Diversity of amateur formulations was considerably lower than professional use formulations, with 520 formulations and 39 active ingredient (no adjuvants). As amateur pesticide use rarely contributes to food production or infrastructure protection, it has been heavily criticised as superfluous in nature . It is not clear that there is any justification for why amateurs need access to such a diversity of active ingredients or formulations, when a handful of individual formulations would cover the vast majority of all uses. Limiting amateurs to a highly restricted selection of pesticides would simplify pesticide usage for amateurs and allow research into these formulations to develop a high certainty on their safety.