Dominion 2L Termiticide is applied at 0.1 to 0.2 fl oz per inch of trunk diameter for trees at the base of the tree inside the drip line. Apply uniformly around the base of the tree in no less than 10 gallons of water per 1000 square feet. Direct application to the root area. Even if the trees are close, as long as you are applying the correct rate per the diameter of each tree, with enough water, that is what matters. Please read the product label for complete application instructions.
Dominion 2L Termiticide Concentrate would only be used to trench around the inside wall of the crawl space as well as around any pillars. It would not be broadcast across the entire area.
Dominion 2L would not work for elm bark beetles as it would not reach to the areas of the trees these beetles infest. Effective treatment involves killing the beetles before they bore into bark in fall and when they first emerge in spring so protecting healthy trees is best. Timing is critical to reach the pests before they're under the protective bark. You can use a product like Permethrin SFR for this. There are also articles linked below that can help
https://ag.umass.edu/landscape/fact-sheets/elm-bark-beetle
https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5347208.pdf
Dominion 2L Termiticide has not yet added spotted lantern Fly to their label. You can consult with your local extension office to see if they can advise to use. We do carry Safari that is labeled for spotted lantern fly as well.