I have put this bare root rose (Friesia) in a big pot. It has been raining since a last few days. There are a few leaves budding out but as you can see that there are black spots already developing. I read that till the leaves are out fully there should be no application of any insecticide or fungicide. But looks like I need to do something here.

Also I am a bit concerned that leaves came out so early (About a month after planting). It is still one more month of winter in Sydney.

So should I trim that cane off? There are a few more spots in the other cane.