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NC State Extension

BOLO March

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Month-by-month lists of common plant diseases, pests, and other problems you may encounter in North Carolina yards and gardens.

Back to BOLO list of months.


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)

Spring dead spot (bermudagrass/zoysiagrass)

Yellow patch (fescue/Kentucky bluegrass/ryegrass)

Woody Ornamentals

Multiple hosts: cold injury (split and loose bark on stems), frost injury to new growth, winter injury of evergreens, Botryosphaeria canker/dieback, Phytophthora root rot, Armillaria root rot, sooty mold, improper planting, branch pruning by squirrels, sapsucker injury

Multiple shrub species: root-knot nematodes

Arborvitae: Phytophthora root rot, Armillaria root rot

Azalea: Phytophthora root rot, Armillaria root rot, Phomopsis dieback, stunt nematode

Black cherry: black knot

Black gum: felt fungus (Septobasidium)

Boxwood: Phytophthora root rot, boxwood blight, nematodes (lesion, root-knot, spiral)

Camellia: camellia petal blight, ring spot & flower break, freeze injury

Cherry-laurel: shot-hole, Botryosphaeria canker/dieback

English Ivy: anthracnose, bacterial leaf spot

Euonymus: powdery mildew

Gardenia: cold injury, Phytophthora root rot

Hollies: felt fungus (Septobasidium)

Indian hawthorn: Entomosporium leaf spot

Japanese holly: black root rot, Armillaria root rot

Junipers: Phytophthora root rot (except Eastern red cedar), Armillaria root rot, cedar-apple rust and cedar-quince rust sporulating (especially on Eastern red cedar and especially the latter)

Ligustrum (privet): Cercospora (Pseudocercospora) leaf spot

Leyland cypress: Phytophthora root rot, Armillaria root rot, Cypress (Seiridium) canker, Botryosphaeria canker/dieback, Passalora needle blight, algae on foliage

Loropetalum: bacterial gall (knot), Cercospora (Pseudocercospora) leaf spot

Magnolia, Southern: algal leaf spot

Oak: felt fungus (Septobasidium)

Red-tip photinia: Entomosporium leaf spot

Rose: Armillaria root rot, common canker, Botrytis canker, crown gall, black spot, rose rosette

Spruce: Stigmina needle blight

Herbaceous Ornamentals (perennials, bedding plants)

Liriope: anthracnose on leaf tips and secondary leaf spots on last year’s foliage, Fusarium crown rot

Pachysandra: Volutella blight

Pansy/viola: nutrient deficiency, Botrytis blight, black root rot, Pythium root rot, Cercospora leaf spot

Fruits & Nuts

Blackberry: Cane blight

Cherry and plum: black knot

Peach: leaf curl, brown rot (blossom/twig phase)

Vegetables & Herbs

Cole crops: Sclerotinia white mold

Onion: Botrytis leaf blight

Arthropods of the General Landscape

Ground-nesting solitary bees (typically Andrenidae & Colletidae)

Queen social wasps (Vespidae: paper wasps, yellowjackets, hornets) becoming active, looking for nest sites

Clover mites (Bryobia sp.) invading homes

Monkey beetles (Hoplia trivialis) in yards and homes

Eastern subterranean termite swarmers (Reticulitermes flavipes)

Arthropods Associated with Multiple Plants

Fall cankerworms (larvae & adults)

Bagworms (Thyridopteryx ephemeraeformis; bags often containing eggs)