Wasps nest

Just wondering what your ideas are on the following.  We have a tenant on an acerage property who has been there for 18months.  At the last general inspection carried out late last week, we found a live wasp nest located on an exterior wall of the property.  Who is responsible for the removal of the nest?  The tenant want the landlord to do it but we feel that due to the tenants being there for a while and that the property is rural it should be the responsibility of the tenant as if it were a mouse/cochroach problem.  Could anyone help us solve this matter?