad-leaved trees, they basically eat, they also eat flowers and crops, and when they meet what they like to eat, they eat more and grow faster." But they don't eat conifers because they can't digest the pine resin in the conifers. ”
After eating the leaves, the caterpillar will crawl around in search of other plant leaves that can be eaten, and even enter the homes of residents and climb to the floor, beds and ceilings. Sometimes they also climb onto cars or vans and are taken elsewhere by vehicles, so they spread quickly.