The struggle of human beings from the beginning of farming has never stopped, so there is a saying that "the insects catch the grain and the insects catch the cotton." Conventional methods for controlling cotton bollworm are: 1. Artificial catching insects 2, pesticide control 3, comprehensive control 4, biological control 5, natural control. These conventional methods of prevention and treatment have both advantages and disadvantages. The role of viral insecticides is now described.
The status and role of viral insecticides in the comprehensive control or biological control of cotton bollworm 1. The biggest advantage of using virus insecticides to control pests is that the target field sprayed with viral insecticides not only causes infection of contemporary target pests. The disease, and through the larvae of the susceptible larvae, adults, eggs and dead larvae can infect the next generation of larvae, the virus in the host population proliferation, and even spread epidemic, so that the target host is at a low level for several years;
2. The important feature of insect viruses in the prevention and control of pests is their specificity to the host. It is an ideal means of prevention and control in the integrated control system. It is beneficial to control pests (not all passers-by) and benefit the whole ecosystem. The potential of insects is exploited. The participation of virus pesticides in bio-control is an ecological control method. The purpose is not to completely eliminate pests, but to control the population of host pests on which the natural enemies survive to be below the economic threshold, restore the benign ecological cycle of farmland, and finally obtain the maximum benefit. .
3. People have fully realized that the protection of the ecological environment and the sustainable development of agriculture have become the two central problems facing humanity in the 21st century. The core connotation and basic characteristics of biological control are its integration with the ecological environment and sustainable development. Unity. Biological control is the inevitable development of science and technology in human society. Insect virus insecticides are powerful weapons for modern agricultural engineering that meet the requirements and development of the times and target organic food.
4. Viral insecticides have the advantages that general biological pesticides do not pollute the environment, do not harm natural enemies, are highly safe for humans and animals, and are not susceptible to pests. In addition, recent studies have shown that the virus has a certain "weakening" effect on host insects, which can weaken the ability of infected host to fly, reduce the rate of egg production and hatching, and degrade other physiological functions, causing the natural mortality rate to rise. The resistance is also significantly reduced, which is advantageous for the integrated control of pests.
Prefabricated K house are a kind of Prefabricated House. It uses light steel as the skeleton and sandwich panels as wall panels. It only needs to determine the design and basic area requirements, so the rapid construction of such container houses is also the same. All guaranteed. Moreover, standard accessories are used for later assembly, which can make reasonable use of space, and each part is intended to be connected by bolts, which is also very good in terms of practicability. Moreover, its material quality is high, its long-term reliability is guaranteed, and its stability is also very good.
Material safety is guaranteed
The prefabricated K-shaped house is a new type of light steel composite board house. It uses color steel, light steel and other materials for construction, and it is also very convenient to install. Moreover, its steel plates have a certain thickness, even if it is an earthquake of magnitude 7 or above, it can also ensure stability, and there is no need to worry that it cannot be used in some harsh environments. Therefore, even in some earthquake disaster areas, etc., such houses can also be used, and the safety is still very guaranteed.
Overall construction cost is lower
Compared with ordinary houses, the construction cost of prefabricated K-type houses is still very favorable. Because sandwich panels are generally used, the materials can be recycled, and the repeated disassembly and installation of the house, and the second use are also guaranteed. This can effectively reduce construction waste, and achieve the effect of energy saving and environmental protection. Moreover, this type of house has a long service life and can be reused many times, so its cost performance is also good.
High construction efficiency
Prefabricated K house and Prefabricated T House only needs to have a good basic design, so the construction can be completed quickly. The construction team only needs to complete the construction according to the drawings, and the house construction can be carried out quickly. Moreover, the interior decoration is simple, and generally some light decoration materials can be selected, which can not only save the overall decoration and construction costs, but also ensure that the house can be put into use quickly, and the reliability of use is also guaranteed.
Prefabricated K House,Custom Duplex House,Prefabricated Mobile House
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