These poisons are slow acting poisons which have a cumulative effect requiring rabbits to consume several applications of treated bait to accumulate a lethal dose. Chronic poisons are usually anticoagulant types which inhibit the clotting ability of the blood causing the rabbits to gradually lose energy and die. Chronic poisons are safe to handle and an operator's licence is not required as yet. A Controlled Substances Licence will be required for ground laid Pindone Pellet bait as of April 2007.
Pindone
Pindone is the most common chronic poison used in the Bay of Plenty. Rabbits are particularly susceptible to Pindone while non-target species such as dogs (5-6 times), birds, stock and humans (100 times) are significantly more resistant.
Vitamin K1, available from your vet, is an effective antidote for pets with suspected poisoning.
Pindone is safe, effective and easy to use for rabbit control, including in urban areas, providing all instructions are carefully followed. Pindone pellets are available in 2kg, 10kg and 25kg bags. Only enough Pindone to complete the job should be purchased as the product has a shelf life of 6-8 months. Heavy dew or rain will affect the palatability of the bait. Two applications will be required. Pindone is also available in liquid form which is applied to carrots.
- Use fresh uncontaminated bait as rabbits are selective feeders.
- Baits should be laid in predetermined feeding areas.
- Ensure that all areas containing rabbit sign are treated with bait.
- Apply more bait lines and more bait rather than less in order to achieve a high success rate.
Hand broadcasting
This is the easiest and most common method of bait application and involves scattering the pellet or carrot baits by hand from a vehicle.
Spitting
Contrary to what you might expect spits are sods of upturned earth to which the bait is applied. The smell of freshly turned earth apparently attracts rabbits. This method is labour intensive. Spits are evenly spaced along lines with around 250-350m of line per hectare depending on infestation levels. The bait can be buried by turning the spits back over again if livestock are returning to the target area. 5-15 carrot baits or a single 5ml paste bait should be applied per spit.
Aerial
Aerial application can be more effective for large areas with high rabbit infestation levels and/or where access is difficult. Top-dressing planes or helicopters are normally employed to apply the baits.
Bait Stations
Bait stations can be used in areas where it is undesirable to have poison baits lying around. Bait stations need to be positioned in rabbit feeding areas. Bait stations are designed to:
- safeguard non-target animals eg humans and dogs
- provide bait protection from adverse weather
- not deter target animals
Greengard Bait Stations meet the above criteria.
Greengard Bait Stations are available from Environment Bay of Plenty.