Bulb mite (Rhizoglyphus robini) is a highly frequent pest in bulbous plants. It is a small and slowly moving mite. It is a brown coploured mite growing to 0.3 to 0.6 mm in length with a spherical shape and brown coloured legs and jaws. The development rate depends on the temperature. At 16°C, it takes ca. 40 days to develop from egg to egg and only 12 days at 27°C.

Damage to the bulb can be direct as well as indirect. While eating, the mite makes little holes in the bulb which can cause malformation and growth inhibition. Furthermore, these damages are the ideal breeding ground for harmful bacteria and fungi.
The mites prefer to live in moist soil and between scutes.