The raging worms, signs of environmental pollution

Over 10 days now, residential area Ta Thi Ngoc Thao (Phu Thuan, District 7) is suffering from deep raging. According to the scientific community, insect outbreaks are signs of environmental impact by pollution.

Mr. Nguyen Van Dung resided here, said that within the past 2 weeks, the worms clean the garden from the wild chrysanthemum tree, the gourd truss, and the pumpkin to keep on the yellow acacia trees. The caterpillar crawls into the house, onto the bed.

"The hairy feathers are full of air, so no one around 200m around here is unable to escape the unpleasant scene of itching and redness all over their bodies," Dung said.

Three days ago, people bought gasoline and kerosene to clean up the trees around the house, hoping to kill the caterpillars. But only in a short time, the caterpillars clung to the overgrown grass in abandoned fields. The caterpillar crawls on the walls, on the road .

The caterpillar crawls full of sugar, into the house . Photo: H.Cat

Caterpillar outbreak, deep bird decline

The season of "becoming butterfly" usually starts from December of last year until April -5 years later. In the process of becoming butterflies, they fly away to extract bile, mate and produce larvae. July - August is the time when larvae are formed from larvae according to natural law.

"The caterpillar can damage plants, and cause unpleasant itching to humans. However, this nature is mechanical itchiness of the hairs of the caterpillar and touches our skin. We just need to wash it off with water and exposure limits, " Dr. Biology Hoang Duc Huy - University of Natural Sciences, National University of Ho Chi Minh City, explained.

The caterpillars cling to black on the overgrown grass in abandoned land.Photo: H.Cat

Moreover, the worms only last about 1 month. After that, the caterpillar disappears because it has changed to another stage of butterflies and pupae.

According to Dr. Medals, usually, insects have a group of natural enemies such as a group of deep birds or parasitic bees. In particular, the group of deep-bird likes to eat the worm species at a small stage.

Through the phenomenon of local insects, this shows that the living environment of the enemy species is being polluted. Along with the habit of catching live birds, this enemy species is gradually losing living land and declining in number.