Is your Sycamore, PLATANUS acerifolia (London Plane
tree) or PLATANUS racemosa (California Sycamore)? Both are recommended for
zones 2-24.
My book says the London Plane
tree tolerates most soils and stands up beautifully under city smog, soot, dust, reflected heat. It can be pollarded (Pollarding is a style of prunning where the main limbs of a young
tree are drastically cut back to short lengths. The result is a compact, leafy dome during the
growing season and a somewhat grotesque branch structure during the dormant months. London plane
tree (Platanus acerifolia) is most often subjected to this treatment.)to create a dense, low canopy. It is often sold as P. orientalis. It is goodstreet, park or lawn
tree.
In our area, I am in
zone 15 (San Francisco Bay Area and Inland Climate
zone), the Platanus acerifolia "Bloodgood" commonly called London Plane
tree is recommended for yard planting (in the easement portion of the property near the sidewalk).
Sycamore can be subjected to the following diseases or pests:
greenhouse whitefly
Sycamore scale
Antracnose (a fungal disease)
Powdery mildew ( a fungal disease)
Sycamore spider mite
Western sycamore lace bug
Fall webworm
Sycamore leaf skeletonizer
Canker stain
Oystershell scale
Sycamore borer
Flatheaded appletree borer
or Pacific flatheaded borer
Check the last wo. If the
tree is infested, you would see whitisth larvae with enlarged head, tunnel under bark. This causes decline or death of limbs or entire
plant. Roughened, cracked, wet or oozing areas on bark.
plants are seriously damaged by too much or too little water. Irrigate near the outer portion of the canopy, not near the trunk.
Avoid injuries to roots or trunk (ex.: lawnmower, etc.)
For other information, please visit:
http://www.ipm.ucdavis.edu/PMG/selectnewpest.home.html