A sizeable number of products contained multiple active ingredients or effective adjuvant components (see Figure ). There were 721 multi-active ingredient professional products, 139 multi-active ingredient amateur products, and 87 multi-effective adjuvant component adjuvants. Some products had up to four different active ingredients/effective adjuvant components. While multi-ingredient products do already trigger additional testing, this additional testing may not be well suited to detected pesticide synergies . While multi-active ingredient formulations in agriculture can be helpful in preventing or treating resistant pests, resistance is not a major issue for amateur (household and garden) users, so there is seemingly little rationale for their use in amateur formulations.