General Information about North Dakota Crops
North Dakota is a land of diverse agriculture. Small grains comprise a
large percentage of the cropped land area. The state is the leading producer of hard red spring
wheat (nearly 10 million acres), durum wheat (about 2.5 million acres), and barley (about 2.5
million acres). Other small grains, such as rye, winter wheat, and oats, are also produced
throughout the state.
Row crops such as dry beans, soybeans, sugarbeets, and corn are also common across North Dakota. The state is the leading producer of dry beans,
contributing more that 20% of the US production.
Oilseed crops are also common across the state. North Dakota has a history of flax production and continues to lead
the nation in the production of flax seed as well as sunflowers. Other oilseed crops such as
safflower and rapeseed/cranbe/canola are also grown in the state.
Vegetables such as potatoes have traditionally been a major crop in the northern end of the Red River Valley. North Dakota produces about
30,000 acres of seed potatoes, largely under dryland conditions, each year. Commercial
potatoes are produced on another 160,000 acres. Increasing irrigation opportunities are moving
potato production areas westward in the state. Carrot acreage has
increased steadily over the past three years. There are currently four cooperatives producing
carrots in the Red River Valley. About two thirds of those production acres are in North Dakota.
Onions are also a vegetable crop that has shown steady increases in
acreage in recent years.
Other specialty crops are grown in the state as well. Many of these crops fall in to other categories as well, but are currently low acreage efforts and as such
are treated separately. Crops such as lentils, lupines, field peas, and chickpeas are covered
here.
Small Grains
Barley
- Aster yellows (Aster yellows phytoplasma)
- Barley yellow dwarf (Barley yellow dwarf virus)
- Basal glume rot (Pseudomonas syringae pv. atrofaciens)
- Black chaff and bacterial leaf blight (Xanthomonas campestris pv. translucens)
- Blue dwarf (Oat blue dwarf virus)
- Common root rot
(Helminthosporium sativum)
- Covered smut (Ustilago hordei)
- Crown rust (Puccinia graminis f.sp.)
- Ergot
(Claviceps purpurea)
- Fusarium head blight or Scab (Fusarium spp., esp. F. graminearum)
- Giberella/Fusarium seedling blight (Gibberella zeae and Fusarium spp.)
- Loose smut (Ustilago tritici)
- Net blotch (Pyrenophora teres)
- Powdery mildew (Erysiphe graminis f.sp. hordei)
- Scald (Rhynchosporium secalis)
- Septoria leaf spot (Septoria passerinii)
- Spot blotch (Helminthosporium sativum)
- Stem rust (Puccinia graminis f.sp. tritici, especially the QCC race)
- Take all (Gaeumannomyces graminis)
Wheat (Hard Red Spring Wheat) and Durum (Hard Amber Durum)
- Aster yellows (Aster yellows phytoplasma)
- Bacterial leaf blight (Pseudomonas syringae pv. syringae)
- Barley yellow dwarf (Barley yellow dwarf virus)
- Basal glume rot (Pseudomonas syringae pv. atrofaciens)
- Black chaff and bacterial leaf blight (Xanthomonas campestris pv. translucens)
- Blue dwarf (Oat blue dwarf virus)
- Common root rot
(Helminthosporium sativum)
- Ergot
(Claviceps purpurea)
- Fusarium head blight
or Scab (Fusarium spp., esp. F. graminearum)
- Giberella/Fusarium seedling blight (Gibberella zeae and Fusarium spp.)
- Glume blotch (Septoria nodorum)
- Leaf rust
(Puccinia recondita)
- Loose smut (Ustilago tritici)
- Pink seed (Erwinia rhapontici)
- Powdery mildew (Erysiphe graminis f.sp. hordei)
- Red smudge (Pyrenophora tritici-repentis)
- Septoria leaf spots (Septoria avenae, S. nodorum, and S. tritici)
- Spot blotch (Helminthosporium sativum)
- Stem rust (Puccinia graminis f.sp. tritici)
- Tan spot
(Pyrenophora tritici-repentis)
- Take all (Gaeumannomyces graminis)
-
Wheat streak mosaic (Wheat streak mosaic virus)
Oats
- Aster yellows (Aster yellows phytoplasma)
- Bacterial stripe blight (Pseudomonas syringae pv. striafaciens)
- Basal glume rot (Pseudomonas syringae pv. atrofaciens)
- Black chaff and bacterial leaf blight (Xanthomonas campestris pv. translucens)
- Blue dwarf (Oat blue dwarf virus)
-
Common root rot (Helminthosporium sativum)
- Crown rust (Puccinia coronata)
- Ergot
(Claviceps purpurea)
- Fusarium head blight or Scab (Fusarium spp., esp. F. graminearum)
- Giberella/Fusarium seedling blight (Gibberella zeae and Fusarium spp.)
- Glume blotch (Septoria nodorum)
- Halo blight (Pseudomonas syringae pv. coronafaciens)
- Leaf rust (Puccinia recondita)
- Loose smut (Ustilago avenae)
- Powdery mildew (Erysiphe graminis f.sp. hordei)
- Red leaf (Barley yellow dwarf virus)
- Septoria leaf spots (Septoria avenae)
- Take all (Gaeumannomyces graminis)
-
Wheat streak mosaic (Wheat streak mosaic virus)
Row Crops
Corn
- Anthracnose (Colletotrichum graminicola)
- Bacterial leaf blight (Pseudomonas sp.)
- Bacterial stalk rot (Erwinia spp.)
- Common corn smut (Ustilago maydis)
- Crazy top (Sclerophthora macrospora)
- Diplodia stalk rot (Diplodia maydis)
- Eyespot (Kabatiella zeae)
- Fusarium ear and stalk rot (Fusarium spp.)
- Gibberella ear and stalk rot (Gibberella spp.)
- Gray leaf spot (Cercospora zeae-maydis)
- Helminthosporium leaf spot (Helminthosporium carbonum)
- Holcus spot (Pseudomonas syringae)
- Maize dwarf mosaic (Maize dwarf mosaic virus)
- Northern corn leaf blight (Helminthosporium turcicum)
- Physoderma brown spot (Physoderma maydis)
- Pythium seed and seedling blight (Pythium spp.)
Dry Edible Beans
- Alternaria leaf spot (Alternaria alternata)
- Angular leaf spot (Phaeoisariopsis griseola)
- Anthracnose (Colletotrichum lindemuthianum)
- Brown spot (Pseudomonas syringae pv. syringae)
- Common blight (Xanathomonas campestris pv. phaseoli)
- Fusarium root rot (Fusarium solani)
- Gray mold (Botrytis cinerea)
- Halo blight (Pseudomonas syringae pv. phaseolicola)
- Pythium root rot (Pythium spp.)
- Rhizoctonia root rot (Rhizoctonia solani)
- Rust (Uromyces phaseoli)
- White mold (Sclerotinia sclerotiorum)
Sugarbeets
Oilseed Crops
Canola
- Alternaria leaf spot or Blackspot (Alternaria brassicola)
-
Blackleg (Phoma lingam, virulent strain)
- Sclerotinia stem rot (Sclerotinia sclerotiorum)
- Staghead (Albugo candidans)
Crambe
- Alternaria leaf spot or Blackspot (Alternaria brassicola)
- Sclerotinia stem rot (Sclerotinia sclerotiorum)
Flax
- Aster yellows (Aster yellows phytoplasma)
- Crinkle (Oat Blue Dwarf Virus)
- Flax wilt (Fusarium oxysporum fsp. lini)
- Pasmo (Septoria linicola)
- Rust (Melampsora lini)
Safflower
- Sclerotinia wilt, middle stalk rot and head rot (Sclerotinia sclerotiorum)
Soybeans
- Bacterial blight (Pseudomonas glycines)
- Rhizoctonia root rot (Rhizoctonia solani)
- Fusarium root rot (Fusarium solani)
- Pythium root rot (Pythium spp.)
- Phytophthora root and stem rot (Phytophthora megasperma ssp. sojae)
Sunflowers
- Rhizopus head rot (Rhizopus stolonifer)
- Sclerotinia wilt, middle stalk rot and head rot (Sclerotinia sclerotiorum)
- Septoria leafspot (Septoria helianthi)
- Bacterial leafspot (Pseudomonas spp.)
Vegetables
Potatoes
Seed diseases
- Bacterial soft rot (Erwinia carotovora pv. carotovora)
- Blackleg (Erwinia carotovora pv. atroseptica)
-
Rhizoctonia canker/Black scurf (Rhizoctonia solani)
Leaf and stem blights
Wilt diseases
- Fusarium wilt (F. solani, F. oxysporum, and others)
- Verticillium wilt (V. dahleae)
- Black dot (Colletotrichum coccoides)
- Bacterial ring rot
(Clavibacter michganensis ssp. sepedonicus)
Storage rots
-
Leak (Pythium spp.)
-
Pink rot (Phytophthora erythroseptica)
- Late blight (Phytophthora infestans)
- Dry rot (F.
sambucinum and others)
Carrots
Field diseases
- Aster yellows (Aster yellows phytoplasma)
- Bacterial leaf spot (Xanthomonas campestris pv. carotae)
- Bacterial soft rot (Erwinia carotovora pv. carotovora and E. carotovora
pv. atroseptica)
- Alternaria leaf blight (Alternaria dauci)
- Cercospora leaf blight (Cercospora carotae) -- Suspected, but not confirmed as yet
in ND
- Crown rot (Rhizoctonia solani)
- Pythium root dieback (Pythium spp.)
Storage rots
- Cottony soft rot (Sclerotinia sclerotiorum)
- Crater rot (Rhizoctonia carotae spp.)
- Rhizopus wooly soft rot (Rhizopus spp.)
Onions
Field diseases
- Bacterial soft rot (Erwinia carotovora pv. carotovora)
- Botrytis leaf blight (Botrytis cinerea)
- Downy mildew (Peronospora destructor)
- Fusarium basal rot (Fusarium oxysporum)
- Neck rot (Botrytis alii)
- Pink root (Pyrenochaeta terrestris)
- Purple blotch (Alternaria porri)
- Pythium root dieback (Pythium spp.)
- Smudge (Colletotrichum circinans)
- Stemphyllium leaf spot (Stemphyllium vesicarium)
Storage rots
- Bacterial soft rot (Erwinia carotovora pv. carotovora)
- Neck rot (Botrytis alii)
- Smudge (Colletotrichum circinans)

Forage Crops
Alfalfa
- Anthracnose (Colletotrichum truncata)
- Rust (Uromyces striatus)
- Spring Black Stem (Phoma medicaginis)
Specialty Crops
Lentils
- Ascochyta blight (A. lentis)
- Anthracnose (Colletotrichum lentis)
Lupines
- Anthracnose (Colletotrichum truncatum)
Field Peas
- Ascochyta blight (A. pisi)
- Bacterial blight (Pseudomonas syringae pv. pisi)
Chickpeas
- Ascochyta blight (A. rabei)
Email: hbrown@ndsuext.nodak.edu
Published by The Department of Plant Pathology