In view of the problems associated with pesticides and increased costs, modern greenhouses should not be without proper insect net. Properly installed insect screens can prevent insects from invading while providing the maximum possible airflow, which is essential for optimal crop yields.
No matter what kind of cooling and ventilation system you use, you need to consider anti insect net. Shielding the air inlets can have a significant effect, but all greenhouse openings, including service doors (which should include double screen doors), should be shielded for best results.
In order to prevent insects from entering the greenhouse, we usually install insect nets at the vents. It can keep insects away from growing areas and protect plants without using or using less pesticides. This is a way to protect the environment and is conducive to the sustainable development of agriculture.
There are three types of insect-proof nets for agricultural greenhouses to meet the requirements of different plants. One is silver-gray or aluminum foil paper, which has good aphid repellent effect and can reduce the temperature of the greenhouse; the second is white, its light transmittance is much better than silver-gray, and it has a wider range of uses. It is suitable for light-loving plants, but it will be used in summer. Increase the temperature in the greenhouse; the third type is black, which can play a role in shading and cooling.
The installation of insect nets at the vents of the greenhouse will significantly increase the ventilation resistance. It is necessary to install it during the pest period and continuously monitor the temperature in the greenhouse. When the pest has passed, it is best to remove it.
If the period of pests and diseases is the same period when the greenhouse needs ventilation and cooling, it is best to pay more attention to the following points:
1. Increase the area of the insect-proof net or the area of the vent to ensure adequate ventilation. Replacing hard polyethylene walls with nets and rolled polyethylene films is a good natural ventilation method to increase the ventilation rate;
2. In a ventilated greenhouse, a protective net can only be installed at the vent;
3. Keep the surface of the protective net clean.