Recently, we were presented with a challenge focused precisely on this fact: protecting a Protected Designation of Origin cider apple orchard from Asturias. Specifically, we had to develop a solution that would protect these cultivars from phytoplasmosis, a serious disease caused by a phytoplasma that alters tree development and reduces productivity, affecting leaves, flowers, and fruits, and causing symptoms such as the proliferation of axillary shoots or enlarged stipules, as well as lower-quality fruit.

To combat this disease, we collaborated with the Regional Agri-Food Research and Development Service in the installation of a nethouse greenhouse in Grado (Asturias).

The project was conceived as a way to protect the crop from the vectors that transmit this disease, mainly small insects. To achieve this, we implemented the following systems:

• A greenhouse-type structure covering 4,320 m² and standing 5 metres high, designed to protect apple trees from which plant material will be obtained for propagation.
• A double-door system to ensure that entry does not contaminate the crop.
• Door brushes to prevent insects from entering.
• A complete enclosure that acts as a barrier against the previously mentioned vectors and other harmful insects, as well as adverse weather conditions.

We are especially proud of this nethouse greenhouse because every healthy apple tree will contribute to preserving native apple varieties and the Intangible Cultural Heritage of our region.