Description: Plants
affected by take?all occur in patches in the field. Affected plants are stunted,
yellowed, have fewer tillers and die prematurely. Prematurely killed plants
have bleached out heads or white heads that appear in contrast to the green
heads of healthy plants. Diagnostic black, scurfy, mold symptoms occur on roots
and lower stems.
Location: Take-all may occur anywhere in Ohio. Fields with quackgrass
infestations or fields planted back to wheat with no rotation are likely problem
fields.
Time of attack: The fungus attacks young seedlings in the fall, but symptoms
are usually not seen until early spring when affected plants remain yellow after
spring green up. Blackening of root systems can be detected in late May and
June.
Management:
· Crop rotation
· Till residues
· Adjust soil pH to 6.5-7.0
· Control perennial grass weeds