Pest Alert – Landscape Issues in November

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Be On the LookOut (BOLO) pest management updates from the NC State University Plant Disease and Insect Clinic (PDIC) are a great resource for keeping your garden healthy. Mike Munster, Plant Disease Diagnostician for Commercial Ornamentals, and Matt Bertone, PhD. posts these monthly pest management updates. They also do a live online class each month as well. Here is the November BOLO message.

Turfgrasses

  • Fairy ring (all turfgrasses)
  • Large patch (bermudagrass/zoysiagrass/centipedegrass/St. Augustinegrass)
  • Leaf spot caused by Bipolaris/Drechslera (bluegrasses/bermudagrass)
  • Microdochium patch (Kentucky bluegrass/bermudagrass) Red thread (Kentucky bluegrass/fescue/ryegrass)
  • Rust (Kentucky bluegrass/fescue/St. Augustinegrass/zoysiagrass)
  • Yellow patch (fescue/Kentucky bluegrass/ryegrass)
pdic bolos

Woody Ornamentals

  • Multiple hosts: Phytophthora root rot, Armillaria root rot (may still produce mushrooms early in the month), Botryosphaeria dieback, sooty mold, conks of wood decay fungi such as Pseudoinonotus dryadeus, improper planting
  • Multiple shrub species: root-knot nematodes
  • Arborvitae: Phytophthora root rot, Armillaria root rot
  • Azalea: Phytophthora root rot, Armillaria root rot, Phomopsis dieback, stunt nematode
  • Boxwood: Phytophthora root rot, boxwood blight, boxwood stem canker (Colletotrichum theobromicola), nematodes (lesion, root-knot, spiral)
  • Cherry-laurel: shot-hole
  • Indian hawthorn: Entomosporium leaf spot
  • Japanese black pine: pine wilt nematode
  • Japanese holly: black root rot, Armillaria root rot
  • Junipers: Phytophthora root rot (except Eastern red cedar), Armillaria root rot
  • Leyland cypress: cypress (Seiridium) canker, Botryosphaeria canker/dieback
  • Ligustrum (privet): Cercospora (Pseudocercospora) leaf spot
  • Magnolia, Southern: algal leaf spot
  • Oaks: Biscogniauxia canker Red-tip photinia: Entomosporium leaf spot
  • Rose: Armillaria root rot, crown gall, black spot, rose rosette
  • Spruce: Rhizosphaera needle cast

Herbaceous Ornamentals (Perennials, Bedding Plants)

  • Multiple species: frost damage
  • Liriope: anthracnose on leaf tips, Fusarium crown rot
  • Pansy/viola: Phytophthora root and crown rot, black root rot, Pythium root rot

Fruits & Nuts

  • Pecan: scab

Vegetables & Herbs

  • Multiple species: frost damage, nutrient deficiency
  • Cole crops: black rot, white leaf spot of turnip and
  • Swiss chard, downy mildew, Alternaria leaf spot

Arthropods Associated with Multiple Plants

  • Fall cankerworms (adults)
  • Bagworms (Thyridopteryx ephemeraeformis; bags often containing eggs)

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