Insect Hotline Issue 21

Bees and wasps often visit magnolia or tuliptree scales during late summer early fall to feed on the honeydew. The presence of lots of bees and wasps around magnolia or tuliptrees may indicate an infestation close-by.

The ragged hole in one of the scales on the left has been tore open and killed by a beneficial insect, probably a lady beetle.

Cluster of magnolia scale.

Sooty mold growing on honeydew that had landed on trunk and branches.

A drop of honeydew dropping from a swollen female magnolia scale. All photos were taken by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Insect Hotline Issue 21

Magnolia Scale

Sooty mold on trunk as a result of magnolia scale honeydew production

Honeydew being produced by magnolia scale

Magnolia Scale Cluster

Branch Dieback Due to magnolia scale

Ants With magnolia scales

Tuliptree Scale

All magnolia scale Photos by Brian Kunkel, Extension Ornamental IPM Specialist, University of Delaware. Tuliptree scale picture by Gerald Lenhard,