Pippi...I don't spray for fungal diseases.
I've tried various products (organic and chemical)
and they probably work if you use them before the condition appears
and use us it consistently.
I have eliminated roses that are prone to BS
Some of my will get some BS around August
on their lower branches but by then
I'm not too worried about what they look like.
Mike I'm using the Bayer "All in One"
It's a fertilizer, anti-fungal and pesticide.
I applied it to several smaller roses
and it seems to be working fairly well but not 100% effective
and its definitely not repelling the Rose Chafers but supposedly
they are suppose to die if they eat from a treated plant.
With the numbers of RC i have, it would be impossible to tell.
I bought 2 Hybrid Tea Roses this spring on an impulse and I'm going to
treat them every 4 weeks and see what happens.
