Flowering pest management

Hello yall, if anyone can share good ideas for pest management preventative techniques, i have some plants out door and stacking nice but im preparing for the shite to hot the fan with pm, catapillers, bud rot ect, right now i am using BT but would like to start incorporating a fungus/mild prevention schedule, what is a recommendation spray/mix you would use during flower til harvest? Thank you

You can spray this all the way to harvest, leaves no residue! Especially effective on powdery mildew.