What is insect netting?
Anti-insect netting is a very useful and effective physical method to fight against pests and diseases, which is installed in the roof and side windows of the greenhouse and prevents the entry of insects and birds into the greenhouse, as well as the exit of useful pollinating insects (biological control of pests in the greenhouse). ), protects. There are different types of anti-insect nets, which should be selected based on some points such as the size of the holes, the size of the mesh, the diameter of the threads, resistance to air flow (all nets with the same specifications do not have the same resistance), dust absorption. , optical characteristics (reflection and transmittance), UV value, design of the structure and especially its valves, etc. The air flow, which is supposed to be constant and free of any changes, is better to use the type of fixed installation of the anti-insect net. Most of the vents that are on the roof of greenhouses are one of these examples. Anti-insect mesh of opening window: Some of the vents in the walls of greenhouses are similar to windows. These valves should be installed in such a way that the anti-insect net can be opened and closed easily. The definition of the frame in the installation of this type of valve has a negative effect on the full performance of the greenhouse air conditioning system. Accordion anti-insect net: Anti-insect nets in the form of roof vents, side windows or any type of design can be designed in the form of an accordion. become The opening and closing accordion design of the anti-insect mesh requires less volume and space than the methods defined in the previous paragraphs.
Advantages of anti-insect nets
– Definitely, the most important and main goal in installing and benefiting from an anti-insect net is effective resistance in dealing with pests and destructive insects. Insects are definitely the main enemies of plants. They feed on plants and in order to achieve maximum production efficiency in a greenhouse environment, you should benefit from an anti-insect net in each of the greenhouse entrances. Of course, keep in mind that the type of net should be chosen according to the type of insect that attacks the plants you are growing. Using an anti-insect net will significantly reduce the use of pesticides or insecticides. When there is no insect involved, there is certainly no need to use insecticides. Therefore, by installing an anti-insect net, you do not need to spend a lot of money on the preparation of various insecticides or professional tools such as motorized sprayers. On the other side of the story, reducing the use of pesticides will lead to the production of more organic products, and finally, by installing an anti-insect net, which will result in a decrease in the percentage of use of pesticides, a positive effect on preserving the environment around the greenhouse. We have put Because we are faced with less presence of pesticides in air and water. Installing insect net has a significant effect in reducing the costs of biological pest control. In a greenhouse environment that is isolated, everything flows naturally. A stable ecosystem without the presence of risks caused by pests will make the entire greenhouse space completely safe and suitable for the growth and development of plants. Therefore, it no longer requires spending a lot of time and energy to fight pests with biological methods. Greenhouse environments are large. As a result, in the presence of even a small amount of destructive insects, we have to carry out heavy pest control. An action that is not simple. Anti-insect netting has a significant effect on reducing these costs.
Important factors in choosing an anti-insect net
Anti-insect nets have different types, which should be selected based on some points such as the size of the holes, the size of the mesh, the diameter of the threads, resistance to air flow (all nets with the same specifications do not have the same resistance), dust absorption , optical characteristics (reflection and transmittance), UV amount, structure type design and especially its valves, etc. But the most important parameters include the following:
One of the most important points in choosing and installing an anti-insect net for the greenhouse is to know that each plant is attacked by certain insects. Different plants have different pests. Knowing what pests attack your desired product will help you choose the right mesh for insect netting.
Most of the anti-insect nets are made of polyethylene (nylon), which has high durability, strength and flexibility, and is also resistant to moisture.
The smaller the mesh diameter, the better the ability of the greenhouse insect net to repel smaller insects. But reducing the diameter of the meshes has a negative effect on the ventilation of the greenhouse. Insect thrips are very small and the greenhouse anti-thrips net can also prevent other insects from entering. The high mesh diameter is suitable for protecting the greenhouse from large insects such as grasshoppers. For example, mesh 50 with very small pores is designed to prevent the entry of thrips.
Another important factor when buying an anti-insect net for a greenhouse is the amount of shading. Shading refers to the reduction of direct sunlight. Since the place of installation of various types of insect nets is in front of the greenhouse windows, these nets are usually installed in the walls or roof of the greenhouse and are exposed to constant sunlight. It has a coated net that makes it resistant to ultraviolet (UV) rays. However, the presence of sunlight in the greenhouse is essential, and for this reason, you cannot use an insect net with a high percentage of shading. Also, this net must be resistant to heat and not change its shape under the sunlight. Polyethylene is a material that, in addition to having good flexibility and strength, is also resistant to moisture. It should also be noted that the anti-insect net must be resistant to corrosion. Acid rains or poisons used for pest control should not cause corrosion of net material and its destruction. Also, humidity should not have a negative effect on the structure of these laces. The standard shading rate of the anti-insect net is about 20-30%. The percentage of shading increases with decreasing mesh diameter.
The net weight per square meter is also one of the important factors in buying this net. Normally, the weight of these nets is from 120 to 140 grams per square meter. Tensile resistance also refers to the resistance of the net against the force and weight of objects. The tensile strength of the greenhouse anti-thrips net should be at least 18 kg. This net is constantly exposed to pressure, which can be caused by various phenomena such as impact, birds sitting on the net, pressure from tree branches or objects hitting the net, for which a resistance of 18 kg is suitable.
یکی از فاکتورهای مهم دیگر، تکنیک به کار در بافت توری ضد حشره گلخانه است. سوراخ های توری باید بسیار ظریف، کوچک و یکنواخت باشند تا از ورود حشرات کوچک جلوگیری کنند. توری در رول های بزرگ تولید می شود. پس از هنگام برش توری برای استفاده در مکان های مختلف گلخانه، باید دقت کنید که توری یکنواختی و فرم خود را از دست ندهد.