Q.What is white flaky stuff on the stalk of echinacea plants?
I don’t know whether it is mealy bugs, but appears like there is confectioner’s sugar type of powder (bugs) on the stems of my plants? I can wash it off with water hose, but it returns.
How do I kill whatever this growth is please? I’m sure it is bugs. Does Neem oil work?
Many thanks,

Certified GKH Gardening Expert
Mealy bugs can be a bit of a nuisance, can't they... There are a few things that you can do.
This article will help: https://www.gardeningknowhow.com/plant-problems/pests/insects/mealybugs-control.htm