What are the hazards of termites?

Termites are insects of the order Blattella, which are found on six continents except Antarctica. They usually live in a dark environment, nesting in soil, wood or tall soil ridges. The activities of building tunnels are hidden, and the harm is not easy to be detected. once found, the loss is serious and irreparable. Let's take a look at the harm and control methods of termites.

What are the hazards of termites?

The damage caused by termites is staggering, which is mainly manifested in the following aspects:

1. Harm to crops: generally speaking, termites are not important pests to crops in China. However, the harm to the cash crop sugarcane is still more serious. The main species are: Taiwan domestic termites, yellow-winged termites, black-winged termites, Hainan native termites, Taiwan milk termites.

2. Harmful to trees: there are many species of termites that harm trees, the main species are: new termites, sand termites, domestic termites, tree termites, scattered termites, wood nose termites, soil termites and large termites, original termites and so on.

3. Destroy the building: the termites destroy the building, especially the brick and wood structure and wood structure. Because it is hidden inside the wooden structure and destroys or damages its bearing point, it often causes the house to collapse suddenly, which attracts people's great attention. In China, the main termite species that harm buildings are: domestic termites, scattered termites, pile termites and other genera. Among them, the species of termites is the most serious damage to buildings. It is characterized by strong diffusion, large groups, rapid destruction, and can cause huge losses in a short period of time.

4. Destruction of river dikes: the seriousness of termites harming river dikes has been recorded in detail in the ancient literature of our country, and the records in modern times are more detailed. Its species include termites belonging to the genera of termites and termites. They nest densely and breed rapidly in the dike. The nursery is dotted (except domestic termites), and the ant path extends in all directions. Some ant paths even pass through the inner and outer slopes of the dyke. When the water level rises in the flood season, pipe leakage often occurs, and even more intense ones lead to the collapse of the dike.

5. Termites can corrode silver: termites secrete a high concentration of formic acid, which reacts with silver to form silver formate, a black powder that will be eaten by termites.

However, according to statistics, more than 90% of termites pose no harm to human beings, and most of these species are distributed in tropical and subtropical mountain forests and grasslands. They play an important role in accelerating the decomposition of surface organic matter, promoting material circulation, purifying the surface and increasing soil fertility.

The method of killing termites

1. Try to find the ant nest or ant path where the ant harm is found. First of all, the ant-killing powder can be sprayed on the termites in the ant nest or in the ant road as far as possible, so that they can transmit toxicity to each other and achieve the control effect.

2. In the place where the harm of termites is found, the wooden door and window frames are drilled at a certain distance, and the surrounding soil is sprayed at the same time, so that the wood and soil contain certain toxins. Termites will be poisoned and die if they touch poison and feed.

3. Trapping and killing, because pesticide spraying is easy to cause soil pollution and destruction, biological control is used to intercept and kill termites in Europe and the United States and other developed countries and regions.

Control methods of termites

1. Ecological prevention and control law

The ecological prevention and control method is to take all necessary measures or carry out various activities in the long time before, during and after the construction of buildings and water conservancy projects, and in a series of planting work according to the requirements of termite control. to create an environment that is not conducive to the breeding of termites and to protect buildings, soil dams and agricultural and forestry crops from termites.

2. Biological control method

Based on the interspecific struggle in nature and the relationship between termites and fungi, the natural enemies of termites are used to control termites and fungal indicators are used to find nests.

3. Physical and mechanical prevention and treatment.

Methods of controlling termites by using artificial, instrumental and physical energy such as light, heat, electricity, sound and waves:

① nest digging method.

② trapping method (light trapping and killing winged adults, bait trapping)

③ thermal killing method

④ builds sand barrier to prevent termites from crossing

Application of ⑤ biophysics in termite control, high frequency and microwave killing, radioisotope ensemble, using sound frequency to detect nests, using resistivity to detect nests, and using ground penetrating radar to detect termite nests.

4. Chemical prevention and treatment

Using all kinds of toxic chemicals-pesticides, through certain methods, directly contact the termites, or deal with the habitat, breeding places and harmful objects, so that the termites are poisoned to death as a result of contact or ingestion of insecticides, or it may have a repellent effect and can not invade the harm. It is characterized by quick effect, high efficiency, easy to use and less limited by the region.

The dosage forms of ① termite control agents: powder, wettable powder, emulsion, water agent, oil, tablet (lozenge), smoke.

The application methods of ② insecticides for termite control are as follows: spraying powder, spraying liquid, pressing injection, fumigation, cigarette pressing, brushing, impregnation, food trapping, tracking hormone trapping, poison bait, construction of toxic soil belt, seed soaking, watering, irrigation of drug-containing mud, anti-ant drug belt package.