Feltiella acarisuga
Spidend depends on climate, crop and spider mite density and should always be adjusted to the situation. Start introduction as soon as the first spider mites [...] from the eggs, the midge larvae start to feed on spider mite eggs, nymphs and adults. They use their mouthparts to first immobilise their prey and then [...] consume 15 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