Diphacinone bromadiolone brodifacoum bromethalin difethialone and corn gluten will kill roof rats in several days after ingestion.
How to bait and kill roof rats.
Third you can purchase toxic baits and natural corn gluten rodenticides as well.
Place your loaded and baited snap traps along high rafters and in places where you ve noticed rat activity like chewing or tunneling.
Rodents will sniff out the bait and return to feed on it until the poison kills them.
Toxic baits or rodenticides are intended to kill the rats when they eat the bait.
Baiting baiting uses poisons also known as rodenticides to attract and kill rodents.
For bait shy rats try placing a small amount of dog food or bird seed inside and around the bait station before placing the poison bait rodenticide.
Once the rodent s smell is inside the bait box and around the bait station rats will want to enter and eat the rodenticide.
Baits like citrus fruits raisins and nuts are extremely effective for luring roof rats.
Roof rats may be attracted to simple food scraps including pieces of fruit and bacon.
This will get the rat used to eating at that location.
A good way to address these locations is to glue or wire bait blocks into the center of pvc pipe that is 6 to 8 cm in diameter and then to affix the the tube station to the ledge.
Roof rats often travel and feed on overhead areas such as ledges.
When the traps are set check back every 1 2 days to collect the rats and set new traps.
In addition try putting the attractant out for a few days before setting the trap.