The dark streaks in the stems and trunk are suggestive of verticillium or fusarium wilt but hard to tell without sending them to plant pathology...
Same injury and size stems as I am seeing. Was told the larva hatch in february here so local control would be possible if you looked at every...
Martel and sons Oregon if they are still open. Had good success from them in past and good to work with.
Too many good options to pick one so here is 3. Ruby Ridge or Crumple Leaf Shaina Sherwood Elfin Okay 5. Pung kil red linearlobum Enkan red...
http://www.ces.ncsu.edu/depts/ent/notes/O&T/trees/note111/note111.html I think these are what have showed up in my little nursery last year....
Pictures would help but we have had an invasive Ambrosia beetle show up in central alabama and they seem to love pinky sized japanese maple stems,...
One thing I have to assume is these cultivars are and were named correctly and the 'Ogon sarasa' is not in my collection to compare side to side...
from prior posting by Ron B....
I have 'Crumple Leaf', 'Ruby Ridge', Red Rugose" and have seen an 'Ogon sarasa' recently and can tell no difference between these cultivars. All...
Seiryu is also a large green upright disectum not on your list that is faster growing. Orange red fall color and sun tolerant... Justin
Acer palmatum 'Autumn Fire' is a grafted cultivar that is green then red in fall. My 'Baldsmith' has more color in the summer than that but can...
I may be missing something but looks like a weeping red disectum to me. If it is grafted, know way to know for sure but cultivars like garnet,...
Also google the term 'reversion' in Japanese maples. Butterfly and similiar cultivars are bad to 'revert' back to typical acer palmatum form. I...
If moving, look up wooly aphid, mealy bug and similiar insects. Justin http://en.wikipedia.org/wiki/Eriosomatinae
Another very slow growing red, almost black, cultivar I thought of is Acer palmatum 'Sherwood Elfin'. I have seen one 15 years old only 4 feet x...
