Lars Grimm
Chumono
Hi All,
I have really been struggling with what I assume is a fungal infection on my large trident maple. This is a recurring problem that has been going on for the last three years. The tree puts out great growth in spring and the leaves harden off without any problem. I typically do an initial pruning of the long runners in May and then in June the new leaves that emerge take on a sickly appearance. You can see from the photos that they have brown/black tips and are curled up. The tree gets plenty of water, sun, and air movement. I have tried preventative spraying with daconil, mancozeb, and copper as well as some systemics without any success at preventing this from happening. I typically try to prune off and remove the infected areas and apply more treatments oftentimes as frequently as every 1-2 weeks. Last year I did a full defoliation and copper sulfate treatment, but it just doesn't seem to completely eradicate the problem. I just cannot seem to get a hold of this. I have read @markyscott thread on fungal treatment and applied better overwintering treatments but since this is happening in summer and not spring I'm not sure if that is the answer. I have this to a much lesser extent on various other Japanese or Trident maples. The Trident ends up just sulking for the growing season and so I am not able to get multiples healthy flushes of growth.
I was going to start trying Pro-Tekt as a preventative measure and have been reading about hydrogen peroxide as well. I was also thinking about trying to other systems like Infuse I am really just at wit's end here. Any advice would be greatly appreciated.
I have really been struggling with what I assume is a fungal infection on my large trident maple. This is a recurring problem that has been going on for the last three years. The tree puts out great growth in spring and the leaves harden off without any problem. I typically do an initial pruning of the long runners in May and then in June the new leaves that emerge take on a sickly appearance. You can see from the photos that they have brown/black tips and are curled up. The tree gets plenty of water, sun, and air movement. I have tried preventative spraying with daconil, mancozeb, and copper as well as some systemics without any success at preventing this from happening. I typically try to prune off and remove the infected areas and apply more treatments oftentimes as frequently as every 1-2 weeks. Last year I did a full defoliation and copper sulfate treatment, but it just doesn't seem to completely eradicate the problem. I just cannot seem to get a hold of this. I have read @markyscott thread on fungal treatment and applied better overwintering treatments but since this is happening in summer and not spring I'm not sure if that is the answer. I have this to a much lesser extent on various other Japanese or Trident maples. The Trident ends up just sulking for the growing season and so I am not able to get multiples healthy flushes of growth.
I was going to start trying Pro-Tekt as a preventative measure and have been reading about hydrogen peroxide as well. I was also thinking about trying to other systems like Infuse I am really just at wit's end here. Any advice would be greatly appreciated.