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Plants, Pests and Pathogens


Tuesday, May 12th, 2009

—–Technical Support: John_Dorner@ncsu.edu
—–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 web cam)

—–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
  • Oak leaf 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

—–Technical Support: Leigh Jay Hicks leighjay_hicks@ncsu.edu
—–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 GARDENSDr. 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

—-Technical Support: Leigh Jay Hicks leighjay_hicks@ncsu.edu
—–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

—–Technical Support: Leigh Jay Hicks, leighjay_hicks@ncsu.edu, 919-513-8147
—–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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Written By

Photo of Dr. Lucy BradleyDr. Lucy BradleyExtension Urban Horticulture Specialist (919) 513-2001 lucy_bradley@ncsu.eduHorticultural Science - NC State University
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