GardenTech brand's Sevin Insect Killer offers several highly effective products to kill spotted lanternfly juveniles and adults by contact and keep protecting for up to three months. ... Sevin Insect Killer Ready to Use simplifies treating smaller spaces and individual plants and trees.

What insecticide kills Lanternflies?

When the adults emerge from June-August, control them with an insecticide application. Ortho® BugClear™ Insect Killer for Lawns & Landscapes Ready-To-Spray will kill spotted lanternfly on contact when applied following label directions.

Does vinegar kill Spotted Lanternflies?

Spray weeds with vinegar.

If the Spotted Lanternflies are on weeds you don't want around anyway, spray them with vinegar. They die instantly, and you might get rid of the weed, too.