What about the key points for selecting flour mesh?...

In order to prevent viruses in vegetable cultivation, 60 mesh insect nets are installed at the upper and lower air vents in the vegetable greenhouse. In this case, insects such as whiteflies can be completely blocked out. Be sure to bring the pests in and bring out viruses. Reduce the incidence of vegetables.

The cooling of the greenhouse also caused a certain impact. Even if the shading net is used to cool down, the temperature in the shed is still high due to poor air circulation in the shed, and the maximum temperature in the shed is still maintained above 35 ° C. So, how should the vegetable farmer cool down after the device 60 intends to prevent insect nets?

Open the upper and lower draft openings of the greenhouse to a relatively large position. This kind of grass curtain has been used in the past. The air vent at the top of the greenhouse can be opened to the maximum, that is, the air vent film can directly support the southern margin of the back slope of the greenhouse. After increasing the air vent, the shed can be accelerated Discharge of high-temperature air inside.

Nylon mesh can help regulate the temperature inside and outside the shed when it can be used.

Because the current temperature is generally not lower than 15 ℃. Therefore, as long 

as it is in a good place, the vegetable farmers can open the product's upper and lower air outlets day and night, and close the upper and lower air outlets of the greenhouse when the temperature is low or it is raining on a cloudy night

For greenhouses with 60 mesh insect nets, vegetable farmers do not need to set up windscreens. When the vegetable farmers used to set up a windshield, they were all in order to prevent the cool wind outside the shed from blowing into the shed, and to prevent the tomato fruits cultivated in the shed from showing peel.

Now using a high-density insect screen, the insect screen will definitely block the cold air outside the shed, slow down the speed of the cold air entering the shed, and preheat the cold air during the process of entering the shed. It can also prevent The epidermis of the tomato is scratched.

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