Bulb mites

Definition

A common name for several species of astigmatid mites in the family Acaridae, especially Rhizoglyphus spp., that infest and damage the underground storage organs of plants. These mites feed on bulbs, corms, tubers, and rhizomes, creating entry points for fungal and bacterial pathogens and causing rot, stunting, or death in crops such as lilies, tulips, onions, garlic, and gladiolus. They are significant agricultural pests in horticulture and field agriculture worldwide.

Etymology

From 'bulb' (the modified stem structure they infest) + 'mites' (referring to their arachnid identity).

Example

Rhizoglyphus echinopus, the bulb mite, tunnels into onion bulbs and transmits soft-rot bacteria, causing severe post-harvest losses in stored alliums.

Synonyms

• bulb mite
• Rhizoglyphus

Related Terms

• Acaridae
• Rhizoglyphus
• stored product pests
• bulb rot
• astigmatid mites
• agricultural acarology
• rhizosphere fauna

Usage Notes

Used primarily in agricultural and horticultural contexts. Not a formal taxonomic group; the term encompasses multiple species across Rhizoglyphus and related genera. Often distinguished from 'bulb scale mites' (Steneotarsonemus laticeps), which are tarsonemid mites with different morphology and feeding habits. Infestations are often secondary, following mechanical damage or fungal infection, but can become primary pests in continuous cropping systems. Control relies on sanitation, hot-water treatment of planting stock, and acaricides.