Feltiella acarisuga
adult spider mites or up to 50 mite eggs per day. They are aggressive and adapt the amount of food they consume to the density of the spider mite population [...] appear on the body. A fully grown larva is about 2 mm long. At the end of the last larval stage, the larva spins a white cocoon near a leaf vein and pupates [...] Feltiella acarisuga is a predatory gall midge highly effective in the biological control of spider mites . This beneficial insect, native to Europe, preys on