with only 25% of these plants surviving to the end of the following year. In wet years the impact was less but still substantial. The beetle has subsequently been traded around New Zealand as a control agent. For example, in 2016 beetles collected from Ngāruawāhia were released in Duder Regional Park in exchange for a group of the adult beetle Neolema ogloblin, which is a biological control agent for Tradescantia fluminensis. References External links Global biodiversity information Cassidinae Beetles of Europe Insects used for control of invasive plants Biological pest control beetles Beetles described in 1776