Pest control is one of the key tasks of summer gardeners, how is Xuhui District controlled termites that make people's scalps tingle and tianniu that harm trees? Xiaobian will introduce to you the control methods of termites and tianniu.
One | Termite control
termite
There are three main types of termites that can harm garden trees in Shanghai, namely Taiwan milk termite, yellow-breasted loose termite and black-breasted loose termite, of which Taiwan milk termite has the largest occurrence.
Taiwanese lactotermesformosanus (Shiraki, 1909), a species of termite in the genus Cockroaches, isoptera, is a type of termite in the genus Lactophthalmoeae of the nasal termite family. It is a kind of earth and wood amphibian termite, which is difficult to control.
Note: Ants and termites are two very different insects!
Photo // Taiwan milk termites - worker ants
Life history of termites
1 Dormancy period
Termites enter a dormant period when the ambient temperature drops below 10 °C each year, and the entire population moves to the inside of the tree or under the soil layer for dormancy.
2 Period of divergence
In late spring and early summer (April-June), winged breeding ants fly out of their nests and fly low near trees or buildings not far from the nests, with a short flight time, usually at night. Due to the phototropism of insects, they often gather in the position of light poles or spread into residents' homes to cause discomfort.
3 Hazard period
Termite colonies continue to harm until late autumn dormant from April onwards.
- Control termites in addition to controlling flying ants
It's more important to clear each nest -
We are in action
As early as the 1980s, we began to try and explore how to effectively control tree termites, study treatment strategies and experiments with new drugs and baits. Through the establishment of professional prevention and control teams, continuous improvement of prevention and control programs, continuous innovation and industry exchanges, the street trees in Xuhui District are protected from termites.
Note: The process of termite control
Xuhui Garden Termite Control Team
The prevention and control team is composed of professional street tree team members, the team members include post-80s, 90 retired soldiers and party members, each member has more than 4 years of experience in tree termite control, and the team leader Cao Zhen has been quietly struggling in this position for 9 years, and the current team members can be competent for routine investigation, monitoring and prevention and control in the work area.
Areas currently being controlled ●●
The main road in Hengfu Landscape Area
(Yuqing Road, Guangyuan Road, Xinle Road, Xiangyang South Road, etc.)
A precinct junction area
(Changle Road, South Shaanxi Road, Xingguo Road, Huashan Road, West Huaihai Road)
Parks in Xuhui District
(Xujiahui Park, Xiangyang Park, Caoxi Park, Hengshan Park, etc.)
Termite surveys
Hazards are found
Conduct a check
Hot summer days They are busy on the streets
Just to not miss a point of danger
The highest temperature of the year is also a critical period for termite control
| Tianniu prevention and control
Let's introduce the recently carried out "street trees, green space cattle prevention and control work"!
Celestial cattle species
1. Star Celestial Bull
Host plants: harmful to plane trees, willow trees and other plants.
Occurrence pattern: One generation occurs in Shanghai every year, and the old mature larvae overwinter in the moth channel of the trunk or main root, and resume the activity hazard in March of the following year. Pupalization begins in April. Adults are feathered in mid-to-late May, feathering is at its peak from late May to June, and a small number of adults are still feathered in August and September. The peak spawning period is in June, and the eggs are generally laid on the lower part of the main lateral branches or the base of the stem and on the roots of the exposed side. Hatching larvae can be seen in early June, and in August the larvae moth into the xylem and excrete wood chips-like feces outside the tree. Food intake stops around November and enters the wintering period.
2. Peach-necked celestial cow
Host plants: Harmful to red leaf plums, cherry blossoms and other plants.
Occurrence rules: 1 generation occurs in Shanghai in 2 years, and the larvae of different ages overwinter in the branch moth, generally the young larvae overwinter in the endoglote, and the elderly larvae overwinter in the xylem. The following spring the larvae begin to move, and when the damage is severe, the excrement piles up at the base of the tree pole. Adult feathering occurs from June to September, and adult feathering peaks from July to August, when the eggs are laid in the bark crevices. After hatching, the larvae first moth under the phloem cortex to form a curved worm path, and the fecal debris is piled up in the cortex, and the appearance is not obvious at this time. The elderly larvae form irregular detours in the xylem, and the moth and feces are both stuffed in the cortex and excreted from the borer holes, and can accumulate in large quantities at the base of the trunk, showing a reddish-brown color.
3. Cloud-spotted celestial cow
Host plants: harmful to ash, mulberry and other plants.
Occurrence pattern: 1 generation occurs in Shanghai in 2 to 3 years, and larvae and adults overwinter in the pupal chamber. From May to June, they fly out of the trunk one after another, a small number of adult insects appear in April, adult insects eat leaves and new branches and tender skins to supplement nutrition, especially like to eat roses, ash and other plants, day and night can fly activities. In mid-June, the spawning season is at its peak, and most of the eggs are laid on tree trunks under 1.5 m above the ground and with a chest diameter of 10 to 20 cm. The hatching larvae are infested in the phloem, and the bark of the victim site is protruding, longitudinally cracked, and fecal debris is discharged, which accumulates at the base of the tree pole.
4. Mulberry Cow
Host plants: Mulberry, elm and other plants
Occurrence pattern: Shanghai occurs in 2 generations in 2 years, and larvae overwinter in the trunk moth road. In late June of the following year, it feathers into adult insects, and the adults prefer to eat the bark, young leaves and shoots of mulberry plants such as trees and mulberry trees to supplement nutrition before spawning, and the adults have a long lifespan, and a small number of adult insects can still be seen in early November. Adults begin to lay eggs in early and mid-July, and in late July the larvae hatch, incubating the larvae can moth into the xylem, gradually inward and downward moths, the moth is straight, and every other distance bites outward a row of fecal holes to excrete the worm feces. When pupating, the head is turned upwards, the holes at both ends are filled with wood chips, and a round feather hole is bitten when feathering. Unlike the general dry moth pests that like to harm the growth of weak trees, the mulberry cattle are more aggressive and harmful to tall, vigorously growing and branched trees, and vice versa.
5. Thin-winged sawn cattle
Host plants: poplars, elm and other plants.
Work is carried out
1. Development time
Mid-to-late July to early November
2. Hazard characteristics
This pest is an important pest on garden trees. Mainly larvae drill the stem of the plant, and form a moth hazard in the phloem and xylem of the plant to weaken the growth of the plant, causing "wind folding", and in severe cases, it can cause plant death. Its larval hazards are characterized by wood chips piled up at the borer holes, and the adults will nibble on the tender skin of the new shoots, affecting the normal growth of the plant, causing the tree to weaken, resulting in death, and the damaged branches are easy to break when they encounter strong winds.
3. Prevention and control means
(1) The plant protection personnel will check the hazard situation and count the number of borer holes for each tree.
(2) The conservation department carries out the control work of manual hook removal and destruction of larvae, and reports the number of grasps and synchronizes the data into the summary table on a daily basis.
(3) For the spawning period of Tianniu adults: spray control measures with 8% green Weyley 200 times liquid, spray once every 20 days, 2 to 3 times continuously.
(4) In the case of unhooked, the pharmaceutical fumigation work can be carried out: the perfusion fumigation work is carried out, and then the cotton is kneaded into a ball to fill the hole for wound treatment (wound applicator).
(5) After the completion of the first round of road prevention and control, the road will be reviewed to avoid omissions and cause trees to suffer harm, such as prevention and control work.
All the efforts are only for Xuhui to be better!
Author: District Greening and City Appearance Bureau
Edit: Wei Li