Tag Archives: 2007

Insect Hotline Issue 21

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Magnolia Scale

Sooty mold on trunk as a result of magnolia scale honeydew production

Honeydew being produced by magnolia scale

Magnolia Scale Cluster

Branch Dieback Due to magnolia scale

Ants With magnolia scales




Tuliptree Scale

All magnolia scale Photos by Brian Kunkel, Extension Ornamental IPM Specialist, University of Delaware. Tuliptree scale picture by Gerald Lenhard, bugwood.org

Disease Hotline Issue 21

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Drought and heat effects on perennials – Hosta

Photo by Gordon Johnson, University of Delaware
Brown patch produces characteristic symptoms on tall fescue leaves: irregularly shaped lesions that are tan in color with a dark brown border.

From a distance, brown patch appears in brown, tan, or yellow patches ranging from 6 inches to several feet in diameter. The infected leaves typically remain upright, rather than collapsing to the ground.
Brown Patch Pictures From North Carolina State University Plant Pathology Extension

Turfgrass Disease Information Note 15 (TURF-015)

Powdery Mildew on Lilac
Photo from Iowa State University Plant Disease Clinic

Weed Hotline Issue 20

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Marestail (horseweed) in Flower

Marestail and Ragweed in Former Farmland Site

Former Farmland Field Growing Up in Marestail Prior to Being Developed

Canada Thistle, Common in Former Farmland Sites

Canada Thistle Showing Fluffy Seeds

Canada Thistle Patch
Bull Thistle, Not to be Confused with Canada Thistle
All Photos by Gordon Johnson
Extension Agriculture and Commercial Horticulture Agent, University of Delaware, Kent County

Insect Hotline Issue 20

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Leopard Moth Larvae and Damage
Photo by Petr Kapitola, State Phytosanitary Administration, Bugwood.org

Leopard Moth Larvae and Damage
Photo by Jean-Paul Grandjean, Office National des Forêts, Bugwood.org

Leopard Moth Adult

Photo by James Solomon, USDA Forest Service, Bugwood.org

Leopard Moth
Photo by Louis-Michel Nageleisen, Département de la Santé des Forêts, Bugwood.org

Disease Hotline Issue 20

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Diplodia (Sphaeropsis) Tip Blight
Photo from the Minnesota Department of Natural Resources Archive, Minnesota Department of Natural Resources, Bugwood.org

Diplodia (Sphaeropsis) Tip Blight
Photo from the Minnesota Department of Natural Resources Archive, Minnesota Department of Natural Resources, Bugwood.org

Diplodia (Sphaeropsis) Tip Blight

Photo from the USDA Forest Service Archive, USDA Forest Service, Bugwood.org