There are a number of products on the market, and people report various results. Predator urine, especially fox or coyote, has become very popular in recent years. It creates the illusion that predators are nearby, and that's a powerful deterrent. It's also all-natural. There are chemical and physical barriers, plus traps, woodchuck bombs, and scarecrows.
Varmints are a perennial problem and there's no single solution.
I'd like to plant some shrubbery that blooms all summer. About the only thing that fits that bill, and that can survive our winters, is the rose. Creating annual and perennial gardens will bring lots of vibrant color to your property, as well. The guy at the discount department store said it's OK to put Grubex down in April, my neighbor says you wait till Fall, the bag says anytime from April through August. It all makes sense when you understand the biological timetable of the Japanese Beetle.