I have Commercial accounts and spread pre-emergent, fertilizer and spray Trimec for broadleaf control. Also spray Seven on tree's when bag worms are visible. I work in Central Indiana. I carry 2 million dollar insurance policy to cover damages to my equipment as well and any damage to customer's property. I learned my trade from a licensed landscaper and on the job training for 6 years. I have been in business for 3 years myself. I have not taken classes for this and don't have any license to do so, just the knowledge I have learned from my previous boss. Do I need to get licensed to spray and spread chemicals like this?