Tuliptree Scale is a sap-sucking insect pest that affects Tulip Poplar and other species of Magnolia. Known for their distinctive large size and copious amounts of honeydew excrement that they produce; they can become quite a sticky mess if allowed to infest trees in a landscape.
Identification:
Tuliptree scale insects are small and can be easily overlooked, especially because they often blend in with the twigs of the plant. They are typically found on the undersides of leaves and along the branches. Key features include:
- Appearance: Mature females are hemispherical, black and orange mottled. Males are elongated and white (and are much smaller).
- Signs of Infestation: Infested trees may show signs of yellowing or dropping leaves, the presence of a sticky honeydew on leaves and surrounding surfaces, and sooty mold that grows on the honeydew.
Impact on Tulip Trees and Magnolias:
Tuliptree scale can have several detrimental effects:
- Leaf Health: The insects feed on the sap of the tree, which can lead to yellowing, wilting, and premature leaf drop.
- Tree Vigor: Heavy infestations can weaken the tree, leading to reduced growth and overall health.
- Environmental Effects: The honeydew excreted by the scales can attract ants/wasps/other insects and encourage the growth of sooty mold, further reducing photosynthesis and impacting tree health.
Management Strategies
Treatment for Tuliptree scale is highly effective. Exact treatment protocol depends on several factors and can be determined with the help of your arborist.