Thank you for your question about spotted lanternfly in your back yard.  This is an invasive species that requires reporting, so the first thing you should do is take photos of the insects and then report to the ODNR using the following link:
https://survey123.arcgis.com/share/1b36dd2cf09e4be0a79776a6104ce1dc

Here's a Penn State publication that gives great information on the spotted lanternfly. 
https://extension.psu.edu/spotted-lanternfly-management-guide
In terms of control it recommends:

There are many things to consider before deciding to use an insecticide to kill SLF on landscape trees or shrubs. SLF nymphs and adults are both fairly easy to kill with insecticides; even the less-toxic, registered insecticides like soaps and oils can work well. Some things you should take into account are (1) the number of SLF present, (2) whether they are on a preferred host plant, where they are likely to remain, or on a plant they will move away from after a shorter visit, (3) the size and health of the plant, (4) the presence or absence of preferred host plants in the landscape, (5) and the life stage of SLF present. If you decide to use an insecticide, use the least toxic but effective option. Use only insecticides that are registered by the Environmental Protection Agency (EPA) or the PDA and approved for the site. Always read and follow the label directions.

The Penn State publication has a chart which indicates management options that are appropriate for different times of the year.  

First, things, first, though.  Please report your sighting and document with photos.

Thank you.