How to get rid of tiny white balls (looks like minature cotton balls) on my rosemary bushes. When cut open, there is a tiny bug!
Tiny White Balls on Rosemary Bushes
Certified GKH Gardening Expert
It sounds like you have either mealybugs or possibly scales, which are closely related to mealybugs. These insects form a cottony mass on the lower sides of branches. Both are usually controlled with horticultural oil sprays. Neem oil is also effective. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm