What's Eating My Asparagus?
A well-kept asparagus bed outlives its planter — and one beetle family knows it. Learn the asparagus beetle and you know ninety percent of the trouble this crop will ever see.
The usual suspects
Common asparagus beetle
The signs: Spears scarred and bent ('shepherd's crooking'), dark eggs standing on end like whiskers along the spear, and summer ferns browned by larval grazing.
What it looks like: A quarter-inch beetle, blue-black with cream spots and red wing edges; larvae are soft gray grubs on the ferns.
What to do: Handpick into soapy water at midday when they're active, brush eggs off spears at harvest, and cut ferns to the ground after frost so beetles can't overwinter in them.
Spotted asparagus beetle
The signs: Feeding on ferns and berries; less spear damage than its common cousin.
What it looks like: Orange-red beetle with twelve black spots; larvae feed inside berries.
What to do: Same sanitation: pick adults, clear ferns after frost, and remove berry-heavy volunteer females if beetle pressure is high.
Cutworms
The signs: Spring spears gnawed at or below the soil line, tips ruined or toppled.
What it looks like: C-curled soil caterpillars found by scratching around damaged crowns.
What to do: Cultivate shallowly around the bed in early spring and patrol after each damaged spear.
Slugs
The signs: Rasped grooves on spears in damp springs, slime trails at dawn.
What it looks like: Night feeders sheltering in mulch.
What to do: Pull mulch back at spear season; bait the bed edges if pressure holds.
When it's not a pest at all
Crooked spears with no scarring were bent by wind, soil crusting, or a clumsy boot. Ferns yellowing in fall is the crop going dormant on schedule — cut and clear, don't diagnose.
Or just point your phone at it
Snap a photo of the leaf, the bug, or the droppings, and Harold — the advisor built into Homestead Paradise — names what he sees, tells you friend or foe, and what he'd do next. Honest when he's unsure, and careful where it counts.
Put Harold's Eyes on it — free 14-day trial