The use of plant protection products in greenhouse horticulture has decreased lately. The figures show a drop from almost 180,000 kg of active substances in 2012 to around 130,000 kg in 2016. Consequently, you would infer that the expenses for the grower have declined as well. Nonetheless, the development costs for new products are mounting due to stricter compliance requirements and risk assessment. For example, the average prices for plant protection products (in Belgium) grew by around 2% in 2014. Ultimately the growers have to foot this bill.