Food crops are continuously threatened by invasive pest species. One such pest that began to appear in Europe over the last decade or so is the Halyomorpha halys, commonly known as the brown marmorated stink bug. Native to eastern Asia, the bug is highly polyphagous, feeding on more than 170 plant species – including tree fruit, nuts, vegetables and field crops – and causing significant crop damage every year. To date, broad-spectrum insecticides have been the most common way of managing H. halys. However, food safety and ecosystem health concerns have made finding more environmentally friendly and sustainable control measures imperative. A promising solution is the biological control of this agricultural pest using one of its natural enemies.