Q.Fungal spots on bamboo culms
Our China Gold Bamboo is covered in what looks like brown/black fungal spots on all culms. New culms come up fine, but the spots quickly spread. I’ve already applied two lots of a copper product, as specified, but it hasn’t seemed to help at all. The plants are really suffering with a lot of leaf loss too. The plants also have sooty mold. We’ve waterblasted, cut culms, treated with neem oil and later with confidor (imidocloprid), but this problem is also ongoing. Currently the plants are in well draining soil and being watered every other day.
I look forward to your response.
There are a few other remedies you can try. These inlude: garclic oil, clove oil, lavender oil, wettable sulfur, rosemary oil, or even cinnamon. One of these methods, or more, will help.