The Ho Chi Minh City Greenery Parks Co. Ltd. has been using a specialized instrument to pinpoint trees with wood decomposition inside to prevent tree-falling incidents.
The instrument detects plants that are puffy and hollow inside by wavelengths, a company representative told Tuoi Tre (Youth) newspaper on Friday morning.
It measures the flow of sap from the roots to the branches of each tree.
Ailing trees have slower sap circulation than healthy ones.
“Using the instrument in combination with observation and our experience can help find decayed trees that may fall given heavy rains and strong winds, so that we can timely handle them,” said the representative.
“This instrument is handy, and its components are widely available in the market, so we don’t have to depend on a certain manufacturer."
|This supplied photo shows employees of the Ho Chi Minh City Greenery Parks Co. Ltd. using a specialized instrument to detect decayed trees at a park in Ho Chi Minh City.|
The Ho Chi Minh City Greenery Parks Co. Ltd. once tried out the machine in 2013 but abandoned it shortly after due to lack of spare parts for replacement.
Before the introduction of the instrument, greenery workers of the enterprise mostly detected decayed trees manually based on experience, particularly through observing the appearance of the trees, according to company director Le Cong Phuong.
“This manual method is not completely efficient as many trees look fine on the outside but their internal structure has been destroyed by pathogens,” Phuong admitted.