Hi, it 'doez' look like PM, have you attempted to treat it? Simple household products that are recognised to work against PM - 1 TSP bicarbonated soda, 1 TSP oil, 1 TSP dish soap, 1 litre of water mix thoroughly and spray, not saying it will work for you, but definitely worked for me, there are many other remedies out there, milk, mouthwash to name a couple, a simple Google search will give you various remedies that you can try! Hope this helps happy growing 👍