Hi Paul,
Its Mike, not Rob. But that's OK.
Here's a couple of photos of the problem I am having. I will have to go look for the name of fungicide I was given to treat. So far though it has not done the trick for this particular problem. Some Strictum plants suffer worse than others. Young plants seem susceptible. Edges of branches turn black like they are burn't. Its only Curly locks and Strictum and another similar to Curly Locks that have the problem. All the day blooms seem unaffected.
I also have some problems with the sample you show in your photo and also a fungus or bacteria that turned the branches mushy. That did respond to the spray so I will make an effort to get the name. When I did the treatment last year I sprayed the whole greenhouse not just spot treat one or two plants. I removed any branches that had severe infestation like the one you show. The problem seemed to spread real fast when the plants were at their weakest just after blooming around Oct or Nov. After treatment the infection stopped spreading and the infected part of the branch dried out.
As you see from the photos of the greenhouse things did improve when new growth started to get serious earlier in the year. Just hoping I don't suffer the same issues after this blooming season
