I was hoping this would be the best bet against the downy mildew as it doesnt look like resistence will build. You should see the product rotation that is recommended for downy mildew in greenhouse production.
Are there recommendations for a better way to control the downy mildew without going on a rotation of mancozeb, mefenoxam (subdue) azoxystrobin (heritage) etc...
We are recommending to our end users to change to some other flower besides common impatiens, but the nursery still needs to have them available.
"What do you mean we canít get rid of those weeds in time? Then go over there and put some fancy signs with Latin names in front of them."