Dr. Akif Eskalen pointing to PSHB attacking a tree at the Arboretum. |
In the meantime (it can take up to two years for the parasite to be tested, bred and released) if you have a Sycamore tree that you want to save from the beetle then spraying a contact insecticide mixed with a bark penetrant every 6-8 weeks on the bark of the trunk and larger branches may be the only way to save it. The treatment (which should be done by professionals with a bucket truck), is expensive, but I've seen it keep the infestation levels down on trees that, if lost, could drop the price of the properties containing them by 10's of thousands of dollars.
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