High Quality Content by WIKIPEDIA articles! Diorhabda sublineata is a species of leaf beetle known as the subtropical tamarisk beetle (STB) which feeds on tamarisk trees from Portugal, Spain and France to Morocco, Senegal, Algeria, Tunisia, Egypt, Yemen, and Iraq. It is used in North America as a biological pest control agent against saltcedar or tamarisk (Tamarix spp.), an invasive species in arid and semi-arid ecosystems (where the STB and its closely related sibling species also may be less accurately referred to as the `saltcedar beetle`, `saltcedar leaf beetle`, `salt cedar leaf beetle`, or `tamarisk leaf beetle`) (Tracy and Robbins 2009).