INSECTS of...Hardwood Branch and Stem

Common Name:	GIANT BARK APHID Several GIANT BARK APHIDS feeding on the underside of an oak branch
Species	Longistigma caryae
Common Hosts:	Basswood Tilia spp. Hickories Carya spp. Oaks Quercus spp. Pecan Carya illinoensis Sycamore Platanus spp. Walnut Juglans spp.
Description	Adult -- approximately 6 mm long; light to dark brown body; long hind legs; bluish-white bloom on body. Nymph -- similar to adult.
Importance	Severe infestations may result in shoot or branch dieback. Honeydew will damage cars parked under infested trees. Sooty mold prevalent.
Signs of Infestation	Foliage discoloration and branch dieback. Underside of branches populated by clusters of many dark large aphids.
Control	Promote tree vigor and health. Use an approved insecticide for high-value trees or especially damaging aphid populations.

Bulletin No. 196-A | Printed October, 1983 | Contact the Forest Health Section

GIANT BARK APHID