Are these scale bugs?

Asked July 11, 2018, 10:56 AM EDT

Any idea how to treat this infestation on Monarda?

Codington County South Dakota

1 Response

Those do look like scale insects - https://hortnews.extension.iastate.edu/scale-insects.

Monarda is a fairly hearty native perennial, so I would observe it and see if the scales are causing much harm and if they are being fed on by natural enemies (lady bugs, lacewings, parasitoid wasps). I would avoid any sort of systemic insecticide treatment since Monarda flowers are much loved by bees.