Feltiella acarisuga
biological control. The predatory gall midge Feltiella acarisuga is used for the control of the following pests: Spider mites Some of the common spider mites [...] and adapt the amount of food they consume to the density of the spider mite population. Where there are large, localised concentrations of spider mite [...] Make a hole in the lid and place the cup on the rock wool slab or directly on the soil Protect against direct sunlight and water Leave the cup in place for