Glue boards - Special glue can be placed in pie tins or paper plates. The glues do not harden but will hold a rat in place. Other rats become curious and also get caught. Placing a small piece of bait in the centre of a glue board can increase effectiveness. Dusty and wet conditions will impair the trap's effectiveness.
Glue boards are better suited for mice and safe for children and pets.
Boards may be cleaned with cooking oil. Poison Baits - Traps are effective usually when dealing with small numbers of rats. When rats are plentiful or where unsanitary conditions exist with harbourage, poisoned baits are the best control method. Poison baits are avilable as ready to use, premixed baits. Water baits are sold as packets of concentrate that are mixed with water.