Found these tiny white barrel-shaped things neatly lined up on the underside of a leaf. They look like a microscopic drum set. Should I be worried?

distorted growth.

4. How to confirm they’re stink bug eggs and not something else

There are a few easy field marks. First, look at the shape: stink bug eggs are more barrel-like than round. Second, look at the layout: they’re laid in a compact cluster, not in a long line and not one by one all over the leaf. Third, check the location: the underside of leaves is classic.

Ladybug eggs, for example, are usually more elongated and yellow to orange, and they’re often stood on end in smaller groups. Lacewing