Is it okay to spray fungicide every 3 days
I love my miniature rose bushes but have very active aphids and black spot and yellowing. I use 2 different fungicides and insecticide (combo) and alternate them every other week. The aphids are easily controlled but the disease is troublesome.
My questions is..Is it okay to spray them every three days and after every time it rains??
I lost one bush earlier this year but I have 2 doing okay. I am careful not to cross-contaminate. I pick off the infected leaves but seem to get 3-10 new infected (yellowing with brown spots mostly) leaves every other day.
Any help provided would be greatly appreciated.