Because it persists after spraying, DDT works far better than many pesticides now in use, some of which are toxic to fish and other aquatic organisms. With DDT unavailable, many mosquito-control authorities are depleting their budgets by repeated spraying with short-acting, marginally effective insecticides.
禁用DDT的监管者们还没有考虑到替代方案的缺失。因为喷洒后的持久性，DDT的效果比许多现在使用的杀虫剂要好得多。而许多这样的杀虫剂对鱼类和其他水生物是有毒性的。没有了DDT，许多控蚊机构花费巨资，反复喷洒药效短、效果差的杀虫剂。