Swier Extension Specialist Emeritus, Entomology Introduction Most spruce trees are damaged by one of two species of adelgids: the Eastern spruce gall adelgid ( Adelges abietis) the Cooley spruce gall adelgid ( Adelges cooleyi). Gall- making aphids eastern adelgids , “ woolly aphids ” include a variety of gall makers that primarily affect evergreens. Shetlar The eastern spruce gall adelgid Aldelges abietis ( Linnaeus) is commonly referred to as an aphid. The most obvious evidence of a Hemlock Woolly Adelgid population eastern is the copious masses of white filaments of wax produced by the females. Two fact gall eastern commonly attack Spruce. Adult females are brown about 1/ 16" long may have wings. The galls are somewhat larger than those caused by the Eastern spruce gall adelgid and occur on the tips of twigs. However aphids have long antennae characteristic. Formosan Termite. By fact autumn these galls are brown fact the shoot growth beyond them sheet is dead. Eastern spruce gall adelgids attack mainly Norway , white spruce occasionally other spruces. With their sucking mouth- parts, these.
Forest Tent Caterpillar. Cooley Spruce Gall Adelgid. There are two broods. The fact most common conspicuous adelgid in Colorado is the Cooley spruce gall adelgid sheet which produces a cone- like gall on spruce. It sheet was introduced from Europe prior to the 20th century has since spread across the northeastern United fact States , southern Canada to North Carolina. Find out how to identify , prevent control spruce gall galls in your spruce trees by reading this helpful fact sheet. Emerald Ash Borer.
Eastern spruce gall adelgid fact sheet. Penn State' s Fact Sheet. An introduced species from Europe, the eastern spruce gall adelgid fact has been recognized as a pest of ornamental fact spruce since the 16th century in Europe. Only females of this adelgid are known to occur. See fact sheet 5. They lay light green eggs.
Cooley Spruce Gall adelgid: Galls caused by the Cooley spruce gall adelgid occur on Colorado blue spruce , Sitka sheet spruce Engelmann spruce. The galls fact which are caused by feeding of the nymphs ( immature adelgids) on needles occur only on spruce. fact sheet Spruce Gall Adelgids Pest Fact Sheet 38 Dr. Eastern Spruce eastern Gall sheet Adelgid ( Adelges abietis L. These galls will be about 3/ 4" in total length and be pineapple- shaped. 534, Cooley Spruce Galls. Insect eastern and Disease Fact Sheet Compliments of New Century www. ) sheet The Eastern spruce gall adelgid is an introduced species that commonly infests Norway spruce black , red, is also found on white Englemann spruce.
comTREES Eastern Spruce Gall Adelgid The eastern spruce adelgid, is commonly referred to as an aphid. The sheet Eastern spruce gall adelgid causes galls to form at the base fact of the new shoots, in the spring. Eastern spruce gall adelgid fact sheet. Eastern Spruce Gall Adelgid This adelgid produces pineapple- shapedgalls at the base of the current year’ s growth. Abundance and damage varies from year to year. Ohio State University Extension Fact Sheet Entomology 1991 Kenny Road Columbus OhioEastern Spruce Gall Adelgid sheet HYGDavid J. Eastern Spruce Gall Adelgid.
Two gall- forming insects eastern commonly attack Spruce. com New Galls caused by Eastern Spruce Gall Adelgid. Eastern Tent Caterpillar. It fact was introduced from Europe prior to the 20th century has since spread across the northeastern United States , southern Canada to. The Cooley eastern gall adelgid is a problem in Douglas fir Christmas tree plantations especially when the two host species spruce ( primary host) Douglas fir ( alternate host) sheet are sheet planted close to one another. A plant gall is an abnormal plant tissue growth caused when an adelgid. The galls vary from 1/ 2" to 1" long and do not destroy the terminal bud. Cooley spruce gall adelgid / eastern spruce gall are caused by close relatives of aphids called adelgids.
Two gall commonly attack Spruce. Eastern Spruce gall adelgid forms pineapple like galls at the base of twigs. Galls caused by Cooley’ s Spruce gall adelgid look like miniature cones at the branch tips. The gall adelgids do not kill trees unless the infestation is heavy.
eastern spruce gall adelgid fact sheet
A few galls on a large tree are not serious. Bagworms make a sack by.