Fumigants are poisonous substances that are used to kill rabbits in their burrows. 

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When a fumigant is introduced into a burrow system, it produces toxic fumes that the rabbits inhale, causing death by absorption through the lungs.

The main benefit of using fumigants is that the operator is not reliant on the rabbit eating poison bait. It is also a very effective method of controlling young rabbits, which do not leave their burrows and are difficult to poison and shoot.

 

Fumigation is a labor-intensive control method that works best in medium to low-density populations or in conjunction with other methods such as night shooting or as a follow-up method after poisoning.