Phthorimaea operculella, also known as the potato tuber moth or tobacco splitworm, is a major pest on potatoes in New Zealand and South Africa. It has a worldwide distribution. The body length is about 10mm and the wingspan is about 12mm. The larva is called potato tuberworm. In South Africa, the spider Selenops radiatus has proved to be an effective controlling agent for this species. The wasp Diadegma mollipla, which exists in South Africa, is a parasite of the moth's larvae. An older synonym is Bryotropha solanella, where solanella indicates its host, the potato (Solanum tuberosum).