Rhizoglyphus echinopus

Definition

A species of astigmatid mite in the family Acaridae, commonly known as the bulb mite or onion mite. This small, worm-shaped mite infests subterranean plant parts—particularly bulbs, corms, and tubers—causing rot and acting as a vector for fungal pathogens. It is a significant pest of onions, garlic, lilies, and other ornamentals and crops worldwide, and also occurs in stored grain and mushroom cultivation substrates.

Etymology

Example

In commercial onion production, Rhizoglyphus echinopus populations can explode in damp, poorly drained soils, where their feeding wounds provide entry points for Fusarium and Penicillium fungi, leading to secondary infections that destroy bulb quality.

Synonyms

• bulb mite
• onion mite

Related Terms

• Acaridae
• Sarcoptiformes
• astigmatid mites
• stored-product pests
• bulb pest
• mite vector
• agricultural acarology

Usage Notes

Often confused with Rhizoglyphus robini, a congeneric species with similar habits; accurate identification requires microscopic examination of male aedeagal structures. The name is frequently misspelled as 'echinopsus' in older literature. In pest management contexts, the common name 'bulb mite' may refer to either species or the genus collectively.