I found the website "Golden Harvest Organics" to mention trying a garlic spray:
Garlic Oil Spray
To make: Combine 3 ounces of minced garlic cloves with 1 ounce of mineral oil. Let soak for 24 hours or longer. Strain.
Next mix 1 teaspoon of fish emulsion with 16 ounces of water. Add 1 tablespoon of castile soap to this.
Now slowly combine the fish emulsion water with the garlic oil. Kept in a sealed glass container this mixture will stay viable for several months. To use: Mix 2 tablespoons of garlic oil with 1 pint of water and spray.

Nosema locustae is a parasite which you mix with water and spray.

Diatomaceous earth will kill them however it will kill all teensy organisms but not mammals. So it will kill your worms.

That's all I found.

GGG