Plants, Pests and Pathogens

Tuesday, May 12th, 2009

—–Host: Lucy Bradley
—–Featured Speaker on Urban Tree Entomology: Steve Bambara
—–Entomology  – David Stephan

• Some common spring scales
• Galls
• Eriophyid mite galls
• Midge galls
• Wasp galls
• Millipede (live on webcam)

—–Plant Pathology  – Mike Munster

• How to take a good tree sample
• Normal leaf drop of magnolia and holly
• Abiotic problems
• Cold injury
• Mechanical damage
• High pH / iron chlorosis
• Anthracnose (Colletotrichum) on liriope
• Oakleaf blister (Taphrina)
• Exobasidium leaf gall of camellia, rhododendron
• Seiridium canker on Leyland cypress
• Dog vomit slime mold (Fuligo septica)
• Lacebug injury on azalea

Tuesday, June 9th, 2009

—–Host: Steve Bambara
—-Regional Updates
———-NE Coastal/Plains Agents: Katy Shook
———-SE Coastal/Plains Agents: David Barkley
———-Piedmont Agent: Darrell Blackwelder

—-Featured Speakers on RAIN GARDENS: Dr. Helen Kraus and Dr. Anne Spafford

—–Entomology -David Stephan

• Carrot beetle (Bothynus (Ligyrus) gibbosus)
• True bugs
• A predatory stink bug (Euthyrhynchus floridanus)
• Leaf-footed bug (Leptoglossus sp.)
• Stink bug (Euschistus sp.)
• Townsend scale (Abgrallaspis townsendi)
• Snail fecal material
• True flies
• Migrating darkwinged fungus gnat larvae (Bradysia sp.)
• Warble/bot fly (Cutereba buccata)
• European earwig (Forficula auricularia)

—–Plant Pathology – Mike Munster

• Powdery mildews
• Daylily leaf streak (Aureobasidium microstictum)
• Armillaria (mushroom) root rot
• Southern blight (Sclerotium rolfsii)
• Comparison of southern blight and southern bacterial wilt
• Tomato spotted wilt virus on tomato
• Glyphosate injury on tomato
• Root-knot nematodes
• Downy mildew of cucurbits (Pseudoperonospora cubensis)

Tuesday, July 14th, 2009

—–Host: Lucy Bradley
—–Regional Updates
———-Coastal/Plains Agent: Anne Edwards
———-Mountains/Foothills Agent: Diane Turner
———-Weed Issues in NE: Tom Campbell and Steve Bambara

—-Featured Speaker on ORGANIC GARDENING: Steve Moore

—–Entomology -David Stephan

• Mystery photo (cicada tympanum)
• One of the fishing spiders (Dolomedes sp., probably tenebrosus)
• Ticks
• Lone star tick (Amblyomma americanum)
• American dog tick (Dermacentor variabilis)
• Squash bug (Anasa tristis)
• One of the annual cicadas (Tibicen sp.)
• Scale insects
• Pyriform scale (Protopulvinaria pyriformis)
• Pine needle scale (Chionaspis pinifoliae)
• Beetles
• Striped cucumber beetle (Acalymma vittatum)
• Whitefringed beetle (Graphognathus sp.)
• Mottled tortoise beetle (Deloyala guttata)
• Parasitoid wasp pupae, probably Eulophidae
• Miscellaneous leaftier caterpillars on hardwoods
• Damage to white oak by unidentified spider mite

—–Plant Pathology – Mike Munster

• Leaf spot on Loropetalum caused by Pseudocercospora
• Entomosporium leaf spot on Indian hawthorn
• Botryosphaeria canker on redbud
• Two rusts on hemlock
• Hemlock-hydrangea rust (Thekopsora hydrangea)
• Hemlock twig rust (Melampsora farlowii)
• Phytoplasma diseases
• Confirmations and suspicions on crape myrtle
• Aster yellows on marigold, carrot, coneflower
• Hydrangea showing virescence
• Others
• Suspected herbicide injury on crape myrtle
• Foliar nematodes (Aphelenchoides spp.)
• Tomato woes
• Southern bacterial wilt (Ralstonia solanacearum)
• Keep a watch out for late blight (Phytophthora infestans)
• Root-knot nematode
• Septoria leaf spot
• Early blight (Alternaria)

Tuesday, August 11th, 2009

—–Host: Lucy Bradley
—–Regional Updates
———-Mountains/Foothills Agent: Donna Teasley
—–Featured Speaker on PERMACULTURE : Will Hooker
—–Entomology -David Stephan

• Greenhouse thrips (Heliothrips haemorrhoidalis)
• Elongate hemlock scale (Fiorinia externa) and hemlock woolly adelgid (Adelges tsugae)
• Beetles
• Cottonwood leaf beetle (Chrysomela scripta)
• Green June beetle (Cotinis nitida)
• Caterpillars
• Viceroy butterfly (Limenitis archippus)
• Big cranberry spanworm, a.k.a. purplish-borwn looper (Eutrapela clemataria)
• Wasps
• Paper wasp (Polistes sp.)
• Black and yellow mud dauber (Sceliphron caementarium)
• One of the potter wasps (Monobia quadridens)

—–Plant Pathology – Mike Munster

• Late blight confirmed in Henderson Co.
• Anthracnose diseases
• — on English ivy caused by Colletotrichum trichellum
• — on lima bean caused by Colletotrichum lindemuthianum
• Black rot of crucifers (Xanthomonas campestris pv. campestris)
• Wetwood and Slime Flux of hardwood trees
• Bacterial leaf scorch (Xylella fastidiosa) of oaks, sycamore, grape, and oleander
• Algal leaf spot (Cephaleuros sp.)
• Nuicance fungi in mulch (dog vomit slime mold; birds’ nest fungi; artillery fungus)
• J-rooting and weed-trimmer damage

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