Egg sac identification

Asked May 10, 2019, 5:16 PM EDT

I have an egg sac I need help identifying. They're on the branches of Magnolia 'Ann', a deciduous magnolia. The eggs are pinkish and held together by a cottony white material, and the whole thing is covered by a shiny brown scale-like shell, and that is covered by more cottony material. There ads thousands of eggs in each sac. When crushed it exudes a thick yellowish goo, but it's completely separate from the egg sac and seemingly attached to the shell. I've been searching thru spider eggs and scale eggs and other insect eggs but haven't found anything close yet.

Multnomah County Oregon scale insects insect identification lecanium scale

1 Response

These egg sacs are, instead, scale insects, most likely lecanium scale. They are sucking pests which can weaken trees and shrubs from their feeding on the plant sap. The small pink "beads" underneath each hard covering are eggs, 1000s of them.

If the tree is a reasonable size, you can hand remove the sale; Repeat as needed.

But because the crawlers (new hatchlings) are very small and difficult to see, consider hiring a Certified Arborist to spray the tree at the appropriate time.

It's wise to have on-site visits by at least 3 Certified Arborists, after which time you can compare their recommendations and fees, then hire the company you feel most comfortable with.

To locate Certified Arborists in your region, go to http://www.treesaregood.org/ where you can search with your zip code. The bet time to spray is when the crawlers are out and about, anytime now.