ProblemPublication
Drought
Susan K. Hagle, USDA Forest Service,
Bugwood.org
Environmental
(Drought)
How Dry Seasons Affect Woody Plants
Stress cones
Chris Schnepf, University of Idaho,
Bugwood.org
Environmental
(Stress)
Woody Plants Under Stress
Eastern hemlock
Steven Katovich, Bugwood.org
Root Rot
(Phytophthora)
Hemlock:
Phytophthora Root Rot
Elongate hemlock scale
John .A. Davidson, Univ. Md, College Pk, Bugwood.org
Scale
US Forest Service Pest Alert - Elongate Hemlock Scale
Spruce spider mite

Eric R. Day, Virginia Polytechnic Institute
and State University, Bugwood.org
Spider MiteSpider Mites on Landscape Plants