Insect and Disease Pests In Delaware’s Forests. Envirothon Training Updated October 2007 Glenn (Dode) Gladders. Symptoms Changes in the plant’s appearance that indicate something is happening. Ex: crown dieback, wilting, cankers. Signs
Updated October 2007
Glenn (Dode) Gladders
Changes in the plant’s appearance that indicate something is happening. Ex: crown dieback, wilting, cankers.
Indications of the insect or disease itself. Ex: frass, pitch tubes, fungal fruiting bodies.Symptoms vs. Signs
Emerald Ash Borer
Asian Longhorned Beetle
Southern Pine Beetle
Sirex Wood Wasp
Bacterial Leaf Scorch
Sudden Oak Death
For each, know:
Present in Delaware?
Symptoms & Signs
Type of damage
Control measuresTHE ENVIROTHON SEVEN!
Adults arebright greenand easy to identify.
GalleriesEmerald Ash Borer (EAB)
(Remember, it has not been detected yet in Delaware)
Infested trees must be removed,
and chipped to destroy all beetles.
Packing materials are inspected at ports of entry.
Small round holes
Infested trees can be cut and
burned, chipped, or sprayed.
Defoliation can be seen from the air during June survey flights
Symptoms / Signs
Round exit holes
Wilting and discoloration
Red pine trap tree at White Clay Creek SP
Bacteria clogging xylem
Marginal leaf scorch