Ash Rust on leaves and petioles. Photo credit: N. Gregory

Lilac Ash borer adults. Photo credit: Whitney
Cranshaw, Colorado State University

Lilac Ash borer pupal skin. Photo credit: Whitney Cranshaw, Colorado State University

Emerald Ash borer adult. Photo credit: Debbie Miller, USDA Forest Service

Powdery mildew on callery pear ‘Cleveland Select’. Photo credit: N. Gregory

Honeylocust plant bug. Photo credit: John A. Weidhass, VPI

Honeylocust damage. Photo credit: Dan Herms

Pine needle scale in the UDBG. Photo credit: B. Kunkel

Curling of new growth on fir due to thrips. Photo credit: N. Gregory

Red thread on turf. Photo credit: N. Gregory

Swiss needlecast on Douglas fir. Photo credit: N.
Gregory

Lace bug adults, nymphs and tar on leaf
underside. Photo credit: B. Kunkel

Heavy lace bug damage. Photo credit: B. Kunkel

Boxwood psyllid damage. Photo credit: B.
Kunkel and N. Gregory

Boxwood leafminer. Photo credit: N. Gregory and B. Kunkel

Boxwood psyllid. Photo credit: N. Gregory and B. Kunkel

Symptoms of cucumber mosaic virus (CMV) on
lobelia. Photo credit: N. Gregory

Tomato spotted wilt virus (TSWV) on
dahlia. Photo credit: N. Gregory