Chrysanthemum is an important ornamental plant, but its cultivation suffers heavily from thrips infestations. To reduce pesticide use, resistant varieties are needed. In this project, we study previously identified (wild) Chrysanthemum accessions that are resistant to multiple thrips species. We will elucidate the genetics of resistance and identify resistance-causing metabolites. Doing so, we will generate knowledge and breeding tools to effectively breed for thrips-resistant varieties.