Weed Hotline Issue 22

Posted on August 24, 2007 by campus

Horseweed or Marestail Seedling

Downy Brome Seedling

Shepard’s Purse Seedling

Wild Mustard Seedling

Annual Bluegrass Seedling

Purple Deadnettle Seedling

Henbit Seedling

Common Chickweed Seedling

All Photos From Online Pacific Northwest Insect and Weed Management Handbooks

Photos Credit: Oregon State University Jed Colquhoun and Larry Burrell photo Collection

Wild Radish

Hairy Bittercress

Corn Speedwell

Persian Speedwell

Purslane Speedwell

Ivyleaf Speedwell

Field Violet or Field Pansy

Yellow Rocket

Annual Ryegrass

Mousear chickweed

All Photos Courtesy of Shawn Askew, Turfgrass Weed Science, Virginia Polytechnic Institute & State University. www.ppws.vt.edu/~saskew/turfweeds/ or www.turfweeds.net

Insect Hotline Issue 22

Posted on August 24, 2007 by campus

Baldcypress (Taxodium) Rust Mite Damage – Whole Tree View

Baldcypress Rust Mite Damage – Branch View

Baldcypress Rust Mite Damage – Needle View

Baldcypress Rust Mite Magnified

All photos by Dr. Casey Sclar, Plant Health Care Division Leader, Longwood Gardens

Disease Hotline Issue 22

Posted on August 24, 2007 by campus

Mushrooms growing on Mulch

Photo from University of Cincinatti, Clermont College, Biology

Slime mold on mulch

Photo from University of Tennesee Plant Pathology

Slime mold on mulch

Photo by Peggy Sellers, Purdue University

Birds nest fungus

Photo from Department of Plant Pathology, Washington State University

Stinkhorn mushroom Clathrus spp

Photo by Paul A. Mistretta, USDA Forest Service, Bugwood.org

Dog stinkhorn fungus Mutinus caninus

Photo by Chris Evans, River to River CWMA, Bugwood.org

Stinkhorn mushroom Linderia columnata

Photo by David J. Moorhead, University of Georgia, Bugwood.org

Septoria Leaf Spot on Cornus florida

Photo from Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org

Septoria Leaf Spot on Cornus

Photo from Online Guide to Plant Disease Control, Oregon State University

http://plant-disease.ippc.orst.edu/disease.cfm?RecordID=1279

What’s Hot HL 21

Posted on August 17, 2007 by campus

Mass of Webworms

Extensive Webbing by Webworms

Webworm Damage

Dogwood Sawflies

Dogwood Sawfly Damage

White peach or prunicola scale

All Photos by Brian Kunkel, Extension Ornamental IPM Specialist, University of Delaware

Weed Hotline Issue 21

Posted on August 17, 2007 by campus

Annual Bluegrass Seedlings

Photo from Weed Management in Nursery Crops, Oregon State University

http://oregonstate.edu/dept/nursery-weeds/weedspeciespage/annual_bluegrass/annual_bluegrass_page.html

Annual Bluegrass Seedlings -Note Boat Shaped Tips

Photo from Weed Management in Nursery Crops, Oregon State University

http://oregonstate.edu/dept/nursery-weeds/weedspeciespage/annual_bluegrass/annual_bluegrass_page.html

Annual Bluegrass in Tall Fescue Turf

Photos from Turffiles at North Carolina State University

www.turffiles.ncsu.edu

Annual Bluegrass in Flower (Spring)

Photo from Turfweeds.net at Virginia Tech