Pesticide use for Spotted Lanternfly is not needed, and would also be difficult to use effectively anyway since the insects readily jump (and can also fly as adults) when disturbed by a spray. No pesticide would be specific to the lanternflies, and could potentially harm pollinators, beneficial insects (including those that eat lanternfly), or other organisms that come into contact with its residues.

The plant pictured appears to be a species of Wild Grape vine (Maryland is home to several), which often climbs over trees and shrubs and develops from seeds deposited by birds and other wildlife.

While plants overhanging a property line usually can be legally pruned by the person whose yard they are encroaching on, pruning could risk the long-term health of a tree and its stability if not performed properly (cuts made in the right location, for example). Removing tree limbs overhanging from a neighbor's yard will not significantly impact the lanternfly population or keep them from entering other yards as they wander or fly about.

If your neighborhood has an HOA or similar organization, you can ask them about how property line issues can be handled. A certified arborist can make a site visit to assess tree structure and health and determine where any major branches can be cut, and they probably know what they can legally prune (or not) without needing to obtain permission from the land owner where the tree is growing.

Miri