[Commentary] Around April of each year, flying catkins become a "beautiful trouble" that haunts the city. In order to reduce the impact of catkins on people's lives, recently, the greening department of Suzhou City, Jiangsu Province launched catkins prevention and control work.
【Explanation】 According to the greening staff, the catkins prevention and control mainly adopts the “injection” method. They first need to measure the “waist circumference” of the willow tree, and determine the “needle dose” according to “injection” every 10 cm. After the position, the staff used an electric drill to "pinhole" the trunk.
【Concurrent period】 Operator
Tilt at a 45 degree angle, then hit 3 to 5 cm (cm depth).
【Explanation】 The agent called gibberellic acid is a broad-spectrum plant growth regulator that can promote plant growth and development and inhibit reproductive flowering.
【Concurrent period】 Gu Guohai, Associate Professor, College of Horticulture Science and Technology, Suzhou Agricultural Vocational College
Used this year and effective next year. Generally catkins are floated in April every year. Under normal circumstances, (us) it is better to use it within 20 to 30 days after the floats. It can suppress the weathering of its flower buds. .
[Explanation] It is reported that before mid-May, the local greening department will implement "prevention and treatment surgery" on more than 5,000 willow trees in the Gusu District of Suzhou City.
Wu Lihong, Suzhou, Jiangsu report
Editor in charge: [Ye Pan]