There are more and more mosquito diseases in summer, and more and more farmers use the insect prevention net in the greenhouse. Pay attention to cooling when using the insect prevention net in the greenhouse in summer. This section will introduce you to pay attention to cooling when using the insect prevention net in the greenhouse in summer.
In order to prevent virus diseases, 60 air outlets are arranged on the top and the bottom of the shed to prevent insect nets, so as to completely block the pests such as Bemisia tabaci and other pests outside the shed, prevent the virus and other pathogens outside the shed from being brought into the shed by the pest carrying virus, and reduce the incidence of vegetables. However, it also has a great impact on the ventilation and cooling of the shed. Even if the sunshade is used for cooling, the temperature is still high due to the poor air circulation in the shed, and the maximum temperature in the shed is still above 35 ℃.
Secondly, open the air outlet of the shed to the maximum. Now the straw curtain on the shed has been removed, and the air vent on the top of the shed can be opened to the maximum, that is, the air vent film can be directly supported to the south edge of the rear slope of the shed, so after the air vent is increased, the high temperature air in the shed can be accelerated. As for the vent on the front face of the shed, the vegetable farmers can directly support the film to the film pressing steel wire on the front face of the shed, and add the amount of cold air into the shed by increasing the vent, so as to speed up the air activity and reduce the shed temperature.
Third, because the current temperature is generally no less than 15 ℃. Therefore, as long as it is in a sunny place, the vegetable farmers can open the upper and lower air outlets of the products day and night, and then close the upper and lower air outlets of the shed when the temperature is low or when it rains on a cloudy night. The above are precautions for cooling in summer when using the insect control net in the shed.