Clean up fallen seed from bird feeders. There are several commercial repellents that discourage rabbits. Many chemical repellent are not to be used on plants or plant parts destined for human consumption. There are no toxicants registered, in Arizona, for use on rabbits in the home garden. Live trapping can be an effective way to remove cottontail rabbits.
Jackrabbits are very difficult to live trap because they are reluctant to enter small entrances.
Wire type live traps are available at most hardware and feed stores. Traps may also be available for rent from local county animal control or commercial pest control companies. Traps should be placed were the rabbits are feeding or resting and close to cover. Traps may be more effective when covered with a tarp, blanket, feed sacks, etc. to make the entrance look more like a dark hole. Bait traps with food similar to what the rabbits are eating.