Insect net is used to protect crops from outside insects. Insects are main carrier of disease, so anti insect net restrain free entry of insects into contained area. It provides a barrier against insects. Insect net allows air & light to entre in green house / tunnel.
Insect net can also be used to keep beneficial insects inside your greenhouse or hoop house. Insect netting can also be used to contain pollinators and beneficial insects within a row.