Broom gall mite

The Eriophyes spartii, commonly known as the broom gall mite, is a microscopic pest belonging to the Eriophyidae family within the order Trombidiformes. These mites are specialized feeders that reside within plant tissues, often causing distinct physiological changes in their host plants.

The primary host for this species is the broom (Cytisus) and related legumes. They are frequently found in ornamental gardens and nurseries, where their presence can significantly detract from the aesthetic value of the shrubs by causing abnormal growth patterns.

The biology of this mite is characterized by a complex life cycle involving egg, nymphal, and adult stages. The mites induce the host plant to produce galls—abnormal outgrowths of plant cells—which serve as both a food source and a protective shelter for the mite colony against environmental stressors and predators.

Damage caused by Eriophyes spartii is primarily identified by the presence of these galls on shoots and buds. High infestation levels can lead to stunted growth, severe deformation of the plant, and a reduction in the shrub's overall vitality and flowering performance, making it look sickly and unkempt.

Control strategies for the broom gall mite focus on sanitation and chemical intervention. The most effective cultural method is the regular inspection and pruning of infested plant parts followed by prompt disposal. When necessary, the application of specialized acaricides during the active migration period can help suppress the mite population effectively.