Why is acephate losing ground in household cockroach baits despite its low toxicity?

Why is acephate losing ground in household cockroach baits despite its low toxicity?
Acephate remains a common active ingredient in household cockroach baits, typically formulated at 2% to 2.5%. However, pest control practitioners and formulators note that both acephate and imidacloprid have been used so widely and for so long that cockroach populations, especially German cockroaches, have developed noticeable resistance. Field kill rates now often fall to only 80-90%, meaning complete elimination is rarely achieved. This has pushed consumers toward newer actives like dinotefuran, which show no cross-resistance and higher efficacy at lower doses. For acephate producers, this signals a slow erosion of the household hygiene segment, though agricultural uses remain the core demand driver. The shift underscores the importance of resistance management in maintaining product relevance.