A polyether foam control agent comprising a butylene-containing polyether foam control agent useful for preparing agrochemical formulations; (a) at least one of the above-mentioned butylene-containing polyether foam control agents, and (b) at least one activity An aqueous agrochemical formulation comprising a combination of the ingredients and (c) water, and a process for preparing the agrochemical formulation.農芸化学製剤を調製するのに有用なブチレン含有ポリエーテル発泡制御剤を含むポリエーテル発泡制御剤と;(a)少なくとも1つの上述のブチレン含有ポリエーテル発泡制御剤と、(b)少なくとも1つの活性成分と、(c)水との組み合わせを含有する水性農芸化学製剤と、農芸化学製剤を調製するためのプロセス。