What’s Hot HL 23

Aschocyta Blight on Lily-of-the-Valley
Photo by Bob Mulrooney, University of Delaware, Extension Plant Pathologist

Anthracnose on Walnut

Photo From an Online Guide to Plant Disease Control, Oregon State University Extension

Scoliid wasps are usually considered beneficial insects because they help control green June beetle and other grubs.

Photo from the University of Minnesota

Scoliid Wasps Searching and Feeding
Photos by Brian Kunkel, Extension Ornamental IPM Specialist, University of Delaware

Weed Hotline Issue 23

Japanese Stiltgrass Close Up

Japanese Stiltgrass Competing with Planted Ferns

Stand of Japanese Stiltgrass in Wooded Clearing

Japanese Stiltgrass Mowed Area Showing Regrowth

Japanese Stiltgrass Mowing Effects

All Pictures by Susan Barton, University of Delaware, Extension Ornamentals Specialist

Insect Hotline Issue 23

Japanese Beetle Grubs
Photo by John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org
Asiatic Garden Beetle Grubs

Photo Credit John Obermeyer, Purdue Cooperative Extension Service

Phyllophaga species include May beetles, June beetles, and scarab beetles. These grubs have a multi-year life cycle.

Photo from Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org

Third instar oriental beetle with Tiphia vernalis (parasite) egg on ventral side

Photo by Mike Reding & Betsy Anderson, USDA ARS, Bugwood.org

Green June Beetle Grub

Photo from Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org

Northern Masked Chafer Grub

Photo by Mike Reding & Betsy Anderson, USDA ARS, Bugwood.org

Disease Hotline Issue 23

Botrytis Stem Canker

Botrytis on Geranium (Pelargonium)
Above 2 Photos from New England Greenhouse Update

Foliar Nematodes Magnified

Photo by Jody Fetzer, New York Botanical Garden, Bugwood.org

Foliar Nematode Damage to Mums
Photo by Jody Fetzer, New York Botanical Garden, Bugwood.org

Foliar Nematode on Anemone
Photo by Jody Fetzer, New York Botanical Garden, Bugwood.org

Foliar Nematode on Butterfly Bush

Photo by Jody Fetzer, New York Botanical Garden, Bugwood.org

Foliar Nematodes on Ferns and Hostas

Photos by Bob Mulrooney, Extension Plant Pathologist, University of Delaware

Weed Hotline Issue 22

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

Disease Hotline Issue 22

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

Weed Hotline Issue 21

Annual Bluegrass Seedlings
Photo from Weed Management in Nursery Crops, Oregon State University

Annual Bluegrass Seedlings -Note Boat Shaped Tips
Photo from Weed Management in Nursery Crops, Oregon State University

Annual Bluegrass in Tall Fescue Turf
Photos from Turffiles at North Carolina State University

Annual Bluegrass in Flower (Spring)
Photo from Turfweeds.net at Virginia Tech

Insect Hotline Issue 21

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