Midwest Vegetable Guide - 2022 - 50

Disease Management Strategies
Disease
Crop
Leafy
vegetables
endive, herbs,
lettuce,
spinach
Legumes
cowpea, dry
bean, lima
bean, pea, snap
bean
Root crops
beet, carrot,
parsnip,
radish, turnip
Botrytis gray mold
Bottom rot and drop
Downy mildew, white rust
Lettuce mosaic virus
Powdery mildew
Anthracnose
Bacterial blights
Rust
Soybean cyst nematode
White mold and gray mold
Aster yellows
Cercospora leaf spot, Alternaria leaf blight
Downy mildew, white rust
Root-knot nematode
White mold
Sweet corn Anthracnose
Goss' wilt
Leaf blights (southern corn leaf blight,
northern corn leaf blight, northern corn leaf
spot)
Rust
Smut
Fruiting
vegetables
eggplant,
pepper, tomato
Stewart's wilt
Anthracnose
Bacterial canker
Bacterial speck
Bacterial spot
Early blight
Fusarium crown and root rot
Late blight
Leaf mold
Powdery mildew
Root-knot nematode
Septoria leaf spot
Southern blight
Tobacco mosaic virus
Tomato spotted wilt virus
Verticillium
White mold
All vegetables
Damping-off
Tillage1 Seedborne Rotation2 Resistance Comments
2
2
NE
2
2
3
3
1
1
2
2
3
3
2
2
3
3
3
NE
2
1
3
3
3
3
3
2
1
2
2
2
3
3
1
1
2
2
1
No
No
Yes
Yes
No
Yes
Yes
No
No
No
Yes
Yes
Yes
No
No
No
Yes
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
No
No
No
No
No
No
No
NE
NE
3
1
2
3
2
3-4
1-3
NE
NE
2
3
>6
NE
1-3
1
1
NE
NE
NE
3-4
3-4
2
2-3
3-4
>6
NE
2
2
>6
2-3
>6
2
NE
>6
5-6
NE
No
No
Yes
Yes
No
Yes
No
Yes
No
No
No
Yes
No
Provide adequate spacing to reduce
humidity
There are many hosts that may harbor the
virus; manage aphid populations
Resistance is race-dependent
Rotation interval depends on the cyst
count in soil samples
Seed transmission is low, but possible;
destroy perennial weed hosts near highvalue
crops
Resistance availability varies by root crop
and pathogen
Cruciferous weeds and crops are also
hosts
No Wide host range affects rotational options
No
Avoid rotation with beans, cucurbits,
celery, and cabbage
Yes
Partial Control grassy weeds that are hosts
Yes
Yes
Yes
Partial
No
No
Yes
Yes3
Partial
Yes
No
Yes
No
Yes Wide host range
No
No
Yes
Yes
Yes
No
No
Favored by high temperatures
Spread by contact
Spread by thrips
Wide host range; rotate with grasses;
flood for 23-45 days
Avoid excess moisture, sanitize seedling
trays
11=tillage has limited effect, 2=tillage is of limited help, 3=tillage is an important control
2Numbers refer to the number of years that the field should be planted to a different crop. NE=not effective.
3Pepper only
Maintain balanced soil fertility
Spreads and survives in flea beetles
Stake and mulch
Disease is systemic
Some strains are copper resistant
Copper resistance reported - check with
your state pathologist
Some resistance to stem canker
Graft to resistant root stocks; use resistant
varieties
Does not overwinter in the Midwest
Notably a problem in high tunnels and
greenhouses; infected transplants will
experience disease outdoors
50
Midwest Veg Guide 2022
Midwest Vegetable Guide - 2022

Table of Contents for the Digital Edition of Midwest Vegetable Guide - 2022
