Anti hail net manufacturer Sona agrotex's Anti hail net Why are Anti hail net used ? Hail is considered to be the most dangerous element for crops as it affects all types of production. Indeed, it can damage or destroy ongoing production but also hurt branches, buds and trunks which will materialize the following years as a drop in productivity. The more efficient protection system of the plants, which also ensures a continuity of production over time, is surely the installation of anti-hail nets.