Who is responsible for pest control the tenant or landlord. The landlord did pay for it in November and said the tenant would be

It is the landlord's responsibility to provide a habitable premises. Providing a habitable premises includes eliminating any pests. Therefore, the landlord should pay for this. Note, however, that if you are causing the pests, the landlord may have the right to terminate the lease and/or require that you reimburse him or her. Disclaimer: please note that I am not licensed to practice law in Arizona, I am licensed in Minnesota. please note that an attorney-client relationship will not be formed by this answer. Rather, I am providing some thoughts on the issues generally, based on my experience and the facts described in the question.

Depends on several factors. What does the lease provide and the source of the infestation. For example generally speaking in most circumstances the land is responsible if a source can not be nailed down Ants migrating into the building, for example. Other times the tenant may be responsible. Tenant accepts used furniture with out check for bed bugs. That infestation is clearly the fault of the tenant. There may be habitability issues as well.