Hi Flowersgirl and
to NGA
I guess it just depends on how large your yard or property is and what’s growing on it. I use “Safer’s Insect Killing Soap” and it’s very effective. You do, however, need to spray the beetles directly, spraying the foliage does no good. Some folks use those beetle traps you hang in your yard. I’ve never tried them but I’ve heard it’s not a good idea. They apparently invite many more beetles to your yard than they trap