New Pest Detections in Maryland Nurseries

New Pest Detections in Maryland Nurseries

Emerald Ash Borer (August, 2003)

Emerald Ash Borer
"D" shaped emergence hole (R. Rabaglia, MDA)
Infested Ash Tree
Infested ash trees in Maryland (R. Rabaglia, MDA)

Daylily rust, Puccinia hemerocallidis

Infected Daylily Leaf
'Pardon Me' daylily leaf infected with daylily rust, P. hemerocallidis.
Daylily Leaf Blister
Closeup of daylily leaf with pustule exuding orange urediospores.

Honey Locust Disease, probable cause, Pseudomonas syringe pv. savastano

Honey Locust Branch
Fig. 5. Tip dieback and gall on 'Shademaster' honey locust branch.
Honeylocust Gall
Fig. 6. Closeup of honeylocust gall at the node of a honey locust plant.


To find out more, call the Plant Protection and Weed Management Section at (410)841-5920.​​​​