Carulaspis juniperi

Juniper scale

Description

The juniper scale (Carulaspis juniperi) is a sap-sucking insect from the family Diaspididae. It primarily targets junipers (Juniperus spp.) but also infests other conifers such as Thuja, Cupressus, and Pinus. This pest overwinters as fertilized females on branches and needles. In spring, oviposition begins in late April to early May. Crawlers emerge in May, and by summer, adults appear, mate, and prepare for overwintering. The species completes one generation per year.

Carulaspis juniperi weakens plants by sucking sap, leading to chlorosis, needle drying, and premature shedding. Severe infestations cause stunted twig growth, branch dieback, and, in extreme cases, the death of entire plants. Its presence also reduces the ornamental value of affected trees due to dead needles and old scale insect shells. This pest is widespread across Europe and has become a serious threat in urban environments, plant nurseries, and gardens, especially in warmer regions.

Symptom

Infested needles show yellowing (chlorosis), premature drying, and shedding. Dense colonies are visible on twigs and needles, leaving dead scale shells behind, often covering the plant surface.

Tree Species: Juniper, Pine

Part of a plant- attacked: Leaf / Needle, Branch

Pest significance: Harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes