1. The main enemy is thousands of miles away from large mosquito nets. The screens are covered with window screens. This method is more practical in small-scale pig farms. We have tested that if window screens are nailed, they can effectively block the entry of mosquitoes. However, because the screen sashes are relatively intensive, the ventilation inside and outside the house is seriously affected, especially in the high-temperature season in summer. The temperature inside the house is 2°C~3°C higher than that when the windows are ventilated. While solving the problem of mosquitoes, the high temperature of the house temperature, especially the long-term high temperature of the maternity ward, will reduce the sow feed intake. The high temperature of the pregnancy shed will also increase the number of stillbirths. The large mosquito nets will wrap the whole shed. The range of ventilation inside and outside is increased, and the ventilation effect is much better. If measures are taken to install mechanical ventilation facilities, this measure will be much better.
2. The bottom of the kettle is used to control the production of mosquito eggs. The mosquitoes are killed before they become adults. This method is more practical in the northern water-inferior areas, as long as there is a place where there is standing water, such as drains and accumulated water. When insecticides are placed in rainwater and other places, the eggs of mosquitoes are mostly killed; this will greatly reduce the number of mosquitoes in the pig house.
3. High walls In southern China, many mosquitoes fly in from the outside. If one meter of window screening is set on the wall of a farm, the number of mosquitoes coming in can be greatly reduced, plus the mosquitoes in the stadium. Measures are also beneficial to prevent mosquitoes. If it can be designed to take it out during the day and hang it up at night, it will have better results; it will not affect ventilation during the day, and it can be held up to block mosquitoes when there is no need for heavy ventilation at night.
4. Setting up minefields Some mosquito-repellent mosquito breeding farms can also be considered. Because the smell of mosquito coils makes mosquitoes afraid to get close, mosquito-repellent incense sticks in piggeries can prevent mosquitoes from entering piggery. In terms of harm, the investment in mosquito coils is still relatively small.
5. Jianbi Qingchang Weeds are often places where mosquitoes inhabit during the day. If there are no weeds in the farm, the mosquitoes will have no place to hide. Eliminating weeds will make mosquitoes have no place to hide, and it is also a way to reduce mosquitoes.
6. Encourage the enemy to set up a mosquito killer inside and outside the pig house to attract mosquitoes and kill them with drugs.
The above methods are some practical methods adopted by the farms. Each farm should be flexibly selected according to the actual conditions of the farm.
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