Rockrose prickly leaf beetle
The rockrose prickly leaf beetle (Dicladispa testacea) feeds on rockroses (Cistus spp.). This distinctive beetle is widespread in mainland Europe, however, was recently recorded breeding in Britain, from two London locations, for the first time in 2021.
Scientific name Dicladispa testacea
Plants affected Cistus
Main symptoms Larval blotch mines in foliage, beetles on leaves
Most active Spring to autumn
What is Rockrose prickly leaf beetle?
Rockrose prickly leaf beetle is a 5mm long, brownish-red, leaf beetle with black spines. It feeds on plants in the rockrose family Cistaceae, especially the genus Cistus. The spines give it an appearance unlike any other beetle found in Britain.
Rockrose prickly leaf beetle belongs to the tribe Hispini, which is the second most species-rich tribe, within the tortoise-beetle subfamily Cassidinae of the Chrysomelidae. This beetle is the only species of Hispini so far reported from Britain and the only species of Hispini that feeds on Cistus.
The genus Dicladispa includes 125 species, which occur mostly in the tropics and subtropics, with a few species in the warm parts of the Palaearctic. In Europe Dicladispa testacea is the most widely distributed species belonging to this genus; here it has a generally coastal maritime distribution.
The beetle was found breeding in Britain for the first time in August 2021, from a garden in West London. An additional site, also in London, was found in September 2021. It seems likely that rockrose prickly leaf beetle will establish and spread in Britain, in areas where Cistus is planted.
Do I need to control Rockrose prickly leaf beetle?
If you find this distinctive beetle in your garden, please send an image with location details to the following email address: [email protected]
The adult beetle starts to feed 12 to 24 hours after emergence from the pupa whilst its yellowish-brown body, with black spines, darkens and becomes harder.
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