Oligonychus ununguis

Spruce spider mite

Description

Oligonychus ununguis, commonly known as the spruce spider mite, is a species of mite that belongs to the Tetranychidae family. It is cosmopolitan spider with uncertain origin, infests various coniferous trees, with a particular preference for spruce trees.These mites are extremely small, measuring only about 0.5 millimeters in length. They have eight legs and a rounded body covered in tiny hairs. Oligonychus ununguis mites are typically yellowish-green in color, but they may appear reddish or brownish depending on their life stage and environmental conditions.Spruce spider mites are known to cause significant damage to host trees. They feed on the needles of conifers by puncturing the cells and extracting the sap. This feeding activity results in the yellowing, browning, and eventually the death of the needles. Severe infestations can lead to defoliation and weaken the overall health of the tree, making it more susceptible to other pests and diseases. Dangerous in garden and parks, and also in christmas trees plantations.The damages caused by Oligonychus ununguis mites can be particularly problematic for spruce trees, but they can also affect other conifer species such as pine and fir. These mites thrive in dry and warm conditions, which can excelerate their population growth and increase their destructive potential.