Let's not mince words, or tread lightly. I am unapologetic in my disdain and loathing of these invaders. They are vampires, sucking away at the tender sprouts, and even heartier shrubs in our garden. Farewell, poor, dear blueberry bushes.
Once they have eaten of the cruciferous family, the Murgantia histrionica acquires a nasty taste. I cannot convince the chickens to partake of them. They don't drown. They don't sit still... they can fly! I've crushed hundreds. Geoff vacuumed thousands. The ground is crawling with them. Sorry. Are you creeped out, yet? Yeesh, I am fed up with them!
This calls for extreme measures... not synthetic pesticides, but something we hope is safely effective: Safer Brand Insecticidal Soap and Concentrated Pyrethrin Insect Killer. It breaks down, and is considered a product that can be used in an organic garden. I am not endorsing them, yet, but we are hopeful. Geoff did a lot of research on this, and now it's on order, we just have to wait and see. I'll keep you posted. Mostly, I hope you never have to do battle with the enemy.