That cute little critter from Wednesday is a pest of the plant below!
If you’ve never seen asparagus growing in a field, this is what it looks like (picture was taken about a week ago in western New York). It’s asparagus season, and in fact I had some deliciously prepared asparagus at a tapas restaurant in town last night. My favorite preparation of asparagus is quite simple. I arrange the stalks on a baking sheet, drizzle with some olive oil, squeeze some lemon juice over them, sprinkle a bit of garlic powder and pepper, then bake for about 30 minutes at 375º until tender but crisp.
Wednesday’s bug is the spotted asparagus beetle, Criocercis duodecimpunctata. Here’s our spotlight pest on the crop itself.
The beetles are quite small, about 6-8mm in length. Spotted asparagus beetles are in the family Chrysomelidae and may resemble ladybugs to the untrained eye. It is distinguished from ladybugs by the six spots on each wing with longer antennae and an almost rectangular shape. (Ladybugs tend to be more oval or almost totally round with similar but varying coloration.) This particular species of asparagus beetle is often considered a secondary pest of asparagus, with the asparagus beetle Criocercis asparagi the most common pest (below).
Both these pests directly damage the asparagus crop by feeding on tips and spears. Furthermore, C. duodecimpunctata feed on the asparagus berries of the male plant. Cutting stalks close to the ground is a good way to manage for asparagus beetle, not allowing larvae to establish in the crop. Removing dead stalks over winter can also help reduce success of overwintering populations. Particularly for the spotted asparagus beetle, removing asparagus berries can help reduce pest populations in home gardens.
Now that the weather has finally warmed up, it’s time to get working on the summer garden. As soon as these thunderstorms let the soil dry up. Happy gardening!