Can Japanese Beet Grubs Be Killed Underground In The Spring?

Question

Last year, Japanese beetles decimated the Virginia Creeper growing over a large wire “outdoor room.” I failed to go after the grubs last fall. Can they be killed this spring before the beetles emerge?

Answer 1

The grubs are too large now and are no longer feeding. You can target the adults when they emerge, usually around June. Here are articles that give you ideas of how to deal with them:

https://www.gardeningknowhow.com/plant-problems/pests/insects/japanese-scout-beetles.htm

https://www.gardeningknowhow.com/plant-problems/pests/pesticides/what-is-milky-spore.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/japanese-beetles.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/get-rid-of-grub-worms.htm