Tetranychus urticae, or Red Spider Mite, is a tiny 8-legged arachnid. They belong to a family called Tetranychidae which contains many other cell-sucking mites considered serious plant pests.
They're barely visible with the naked eye, so they can be difficult to identify, and even detect on plants. Tetranychus urticae is by far one of the most common species found worldwide.
Spider Mites are especially common in glasshouses, where temperatures are warm. They're a frequent pest of houseplants, too.
One of the main symptoms to look out for is tiny, dusty cobwebs. They're easier to spot in front of a light. Leaf mottling is another common symptom associated with Spider Mites.
They have a broad host range, feeding on anything to vegetables, fruits and ornamental plants such as roses.