Feltiella acarisuga
acarisuga is available in plastic cups ( Spidend ). Make a hole in the lid and place the cup on the rock wool slab or directly on the soil Protect against [...] effective in the biological control of spider mites . This beneficial insect, native to Europe, preys on various spider mite species, in particular the two-spotted [...] 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