US Forest Service
1400 Independence Ave., SW
Washington DC 20250-0003

Disease

Picture of an oak twig affected by sudden oak death.

Sudden Oak Death

Phycomycota > Peronosporales > Pythiaceae
Phytophthora ramorum S. Werres, A.W.A.M. de Cock

photo courtesy of »

Joseph O'Brien, USDA Forest Service

Picture of a Sirex woodwasp.

Insecta >Hymenoptera > Siricidae
Sirex noctilio Fabricus

photo courtesy of »

William M. Ciesla, Forest Health Management International, www.forestryimages.org

Picture of a tree-of-heaven.

Magnoliopsida > Sapindales > Simaroubaceae > Ailanthusaltissima (P. Mill.) Swingle
Synonym(s): ailanthus, copal tree, tree-of-heaven

photo courtesy of »

Chuck Bargeron, The University of Georgia.

Picture of a New Zealand mud snail.

Potamopyrgus > Antipodarum

photo courtesy of »

D.L. Gustafson

Last modified: Tuesday, 18-Jul-2006 20:40:25 EDT