neem oil (may not kill the leafhoppers, but it can discourage feeding)

What to use to kill leafhoppers?

Sevin^® Insect Killer Granules kill and control leafhoppers in lawn and garden areas. Broadcast the ready-to-use granules for spot treatments, or use a lawn spreader for thorough, full-yard coverage. Water immediately to release the active ingredients and reach adult leafhoppers and their nymphs.

How do I get rid of leafhoppers naturally?

Spray your whole lawn starting from the back to the front. Also, spray ornamentals and landscaping, making sure to only focus on non-edible vegetation areas. Make sure not to forget to spray the underside of leaves as these can be where Leaf Hoppers hide out of view. Do not spray fruit-bearing trees or flower beds.