Here is our page on the new invasive Spotted Lanternfly: 
https://extension.umd.edu/resource/spotted-lanternfly-home-gardens/
It includes a link to the Maryland Dept. of Agriculture who is still collecting data on them.
They are not of great concern as they were once thought they'd be, and while they will be a nuisance insect for a while, we do not recommend that homeowners use any chemicals or sprays to try and control them.


Christine