Foreign invasion of plant purple stem Zelan "invaded" Chengdu expert: No need to panic.

Cover Journalist Yu Tingtu According to the Plant Science Data Center of the Chinese Academy of Sciences

"For the first time in Chengdu, a foreign invasive plant -Zixian Zelan!" On June 28, Chengdu Mori Station received a call from multiple citizens, reflecting the seeing the purple stem Zelan. Not long ago, the team of associate researchers of Zhang Yuanbin, the Institute of Chengdu Mountain Disaster and Environment of the Chinese Academy of Sciences, launched a "Chengdu Wild Plants Investigation and Monitoring Work" in Chengdu and discovered the foreign invasive plant -purple stem Zelan. This is the first time that this species has appeared in Chengdu for the first time in Chengdu. Essence Therefore, many citizens also report to the Mori Station to report the trace of purple stems Zelan. According to the experts, they have carefully identified it. At present, the citizens have excluded the purple stems Zelan.

"You don't have to panic. It is judged that there are two important criteria for this plant. One is that its flowers are white, and the other is that its stems are purple." Relevant experts from Chengdu Mori Station provided you with " Raiders. It is understood that the team of researchers discovered more than 20 Zi Zelan, about one meter high, and was distributed in groups. There was no sign of diffusion. After discovering, the experts have been eliminated and destruction of the purple stem Zelan, and at the same time, the surrounding green areas are conducted key monitoring and inspection.

The purple stems are named after their stems and petioles, and they are also known as damaged grass. Perennial herb, native to the Americas. The earliest was introduced as an ornamental plant to Europe, and later became a worldly harmful weeds. At about the 1940s, it was transmitted to Yunnan Province through the natural spread from the China -Myanmar border through the my country -Myanmar border, and then spread to Guizhou, Sichuan, Guangxi, Tibet and other places. Because there are no natural enemies and competitors, the diffusion area of ​​Zixian Zelan in Yunnan has reached 64%of its land area. The top of the list.

The purple stems have a strong breeding ability, and each plant can produce tens of thousands of seeds, spreading with the wind. At the same time, because the purple stems are poisonous and have no biological consumption, it will help them grow and reproduce. In addition, the purple stem Zelan contains some chemicals that can inhibit the growth of other plants. These substances can secrete the growth and development of the original plant through the root system and destroy the original ecological balance.

If citizens find such plants, they can report to the relevant departments of garden greening.

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