The staff sprayed the white applicator mixed with the agent into the trunk, which can effectively prevent the Tianniu from carving and laying eggs, and also has a killing effect on the existing insect eggs in the trunk. Reporter Li Xiaolei
Recently, many "knots" have grown on the trunks of French plane trees on both sides of Liuyang Dongsha Road. This attracted the attention of the staff of the Municipal Garden Maintenance Center, "This is the pest 'Tianniu' nesting and laying eggs in the trunk, and if there is no manual intervention, the plane tree will face the danger of dying." On October 27, the Municipal Garden Maintenance Center invited disease and pest control experts to conduct "consultations" on many green trees with serious "Tianniu" insect pests in the urban area, and launched the "Tianniu" prevention and elimination war.
Li Xiaolei, a reporter at the Liuyang Rong Media Center
French plane trees are full of "knots", and experts consult on the spot to find the reason
On October 28, the reporter came to Dongsha Road and found that the French plane trees on both sides of the road looked good, but a closer look would find that many plane tree trunks were covered with "knots", and some branches withered and died.
"Since last year, we have found that sycamore trees have suffered from insect infestations." The green maintenance personnel of the municipal garden maintenance center told reporters that after the insect pest was found, they sprayed lime water on the bottom of the trunk according to the traditional disposal method, and eradicated the found insect burrows. "But the problem has not been fundamentally solved."
"We suspect that the 'Celestial Bull' hollowed out the trunk to build a nest to lay eggs, and this pest is very harmful to the tree." The green maintenance staff of the Municipal Garden Maintenance Center said that due to the trend of spreading insect pests, they invited changsha pest control experts to Liuyang to guide the pest control work and brought the latest research and control agents.
On the afternoon of October 27, after on-site consultation by experts, it was confirmed that the French plane tree was full of "knots", and the culprit of the death was "Tianniu", and the technical guidance and prevention demonstration were given to the green maintenance personnel on the spot.
Spray the spread to prevent the celestial calf from spawning
In addition to the French plane trees on Dongsha Road, the American red maple on both sides of Daowushan West Road was also attacked by the "Tianniu". Due to the thin trunk, many American red maples have broken branches, dead and other phenomena, and a large number of wood chips and "tianniu" excrement can be seen in the trunk.
It is understood that the "Tianniu" found in Liuyang this time is the "bare-shouldered star Tianniu", which is an important dried moth pest in China's forestry, and its host range is wide, the food is miscellaneous, the damage is large, and the prevention and control is difficult.
The larvae of the bare-shouldered star tianniu will eat the branches, stems and roots of plants, endangering the normal growth of plants. The damaged plants are prone to phenomenon such as broken branches and lodging, which will cause plant death when serious.
According to experts, when the eggs of the bare-shouldered star cattle hatch out of the larvae, the first-aged larvae will moth into the trunk, initially feed under the bark, and when the age increases, it will burrow into the xylem for harm. When the larvae mature, they form a pupal chamber, the ends are blocked with fibers and wood chips, and in mid-to-late September they feather into adults and overwinter in the pupae chamber.
Therefore, autumn and winter are the best time to prevent and control "Tianniu", "they are less frequent, so there is a chance to kill them directly in the nest." ”
"The traditional way is physical control, finding one place to kill one place, but the effect on trees with serious insect pests is not obvious, and chemical control is needed." At the site, experts carry an automatic sprayer and spray the white applicator mixed with the agent evenly on the bottom of the trunk.
According to experts, this kind of applicator is not easy to fall off, can protect the trunk for a long time, effectively prevent the Tianniu from carving and laying eggs, and also has a killing effect on the existing insect eggs in the trunk. "Usually after half an hour, the applicator is dry and harmless to people and animals."
Next, the municipal garden maintenance center will be under the guidance of experts, the urban green trees to carry out a comprehensive pest control work, if the public friends find that the green trees around the disease and pest, you can call the 83611989 contact the municipal garden maintenance center, they will immediately take control measures.
Source: Liuyang Daily
Editor: Dai Peng
【Source: Liuyang Daily】
Copyright belongs to the original author, a tribute to the original